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craft-cms: reference-value regression cases, including the reported DesignCraft orange

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The reference value for CMYK 0/41/90/4 in Coated FOGRA39 is 239,161,35.
The fitted profile gives 239,161,33 (ΔE00 0.16); the uncalibrated formula
DesignCraft used gives 245,144,25 (ΔE00 6.36). Six more reference values
(K50 grey, rich black, light tint, skin tone, C+Y green, near-neutral)
are within 0.7 ΔE00.
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aiongg
2026-10-13 03:17:20 +00:00
parent 7f05840bc0
commit d282bd06c6
1 changed files with 10 additions and 1 deletions
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crates/cms/tests/fogra39.rs
+10 -1
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@@ -459,7 +459,7 @@ fn in_gamut_lab_round_trips() {
/// Reference sRGB values for CMYK in Coated FOGRA39 (relative colorimetric with black point
/// compensation).
const REFERENCE_SRGB: [([f64; 4], [u8; 3]); 8] = [
const REFERENCE_SRGB: [([f64; 4], [u8; 3]); 15] = [
([0.0, 0.5, 1.0, 0.0], [243, 146, 0]),
([0.0, 0.6, 1.0, 0.0], [239, 125, 0]),
([1.0, 0.0, 0.0, 0.0], [0, 159, 227]),
@@ -468,6 +468,15 @@ const REFERENCE_SRGB: [([f64; 4], [u8; 3]); 8] = [
([0.0, 0.0, 0.0, 1.0], [29, 29, 27]),
([1.0, 1.0, 0.0, 0.0], [49, 39, 131]),
([0.0, 1.0, 1.0, 0.0], [227, 6, 19]),
// Reported DesignCraft orange: shown as 245,144,25 by the uncalibrated formula.
([0.0, 0.41, 0.9, 0.04], [239, 161, 35]),
// Grey, rich black, tint, skin tone, green and a near-neutral.
([0.0, 0.0, 0.0, 0.5], [157, 157, 156]),
([0.6, 0.4, 0.4, 1.0], [2, 10, 10]),
([0.1, 0.05, 0.0, 0.0], [233, 238, 249]),
([0.05, 0.3, 0.4, 0.0], [241, 192, 157]),
([1.0, 0.0, 1.0, 0.0], [0, 150, 64]),
([0.4, 0.3, 0.3, 0.1], [157, 158, 159]),
];
fn to_srgb(profile: &Profile) -> impl Fn([f64; 4]) -> [u8; 3] {