filters — 100.00% verified visual parity

← all categories · PASS 46 · FAIL 0 · REFERENCE-DISPUTED 1 · 47 total · 300 DPI

diff colours:MissingExtraColorErrMatchFull-page diff: matching and per-channel ≤1.0% pixels are blank; coloured classes are same-coordinate above-floor evidence. Exact RGBA mismatch remains numeric.

show PASS 46status class min diff% sort

filter: url(#id) with feTurbulence and feDisplacementMap — 0.00% verified visual parity PASS 0 · FAIL 0 · REFERENCE-DISPUTED 1all categories ↑

REFERENCE-DISPUTED 10068 px · above-floor 3.18% · raw 3.20% max-page diff r2-filter-url-feturbulence-displacement · feturbulence-displacement · REFERENCE DISPUTEDColorValueΔE 45.7

why: fill recolour ΔRGB(-3,-42,-42) (ΔE 45.7)

Procedural SVG filter primitives must affect static output: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

reference dispute: Filter Effects 1 section 9.21 supplies the exact feTurbulence algorithm: zero and over-length random gradient vectors are rejected and consume a new pseudorandom pair. Chromium PDF and Firefox screen output instead agree with the legacy normalize-every-pair field; authored position controls confirm Chromium still uses the required local coordinate system. Its PDF is therefore a compatibility canary, not a normative pixel oracle.

regions (16 total; showing 16 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	16	10068	26,36 → 133,103	9996	total 3.4% · largest 3.3% · max ΔE 45.7

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	34,36 → 133,103	3.3	ΔE 45.7 ΔRGB(-3,-44,-44)	fill recolour ΔRGB(-3,-44,-44) (ΔE 45.7)
ColorValue	124,64 → 124,65	0.002665	ΔRGB(0,-8,-8)	fill recolour ΔRGB(+0,-8,-8) (ΔE 0)
ColorValue	124,66 → 124,67	0.002665	ΔRGB(0,-17,-17)	fill recolour ΔRGB(+0,-17,-17) (ΔE 0)
ColorValue	102,84 → 103,85	0.001999	ΔRGB(1,-12,-12)	fill recolour ΔRGB(+1,-12,-12) (ΔE 0)
ColorValue	77,95 → 77,95	0.001999	ΔRGB(0,-29,-29)	fill recolour ΔRGB(+0,-29,-29) (ΔE 0)
ColorValue	50,37 → 50,37	0.001332	ΔRGB(1,49,49)	fill recolour ΔRGB(+1,+49,+49) (ΔE 0)
ColorValue	38,50 → 38,50	0.001332	ΔRGB(1,43,43)	fill recolour ΔRGB(+1,+43,+43) (ΔE 0)
ColorValue	36,62 → 36,63	0.001332	ΔRGB(2,86,86)	fill recolour ΔRGB(+2,+86,+86) (ΔE 0)
ColorValue	124,65 → 124,66	0.001332	ΔRGB(0,-16,-16)	fill recolour ΔRGB(+0,-16,-16) (ΔE 0)
ColorValue	102,85 → 102,85	0.001332	ΔRGB(0,-38,-38)	fill recolour ΔRGB(+0,-38,-38) (ΔE 0)
ColorValue	100,86 → 100,86	0.001332	ΔRGB(0,-35,-35)	fill recolour ΔRGB(+0,-35,-35) (ΔE 0)
ColorValue	79,91 → 80,91	0.001332	ΔRGB(0,-21,-21)	fill recolour ΔRGB(+0,-21,-21) (ΔE 0)
ColorValue	49,92 → 49,92	0.001332	ΔRGB(0,-27,-27)	fill recolour ΔRGB(+0,-27,-27) (ΔE 0)
ColorValue	121,94 → 121,94	0.001332	ΔRGB(0,-27,-27)	fill recolour ΔRGB(+0,-27,-27) (ΔE 0)
ColorValue	28,101 → 28,101	0.001332	ΔRGB(1,20,20)	fill recolour ΔRGB(+1,+20,+20) (ΔE 0)
ColorValue	26,101 → 27,102	0.001332	ΔRGB(1,18,18)	fill recolour ΔRGB(+1,+18,+18) (ΔE 0)

source · cases/filters/r2-filter-url-feturbulence-displacement.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 feturbulence-displacement</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-20%" y="-20%" width="140%" height="140%"><feTurbulence type="turbulence" baseFrequency="0.08" numOctaves="1" seed="7" result="noise"/><feDisplacementMap in="SourceGraphic" in2="noise" scale="18" xChannelSelector="R" yChannelSelector="G"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

backdrop-filter — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.13% · raw 0.13% (469 px) r2-backdrop-filter-blur-stripes · backdrop-blurPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 4.8

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

backdrop-filter blur must sample content behind the element: A translucent panel overlays hard vertical stripes; backdrop-filter: blur(8px) should smear the stripes under the panel only. Catches wrong implementation: Renderer treats backdrop-filter as unsupported or applies normal filter to the panel itself.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	469	25,115 → 175,115	469	total 0.1% · largest 0.1%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	25,115 → 175,115	0.1	ΔRGB(-27,-26,-15)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-backdrop-filter-blur-stripes.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 backdrop filter blur stripes</title>
6<style>
7  @page { size: 240px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 240px; height: 150px; padding: 25px; background: repeating-linear-gradient(to right, #1a237e 0 14px, #ffeb3b 14px 28px); }
12  .panel { width: 150px; height: 90px; background: rgba(255,255,255,0.35); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="panel"></div></div>
17</body>
18</html>

color-interpolation-filters — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 15.98% (44940 px) r2-filter-color-interpolation-filters-srgb · color-interpolation-filters-srgbPASS via raw same-coordinate visibility policyColorValueΔE 0.4

why: fill recolour ΔRGB(-1,-1,-1) (ΔE 0.4)

color-interpolation-filters must switch SVG filter color space: Two identical muted boxes use feColorMatrix saturate(0); one filter defaults to linearRGB and one explicitly uses sRGB, producing different grays. Catches wrong implementation: Implementation ignores color-interpolation-filters and produces identical gray boxes.

regions (12 total; showing 12 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	12	44940	0,0 → 180,60	44743	total 41.9% · largest 41.7% · max ΔE 0.4

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	0,0 → 76,60	41.7	ΔE 0.4 ΔRGB(-1,-1,-1)	fill recolour ΔRGB(-1,-1,-1) (ΔE 0.4)
AntialiasCoverage	104,0 → 104,60	0.2	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,0 → 0,0	0.000932	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,0 → 76,0	0.000932	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,0 → 104,0	0.000932	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,0 → 180,0	0.000932	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,0 → 180,0	0.000932	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,60 → 180,60	0.000932	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,60 → 0,60	0.000932	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,60 → 76,60	0.000932	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,60 → 104,60	0.000932	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,60 → 180,60	0.000932	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-color-interpolation-filters-srgb.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 color interpolation filters srgb</title>
6<style>
7  @page { size: 240px 120px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { display: flex; gap: 28px; width: 240px; height: 120px; padding: 30px; background: #ffffff; }
13  .box { width: 76px; height: 60px; background: #b65a21; }
14  .linear { filter: url(#lin); }
15  .srgb { filter: url(#srgb); }
16</style>
17</head>
18<body>
19  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs>
20    <filter id="lin"><feColorMatrix type="saturate" values="0"/></filter>
21    <filter id="srgb" color-interpolation-filters="sRGB"><feColorMatrix type="saturate" values="0"/></filter>
22  </defs></svg>
23  <div class="stage"><div class="box linear"></div><div class="box srgb"></div></div>
24</body>
25</html>

filter compositing order with clip-path — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.005289% · raw 2.13% (6430 px) r2-filter-before-clip-path-order · filter-before-clip-pathPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.2

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter must be applied before clip-path: A blurred red square is clipped to a circle; the blur is first computed then the circular clip removes all outside-circle paint. Catches wrong implementation: Renderer clips first and then blurs, creating a red feather outside the circular clip.

regions (42 total; showing 42 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	42	6430	1,1 → 92,92	448	total 7.7% · largest 0.5% · max ΔE 0.2

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	85,22 → 86,70	0.5	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,85 → 70,86	0.5	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
ColorValue	88,28 → 90,64	0.5	ΔE 0.2 ΔRGB(0,-1,-1)	fill recolour ΔRGB(+0,-1,-1) (ΔE 0.2)
ColorValue	28,88 → 64,90	0.5	ΔE 0.2 ΔRGB(0,-1,-1)	fill recolour ΔRGB(+0,-1,-1) (ΔE 0.2)
ColorValue	86,24 → 87,68	0.5	ΔE 0.2	fill colour differs (ΔE 0.2)
ColorValue	24,86 → 68,87	0.5	ΔE 0.2	fill colour differs (ΔE 0.2)
ColorValue	90,32 → 92,60	0.4	ΔE 0.2 ΔRGB(0,-1,-1)	fill recolour ΔRGB(+0,-1,-1) (ΔE 0.2)
ColorValue	32,90 → 60,92	0.4	ΔE 0.2 ΔRGB(0,-1,-1)	fill recolour ΔRGB(+0,-1,-1) (ΔE 0.2)
AntialiasCoverage	84,20 → 84,72	0.4	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,84 → 72,84	0.4	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
ColorValue	82,18 → 83,75	0.2	ΔE 0.2 ΔRGB(1,0,0)	fill recolour ΔRGB(+1,+0,+0) (ΔE 0.2)
ColorValue	18,82 → 75,83	0.2	ΔE 0.2 ΔRGB(1,0,0)	fill recolour ΔRGB(+1,+0,+0) (ΔE 0.2)
ColorValue	18,10 → 75,10	0.2	ΔE 0.2 ΔRGB(1,0,0)	fill recolour ΔRGB(+1,+0,+0) (ΔE 0.2)
ColorValue	10,18 → 10,75	0.2	ΔE 0.2 ΔRGB(1,0,0)	fill recolour ΔRGB(+1,+0,+0) (ΔE 0.2)
AntialiasCoverage	20,8 → 72,8	0.2	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,20 → 8,72	0.2	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
ColorValue	22,7 → 70,7	0.2	ΔE 0.2 ΔRGB(0,1,1)	fill recolour ΔRGB(+0,+1,+1) (ΔE 0.2)
ColorValue	7,22 → 7,70	0.2	ΔE 0.2 ΔRGB(0,1,1)	fill recolour ΔRGB(+0,+1,+1) (ΔE 0.2)
AntialiasCoverage	24,6 → 68,6	0.2	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,24 → 6,68	0.2	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	88,26 → 88,66	0.1	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	26,88 → 66,88	0.1	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
ColorValue	28,4 → 64,4	0.1	ΔE 0.2 ΔRGB(1,0,0)	fill recolour ΔRGB(+1,+0,+0) (ΔE 0.2)
ColorValue	4,28 → 4,64	0.1	ΔE 0.2 ΔRGB(1,0,0)	fill recolour ΔRGB(+1,+0,+0) (ΔE 0.2)
AntialiasCoverage	29,3 → 62,3	0.1	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,29 → 3,62	0.1	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	40,1 → 53,1	0.05	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,40 → 1,53	0.05	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,41 → 92,51	0.04	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	41,92 → 51,92	0.04	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	39,1 → 39,1	0.001197	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	53,1 → 53,1	0.001197	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	26,4 → 26,4	0.001197	ΔRGB(2,9,9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,4 → 66,4	0.001197	ΔRGB(2,10,10)	antialiasing coverage residue on a shared outline
AntialiasCoverage	82,17 → 82,17	0.001197	ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	4,26 → 4,26	0.001197	ΔRGB(2,9,9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,39 → 1,39	0.001197	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,53 → 1,53	0.001197	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	4,66 → 4,66	0.001197	ΔRGB(2,10,10)	antialiasing coverage residue on a shared outline
AntialiasCoverage	82,75 → 82,75	0.001197	ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,82 → 17,82	0.001197	ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	75,82 → 75,82	0.001197	ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-before-clip-path-order.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter before clip path order</title>
6<style>
7  @page { size: 176px 176px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 170px; height: 170px; padding: 25px; background: #ffffff; }
12  .box { width: 120px; height: 120px; background: #d32f2f; filter: blur(10px); clip-path: circle(46px at 60px 60px); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="box"></div></div>
17</body>
18</html>

filter compositing order with mask-image — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.37% · raw 0.40% (1061 px) r2-filter-before-mask-image-order · filter-before-mask-imagePASS via CSS-scale observation: stable same-coordinate outline phaseExtramissing 0.4%extra 0.8%ΔE 0.2

why: visually accepted coverage phase; raw candidate adds paint absent from reference (0.8%)

filter must be applied before mask-image: A blurred red rectangle is masked by a hard half-plane gradient; blur is computed before the mask clips the right half. Catches wrong implementation: Renderer masks first and then blurs, bleeding red into the transparent half.

regions (63 total; showing 63 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
Extra	1	487	0,0 → 75,80	487	total 0.8% · largest 0.8%
ColorErr	61	323	0,0 → 75,80	251	total 0.5% · largest 0.4% · max ΔE 0.3
Missing	1	251	76,0 → 76,80	251	total 0.4% · largest 0.4%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
Extra	0,0 → 75,80	0.8		candidate adds paint absent from reference (0.8%)
Missing	76,0 → 76,80	0.4		candidate lacks paint present in reference (0.4%)
AntialiasCoverage	75,0 → 75,80	0.4	ΔRGB(22,104,104)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,75 → 13,75	0.008372	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,4 → 17,4	0.003349	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,5 → 14,5	0.003349	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,12 → 5,12	0.003349	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,15 → 9,15	0.003349	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,16 → 1,16	0.003349	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,65 → 9,65	0.003349	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,71 → 14,71	0.003349	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,72 → 16,72	0.003349	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,0 → 17,0	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,1 → 5,1	0.001674	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,4 → 16,4	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,4 → 2,4	0.001674	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,4 → 16,4	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,5 → 14,5	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,5 → 13,5	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,5 → 21,5	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,5 → 12,5	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,6 → 15,6	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,7 → 9,7	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,8 → 8,8	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,8 → 8,8	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,8 → 8,8	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,9 → 7,9	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,10 → 7,10	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,10 → 6,10	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,11 → 6,11	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,11 → 6,11	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,12 → 10,12	0.001674	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,12 → 1,12	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,13 → 5,13	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,15 → 6,15	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,17 → 0,17	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	4,17 → 4,17	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,18 → 1,18	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,18 → 8,18	0.001674	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,20 → 21,20	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,21 → 20,21	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,60 → 21,60	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,62 → 1,62	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,63 → 0,63	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	4,63 → 4,63	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,64 → 1,64	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,64 → 21,64	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,67 → 5,67	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,67 → 9,67	0.001674	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,68 → 1,68	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,68 → 5,68	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,70 → 6,70	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,70 → 7,70	0.001674	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,71 → 7,71	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,71 → 7,71	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,73 → 9,73	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,74 → 10,74	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,75 → 20,75	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,75 → 13,75	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,76 → 18,76	0.001674	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	1,76 → 1,76	0.001674	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,79 → 18,79	0.001674	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,80 → 8,80	0.001674	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-before-mask-image-order.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter before mask image order</title>
6<style>
7  @page { size: 200px 136px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 200px; height: 130px; padding: 25px; background: #ffffff; }
12  .box { width: 150px; height: 80px; background: #d32f2f; filter: blur(9px); mask-image: linear-gradient(to right, #000 0 50%, transparent 50% 100%); -webkit-mask-image: linear-gradient(to right, #000 0 50%, transparent 50% 100%); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="box"></div></div>
17</body>
18</html>

filter establishes stacking context — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.06% · raw 0.58% (1829 px) r2-filter-stacking-context-negative-z · filter-stacking-contextPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 3.1

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter-created stacking contexts must contain negative z-index descendants: A filtered parent contains a negative z-index child and sits on a gray page; the child cannot escape behind outside content. Catches wrong implementation: Renderer applies filter paint but does not create a stacking context, letting the child paint behind the page/sibling order incorrectly.

regions (2 total; showing 2 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	2	1829	15,5 → 150,92	1358	total 1.4% · largest 1.0% · max ΔE 3.1

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	15,6 → 150,92	1.0	ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,5 → 150,21	0.3	ΔE 3.1 ΔRGB(1,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-stacking-context-negative-z.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter stacking context negative z</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { position: relative; width: 220px; height: 140px; background: #ffffff; }
12  .sibling { position: absolute; top: 22px; left: 22px; width: 150px; height: 86px; background: #455a64; }
13  .filtered { position: absolute; top: 44px; left: 54px; width: 118px; height: 70px; filter: brightness(1); }
14  .neg { position: absolute; z-index: -1; top: -16px; left: -16px; width: 108px; height: 68px; background: #ffd600; }
15  .front { width: 118px; height: 70px; background: rgba(46,125,50,0.85); }
16</style>
17</head>
18<body>
19  <div class="stage"><div class="sibling"></div><div class="filtered"><div class="neg"></div><div class="front"></div></div></div>
20</body>
21</html>

filter value grammar with an invalid argument — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.24% (633 px) filter-invalid-argument-preserves-prior-filter · invalid-declaration-discardPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

A negative blur radius invalidates the later filter declaration, so the earlier filter:opacity(40%) continues to apply.

regions (2 total; showing 2 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	2	633	0,0 → 120,80	630	total 0.7% · largest 0.7% · max ΔE 0.3

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 120,80	0.7	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	120,80 → 120,80	0.003158	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-invalid-argument-preserves-prior-filter.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>invalid filter argument preserves prior filter</title>
6<style>
7  @page { size: 184px 144px; margin: 0; }
8  * { margin: 0; box-sizing: border-box; }
9  html, body { background: #ffffff; }
10  .target {
11    width: 120px;
12    height: 80px;
13    margin: 30px;
14    background: #c62828;
15    filter: opacity(40%);
16    filter: blur(-5px);
17  }
18</style>
19</head>
20<body><div class="target"></div></body>
21</html>

filter value grammar with an unknown function — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS exact match r2-filter-invalid-function-chain · unknown-function-invalidates-list

Invalid filter functions must invalidate the whole declaration: A red block has filter: blur(8px) bogus(1); the whole declaration is invalid so it remains crisp. Catches wrong implementation: Parser ignores bogus(1) and still applies blur(8px).

filter: blur() — 100.00% verified visual parity PASS 3 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.006500% (52 px) filter-blur-img · on-img-rasterPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

filter: blur() applied to an <img> raster; blur of image rasters is the implemented path.

regions (47 total; showing 47 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	47	52	2,4 → 176,175	2	total 0.02% · largest 0.000642% · max ΔE 0.7

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	166,16 → 166,17	0.000642	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	159,98 → 159,98	0.000642	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,159 → 17,159	0.000642	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,161 → 18,161	0.000642	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,161 → 19,162	0.000642	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,4 → 9,4	0.000321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,4 → 15,4	0.000321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,8 → 10,8	0.000321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,11 → 8,11	0.000321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	166,11 → 166,11	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	162,12 → 162,12	0.000321	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,14 → 2,14	0.000321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,18 → 11,18	0.000321	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	167,18 → 167,18	0.000321	ΔE 0.2 ΔRGB(-1,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,18 → 2,18	0.000321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,84 → 10,84	0.000321	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	172,84 → 172,84	0.000321	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,89 → 168,89	0.000321	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,89 → 168,89	0.000321	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,95 → 10,95	0.000321	ΔE 0.2 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	172,96 → 172,96	0.000321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	161,97 → 161,97	0.000321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,98 → 168,98	0.000321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	170,160 → 170,160	0.000321	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,161 → 2,161	0.000321	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	176,161 → 176,161	0.000321	ΔE 0.7 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,161 → 9,161	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,161 → 11,161	0.000321	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	167,161 → 167,161	0.000321	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,163 → 9,163	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	170,164 → 170,164	0.000321	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,164 → 2,164	0.000321	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	176,164 → 176,164	0.000321	ΔE 0.7 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,164 → 10,164	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,166 → 11,166	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,168 → 8,168	0.000321	ΔE 0.3 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	170,168 → 170,168	0.000321	ΔE 0.5 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,168 → 13,168	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,168 → 97,168	0.000321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,169 → 97,169	0.000321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,169 → 15,169	0.000321	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,170 → 10,170	0.000321	ΔE 0.3 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,170 → 168,170	0.000321	ΔE 0.5 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,174 → 15,174	0.000321	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	163,174 → 163,174	0.000321	ΔE 0.6 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,175 → 9,175	0.000321	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	169,175 → 169,175	0.000321	ΔE 0.7 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-blur-img.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter blur on img</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: blur(5px);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.006427% (57 px) filter-on-box-blur · on-box-vs-imgPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

filter: blur() on a bordered solid box: should soften both fill and border edge, contrasting with the img-raster blur path.

regions (45 total; showing 45 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	45	57	9,9 → 191,190	4	total 0.01% · largest 0.001044% · max ΔE 0.3

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	185,185 → 185,185	0.001044	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	187,18 → 188,19	0.000783	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	188,9 → 188,9	0.000522	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	190,12 → 190,12	0.000522	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	190,12 → 190,12	0.000522	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,184 → 19,185	0.000522	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	188,186 → 188,187	0.000522	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,187 → 9,188	0.000522	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,190 → 12,190	0.000522	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,14 → 16,14	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	189,14 → 189,14	0.000261	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	191,14 → 191,14	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,17 → 19,17	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	179,17 → 179,17	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,18 → 18,18	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,18 → 180,18	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,18 → 18,18	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,19 → 17,19	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	181,19 → 181,19	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,179 → 17,179	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	181,179 → 181,179	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	188,179 → 188,179	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	187,179 → 187,179	0.000261	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,179 → 18,179	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,180 → 180,180	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,180 → 18,180	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,180 → 19,180	0.000261	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	182,183 → 182,183	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	191,183 → 191,183	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	189,183 → 189,183	0.000261	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,184 → 17,184	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,184 → 18,184	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,184 → 180,184	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	181,184 → 181,184	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	191,184 → 191,184	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,184 → 180,184	0.000261	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,187 → 17,187	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,187 → 19,187	0.000261	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	179,187 → 179,187	0.000261	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	181,187 → 181,187	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	179,187 → 179,187	0.000261	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	186,188 → 186,188	0.000261	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	185,189 → 185,189	0.000261	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	179,190 → 179,190	0.000261	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	185,190 → 185,190	0.000261	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-on-box-blur.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter blur on box with border content</title>
6<style>
7  @page { size: 344px 264px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  /* Box with a thick border + solid fill: blur should soften BOTH the fill and
13     the border edge. ironpress only blurs background/image rasters, so the
14     bordered foreground edge is the discriminator vs filter-on-img. */
15  .box {
16    width: 180px;
17    height: 180px;
18    background-color: #ef6c00;
19    border: 12px solid #4a148c;
20    filter: blur(5px);
21  }
22</style>
23</head>
24<body>
25  <div class="frame"><div class="box"></div></div>
26</body>
27</html>

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.004190% (33 px) filter-blur-box · on-box-backgroundPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

filter: blur() applied to a box with a solid background-color fill.

regions (23 total; showing 23 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	23	33	3,4 → 217,152	5	total 0.009555% · largest 0.001448% · max ΔE 0.5

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	23,148 → 24,148	0.001448	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	196,148 → 197,148	0.001448	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,16 → 6,16	0.000579	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	213,16 → 213,16	0.000579	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,4 → 18,4	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,4 → 13,4	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	207,4 → 207,4	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,6 → 17,6	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	203,6 → 203,6	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,12 → 8,12	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	212,12 → 212,12	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,14 → 7,14	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	213,14 → 213,14	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,19 → 3,19	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	217,19 → 217,19	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,141 → 3,141	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	217,141 → 217,141	0.000290	ΔE 0.5 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,142 → 13,142	0.000290	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	207,142 → 207,142	0.000290	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,149 → 8,149	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	212,149 → 212,149	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,152 → 12,152	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	208,152 → 208,152	0.000290	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-blur-box.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter blur on box</title>
6<style>
7  @page { size: 360px 224px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  /* Padding so blurred edges stay on-page. */
12  .frame { padding: 40px; }
13  .box {
14    width: 200px;
15    height: 140px;
16    background-color: #1565c0;
17    filter: blur(6px);
18  }
19</style>
20</head>
21<body>
22  <div class="frame"><div class="box"></div></div>
23</body>
24</html>

filter: blur() on a container group — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 4.92% (22319 px) r2-filter-blur-group-descendants · blur-group-descendantsPASS via raw same-coordinate visibility policyColorValueΔE 0.3

why: fill recolour ΔRGB(-1,-1,+0) (ΔE 0.3)

blur() must apply to the whole element subtree: A container with a blue background, a yellow child, and text is blurred as one source graphic. Catches wrong implementation: Only the container background is blurred, leaving child paint and glyphs crisp.

regions (1206 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1206	22319	0,0 → 236,146	17787	total 6.6% · largest 5.2% · max ΔE 0.8

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	12,68 → 94,102	5.2	ΔE 0.3 ΔRGB(-1,-1,0)	fill recolour ΔRGB(-1,-1,+0) (ΔE 0.3)
AntialiasCoverage	7,144 → 222,144	0.2	ΔE 0.5 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,137 → 220,137	0.2	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	235,7 → 235,132	0.1	ΔE 0.8 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,74 → 9,96	0.02	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,76 → 10,93	0.02	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	29,99 → 34,101	0.01	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,79 → 12,91	0.01	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,93 → 94,96	0.009139	ΔE 0.4 ΔRGB(-1,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	61,76 → 62,83	0.007075	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
ColorValue	81,68 → 83,69	0.005601	ΔE 0.3 ΔRGB(-1,-1,0)	fill recolour ΔRGB(-1,-1,+0) (ΔE 0.3)
AntialiasCoverage	39,69 → 42,69	0.005307	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	88,92 → 90,94	0.005307	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	93,95 → 95,97	0.005307	ΔE 0.2	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,96 → 93,98	0.005307	ΔE 0.3	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,69 → 88,71	0.005012	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	65,86 → 67,87	0.005012	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,69 → 91,71	0.004717	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	36,68 → 38,69	0.004422	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,100 → 79,101	0.004422	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	82,99 → 83,101	0.004127	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,68 → 22,69	0.003833	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	56,75 → 57,77	0.003833	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,99 → 94,100	0.003833	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,100 → 76,102	0.003538	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,70 → 46,72	0.003243	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,76 → 52,79	0.003243	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	95,80 → 95,82	0.003243	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,81 → 66,84	0.003243	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	94,84 → 94,85	0.003243	ΔE 0.2	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,88 → 90,90	0.003243	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	72,99 → 74,100	0.003243	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,102 → 47,102	0.003243	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	69,70 → 69,72	0.002948	ΔE 0.2 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	56,71 → 57,73	0.002948	ΔE 0.2 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	93,92 → 94,92	0.002948	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,102 → 57,102	0.002948	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	222,146 → 225,146	0.002948	ΔE 0.5 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,70 → 14,72	0.002653	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	31,71 → 31,73	0.002653	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	58,71 → 58,73	0.002653	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	30,74 → 31,76	0.002653	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	65,81 → 65,84	0.002653	ΔE 0.4 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,90 → 92,91	0.002653	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,91 → 93,92	0.002653	ΔE 0.3	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,98 → 14,99	0.002653	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	50,100 → 51,101	0.002653	ΔE 0.2	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,103 → 26,103	0.002653	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	61,103 → 64,103	0.002653	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,146 → 7,146	0.002653	ΔE 0.5 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	44,68 → 44,70	0.002358	ΔE 0.2	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,71 → 10,73	0.002358	ΔE 0.1 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	93,72 → 94,73	0.002358	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	58,75 → 58,76	0.002358	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,76 → 12,78	0.002358	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	94,77 → 95,78	0.002358	ΔE 0.4	antialiasing coverage residue on a shared outline
AntialiasCoverage	53,79 → 53,81	0.002358	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	88,91 → 89,92	0.002358	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,91 → 12,93	0.002358	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,97 → 10,99	0.002358	ΔE 0.1 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	90,98 → 90,99	0.002358	ΔE 0.2	antialiasing coverage residue on a shared outline
AntialiasCoverage	236,4 → 236,6	0.002064	ΔE 0.8 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	50,70 → 50,72	0.002064	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,73 → 13,73	0.002064	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-blur-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter blur group descendants</title>
6<style>
7  @page { size: 264px 176px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 230px;
13    height: 140px;
14    padding: 16px;
15    background: #3949ab;
16    color: #ffffff;
17  }
18  .chip {
19    width: 86px;
20    height: 42px;
21    background: #ffca28;
22  }
23  .label {
24    margin-top: 10px;
25    font-size: 30px;
26    font-weight: 700;
27    line-height: 36px;
28  }
29  .group { filter: blur(4px); }
30</style>
31</head>
32<body>
33  <div class="group"><div class="chip"></div><div class="label">BLUR</div></div>
34</body>
35</html>

filter: blur() on text — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 4.43% (11621 px) r2-filter-blur-text-glyphs · text-glyph-blurPASS via raw same-coordinate visibility policyColorValueΔE 0.3

why: fill recolour ΔRGB(-1,-1,-1) (ΔE 0.3)

blur() on text glyphs needs raster/filter coverage: Large text with filter: blur(3px) should render as softened glyph shapes. Catches wrong implementation: Text remains vector-crisp while only surrounding box paint changes or no blur is applied.

regions (2177 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	2177	11621	0,0 → 142,53	1614	total 15.7% · largest 2.2% · max ΔE 0.8

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	38,9 → 45,45	2.2	ΔE 0.3 ΔRGB(1,1,1)	fill recolour ΔRGB(+1,+1,+1) (ΔE 0.3)
ColorValue	20,10 → 26,47	1.8	ΔE 0.4 ΔRGB(-1,-1,-1)	fill recolour ΔRGB(-1,-1,-1) (ΔE 0.4)
ColorValue	120,16 → 121,39	0.4	ΔE 0.3 ΔRGB(1,1,1)	fill recolour ΔRGB(+1,+1,+1) (ΔE 0.3)
AntialiasCoverage	117,13 → 119,45	0.4	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
ColorValue	64,4 → 70,13	0.3	ΔE 0.3 ΔRGB(-1,-1,-1)	fill recolour ΔRGB(-1,-1,-1) (ΔE 0.3)
AntialiasCoverage	94,13 → 99,26	0.3	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,16 → 20,42	0.2	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,16 → 17,42	0.2	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	122,18 → 123,40	0.2	ΔE 0.4 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,18 → 15,39	0.2	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	126,14 → 127,45	0.2	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	128,11 → 129,45	0.2	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	79,26 → 85,31	0.2	ΔE 0.4 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	28,14 → 28,44	0.1	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	41,4 → 45,9	0.1	ΔE 0.3 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	30,15 → 31,42	0.1	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,16 → 14,44	0.1	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,15 → 125,41	0.1	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	69,38 → 74,44	0.1	ΔE 0.3 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,14 → 95,17	0.1	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	119,18 → 119,42	0.1	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,18 → 116,40	0.10	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,18 → 18,40	0.09	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,21 → 68,26	0.09	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,12 → 88,18	0.06	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,21 → 95,24	0.06	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	101,11 → 104,13	0.06	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,13 → 87,18	0.06	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,22 → 64,26	0.05	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	65,20 → 67,26	0.05	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	71,23 → 72,27	0.04	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	81,11 → 84,13	0.04	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,9 → 64,12	0.04	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	78,26 → 81,28	0.04	ΔE 0.2 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	103,40 → 105,44	0.04	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,13 → 65,16	0.03	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	46,8 → 47,12	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	120,39 → 121,43	0.03	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	101,8 → 103,10	0.03	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,9 → 85,11	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	82,8 → 83,10	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,14 → 15,18	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,20 → 92,22	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	120,11 → 122,12	0.03	ΔE 0.3 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	95,12 → 98,13	0.03	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	64,26 → 67,27	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	95,43 → 97,44	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	75,38 → 76,40	0.03	ΔE 0.4 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	46,40 → 47,43	0.03	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	122,13 → 124,16	0.02	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	71,20 → 73,23	0.02	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,24 → 70,26	0.02	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,29 → 88,31	0.02	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
ColorValue	45,11 → 46,12	0.02	ΔE 0.3 ΔRGB(1,1,1)	fill recolour ΔRGB(+1,+1,+1) (ΔE 0.3)
AntialiasCoverage	86,33 → 87,35	0.02	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	96,36 → 98,38	0.02	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	90,25 → 91,27	0.02	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,36 → 92,38	0.02	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,39 → 15,43	0.02	ΔE 0.2 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	82,41 → 83,44	0.02	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	71,45 → 72,48	0.02	ΔE 0.3 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,6 → 64,7	0.02	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,17 → 92,19	0.02	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,22 → 59,22	0.02	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-blur-text-glyphs.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter blur text glyphs</title>
6<style>
7  @page { size: 240px 112px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .text { width: 240px; height: 110px; padding: 20px; color: #111111; font-size: 52px; font-weight: 700; line-height: 60px; filter: blur(3px); }
12</style>
13</head>
14<body>
15  <div class="text">TEXT</div>
16</body>
17</html>

filter: blur() visual overflow — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.09% (291 px) r2-filter-blur-visual-overflow-layout · visual-overflow-no-layoutPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

blur() visual overflow must paint outside the border box without moving layout: A blurred red square sits next to a green square; blur feathers extend left/right but the green square keeps its fixed position. Catches wrong implementation: Renderer clips the blur to the red border box or expands layout and shifts the green square.

regions (150 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	150	291	3,5 → 90,80	100	total 0.2% · largest 0.07% · max ΔE 0.4

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	90,27 → 90,59	0.07	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	27,9 → 29,9	0.004623	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	27,77 → 29,77	0.004623	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,9 → 68,9	0.003962	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,77 → 68,77	0.003962	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,5 → 25,5	0.001981	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,13 → 25,13	0.001981	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,27 → 19,28	0.001981	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,58 → 19,59	0.001981	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,72 → 25,72	0.001981	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,80 → 25,80	0.001981	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,5 → 70,5	0.001321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	83,13 → 83,13	0.001321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,17 → 70,18	0.001321	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,20 → 23,20	0.001321	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,66 → 23,66	0.001321	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,68 → 70,68	0.001321	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	83,72 → 83,72	0.001321	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,80 → 70,80	0.001321	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,5 → 24,5	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	71,5 → 71,5	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,6 → 21,6	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,6 → 74,6	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,6 → 76,6	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,6 → 18,6	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	78,7 → 78,7	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,8 → 70,8	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	29,9 → 29,9	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,9 → 66,9	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,9 → 76,9	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,10 → 20,10	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,10 → 17,10	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,10 → 18,10	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,11 → 24,11	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	71,11 → 71,11	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,13 → 18,13	0.000660	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,13 → 18,13	0.000660	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,13 → 24,13	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	71,13 → 71,13	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,14 → 22,14	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,15 → 84,15	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	75,16 → 75,16	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,16 → 84,16	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,17 → 12,17	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	72,17 → 72,17	0.000660	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,17 → 10,17	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,17 → 74,17	0.000660	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,18 → 89,18	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,18 → 9,18	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,18 → 19,18	0.000660	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,18 → 74,18	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,19 → 3,19	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,19 → 19,19	0.000660	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	27,19 → 27,19	0.000660	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	68,19 → 68,19	0.000660	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,19 → 86,19	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,19 → 89,19	0.000660	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,19 → 14,19	0.000660	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,19 → 19,19	0.000660	ΔE 0.3 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	83,19 → 83,19	0.000660	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,19 → 25,19	0.000660	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	70,19 → 70,19	0.000660	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,20 → 6,20	0.000660	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	83,20 → 83,20	0.000660	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-blur-visual-overflow-layout.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter blur visual overflow layout</title>
6<style>
7  @page { size: 264px 120px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .row { display: flex; gap: 28px; width: 260px; height: 120px; padding: 30px 24px; background: #ffffff; }
12  .red { width: 70px; height: 60px; background: #d32f2f; filter: blur(7px); }
13  .green { width: 70px; height: 60px; background: #2e7d32; }
14</style>
15</head>
16<body>
17  <div class="row"><div class="red"></div><div class="green"></div></div>
18</body>
19</html>

filter: brightness() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.13% (1008 px) filter-brightness · 1.6PASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.07

why: antialiasing coverage residue on a shared outline

filter: brightness(1.6) lightening a four-quadrant color image.

regions (4 total; showing 4 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	4	1008	0,0 → 160,160	1001	total 0.4% · largest 0.4% · max ΔE 0.2

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 160,160	0.4	ΔE 0.07 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,0 → 80,0	0.001195	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,80 → 0,80	0.001195	ΔRGB(1,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,0 → 0,0	0.000398	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-brightness.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter brightness</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: brightness(1.6);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: brightness() on a container group — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.31% · raw 0.32% (1236 px) r2-filter-brightness-group-descendants · brightness-group-descendantsPASS via CSS-scale observation: stable same-coordinate outline phaseAntialiasCoveragemissing 0.002376%extra 0.05%ΔE 9.0

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

brightness() must filter descendant text and child paint: A container with a solid background, child chip, and glyphs uses filter:brightness(180%); all descendants are part of the filtered source graphic. Catches wrong implementation: Implementation applies the color operation only to the box fill/image path and leaves descendants unfiltered.

regions (521 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	441	1073	18,73 → 209,97	73	total 0.3% · largest 0.02%
Extra	73	156	18,73 → 208,96	71	total 0.05% · largest 0.02%
Missing	7	7	29,74 → 206,97	1	total 0.002223% · largest 0.000318%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	39,73 → 39,96	0.02	ΔRGB(-57,-54,0)	antialiasing coverage residue on a shared outline
Extra	18,74 → 18,96	0.02		candidate adds paint absent from reference (0.02%)
ColorValue	119,77 → 119,96	0.02	ΔRGB(-56,-43,0)	fill recolour ΔRGB(-56,-43,+0) (ΔE 0)
AntialiasCoverage	123,77 → 123,96	0.02	ΔRGB(-50,-47,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	146,73 → 146,90	0.02	ΔRGB(-59,-54,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	137,80 → 137,96	0.02	ΔRGB(-20,-18,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,87 → 43,96	0.009209	ΔRGB(-30,-29,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	79,84 → 87,84	0.008891	ΔRGB(-25,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,77 → 43,83	0.006351	ΔRGB(-30,-29,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,82 → 27,82	0.005081	ΔRGB(-25,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	207,74 → 207,78	0.004763	ΔRGB(-18,-17,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,93 → 27,93	0.004763	ΔRGB(-25,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	173,91 → 173,95	0.004446	ΔRGB(-55,-53,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,77 → 26,77	0.004128	ΔRGB(-23,-22,0)	antialiasing coverage residue on a shared outline
ColorValue	170,82 → 170,86	0.003810	ΔRGB(-48,-43,0)	fill recolour ΔRGB(-48,-43,+0) (ΔE 0)
Extra	131,74 → 131,76	0.003175		candidate adds paint absent from reference (0.003175%)
AntialiasCoverage	180,73 → 183,73	0.003175	ΔRGB(-43,-40,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,77 → 46,77	0.003175	ΔRGB(-23,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,84 → 46,84	0.003175	ΔRGB(-25,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	199,73 → 202,73	0.002858	ΔRGB(-55,-51,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,79 → 22,81	0.002540	ΔRGB(-14,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	67,84 → 67,86	0.002540	ΔRGB(-16,-14,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	35,89 → 35,91	0.002223	ΔRGB(-5,-4,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	209,89 → 209,91	0.002223	ΔRGB(-25,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	78,73 → 79,73	0.001905	ΔRGB(-18,-15,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	173,78 → 173,80	0.001905	ΔRGB(-11,-9,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	30,79 → 30,80	0.001905	ΔRGB(-11,-3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	180,93 → 182,93	0.001905	ΔRGB(-25,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,90 → 22,91	0.001588	ΔRGB(-14,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	199,93 → 201,93	0.001588	ΔRGB(-25,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,97 → 78,97	0.001588	ΔRGB(-36,-33,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	79,97 → 81,97	0.001588	ΔRGB(3,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,73 → 48,73	0.001270	ΔRGB(-15,-14,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	177,79 → 177,80	0.001270	ΔRGB(-12,-11,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,80 → 54,81	0.001270	ΔRGB(-19,-18,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,88 → 22,89	0.001270	ΔRGB(-14,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	78,93 → 79,93	0.001270	ΔRGB(-29,-26,0)	antialiasing coverage residue on a shared outline
ColorValue	28,96 → 29,96	0.001270	ΔRGB(-23,-22,0)	fill recolour ΔRGB(-23,-22,+0) (ΔE 0)
AntialiasCoverage	179,97 → 180,97	0.001270	ΔRGB(-5,-4,0)	antialiasing coverage residue on a shared outline
ColorValue	182,97 → 183,97	0.001270	ΔRGB(-25,-24,0)	fill recolour ΔRGB(-25,-24,+0) (ΔE 0)
ColorValue	201,97 → 202,97	0.001270	ΔRGB(-27,-23,0)	fill recolour ΔRGB(-27,-23,+0) (ΔE 0)
ColorValue	28,73 → 28,73	0.000953	ΔRGB(-29,-23,0)	fill recolour ΔRGB(-29,-23,+0) (ΔE 0)
ColorValue	34,78 → 34,79	0.000953	ΔRGB(-32,-31,0)	fill recolour ΔRGB(-32,-31,+0) (ΔE 0)
ColorValue	34,80 → 34,80	0.000953	ΔRGB(-21,-20,0)	fill recolour ΔRGB(-21,-20,+0) (ΔE 0)
ColorValue	198,97 → 198,97	0.000953	ΔRGB(-20,-18,0)	fill recolour ΔRGB(-20,-18,+0) (ΔE 0)
Extra	27,77 → 27,77	0.000635		candidate adds paint absent from reference (0.000635%)
Extra	46,77 → 47,77	0.000635		candidate adds paint absent from reference (0.000635%)
Extra	34,79 → 34,79	0.000635		candidate adds paint absent from reference (0.000635%)
Extra	46,84 → 47,84	0.000635		candidate adds paint absent from reference (0.000635%)
AntialiasCoverage	82,73 → 82,73	0.000635	ΔRGB(4,4,0)	antialiasing coverage residue on a shared outline
ColorValue	197,73 → 198,73	0.000635	ΔRGB(-27,-25,0)	fill recolour ΔRGB(-27,-25,+0) (ΔE 0)
AntialiasCoverage	204,73 → 204,73	0.000635	ΔRGB(-29,-27,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,73 → 75,73	0.000635	ΔRGB(-9,-9,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	205,73 → 205,73	0.000635	ΔRGB(-30,-29,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	77,76 → 77,76	0.000635	ΔRGB(-23,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	183,76 → 184,76	0.000635	ΔRGB(21,20,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	199,76 → 199,76	0.000635	ΔRGB(-15,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	203,76 → 203,76	0.000635	ΔRGB(16,15,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	75,77 → 75,77	0.000635	ΔRGB(-5,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	173,77 → 173,77	0.000635	ΔRGB(3,2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,78 → 54,78	0.000635	ΔRGB(7,7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	196,78 → 196,78	0.000635	ΔRGB(-14,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	50,79 → 50,79	0.000635	ΔRGB(-1,-2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	72,81 → 72,81	0.000635	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-brightness-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 brightness group descendants</title>
6<style>
7  @page { size: 264px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 230px;
13    height: 140px;
14    padding: 16px;
15    background: #3949ab;
16    color: #ffffff;
17  }
18  .chip {
19    width: 86px;
20    height: 42px;
21    background: #ffca28;
22  }
23  .label {
24    margin-top: 10px;
25    font-size: 30px;
26    font-weight: 700;
27    line-height: 36px;
28  }
29  .group { filter: brightness(180%); }
30</style>
31</head>
32<body>
33  <div class="group"><div class="chip"></div><div class="label">BRIGHTNESS</div></div>
34</body>
35</html>

filter: chained — 100.00% verified visual parity PASS 2 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 4.41% (35303 px) filter-chained · blur-plus-brightnessPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

Chained filter functions blur(4px) brightness(1.5); parser matches only a single blur() so the chain is unsupported.

regions (1350 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1350	35303	0,0 → 175,175	1928	total 11.7% · largest 0.6% · max ΔE 1.0

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	17,17 → 95,158	0.6	ΔE 0.2 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,15 → 171,159	0.4	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,90 → 80,92	0.3	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
ColorValue	16,93 → 79,95	0.3	ΔE 0.3 ΔRGB(0,1,0)	fill recolour ΔRGB(+0,+1,+0) (ΔE 0.3)
AntialiasCoverage	13,1 → 162,3	0.3	ΔE 0.5 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	173,13 → 173,163	0.3	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,10 → 158,12	0.3	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,5 → 160,7	0.3	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	164,17 → 165,158	0.3	ΔE 0.1 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
ColorValue	5,93 → 8,161	0.3	ΔE 0.3 ΔRGB(0,-1,0)	fill recolour ΔRGB(+0,-1,+0) (ΔE 0.3)
ColorValue	15,168 → 80,169	0.3	ΔE 0.3 ΔRGB(0,-1,0)	fill recolour ΔRGB(+0,-1,+0) (ΔE 0.3)
ColorValue	16,85 → 81,87	0.3	ΔE 0.2 ΔRGB(0,1,0)	fill recolour ΔRGB(+0,+1,+0) (ΔE 0.2)
ColorValue	16,83 → 82,84	0.3	ΔE 0.2 ΔRGB(0,1,1)	fill recolour ΔRGB(+0,+1,+1) (ΔE 0.2)
ColorValue	162,16 → 164,80	0.3	ΔE 0.2 ΔRGB(0,1,0)	fill recolour ΔRGB(+0,+1,+0) (ΔE 0.2)
ColorValue	97,12 → 159,13	0.3	ΔE 0.2 ΔRGB(0,1,0)	fill recolour ΔRGB(+0,+1,+0) (ΔE 0.2)
AntialiasCoverage	17,8 → 161,10	0.2	ΔE 0.2 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	166,15 → 167,158	0.2	ΔE 0.2 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,94 → 10,160	0.2	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,166 → 80,167	0.2	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	174,12 → 175,91	0.2	ΔE 0.8 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,13 → 3,88	0.2	ΔE 0.4 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,14 → 158,15	0.2	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	161,17 → 162,158	0.2	ΔE 0.07 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,173 → 84,174	0.1	ΔE 0.5 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,0 → 161,0	0.1	ΔE 0.8 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,94 → 2,163	0.1	ΔE 0.5 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	93,173 → 162,173	0.1	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	79,95 → 81,159	0.1	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
ColorValue	15,95 → 16,159	0.1	ΔE 0.3 ΔRGB(0,1,0)	fill recolour ΔRGB(+0,+1,+0) (ΔE 0.3)
AntialiasCoverage	10,17 → 11,81	0.1	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	83,95 → 84,159	0.1	ΔE 0.1	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,95 → 11,158	0.1	ΔE 0.3 ΔRGB(1,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	90,95 → 90,158	0.1	ΔE 0.1 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,95 → 92,158	0.1	ΔE 0.09 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
ColorValue	16,160 → 78,160	0.1	ΔE 0.3 ΔRGB(0,1,0)	fill recolour ΔRGB(+0,+1,+0) (ΔE 0.3)
AntialiasCoverage	17,164 → 79,165	0.1	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	90,17 → 90,79	0.1	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,164 → 158,165	0.1	ΔE 0.09 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,17 → 92,78	0.1	ΔE 0.1 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	4,92 → 5,161	0.08	ΔE 0.6 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	171,14 → 172,83	0.07	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,93 → 15,159	0.07	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,81 → 82,82	0.07	ΔE 0.3 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,15 → 168,81	0.07	ΔE 0.2 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,16 → 7,82	0.07	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,17 → 10,81	0.07	ΔE 0.2 ΔRGB(0,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,171 → 78,171	0.07	ΔE 0.6 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	96,7 → 161,7	0.07	ΔE 0.2 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,95 → 84,158	0.07	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	94,93 → 94,158	0.07	ΔE 0.07 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,95 → 13,159	0.07	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,17 → 14,80	0.07	ΔE 0.2 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,4 → 160,4	0.07	ΔE 0.4 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,161 → 78,162	0.07	ΔE 0.3 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	96,167 → 159,167	0.07	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,162 → 78,163	0.07	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	96,169 → 158,169	0.06	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,5 → 159,5	0.06	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	85,97 → 85,158	0.06	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,84 → 158,84	0.06	ΔE 0.07 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,85 → 158,85	0.06	ΔE 0.08 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,88 → 78,88	0.06	ΔE 0.2 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,97 → 14,158	0.06	ΔE 0.09 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,161 → 158,161	0.06	ΔE 0.06 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-chained.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter chained blur + brightness</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: blur(4px) brightness(1.5);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.19% (702 px) filter-chain-order-contrast-blur · ordered-contrast-blurPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.2

why: antialiasing coverage residue on a shared outline

contrast(5) blur(8px) and blur(8px) contrast(5) process the same exact-size four-colour field in list order; catches implementations that reorder filter functions without coupling the assertion to replaced-image scaling.

regions (140 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	140	702	11,19 → 216,123	180	total 0.2% · largest 0.06% · max ΔE 0.8

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	37,34 → 94,34	0.06	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	37,49 → 94,49	0.06	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	133,49 → 190,49	0.06	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	101,24 → 102,24	0.000921	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	98,25 → 99,25	0.000921	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	96,49 → 97,49	0.000921	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	128,58 → 129,58	0.000921	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	101,59 → 102,59	0.000921	ΔE 0.2 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	125,59 → 125,59	0.000921	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,24 → 104,24	0.000614	ΔE 0.2 ΔRGB(1,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,32 → 16,32	0.000614	ΔE 0.3 ΔRGB(1,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,34 → 97,34	0.000614	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	32,34 → 32,34	0.000614	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	32,49 → 32,49	0.000614	ΔE 0.1 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	195,49 → 195,49	0.000614	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	130,49 → 130,49	0.000614	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,51 → 16,51	0.000614	ΔE 0.2 ΔRGB(1,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	211,51 → 211,51	0.000614	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,59 → 104,59	0.000614	ΔE 0.3 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	105,59 → 105,59	0.000614	ΔE 0.3 ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	123,59 → 123,59	0.000614	ΔE 0.2 ΔRGB(1,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	113,72 → 114,72	0.000614	ΔE 0.8 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,19 → 100,19	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	106,19 → 106,19	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,19 → 121,19	0.000307	ΔE 0.2 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,19 → 127,19	0.000307	ΔE 0.2 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	105,24 → 105,24	0.000307	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	107,24 → 107,24	0.000307	ΔE 0.3 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	108,24 → 108,24	0.000307	ΔE 0.4 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	108,24 → 108,24	0.000307	ΔE 0.4 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	109,24 → 109,24	0.000307	ΔE 0.5 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	111,24 → 111,24	0.000307	ΔE 0.5 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	113,24 → 113,24	0.000307	ΔE 0.4 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	114,24 → 114,24	0.000307	ΔE 0.3 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,24 → 116,24	0.000307	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	118,24 → 118,24	0.000307	ΔE 0.1 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	119,24 → 119,24	0.000307	ΔE 0.09 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	120,24 → 120,24	0.000307	ΔE 0.2 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	122,24 → 122,24	0.000307	ΔE 0.2 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	123,24 → 123,24	0.000307	ΔE 0.05 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	125,24 → 125,24	0.000307	ΔE 0.04 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,25 → 104,25	0.000307	ΔE 0.2 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,25 → 116,25	0.000307	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,25 → 127,25	0.000307	ΔE 0.2 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,25 → 24,25	0.000307	ΔE 0.3 ΔRGB(-1,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	203,25 → 203,25	0.000307	ΔE 0.06 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	28,27 → 28,27	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,28 → 20,28	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,29 → 22,29	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	111,29 → 111,29	0.000307	ΔE 0.5 ΔRGB(0,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,30 → 25,30	0.000307	ΔE 0.3 ΔRGB(1,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	202,30 → 202,30	0.000307	ΔE 0.04 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	31,31 → 31,31	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	103,31 → 103,31	0.000307	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,31 → 24,31	0.000307	ΔE 0.3 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	203,31 → 203,31	0.000307	ΔE 0.05 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,32 → 11,32	0.000307	ΔE 0.4 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,32 → 25,32	0.000307	ΔE 0.3 ΔRGB(0,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	202,32 → 202,32	0.000307	ΔE 0.04 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	211,32 → 211,32	0.000307	ΔE 0.1 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	216,32 → 216,32	0.000307	ΔE 0.2 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,33 → 24,33	0.000307	ΔE 0.3 ΔRGB(1,0,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	203,33 → 203,33	0.000307	ΔE 0.05 ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,34 → 121,34	0.000307	ΔE 0.2 ΔRGB(0,-1,0)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-chain-order-contrast-blur.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter chain order contrast blur</title>
6<style>
7  @page { size: 240px 160px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame {
12    width: 240px;
13    height: 160px;
14    padding: 24px;
15    background: #f5f5f5;
16  }
17  .sample {
18    position: relative;
19    display: block;
20    width: 192px;
21    height: 48px;
22  }
23  .sample > i {
24    position: absolute;
25    display: block;
26    width: 96px;
27    height: 24px;
28  }
29  .red { left: 0; top: 0; background: #ff0000; }
30  .green { right: 0; top: 0; background: #00ff00; }
31  .blue { left: 0; bottom: 0; background: #0000ff; }
32  .yellow { right: 0; bottom: 0; background: #ffff00; }
33  .a {
34    filter: contrast(5) blur(8px);
35  }
36  .b {
37    margin-top: 16px;
38    filter: blur(8px) contrast(5);
39  }
40</style>
41</head>
42<body>
43  <div class="frame">
44    <div class="sample a">
45      <i class="red"></i><i class="green"></i>
46      <i class="blue"></i><i class="yellow"></i>
47    </div>
48    <div class="sample b">
49      <i class="red"></i><i class="green"></i>
50      <i class="blue"></i><i class="yellow"></i>
51    </div>
52  </div>
53</body>
54</html>

filter: contrast() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.000375% · raw 0.25% (2000 px) filter-contrast · 2PASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.06

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter: contrast(2) increasing contrast of a four-quadrant color image.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	2000	0,0 → 160,160	2000	total 0.8% · largest 0.8% · max ΔE 0.06

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 160,160	0.8	ΔE 0.06 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-contrast.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter contrast</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: contrast(2);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: contrast() on a container group — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.47% · raw 0.48% (1900 px) r2-filter-contrast-group-descendants · contrast-group-descendantsPASS via CSS-scale observation: stable same-coordinate outline phaseAntialiasCoveragemissing 0.002001%extra 0.08%ΔE 8.8

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

contrast() must filter descendant text and child paint: A container with a solid background, child chip, and glyphs uses filter:contrast(220%); all descendants are part of the filtered source graphic. Catches wrong implementation: Implementation applies the color operation only to the box fill/image path and leaves descendants unfiltered.

regions (636 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	529	1651	17,73 → 179,97	231	total 0.5% · largest 0.07%
Missing	6	6	26,73 → 152,96	1	total 0.001905% · largest 0.000318%
Extra	101	243	17,73 → 172,96	71	total 0.08% · largest 0.02%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	82,73 → 102,96	0.07	ΔRGB(-30,-52,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	63,73 → 68,96	0.03	ΔRGB(-45,-66,-31)	antialiasing coverage residue on a shared outline
AntialiasCoverage	160,73 → 179,77	0.03	ΔRGB(-29,-26,0)	antialiasing coverage residue on a shared outline
Extra	104,74 → 104,96	0.02		candidate adds paint absent from reference (0.02%)
AntialiasCoverage	76,73 → 80,90	0.02	ΔRGB(-82,-74,0)	antialiasing coverage residue on a shared outline
Extra	172,77 → 172,96	0.02		candidate adds paint absent from reference (0.02%)
AntialiasCoverage	104,73 → 113,73	0.009526	ΔRGB(-29,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,91 → 135,91	0.008891	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	94,77 → 102,77	0.007621	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	172,77 → 179,77	0.007621	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	128,86 → 134,87	0.007621	ΔRGB(-31,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	76,96 → 80,96	0.005081	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	143,91 → 143,95	0.004763	ΔRGB(-41,-63,-29)	antialiasing coverage residue on a shared outline
AntialiasCoverage	148,97 → 153,97	0.004763	ΔRGB(-5,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	118,96 → 122,96	0.004446	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	26,97 → 30,97	0.004446	ΔRGB(4,2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	108,77 → 112,77	0.004128	ΔRGB(-29,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	108,84 → 112,84	0.004128	ΔRGB(-31,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,96 → 108,96	0.004128	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	168,96 → 172,96	0.004128	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,97 → 50,97	0.003493	ΔRGB(20,20,0)	antialiasing coverage residue on a shared outline
Extra	102,74 → 102,76	0.003175		candidate adds paint absent from reference (0.003175%)
AntialiasCoverage	149,73 → 152,73	0.003175	ΔRGB(-25,-48,-22)	antialiasing coverage residue on a shared outline
AntialiasCoverage	59,82 → 59,85	0.003175	ΔRGB(-16,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	149,93 → 152,93	0.003175	ΔRGB(-31,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,84 → 17,86	0.002858	ΔRGB(-13,-20,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,84 → 55,86	0.002858	ΔRGB(-24,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	108,87 → 110,87	0.002858	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	42,84 → 42,87	0.002540	ΔRGB(-24,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	48,93 → 50,93	0.002540	ΔRGB(-55,-49,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	147,78 → 147,80	0.002223	ΔRGB(-20,-18,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	28,93 → 29,93	0.002223	ΔRGB(-40,-33,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	143,78 → 143,80	0.001905	ΔRGB(-13,-11,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	115,79 → 115,81	0.001905	ΔRGB(-42,-37,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	38,82 → 38,84	0.001905	ΔRGB(-33,-30,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	28,73 → 29,73	0.001588	ΔRGB(-2,-9,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	119,78 → 119,80	0.001588	ΔRGB(-38,-35,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	119,81 → 119,82	0.001588	ΔRGB(-20,-18,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	59,86 → 59,87	0.001588	ΔRGB(-23,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	48,73 → 49,73	0.001270	ΔRGB(-18,-26,-11)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,81 → 55,82	0.001270	ΔRGB(-24,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	46,73 → 46,73	0.000953	ΔRGB(-24,-26,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	154,73 → 154,73	0.000953	ΔRGB(-31,-29,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	153,76 → 154,76	0.000953	ΔRGB(-5,-2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	118,77 → 118,78	0.000953	ΔRGB(4,20,0)	antialiasing coverage residue on a shared outline
ColorValue	131,79 → 131,79	0.000953	ΔRGB(-31,-29,0)	fill recolour ΔRGB(-31,-29,+0) (ΔE 0)
AntialiasCoverage	38,80 → 38,81	0.000953	ΔRGB(-46,-42,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	59,81 → 59,81	0.000953	ΔRGB(-24,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,81 → 17,82	0.000953	ΔRGB(-44,-40,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,81 → 43,82	0.000953	ΔRGB(-17,-16,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,82 → 21,83	0.000953	ΔRGB(0,2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	149,82 → 150,82	0.000953	ΔRGB(-8,-22,0)	antialiasing coverage residue on a shared outline
ColorValue	150,82 → 151,82	0.000953	ΔRGB(-13,-11,0)	fill recolour ΔRGB(-13,-11,+0) (ΔE 0)
AntialiasCoverage	152,83 → 153,83	0.000953	ΔRGB(0,7,0)	antialiasing coverage residue on a shared outline
ColorValue	153,83 → 154,83	0.000953	ΔRGB(29,27,0)	fill recolour ΔRGB(+29,+27,+0) (ΔE 0)
AntialiasCoverage	42,83 → 42,84	0.000953	ΔRGB(-55,-51,0)	antialiasing coverage residue on a shared outline
ColorValue	116,85 → 116,86	0.000953	ΔRGB(9,15,6)	fill recolour ΔRGB(+9,+15,+6) (ΔE 0)
AntialiasCoverage	149,86 → 149,86	0.000953	ΔRGB(-24,-22,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	150,86 → 151,86	0.000953	ΔRGB(-1,-2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,87 → 21,87	0.000953	ΔRGB(-35,-33,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	38,87 → 38,87	0.000953	ΔRGB(-27,-24,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,87 → 55,88	0.000953	ΔRGB(-31,-28,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,88 → 17,88	0.000953	ΔRGB(-15,-13,0)	antialiasing coverage residue on a shared outline
ColorValue	43,88 → 43,88	0.000953	ΔRGB(-24,-22,0)	fill recolour ΔRGB(-24,-22,+0) (ΔE 0)

source · cases/filters/r2-filter-contrast-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 contrast group descendants</title>
6<style>
7  @page { size: 264px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 230px;
13    height: 140px;
14    padding: 16px;
15    background: #3949ab;
16    color: #ffffff;
17  }
18  .chip {
19    width: 86px;
20    height: 42px;
21    background: #ffca28;
22  }
23  .label {
24    margin-top: 10px;
25    font-size: 30px;
26    font-weight: 700;
27    line-height: 36px;
28  }
29  .group { filter: contrast(220%); }
30</style>
31</head>
32<body>
33  <div class="group"><div class="chip"></div><div class="label">CONTRAST</div></div>
34</body>
35</html>

filter: drop-shadow() — 100.00% verified visual parity PASS 2 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.99% · raw 0.99% (1928 px) filter-drop-shadow-currentcolor · default-currentcolorPASS via CSS-scale observation: stable same-coordinate outline phaseColorValuemissing 0.9%extra 0.8%ΔE 10.6

why: visually accepted coverage phase; raw fill recolour ΔRGB(-14,-10,-10) (ΔE 10.6)

drop-shadow() without a color uses currentColor for the shadow; catches parsers that default the omitted color to black.

regions (137 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
Extra	69	243	0,0 → 109,53	7	total 0.4% · largest 0.01%
ColorErr	1	1392	0,0 → 112,56	1392	total 2.2% · largest 2.2%
Missing	67	293	1,1 → 112,56	13	total 0.5% · largest 0.02%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	0,0 → 112,56	2.2	ΔRGB(-14,-10,-10)	fill recolour ΔRGB(-14,-10,-10) (ΔE 0)
Missing	53,29 → 55,31	0.02		candidate lacks paint present in reference (0.02%)
Missing	109,29 → 111,31	0.02		candidate lacks paint present in reference (0.02%)
Missing	45,37 → 47,39	0.02		candidate lacks paint present in reference (0.02%)
Missing	101,37 → 103,39	0.02		candidate lacks paint present in reference (0.02%)
Missing	37,45 → 39,47	0.02		candidate lacks paint present in reference (0.02%)
Missing	93,45 → 95,47	0.02		candidate lacks paint present in reference (0.02%)
Missing	29,53 → 31,55	0.02		candidate lacks paint present in reference (0.02%)
Missing	85,53 → 87,55	0.02		candidate lacks paint present in reference (0.02%)
Missing	112,27 → 112,29	0.01		candidate lacks paint present in reference (0.01%)
Missing	27,56 → 29,56	0.01		candidate lacks paint present in reference (0.01%)
Missing	83,56 → 85,56	0.01		candidate lacks paint present in reference (0.01%)
Extra	27,0 → 29,0	0.01		candidate adds paint absent from reference (0.01%)
Extra	83,0 → 85,0	0.01		candidate adds paint absent from reference (0.01%)
Extra	21,5 → 22,6	0.01		candidate adds paint absent from reference (0.01%)
Extra	77,5 → 78,6	0.01		candidate adds paint absent from reference (0.01%)
Extra	13,13 → 14,14	0.01		candidate adds paint absent from reference (0.01%)
Extra	69,13 → 70,14	0.01		candidate adds paint absent from reference (0.01%)
Extra	5,21 → 6,22	0.01		candidate adds paint absent from reference (0.01%)
Extra	61,21 → 62,22	0.01		candidate adds paint absent from reference (0.01%)
Extra	0,27 → 0,29	0.01		candidate adds paint absent from reference (0.01%)
Missing	30,1 → 30,2	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	86,1 → 86,2	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	31,2 → 31,3	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	87,2 → 87,3	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	32,3 → 32,4	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	88,3 → 88,4	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	38,9 → 38,10	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	94,9 → 94,10	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	39,10 → 39,11	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	95,10 → 95,11	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	40,11 → 40,12	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	96,11 → 96,12	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	46,17 → 46,18	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	102,17 → 102,18	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	47,18 → 47,19	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	103,18 → 103,19	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	48,19 → 48,20	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	104,19 → 104,20	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	54,25 → 54,26	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	110,25 → 110,26	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	55,26 → 55,27	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	111,26 → 111,27	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	1,30 → 2,30	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	57,30 → 58,30	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	2,31 → 3,31	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	58,31 → 59,31	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	3,32 → 4,32	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	52,32 → 53,32	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	59,32 → 60,32	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	108,32 → 109,32	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	48,36 → 48,37	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	104,36 → 104,37	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	9,38 → 10,38	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	65,38 → 66,38	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	10,39 → 11,39	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	66,39 → 67,39	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	11,40 → 12,40	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	44,40 → 45,40	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	67,40 → 68,40	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	100,40 → 101,40	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	40,44 → 40,45	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	96,44 → 96,45	0.004815		candidate lacks paint present in reference (0.004815%)
Missing	17,46 → 18,46	0.004815		candidate lacks paint present in reference (0.004815%)

source · cases/filters/filter-drop-shadow-currentcolor.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter drop-shadow currentColor</title>
6<style>
7  @page { size: 192px 104px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame {
12    width: 190px;
13    height: 100px;
14    padding: 18px;
15    color: #00897b;
16    background: #ffffff;
17  }
18  img {
19    width: 64px;
20    height: 64px;
21    image-rendering: pixelated;
22    filter: drop-shadow(56px 0 0);
23  }
24</style>
25</head>
26<body>
27  <div class="frame"><img alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAA6UlEQVR42u2a2QmAMBAFtxz7r8deFH8F0ZhjjzcDFjADapKNGQCAE/u2HdcjLS8Z4S4vFeFJXiLCm3zpCF/lS0ZolS8V4a98iQi98qkjjJJPGWG0fKoIs+RTRJgtHzrCKvmQEVbLh4rgJR8igre8a4Qo8i4RoskvjRBVfkmE6PJTI2SRnxIhm/zQCFnlh0TILt8VoYr8rwjV5JsiVJX/HEE+gPwrwEeQ3yALIZbCbIbYDnMgwpEYh6IcizMYYTTGcJTxOBckuCLDJakAESwz0vK9EawS0vKtEawy0vJvEUwJafl7BAMAcOIE8NvBjJwtM6wAAAAASUVORK5CYII="></div>
28</body>
29</html>

PASS visually equivalent · no rejecting defect · thresholded evidence 0.37% · raw 0.62% (5489 px) filter-drop-shadow · alpha-diamond-hardPASS via CSS-scale observation: stable same-coordinate outline phaseColorValuemissing 0.1%extra 0.1%ΔE 2.1

why: visually accepted coverage phase; raw fill recolour ΔRGB(-2,-1,-1) (ΔE 2.1)

filter: drop-shadow() casting a hard offset shadow that traces a non-rectangular (diamond) image alpha, not its bounding box.

regions (70 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	32	5167	0,0 → 160,160	3757	total 2.1% · largest 1.5% · max ΔE 2.8
Extra	20	172	2,2 → 143,143	11	total 0.07% · largest 0.004365%
Missing	18	150	17,17 → 158,158	10	total 0.06% · largest 0.003968%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	0,0 → 160,160	1.5	ΔE 1.9 ΔRGB(-2,-1,-1)	fill recolour ΔRGB(-2,-1,-1) (ΔE 1.9)
AntialiasCoverage	92,92 → 160,160	0.4	ΔE 2.8 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
ColorValue	120,87 → 123,90	0.02	ΔRGB(-27,5,5)	fill recolour ΔRGB(-27,+5,+5) (ΔE 0)
ColorValue	87,120 → 90,123	0.02	ΔRGB(-27,5,5)	fill recolour ΔRGB(-27,+5,+5) (ΔE 0)
AntialiasCoverage	80,127 → 83,130	0.02	ΔRGB(-35,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,80 → 130,83	0.02	ΔRGB(-35,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	112,97 → 115,98	0.01	ΔRGB(-22,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	72,137 → 75,138	0.01	ΔRGB(-15,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	137,72 → 138,75	0.01	ΔRGB(-15,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,112 → 98,115	0.01	ΔRGB(-22,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	117,92 → 118,93	0.005952	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	160,88 → 160,92	0.005555	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,117 → 93,118	0.005555	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	88,160 → 92,160	0.005555	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	77,132 → 78,133	0.004762	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
Extra	70,140 → 70,143	0.004365		candidate adds paint absent from reference (0.004365%)
AntialiasCoverage	132,77 → 133,78	0.004365	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
Missing	110,37 → 110,40	0.003968		candidate lacks paint present in reference (0.003968%)
Missing	150,100 → 150,103	0.003968		candidate lacks paint present in reference (0.003968%)
Missing	37,110 → 40,110	0.003968		candidate lacks paint present in reference (0.003968%)
Missing	140,110 → 143,110	0.003968		candidate lacks paint present in reference (0.003968%)
Missing	110,140 → 110,143	0.003968		candidate lacks paint present in reference (0.003968%)
Missing	100,150 → 103,150	0.003968		candidate lacks paint present in reference (0.003968%)
Extra	57,10 → 60,10	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	80,10 → 83,10	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	50,17 → 50,20	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	100,30 → 103,30	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	17,50 → 20,50	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	10,57 → 10,60	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	140,70 → 143,70	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	10,80 → 10,83	0.003968		candidate adds paint absent from reference (0.003968%)
Extra	30,100 → 30,103	0.003968		candidate adds paint absent from reference (0.003968%)
AntialiasCoverage	108,102 → 108,103	0.003968	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	102,107 → 103,108	0.003968	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
Missing	90,17 → 90,20	0.003571		candidate lacks paint present in reference (0.003571%)
Missing	150,77 → 150,80	0.003571		candidate lacks paint present in reference (0.003571%)
Missing	17,90 → 20,90	0.003571		candidate lacks paint present in reference (0.003571%)
Missing	77,150 → 80,150	0.003571		candidate lacks paint present in reference (0.003571%)
AntialiasCoverage	73,143 → 73,145	0.003571	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
Extra	93,22 → 95,22	0.003175		candidate adds paint absent from reference (0.003175%)
AntialiasCoverage	144,73 → 145,73	0.003175	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
Missing	118,45 → 118,47	0.002778		candidate lacks paint present in reference (0.002778%)
Missing	158,93 → 158,95	0.002778		candidate lacks paint present in reference (0.002778%)
Missing	45,118 → 47,118	0.002778		candidate lacks paint present in reference (0.002778%)
Missing	133,118 → 135,118	0.002778		candidate lacks paint present in reference (0.002778%)
Missing	118,133 → 118,135	0.002778		candidate lacks paint present in reference (0.002778%)
Missing	93,158 → 95,158	0.002778		candidate lacks paint present in reference (0.002778%)
Extra	65,2 → 67,2	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	73,2 → 75,2	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	42,25 → 42,27	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	25,42 → 27,42	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	133,62 → 135,62	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	2,65 → 2,67	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	2,73 → 2,75	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	22,93 → 22,95	0.002778		candidate adds paint absent from reference (0.002778%)
Extra	62,133 → 62,135	0.002778		candidate adds paint absent from reference (0.002778%)
Missing	158,85 → 158,87	0.002381		candidate lacks paint present in reference (0.002381%)
Missing	85,158 → 87,158	0.002381		candidate lacks paint present in reference (0.002381%)
AntialiasCoverage	157,93 → 157,95	0.002381	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	133,117 → 135,117	0.001984	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,123 → 127,124	0.001984	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	117,133 → 117,135	0.001984	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	81,152 → 82,152	0.001984	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	93,157 → 95,157	0.001984	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-drop-shadow.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter drop-shadow on alpha image</title>
6<style>
7  @page { size: 344px 264px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  /* Padding so the offset drop-shadow stays on-page. */
12  .frame { padding: 40px; }
13  img.t {
14    width: 160px;
15    height: 160px;
16    image-rendering: pixelated;
17    /* zero blur -> hard-edged shadow tracing the diamond alpha, not its box */
18    filter: drop-shadow(20px 20px 0 #424242);
19  }
20</style>
21</head>
22<body>
23  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAA6UlEQVR42u2a2QmAMBAFtxz7r8deFH8F0ZhjjzcDFjADapKNGQCAE/u2HdcjLS8Z4S4vFeFJXiLCm3zpCF/lS0ZolS8V4a98iQi98qkjjJJPGWG0fKoIs+RTRJgtHzrCKvmQEVbLh4rgJR8igre8a4Qo8i4RoskvjRBVfkmE6PJTI2SRnxIhm/zQCFnlh0TILt8VoYr8rwjV5JsiVJX/HEE+gPwrwEeQ3yALIZbCbIbYDnMgwpEYh6IcizMYYTTGcJTxOBckuCLDJakAESwz0vK9EawS0vKtEawy0vJvEUwJafl7BAMAcOIE8NvBjJwtM6wAAAAASUVORK5CYII="></div>
24</body>
25</html>

filter: drop-shadow() followed by brightness() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.20% · raw 0.42% (1133 px) r2-filter-drop-shadow-chain-position · drop-shadow-before-brightnessPASS via CSS-scale observation: coherent sub-authored colour frontierColorValueΔE 0.8

why: visually accepted coverage phase; raw fill recolour ΔRGB(-2,-2,-2) (ΔE 0.8)

drop-shadow() must obey authored chain position: A dark drop shadow is followed by brightness(2); the shadow itself should be brightened because later filter functions consume the prior output. Catches wrong implementation: Renderer always applies color functions to the source before computing drop-shadow, leaving the shadow dark.

regions (2 total; showing 2 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	2	1133	0,0 → 153,50	754	total 1.5% · largest 1.0% · max ΔE 0.8

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	0,0 → 70,50	1.0	ΔE 0.8 ΔRGB(-2,-2,-1)	fill recolour ΔRGB(-2,-2,-1) (ΔE 0.8)
AntialiasCoverage	82,0 → 153,50	0.5	ΔE 0.7 ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-drop-shadow-chain-position.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter drop shadow chain position</title>
6<style>
7  @page { size: 232px 120px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 230px; height: 120px; padding: 30px; background: #ffffff; }
12  .box { width: 70px; height: 50px; background: #ffca28; filter: drop-shadow(82px 0 0 #303030) brightness(2); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="box"></div></div>
17</body>
18</html>

filter: drop-shadow() on rounded CSS box alpha — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.96% · raw 1.16% (3642 px) r2-filter-drop-shadow-rounded-css-alpha · rounded-css-alphaPASS via CSS-scale observation: stable same-coordinate outline phaseAntialiasCoveragemissing 0.8%extra 0.05%ΔE 10.4

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

drop-shadow() on CSS boxes follows the alpha shape, not a rectangular box-shadow: A circular red element casts a zero-blur drop-shadow; the shadow should be circular because it is based on source alpha. Catches wrong implementation: Implementation treats it like a rectangular box-shadow or only supports drop-shadow on replaced images.

regions (497 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	163	2782	0,0 → 156,80	1269	total 2.3% · largest 1.0%
Missing	294	810	0,0 → 156,79	83	total 0.7% · largest 0.07%
Extra	40	50	34,54 → 129,80	4	total 0.04% · largest 0.003239%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	15,6 → 116,80	1.0	ΔRGB(-1,-5,-5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,15 → 156,80	0.5	ΔRGB(-8,-8,-8)	antialiasing coverage residue on a shared outline
Missing	6,6 → 19,19	0.07		candidate lacks paint present in reference (0.07%)
AntialiasCoverage	23,0 → 43,4	0.07	ΔRGB(18,85,85)	antialiasing coverage residue on a shared outline
AntialiasCoverage	134,5 → 147,15	0.06	ΔRGB(13,13,13)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,29 → 2,48	0.06	ΔRGB(22,104,104)	antialiasing coverage residue on a shared outline
Missing	79,14 → 86,26	0.05		candidate lacks paint present in reference (0.05%)
AntialiasCoverage	4,56 → 8,64	0.04	ΔRGB(4,14,14)	antialiasing coverage residue on a shared outline
AntialiasCoverage	10,66 → 14,71	0.04	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	56,3 → 60,6	0.03	ΔRGB(2,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,22 → 5,29	0.03	ΔRGB(16,71,71)	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,10 → 90,14	0.02	ΔRGB(24,24,24)	antialiasing coverage residue on a shared outline
AntialiasCoverage	51,2 → 55,4	0.02	ΔRGB(6,34,34)	antialiasing coverage residue on a shared outline
Missing	86,10 → 90,14	0.02		candidate lacks paint present in reference (0.02%)
AntialiasCoverage	2,52 → 4,55	0.02	ΔRGB(7,35,35)	antialiasing coverage residue on a shared outline
AntialiasCoverage	114,0 → 119,0	0.01	ΔRGB(164,164,164)	antialiasing coverage residue on a shared outline
AntialiasCoverage	44,1 → 48,1	0.01	ΔRGB(18,87,87)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,1 → 128,2	0.01	ΔRGB(77,77,77)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,18 → 7,21	0.01	ΔRGB(12,54,54)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,15 → 86,17	0.01	ΔRGB(36,36,36)	antialiasing coverage residue on a shared outline
Missing	4,20 → 6,22	0.01		candidate lacks paint present in reference (0.01%)
Missing	22,3 → 25,4	0.009718		candidate lacks paint present in reference (0.009718%)
Missing	93,6 → 95,7	0.009718		candidate lacks paint present in reference (0.009718%)
Missing	3,22 → 4,25	0.009718		candidate lacks paint present in reference (0.009718%)
AntialiasCoverage	18,6 → 20,7	0.009718	ΔRGB(18,86,86)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,7 → 94,8	0.008908	ΔRGB(46,46,46)	antialiasing coverage residue on a shared outline
Missing	39,0 → 42,0	0.008098		candidate lacks paint present in reference (0.008098%)
Missing	115,0 → 118,0	0.008098		candidate lacks paint present in reference (0.008098%)
Missing	35,0 → 38,0	0.008098		candidate lacks paint present in reference (0.008098%)
Missing	20,4 → 22,5	0.008098		candidate lacks paint present in reference (0.008098%)
Missing	90,9 → 92,10	0.008098		candidate lacks paint present in reference (0.008098%)
Missing	0,35 → 0,38	0.008098		candidate lacks paint present in reference (0.008098%)
AntialiasCoverage	102,2 → 105,3	0.008098	ΔRGB(100,100,100)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,4 → 99,5	0.008098	ΔRGB(62,62,62)	antialiasing coverage residue on a shared outline
AntialiasCoverage	14,9 → 15,11	0.008098	ΔRGB(19,88,88)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,14 → 11,15	0.008098	ΔRGB(19,88,88)	antialiasing coverage residue on a shared outline
Missing	111,0 → 114,0	0.007289		candidate lacks paint present in reference (0.007289%)
Missing	119,0 → 122,0	0.007289		candidate lacks paint present in reference (0.007289%)
Missing	0,39 → 0,42	0.007289		candidate lacks paint present in reference (0.007289%)
Missing	43,0 → 45,0	0.006479		candidate lacks paint present in reference (0.006479%)
Missing	28,2 → 30,2	0.006479		candidate lacks paint present in reference (0.006479%)
Missing	2,28 → 2,30	0.006479		candidate lacks paint present in reference (0.006479%)
Missing	0,43 → 0,45	0.006479		candidate lacks paint present in reference (0.006479%)
AntialiasCoverage	120,1 → 122,1	0.006479	ΔRGB(120,120,120)	antialiasing coverage residue on a shared outline
AntialiasCoverage	132,4 → 134,4	0.006479	ΔRGB(29,29,29)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,9 → 92,10	0.006479	ΔRGB(70,70,70)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,65 → 9,66	0.006479	ΔRGB(9,41,41)	antialiasing coverage residue on a shared outline
Missing	96,5 → 97,6	0.005669		candidate lacks paint present in reference (0.005669%)
AntialiasCoverage	128,2 → 130,3	0.005669	ΔRGB(58,58,58)	antialiasing coverage residue on a shared outline
AntialiasCoverage	130,3 → 131,3	0.005669	ΔRGB(14,14,14)	antialiasing coverage residue on a shared outline
AntialiasCoverage	95,6 → 97,6	0.005669	ΔRGB(12,12,12)	antialiasing coverage residue on a shared outline
Missing	33,1 → 35,1	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	109,1 → 111,1	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	26,2 → 28,3	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	101,3 → 103,3	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	100,3 → 101,4	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	92,8 → 93,8	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	144,11 → 145,12	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	145,12 → 146,13	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	2,26 → 3,28	0.004859		candidate lacks paint present in reference (0.004859%)
Missing	1,33 → 1,35	0.004859		candidate lacks paint present in reference (0.004859%)
AntialiasCoverage	111,1 → 113,1	0.004859	ΔRGB(122,122,122)	antialiasing coverage residue on a shared outline
AntialiasCoverage	123,1 → 124,1	0.004859	ΔRGB(106,106,106)	antialiasing coverage residue on a shared outline
AntialiasCoverage	99,4 → 100,4	0.004859	ΔRGB(90,90,90)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-drop-shadow-rounded-css-alpha.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter drop shadow rounded css alpha</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 220px; height: 140px; padding: 30px; background: #ffffff; }
12  .ball { width: 80px; height: 80px; border-radius: 50%; background: #d32f2f; filter: drop-shadow(76px 0 0 #424242); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="ball"></div></div>
17</body>
18</html>

filter: drop-shadow(<color> <length>{2,3}) — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.82% · raw 1.32% (3240 px) r2-filter-drop-shadow-color-first · drop-shadow-color-firstPASS via CSS-scale observation: sub-CSS shared-outline coverageAntialiasCoveragemissing 1.0%ΔE 2.4

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

drop-shadow() accepts color before the lengths: The color token appears first in drop-shadow(#00695c 36px 0 0); grammar allows color and lengths in any order. Catches wrong implementation: Parser only accepts color after the lengths and drops the authored teal shadow.

regions (4 total; showing 4 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
Missing	2	816	0,0 → 158,60	408	total 0.9% · largest 0.4%
ColorErr	2	2424	0,0 → 158,60	1212	total 2.6% · largest 1.3%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 70,60	1.3	ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	88,0 → 158,60	1.3	ΔRGB(-2,-1,-1)	antialiasing coverage residue on a shared outline
Missing	0,0 → 70,60	0.4		candidate lacks paint present in reference (0.4%)
Missing	88,0 → 158,60	0.4		candidate lacks paint present in reference (0.4%)

source · cases/filters/r2-filter-drop-shadow-color-first.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 filter drop shadow color first</title>
6<style>
7  @page { size: 224px 112px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 220px; height: 110px; padding: 25px; background: #ffffff; }
12  .box { width: 70px; height: 60px; background: #ffca28; filter: drop-shadow(#00695c 88px 0 0); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="box"></div></div>
17</body>
18</html>

filter: grayscale() — 100.00% verified visual parity PASS 2 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.43% · raw 0.50% (1951 px) filter-grayscale-group-descendants · group-descendantsPASS via CSS-scale observation: stable same-coordinate outline phaseAntialiasCoveragemissing 0.02%extra 0.02%ΔE 3.3

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter: grayscale(1) applies to a parent source graphic including colored text and a child box; catches implementations that recolor only the parent background or ignore descendants.

regions (321 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	282	1911	2,0 → 125,28	173	total 1.2% · largest 0.1%
Missing	19	20	14,0 → 113,28	2	total 0.01% · largest 0.001263%
Extra	20	20	9,1 → 120,27	1	total 0.01% · largest 0.000632%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	56,0 → 61,28	0.1	ΔRGB(-8,-8,-8)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,0 → 108,28	0.09	ΔRGB(-8,-8,-8)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,8 → 7,17	0.02	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	51,8 → 52,17	0.02	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	108,4 → 108,12	0.02	ΔRGB(-21,-21,-21)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,2 → 24,8	0.02	ΔRGB(-9,-9,-9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,15 → 94,21	0.02	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	122,21 → 125,26	0.02	ΔRGB(-5,-5,-5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,5 → 122,12	0.02	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	27,6 → 28,12	0.01	ΔRGB(5,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,2 → 49,4	0.01	ΔRGB(-12,-12,-12)	antialiasing coverage residue on a shared outline
AntialiasCoverage	27,18 → 29,23	0.01	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	6,1 → 10,3	0.01	ΔRGB(17,17,17)	antialiasing coverage residue on a shared outline
AntialiasCoverage	50,18 → 52,22	0.01	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,0 → 18,0	0.01	ΔRGB(22,22,22)	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,20 → 24,26	0.01	ΔRGB(-9,-9,-9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	120,27 → 125,28	0.01	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,8 → 75,13	0.01	ΔRGB(5,5,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,13 → 47,18	0.01	ΔRGB(3,3,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,12 → 2,17	0.01	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,28 → 17,28	0.01	ΔRGB(-9,-9,-9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	37,0 → 42,0	0.01	ΔRGB(-7,-7,-7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	33,20 → 35,23	0.01	ΔRGB(-14,-14,-14)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,25 → 95,27	0.01	ΔRGB(-10,-10,-10)	antialiasing coverage residue on a shared outline
AntialiasCoverage	75,4 → 77,7	0.009475	ΔRGB(13,13,13)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,6 → 82,8	0.009475	ΔRGB(-6,-6,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,7 → 94,10	0.009475	ΔRGB(-6,-6,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,24 → 49,26	0.009475	ΔRGB(-13,-13,-13)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,28 → 89,28	0.009475	ΔRGB(-4,-4,-4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	114,17 → 116,19	0.008843	ΔRGB(-11,-11,-11)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,21 → 82,23	0.008843	ΔRGB(-7,-7,-7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,22 → 45,24	0.008843	ΔRGB(-3,-3,-3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	37,28 → 42,28	0.008843	ΔRGB(-5,-5,-5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	42,0 → 45,1	0.008211	ΔRGB(-7,-7,-7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,1 → 118,2	0.008211	ΔRGB(25,25,25)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,5 → 4,8	0.008211	ΔRGB(-4,-4,-4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	79,16 → 79,20	0.008211	ΔRGB(-4,-4,-4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,24 → 74,28	0.008211	ΔRGB(19,19,19)	antialiasing coverage residue on a shared outline
AntialiasCoverage	30,2 → 32,4	0.007580	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	118,15 → 120,17	0.007580	ΔRGB(13,13,13)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,18 → 75,21	0.007580	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	33,27 → 35,28	0.007580	ΔRGB(20,20,20)	antialiasing coverage residue on a shared outline
AntialiasCoverage	84,0 → 87,0	0.006948	ΔRGB(-12,-12,-12)	antialiasing coverage residue on a shared outline
AntialiasCoverage	91,5 → 92,7	0.006948	ΔRGB(9,9,9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,9 → 2,12	0.006948	ΔRGB(6,6,6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	98,18 → 99,20	0.006948	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	78,25 → 80,27	0.006948	ΔRGB(14,14,14)	antialiasing coverage residue on a shared outline
AntialiasCoverage	112,0 → 115,0	0.006316	ΔRGB(16,16,16)	antialiasing coverage residue on a shared outline
AntialiasCoverage	4,3 → 6,4	0.006316	ΔRGB(6,6,6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	42,4 → 44,5	0.006316	ΔRGB(-6,-6,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	49,5 → 50,7	0.006316	ΔRGB(-10,-10,-10)	antialiasing coverage residue on a shared outline
AntialiasCoverage	33,6 → 34,8	0.006316	ΔRGB(-6,-6,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	99,10 → 99,13	0.006316	ΔRGB(-7,-7,-7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	75,21 → 76,23	0.006316	ΔRGB(3,3,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	97,21 → 98,23	0.006316	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,24 → 6,26	0.006316	ΔRGB(-5,-5,-5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,5 → 11,6	0.005685	ΔRGB(6,6,6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,6 → 117,9	0.005685	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,15 → 74,18	0.005685	ΔRGB(-2,-2,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	32,16 → 32,18	0.005685	ΔRGB(-3,-3,-3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	2,18 → 2,20	0.005685	ΔRGB(2,2,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,19 → 122,21	0.005685	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,28 → 91,28	0.005685	ΔRGB(-3,-3,-3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	35,0 → 36,1	0.005053	ΔRGB(-8,-8,-8)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-grayscale-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter grayscale group descendants</title>
6<style>
7  @page { size: 264px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 260px;
13    height: 150px;
14    padding: 18px 20px;
15    background: #ffffff;
16    color: #d50000;
17    filter: grayscale(1);
18  }
19  .text {
20    font-size: 36px;
21    font-weight: 700;
22    line-height: 44px;
23  }
24  .child {
25    width: 160px;
26    height: 46px;
27    margin-top: 18px;
28    background: #2962ff;
29  }
30</style>
31</head>
32<body>
33  <div class="group">
34    <div class="text">COLOR</div>
35    <div class="child"></div>
36  </div>
37</body>
38</html>

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.06% (506 px) filter-grayscale · 1PASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.4

why: antialiasing coverage residue on a shared outline

filter: grayscale(1) fully desaturating a four-quadrant color image.

regions (7 total; showing 7 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	7	506	0,0 → 160,160	250	total 0.2% · largest 0.10% · max ΔE 0.4

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	160,0 → 160,80	0.10	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,160 → 80,160	0.10	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,0 → 80,0	0.000797	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,0 → 0,0	0.000398	ΔE 0.3 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,80 → 0,80	0.000398	ΔE 0.3 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	160,80 → 160,80	0.000398	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,160 → 80,160	0.000398	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-grayscale.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter grayscale</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: grayscale(1);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: hue-rotate() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.000125% · raw 0.19% (1504 px) filter-hue-rotate · 120degPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.1

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter: hue-rotate(120deg) rotating the hue of a four-quadrant color image.

regions (2 total; showing 2 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	2	1504	0,0 → 160,160	1001	total 0.6% · largest 0.4% · max ΔE 0.1

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 160,160	0.4	ΔE 0.1 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,0 → 80,80	0.2	ΔE 0.08 ΔRGB(-1,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-hue-rotate.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter hue-rotate</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: hue-rotate(120deg);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: hue-rotate() on a container group — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.27% · raw 0.27% (1065 px) r2-filter-hue-rotate-group-descendants · hue-rotate-group-descendantsPASS via CSS-scale observation: stable same-coordinate outline phaseAntialiasCoveragemissing 0.03%extra 0.001293%ΔE 5.1

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

hue-rotate() must filter descendant text and child paint: A container with a solid background, child chip, and glyphs uses filter:hue-rotate(120deg); all descendants are part of the filtered source graphic. Catches wrong implementation: Implementation applies the color operation only to the box fill/image path and leaves descendants unfiltered.

regions (47 total; showing 47 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	39	969	18,73 → 78,97	361	total 0.3% · largest 0.1%
Missing	4	92	41,73 → 54,95	45	total 0.03% · largest 0.01%
Extra	4	4	43,94 → 47,96	1	total 0.001270% · largest 0.000318%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	63,73 → 78,96	0.1	ΔRGB(-5,-13,-14)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,73 → 36,96	0.09	ΔRGB(-6,-14,-15)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,73 → 22,96	0.03	ΔRGB(-15,-37,-39)	antialiasing coverage residue on a shared outline
AntialiasCoverage	58,73 → 58,91	0.02	ΔRGB(-8,-19,-19)	antialiasing coverage residue on a shared outline
AntialiasCoverage	44,73 → 44,89	0.02	ΔRGB(-6,-13,-13)	antialiasing coverage residue on a shared outline
Missing	41,73 → 41,87	0.01		candidate lacks paint present in reference (0.01%)
Missing	54,73 → 54,87	0.01		candidate lacks paint present in reference (0.01%)
AntialiasCoverage	48,93 → 51,93	0.003810	ΔRGB(-10,-22,-22)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,89 → 45,92	0.003175	ΔRGB(-2,-6,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	41,88 → 41,90	0.002858	ΔRGB(-3,-7,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,94 → 56,95	0.002858	ΔRGB(-5,-13,-12)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,97 → 50,97	0.002858	ΔRGB(-4,-12,-12)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,88 → 54,90	0.002540	ΔRGB(-5,-14,-13)	antialiasing coverage residue on a shared outline
AntialiasCoverage	41,91 → 41,92	0.002223	ΔRGB(-5,-8,-9)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,96 → 53,96	0.002223	ΔRGB(-11,-26,-26)	antialiasing coverage residue on a shared outline
AntialiasCoverage	46,92 → 46,92	0.001588	ΔRGB(-2,-5,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	50,97 → 52,97	0.001588	ΔRGB(-11,-27,-29)	antialiasing coverage residue on a shared outline
AntialiasCoverage	77,75 → 77,76	0.001270	ΔRGB(1,3,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	53,91 → 53,92	0.001270	ΔRGB(-2,-7,-8)	antialiasing coverage residue on a shared outline
AntialiasCoverage	42,93 → 42,94	0.001270	ΔRGB(-6,-16,-16)	antialiasing coverage residue on a shared outline
AntialiasCoverage	44,95 → 44,95	0.001270	ΔRGB(-3,-7,-7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	46,96 → 47,96	0.001270	ΔRGB(-17,-39,-40)	antialiasing coverage residue on a shared outline
AntialiasCoverage	58,91 → 58,92	0.000953	ΔRGB(-1,-4,-4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,93 → 47,93	0.000953	ΔRGB(-6,-12,-13)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,74 → 22,74	0.000635	ΔRGB(-3,-8,-8)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,91 → 54,91	0.000635	ΔRGB(-3,-7,-6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	42,92 → 42,93	0.000635	ΔRGB(-6,-14,-15)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,92 → 52,92	0.000635	ΔRGB(1,4,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,93 → 52,93	0.000635	ΔRGB(-3,-7,-7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	57,93 → 57,93	0.000635	ΔRGB(2,3,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,96 → 22,96	0.000635	ΔRGB(-3,-8,-8)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,96 → 54,96	0.000635	ΔRGB(0,-3,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,96 → 45,96	0.000635	ΔRGB(-2,-5,-6)	antialiasing coverage residue on a shared outline
Missing	41,90 → 41,90	0.000318		candidate lacks paint present in reference (0.000318%)
Missing	44,95 → 44,95	0.000318		candidate lacks paint present in reference (0.000318%)
Extra	43,94 → 43,94	0.000318		candidate adds paint absent from reference (0.000318%)
Extra	44,95 → 44,95	0.000318		candidate adds paint absent from reference (0.000318%)
Extra	46,96 → 46,96	0.000318		candidate adds paint absent from reference (0.000318%)
Extra	47,96 → 47,96	0.000318		candidate adds paint absent from reference (0.000318%)
AntialiasCoverage	53,92 → 53,92	0.000318	ΔRGB(0,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	57,92 → 57,92	0.000318	ΔRGB(-7,-17,-19)	antialiasing coverage residue on a shared outline
AntialiasCoverage	57,93 → 57,93	0.000318	ΔRGB(-5,-12,-12)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,94 → 43,94	0.000318	ΔRGB(-12,-26,-26)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,94 → 43,94	0.000318	ΔRGB(-9,-21,-21)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,95 → 43,95	0.000318	ΔRGB(-9,-21,-21)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,95 → 54,95	0.000318	ΔRGB(2,5,6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,96 → 45,96	0.000318	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-hue-rotate-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 hue rotate group descendants</title>
6<style>
7  @page { size: 264px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 230px;
13    height: 140px;
14    padding: 16px;
15    background: #3949ab;
16    color: #ffffff;
17  }
18  .chip {
19    width: 86px;
20    height: 42px;
21    background: #ffca28;
22  }
23  .label {
24    margin-top: 10px;
25    font-size: 30px;
26    font-weight: 700;
27    line-height: 36px;
28  }
29  .group { filter: hue-rotate(120deg); }
30</style>
31</head>
32<body>
33  <div class="group"><div class="chip"></div><div class="label">HUE</div></div>
34</body>
35</html>

filter: invert() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.000125% · raw 0.13% (1008 px) filter-invert · 1PASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.2

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter: invert(1) inverting the colors of a four-quadrant color image.

regions (4 total; showing 4 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	4	1008	0,0 → 160,160	1001	total 0.4% · largest 0.4% · max ΔE 0.2

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 160,160	0.4	ΔE 0.2 ΔRGB(-1,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,0 → 80,0	0.001195	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,80 → 0,80	0.001195	ΔRGB(1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,0 → 0,0	0.000398	ΔE 0.04 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-invert.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter invert</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: invert(1);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: invert() on a container group — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.47% · raw 0.50% (1951 px) r2-filter-invert-group-descendants · invert-group-descendantsPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 5.3

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

invert() must filter descendant text and child paint: A container with a solid background, child chip, and glyphs uses filter:invert(100%); all descendants are part of the filtered source graphic. Catches wrong implementation: Implementation applies the color operation only to the box fill/image path and leaves descendants unfiltered.

regions (115 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	115	1951	18,73 → 124,96	361	total 0.6% · largest 0.1%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	70,73 → 85,96	0.1	ΔRGB(13,12,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	105,73 → 124,96	0.08	ΔRGB(26,24,11)	antialiasing coverage residue on a shared outline
AntialiasCoverage	27,73 → 34,96	0.06	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	89,73 → 98,96	0.05	ΔRGB(17,16,7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	40,73 → 45,96	0.05	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,73 → 22,96	0.03	ΔRGB(37,34,15)	antialiasing coverage residue on a shared outline
AntialiasCoverage	22,74 → 22,96	0.02	ΔRGB(8,7,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	93,77 → 98,84	0.02	ΔRGB(17,16,7)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,73 → 52,76	0.01	ΔRGB(13,12,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	63,73 → 68,75	0.008256	ΔRGB(13,12,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	57,88 → 58,91	0.006351	ΔRGB(10,9,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	38,85 → 40,89	0.006033	ΔRGB(5,5,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	103,96 → 108,96	0.005716	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,85 → 64,89	0.005398	ΔRGB(5,5,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,96 → 60,96	0.005398	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	99,77 → 100,81	0.005081	ΔRGB(9,8,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	36,81 → 37,84	0.004763	ΔRGB(3,3,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,90 → 101,93	0.004446	ΔRGB(-6,-5,-3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	34,85 → 35,87	0.003493	ΔRGB(5,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	67,75 → 68,77	0.003175	ΔRGB(10,10,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,76 → 63,78	0.003175	ΔRGB(5,5,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	66,77 → 67,79	0.003175	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	48,77 → 49,80	0.003175	ΔRGB(8,7,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	65,80 → 66,82	0.003175	ΔRGB(11,10,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	49,80 → 50,82	0.003175	ΔRGB(11,10,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,81 → 54,83	0.003175	ΔRGB(8,7,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	64,82 → 65,84	0.003175	ΔRGB(7,6,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	50,83 → 51,85	0.003175	ΔRGB(8,8,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	103,83 → 104,84	0.003175	ΔRGB(4,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,84 → 55,86	0.003175	ΔRGB(6,5,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	51,85 → 52,87	0.003175	ΔRGB(10,9,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	59,86 → 59,88	0.003175	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	54,92 → 54,94	0.003175	ΔRGB(8,8,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	56,86 → 56,88	0.002858	ΔRGB(7,6,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	103,88 → 104,89	0.002858	ΔRGB(3,3,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	103,76 → 104,77	0.002540	ΔRGB(11,10,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	37,92 → 38,93	0.002540	ΔRGB(6,6,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,76 → 52,77	0.002223	ΔRGB(3,3,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,78 → 62,80	0.002223	ΔRGB(6,5,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	53,78 → 53,80	0.002223	ΔRGB(2,2,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	61,81 → 61,82	0.002223	ΔRGB(5,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	32,81 → 33,83	0.002223	ΔRGB(5,5,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	60,83 → 60,85	0.002223	ΔRGB(3,3,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	38,93 → 39,95	0.002223	ΔRGB(2,2,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	48,76 → 48,77	0.001905	ΔRGB(9,8,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,78 → 104,79	0.001905	ΔRGB(8,8,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	99,82 → 100,83	0.001905	ΔRGB(7,6,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	101,85 → 102,86	0.001905	ΔRGB(-5,-4,-2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	35,88 → 36,89	0.001905	ΔRGB(5,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,88 → 52,89	0.001905	ΔRGB(7,6,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	53,89 → 53,91	0.001905	ΔRGB(5,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	60,92 → 61,94	0.001905	ΔRGB(9,8,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	60,94 → 60,95	0.001905	ΔRGB(6,5,3)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,94 → 55,96	0.001905	ΔRGB(4,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	99,74 → 100,74	0.001588	ΔRGB(10,9,4)	antialiasing coverage residue on a shared outline
AntialiasCoverage	85,75 → 85,76	0.001270	ΔRGB(-3,-3,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,80 → 104,81	0.001270	ΔRGB(14,13,6)	antialiasing coverage residue on a shared outline
AntialiasCoverage	102,85 → 102,85	0.001270	ΔRGB(-2,-2,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	102,87 → 103,87	0.001270	ΔRGB(5,4,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	98,87 → 98,88	0.001270	ΔRGB(2,2,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	99,89 → 100,89	0.001270	ΔRGB(12,11,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	36,80 → 36,80	0.000953	ΔRGB(6,6,2)	antialiasing coverage residue on a shared outline
AntialiasCoverage	104,82 → 104,82	0.000953	ΔRGB(11,10,5)	antialiasing coverage residue on a shared outline
AntialiasCoverage	62,90 → 62,90	0.000953	ΔRGB(4,4,2)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-invert-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 invert group descendants</title>
6<style>
7  @page { size: 264px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 230px;
13    height: 140px;
14    padding: 16px;
15    background: #3949ab;
16    color: #ffffff;
17  }
18  .chip {
19    width: 86px;
20    height: 42px;
21    background: #ffca28;
22  }
23  .label {
24    margin-top: 10px;
25    font-size: 30px;
26    font-weight: 700;
27    line-height: 36px;
28  }
29  .group { filter: invert(100%); }
30</style>
31</head>
32<body>
33  <div class="group"><div class="chip"></div><div class="label">INVERT</div></div>
34</body>
35</html>

filter: opacity() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.27% (2126 px) filter-opacity-fn · 0.5-over-greyPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.4

why: antialiasing coverage residue on a shared outline

filter: opacity(0.5) compositing a red box over a grey backdrop; distinct from the opacity property.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	2126	0,0 → 200,140	2126	total 0.8% · largest 0.8% · max ΔE 0.4

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 200,140	0.8	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-opacity-fn.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter opacity()</title>
6<style>
7  @page { size: 360px 224px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  /* Solid grey backdrop so the half-opacity box composites to a known grey. */
12  .frame { padding: 40px; }
13  .bg { width: 200px; height: 140px; background-color: #b0bec5; }
14  .box {
15    width: 200px;
16    height: 140px;
17    background-color: #c62828;
18    filter: opacity(0.5);
19  }
20</style>
21</head>
22<body>
23  <div class="frame"><div class="bg"><div class="box"></div></div></div>
24</body>
25</html>

filter: saturate() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.000375% · raw 0.25% (2000 px) filter-saturate · 3PASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.04

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

filter: saturate(3) boosting saturation of a four-quadrant color image.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	2000	0,0 → 160,160	2000	total 0.8% · largest 0.8% · max ΔE 0.04

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 160,160	0.8	ΔE 0.04 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-saturate.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter saturate</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: saturate(3);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: saturate() on a container group — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.61% · raw 0.66% (2590 px) r2-filter-saturate-group-descendants · saturate-group-descendantsPASS via CSS-scale observation: stable same-coordinate outline phaseAntialiasCoveragemissing 0.007303%extra 0.003984%ΔE 4.3

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

saturate() must filter descendant text and child paint: A container with a solid background, child chip, and glyphs uses filter:saturate(300%); all descendants are part of the filtered source graphic. Catches wrong implementation: Implementation applies the color operation only to the box fill/image path and leaves descendants unfiltered.

regions (277 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	244	2556	17,73 → 168,97	372	total 0.8% · largest 0.1%
Extra	12	12	19,73 → 105,96	1	total 0.003810% · largest 0.000318%
Missing	21	22	18,77 → 129,96	2	total 0.006986% · largest 0.000635%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	153,73 → 168,96	0.1	ΔRGB(-16,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	53,73 → 73,96	0.08	ΔRGB(-29,-23,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	131,73 → 151,96	0.08	ΔRGB(-33,-27,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	96,73 → 106,96	0.04	ΔRGB(-43,-34,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	78,73 → 78,91	0.02	ΔRGB(-17,-14,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	92,73 → 92,89	0.02	ΔRGB(-24,-21,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,73 → 74,88	0.02	ΔRGB(2,2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	88,73 → 88,87	0.01	ΔRGB(11,8,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	111,89 → 115,94	0.01	ΔRGB(-5,-4,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	41,91 → 50,91	0.009526	ΔRGB(-15,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	119,91 → 128,91	0.009526	ΔRGB(-15,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,87 → 49,87	0.007303	ΔRGB(-18,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,87 → 127,87	0.007303	ΔRGB(-18,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	107,89 → 109,93	0.005716	ΔRGB(6,4,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	38,85 → 39,89	0.005398	ΔRGB(-8,-8,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	116,85 → 117,89	0.005398	ΔRGB(-8,-8,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	32,74 → 32,78	0.005081	ΔRGB(-5,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	107,78 → 107,82	0.005081	ΔRGB(-7,-7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,91 → 18,95	0.005081	ΔRGB(-36,-30,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,77 → 105,77	0.004763	ΔRGB(-16,-13,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,84 → 105,84	0.004763	ΔRGB(-18,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,91 → 100,95	0.004763	ΔRGB(-10,-7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,97 → 27,97	0.004763	ΔRGB(-7,-7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	81,97 → 85,97	0.004763	ΔRGB(-29,-23,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	44,79 → 45,83	0.004446	ΔRGB(-6,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	122,79 → 123,83	0.004446	ΔRGB(-6,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,83 → 44,86	0.004446	ΔRGB(-8,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,83 → 122,86	0.004446	ΔRGB(-8,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	48,83 → 49,86	0.004446	ΔRGB(-5,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	126,83 → 127,86	0.004446	ΔRGB(-5,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,90 → 87,92	0.004446	ΔRGB(-2,-2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,93 → 27,93	0.004446	ΔRGB(-9,-9,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	110,96 → 115,96	0.004446	ΔRGB(-15,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	111,78 → 111,82	0.004128	ΔRGB(-15,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	34,88 → 34,92	0.004128	ΔRGB(-12,-9,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	109,93 → 110,96	0.004128	ΔRGB(1,1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,87 → 104,87	0.003810	ΔRGB(-15,-12,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	109,75 → 110,76	0.003493	ΔRGB(-6,-3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,77 → 18,80	0.003493	ΔRGB(-1,-1,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,92 → 22,93	0.003493	ΔRGB(-11,-10,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	81,93 → 84,93	0.003493	ΔRGB(-32,-23,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	24,73 → 27,73	0.003175	ΔRGB(-29,-23,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	43,73 → 44,76	0.003175	ΔRGB(-4,-3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,73 → 122,76	0.003175	ΔRGB(-4,-3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	100,79 → 100,82	0.003175	ΔRGB(-10,-7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	40,80 → 41,82	0.003175	ΔRGB(-7,-4,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	118,80 → 119,82	0.003175	ΔRGB(-7,-4,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	51,80 → 51,83	0.003175	ΔRGB(-8,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	129,80 → 129,83	0.003175	ΔRGB(-8,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	47,81 → 47,83	0.003175	ΔRGB(-8,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	125,81 → 125,83	0.003175	ΔRGB(-8,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	52,83 → 52,85	0.003175	ΔRGB(-6,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	130,83 → 130,85	0.003175	ΔRGB(-6,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	74,89 → 75,92	0.003175	ΔRGB(-3,-3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	37,89 → 37,92	0.003175	ΔRGB(-8,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	115,89 → 116,92	0.003175	ΔRGB(-8,-5,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	36,92 → 36,94	0.003175	ΔRGB(-13,-10,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	55,92 → 56,94	0.003175	ΔRGB(-9,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	133,92 → 134,94	0.003175	ΔRGB(-9,-6,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	25,76 → 27,76	0.002858	ΔRGB(3,3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	45,78 → 46,79	0.002858	ΔRGB(-10,-7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,78 → 124,79	0.002858	ΔRGB(-10,-7,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	109,84 → 110,85	0.002858	ΔRGB(6,3,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,78 → 21,80	0.002540	ΔRGB(-11,-8,0)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-saturate-group-descendants.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 saturate group descendants</title>
6<style>
7  @page { size: 264px 152px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .group {
12    width: 230px;
13    height: 140px;
14    padding: 16px;
15    background: #3949ab;
16    color: #ffffff;
17  }
18  .chip {
19    width: 86px;
20    height: 42px;
21    background: #ffca28;
22  }
23  .label {
24    margin-top: 10px;
25    font-size: 30px;
26    font-weight: 700;
27    line-height: 36px;
28  }
29  .group { filter: saturate(300%); }
30</style>
31</head>
32<body>
33  <div class="group"><div class="chip"></div><div class="label">SATURATE</div></div>
34</body>
35</html>

filter: sepia() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.06% (510 px) filter-sepia · 1PASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.4

why: antialiasing coverage residue on a shared outline

filter: sepia(1) applying a sepia tone to a four-quadrant color image.

regions (6 total; showing 6 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	6	510	0,0 → 160,160	252	total 0.2% · largest 0.1% · max ΔE 0.8

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	160,0 → 160,80	0.1	ΔE 0.4 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,160 → 80,160	0.1	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	80,0 → 80,0	0.000797	ΔE 0.8 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,80 → 0,80	0.000797	ΔE 0.5 ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	0,0 → 0,0	0.000398	ΔE 0.4 ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	160,160 → 160,160	0.000398	ΔE 0.3 ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-sepia.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter sepia</title>
6<style>
7  @page { size: 320px 256px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  img.t {
13    width: 160px;
14    height: 160px;
15    image-rendering: pixelated;
16    filter: sepia(1);
17  }
18</style>
19</head>
20<body>
21  <div class="frame"><img class="t" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAc0lEQVR42u3QMQEAIAwDMORUBGKRMxF4ARk7liMGsip5nXJ6LQECBAgQIECAAAECBAgQIECAAAECBAgQIECAAAECBAgQIGBAQHa9TrfSSoAAAQIECBAgQIAAAQIECBAgQIAAAQIECBAgQIAAAQIECBgQ8AFCMfIOlbOSBgAAAABJRU5ErkJggg=="></div>
22</body>
23</html>

filter: url(#id) with feBlend multiply — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.000317% · raw 0.41% (1297 px) r2-filter-url-feblend-multiply · feblend-multiplyPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.3

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feBlend must composite primitive inputs: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (5 total; showing 5 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	5	1297	16,24 → 142,105	649	total 0.4% · largest 0.2%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	16,24 → 142,105	0.2	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	34,36 → 124,93	0.2	ΔRGB(0,-2,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	34,36 → 34,94	0.06	ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,24 → 16,24	0.000333	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,94 → 124,94	0.000333	ΔRGB(0,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-feblend-multiply.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 feblend-multiply</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-20%" y="-20%" width="140%" height="140%"><feFlood flood-color="#1565c0" result="blue"/><feBlend in="SourceGraphic" in2="blue" mode="multiply"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feColorMatrix luminanceToAlpha — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.29% (928 px) r2-filter-url-fecolormatrix-luminance-alpha · fecolormatrix-luminance-to-alphaPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

SVG feColorMatrix luminanceToAlpha must affect alpha: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	928	34,36 → 124,94	928	total 0.3% · largest 0.3%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	34,36 → 124,94	0.3	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-fecolormatrix-luminance-alpha.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 fecolormatrix-luminance-to-alpha</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-20%" y="-20%" width="140%" height="140%"><feColorMatrix type="luminanceToAlpha"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feColorMatrix type=matrix channel swap — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.09% · raw 0.53% (1667 px) r2-filter-url-fecolormatrix-channel-swap · fecolormatrix-channel-swapPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.2

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feColorMatrix arbitrary matrices must be honored: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	1667	34,36 → 124,94	1667	total 0.6% · largest 0.6%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	34,36 → 124,94	0.6	ΔRGB(-1,-1,0)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-fecolormatrix-channel-swap.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 fecolormatrix-channel-swap</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-20%" y="-20%" width="140%" height="140%"><feColorMatrix type="matrix" values="0 0 1 0 0  0 1 0 0 0  1 0 0 0 0  0 0 0 1 0"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feComponentTransfer — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.09% · raw 0.38% (1211 px) r2-filter-url-fecomponenttransfer · fecomponenttransferPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 0.4

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feComponentTransfer must apply channel transfer functions: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	1211	34,36 → 124,94	1211	total 0.4% · largest 0.4%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	34,36 → 124,94	0.4	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-fecomponenttransfer.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 fecomponenttransfer</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-20%" y="-20%" width="140%" height="140%"><feComponentTransfer><feFuncR type="table" tableValues="0 0"/><feFuncG type="identity"/><feFuncB type="identity"/><feFuncA type="identity"/></feComponentTransfer></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feComposite operator=in — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.38% (1210 px) r2-filter-url-fecomposite-in · fecomposite-inPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

SVG feComposite must support Porter-Duff operators: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	1210	34,36 → 124,94	1210	total 0.4% · largest 0.4%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	34,36 → 124,94	0.4	ΔRGB(-1,0,-1)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-fecomposite-in.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 fecomposite-in</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-20%" y="-20%" width="140%" height="140%"><feFlood flood-color="#2e7d32" result="green"/><feComposite in="green" in2="SourceAlpha" operator="in"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feDropShadow — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.000317% · raw 0.48% (1514 px) r2-filter-url-fedropshadow · fedropshadowPASS via CSS-scale observation: coherent sub-authored colour frontierAntialiasCoverageΔE 0.3

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feDropShadow primitive must render inside filter url(): An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (3 total; showing 3 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	3	1514	34,36 → 176,94	1354	total 0.5% · largest 0.5%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	34,36 → 176,94	0.5	ΔRGB(-1,-1,-1)	antialiasing coverage residue on a shared outline
AntialiasCoverage	35,36 → 85,36	0.05	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	86,36 → 86,36	0.000666	ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-fedropshadow.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 fedropshadow</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-40%" y="-40%" width="200%" height="180%"><feDropShadow dx="52" dy="0" stdDeviation="0" flood-color="#111111" flood-opacity="1"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feMerge — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.52% · raw 0.71% (2233 px) r2-filter-url-femerge · femergePASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 16.5

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feMerge must paint multiple primitive outputs: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	2233	34,36 → 169,94	2233	total 0.7% · largest 0.7%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	34,36 → 169,94	0.7	ΔRGB(1,74,74)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-femerge.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 femerge</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-40%" y="-20%" width="190%" height="140%"><feOffset in="SourceGraphic" dx="62" dy="0" result="shift"/><feMerge><feMergeNode in="shift"/><feMergeNode in="SourceGraphic"/></feMerge></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feMorphology — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.78% · raw 0.78% (2456 px) r2-filter-url-femorphology-dilate · femorphology-dilatePASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 24.9

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feMorphology must dilate/erode the source alpha: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	2456	21,23 → 136,106	2456	total 0.8% · largest 0.8%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	21,23 → 136,106	0.8	ΔRGB(3,99,99)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-femorphology-dilate.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 femorphology-dilate</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-40%" y="-40%" width="180%" height="180%"><feMorphology operator="dilate" radius="12"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#id) with feOffset — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.27% · raw 0.45% (1417 px) r2-filter-url-feoffset · feoffsetPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 12.9

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

SVG feOffset must move filtered output: An inline SVG filter referenced from CSS contains a non-feColorMatrix primitive or unsupported matrix form. Catches wrong implementation: CSS filter:url() resolver extracts only a narrow feColorMatrix subset and skips the primitive.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	1417	90,36 → 160,94	1417	total 0.5% · largest 0.5%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	90,36 → 160,94	0.5	ΔRGB(1,19,19)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-url-feoffset.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 feoffset</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
12  .stage { width: 220px; height: 140px; padding: 36px 34px; background: #d9d9d9; }
13  .box { width: 90px; height: 58px; background: #d50000; filter: url(#r2f); }
14</style>
15</head>
16<body>
17  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false"><defs><filter id="r2f" x="-40%" y="-20%" width="180%" height="140%"><feOffset dx="56" dy="0"/></filter></defs></svg>
18  <div class="stage"><div class="box"></div></div>
19</body>
20</html>

filter: url(#missing) blur() — 100.00% verified visual parity PASS 1 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0.08% · raw 0.08% (250 px) r2-filter-missing-url-invalidates-chain · missing-url-invalidates-list · oracle: weasyprintPASS via CSS-scale observation: sub-CSS shared-colour coverageAntialiasCoverageΔE 19.1

why: visually accepted coverage phase; raw antialiasing coverage residue on a shared outline

Unresolved filter url() must ignore the entire filter chain: A filter list starts with an unresolved url(#missing) followed by blur(7px); the whole chain is ignored. Catches wrong implementation: Implementation treats the missing url as a no-op and still applies the later blur.

regions (1 total; showing 1 representative)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	1	250	0,0 → 0,80	250	total 0.3% · largest 0.3%

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	0,0 → 0,80	0.3	ΔRGB(-81,-53,-21)	antialiasing coverage residue on a shared outline

source · cases/filters/r2-filter-missing-url-invalidates-chain.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>r2 missing filter url invalidates chain</title>
6<style>
7  @page { size: 220px 150px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .stage { width: 220px; height: 150px; padding: 35px; background: #ffffff; }
12  .box { width: 120px; height: 80px; background: #1565c0; filter: url(#missing-filter-r2) blur(7px); }
13</style>
14</head>
15<body>
16  <div class="stage"><div class="box"></div></div>
17</body>
18</html>

filter: url() — 100.00% verified visual parity PASS 2 · FAIL 0 · REFERENCE-DISPUTED 0all categories ↑

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 34.82% (274184 px) filter-url-svg · svg-fecolormatrixPASS via raw same-coordinate visibility policyColorValueΔE 0.4

why: fill recolour ΔRGB(-1,-1,-1) (ΔE 0.4)

filter: url(#id) referencing an inline SVG feColorMatrix saturate filter (aspirational).

regions (2 total; showing 2 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	2	274184	0,0 → 200,140	273560	total 99.8% · largest 99.5% · max ΔE 0.4

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
ColorValue	0,0 → 200,140	99.5	ΔE 0.4 ΔRGB(-1,-1,-1)	fill recolour ΔRGB(-1,-1,-1) (ΔE 0.4)
AntialiasCoverage	0,140 → 200,140	0.2	ΔRGB(1,1,1)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-url-svg.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter url(#svgFilter)</title>
6<style>
7  @page { size: 360px 224px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  .frame { padding: 40px; }
12  .box {
13    width: 200px;
14    height: 140px;
15    background-color: #2e7d32;
16    filter: url(#sat);
17  }
18</style>
19</head>
20<body>
21  <svg width="0" height="0" style="position:absolute" aria-hidden="true">
22    <filter id="sat">
23      <feColorMatrix type="saturate" values="0"/>
24    </filter>
25  </svg>
26  <div class="frame"><div class="box"></div></div>
27</body>
28</html>

PASS visually equivalent · no rejecting defect · thresholded evidence 0% · raw 0.55% (1725 px) filter-url-svg-gaussian-blur · svg-fegaussianblurPASS via raw same-coordinate visibility policyAntialiasCoverageΔE 0.3

why: antialiasing coverage residue on a shared outline

filter:url(#id) references an inline SVG feGaussianBlur primitive; catches URL-filter implementations limited to feColorMatrix or no-op filters.

regions (332 total; showing 64 representatives)

Complete component census grouped by dominant raster class; representative details are bounded.

Complete dominant-class aggregates

class	regions	pixels	union bbox (CSS px)	largest px	maximum magnitude
ColorErr	332	1725	3,5 → 139,86	286	total 1.4% · largest 0.2% · max ΔE 0.4

Representative region details (worst-first)

class	bbox (CSS px)	area%	magnitude	reason
AntialiasCoverage	25,78 → 116,78	0.2	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	11,24 → 11,67	0.2	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,25 → 127,67	0.2	ΔE 0.4 ΔRGB(-2,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,22 → 3,70	0.1	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	5,23 → 5,68	0.1	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,16 → 126,18	0.01	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	130,67 → 130,69	0.008613	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	130,23 → 130,25	0.007047	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	125,73 → 126,75	0.007047	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	23,14 → 23,15	0.005481	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,18 → 17,19	0.005481	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	119,14 → 119,15	0.004698	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	20,15 → 20,16	0.004698	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,21 → 12,22	0.004698	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	135,22 → 135,24	0.004698	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	135,68 → 135,69	0.004698	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	18,75 → 19,76	0.004698	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	139,19 → 139,20	0.003915	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,22 → 15,23	0.003915	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	15,68 → 15,69	0.003915	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,70 → 12,71	0.003915	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	139,71 → 139,72	0.003915	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	123,15 → 123,16	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,15 → 124,16	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,17 → 12,17	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,17 → 14,17	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	130,18 → 130,19	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	137,20 → 137,20	0.003132	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	126,20 → 127,20	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,21 → 127,22	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,69 → 8,70	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	127,69 → 127,70	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	131,69 → 131,70	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	126,71 → 127,71	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	137,71 → 137,72	0.003132	ΔE 0.3 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	16,72 → 16,73	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,73 → 12,74	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	17,74 → 17,75	0.003132	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	128,74 → 129,75	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,75 → 13,75	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	124,75 → 124,76	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	19,76 → 19,76	0.003132	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	132,13 → 133,14	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	21,15 → 21,15	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	121,15 → 121,15	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	139,17 → 139,17	0.002349	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,18 → 13,18	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,18 → 3,19	0.002349	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	12,20 → 13,20	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	9,20 → 9,21	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	8,21 → 8,22	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	131,22 → 131,22	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	133,22 → 133,23	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,23 → 13,23	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	128,23 → 128,24	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	129,67 → 129,68	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	118,67 → 118,68	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	128,68 → 128,68	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	13,68 → 13,69	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	117,68 → 118,68	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	133,68 → 133,69	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	7,71 → 7,71	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	126,72 → 126,72	0.002349	ΔE 0.2 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline
AntialiasCoverage	3,73 → 3,74	0.002349	ΔE 0.4 ΔRGB(-1,0,0)	antialiasing coverage residue on a shared outline

source · cases/filters/filter-url-svg-gaussian-blur.html

1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8">
5<title>filter url svg gaussian blur</title>
6<style>
7  @page { size: 224px 144px; margin: 0; }
8  html { font-family: ParitySans; line-height: 1.5; }
9  * { margin: 0; box-sizing: border-box; }
10  html, body { background: #ffffff; }
11  svg.defs {
12    position: absolute;
13    width: 0;
14    height: 0;
15    overflow: hidden;
16  }
17  .stage {
18    width: 220px;
19    height: 140px;
20    padding: 30px;
21    background: #ffffff;
22  }
23  .box {
24    width: 120px;
25    height: 70px;
26    background: #d50000;
27    filter: url(#soften);
28  }
29</style>
30</head>
31<body>
32  <svg class="defs" width="0" height="0" aria-hidden="true" focusable="false">
33    <defs>
34      <filter id="soften" x="-30%" y="-40%" width="160%" height="180%">
35        <feGaussianBlur stdDeviation="6"/>
36      </filter>
37    </defs>
38  </svg>
39  <div class="stage"><div class="box"></div></div>
40</body>
41</html>