[Standards] XEP-0392: Consisten Colors - Error in Test Vectors?

Paul Schaub vanitasvitae at riseup.net
Wed Feb 7 12:12:41 UTC 2018


Hi!

I'm currently implementing XEP-0392 and I'm unable to reproduce the
values from the test vectors. More specifically, all my values are more
or less correct (very small rounding errors), apart from the B value.

I noticed that the B value in the test vectors is always suspiciously
even (1.00 or 0.00), so I wonder, if the author made a mistake there.

My values are the following:

Deficiency            Input                    Angle                CB        CR                        R            G            B

none:                 'Romeo',                 5.711681589892942,     0.5,     -0.32154605279699133,     0.28119242, 0.78955954, 1.618

redGreenBlindness:     'Romeo',                 2.570088936303149,     -0.5,     0.3215460527969912,     1.1828076,     0.67444044, -0.154

blueBlindness:         'Romeo',                 2.570088936303149,     -0.5,     0.3215460527969912,     1.1828076,     0.67444044, -0.154

none:                 'juliet at capulet.lit',     3.6549009747360257, -0.5,     -0.28185511000034474,     0.33683914, 1.1053511,     -0.154

redGreenBlindness:     'juliet at capulet.lit',     0.5133083211462326, 0.5,     0.2818551100003448,     1.1271609,     0.3586489,     1.618

blueBlindness:         'juliet at capulet.lit',     3.6549009747360257, -0.5,     -0.28185511000034474,     0.33683914, 1.1053511,     -0.154

none:                 '😺',                     5.78051897774931,     0.5,     -0.2748848171290424,     0.3466115,     0.7562371,     1.618

redGreenBlindness:     '😺',                     2.6389263241595167, -0.5,     0.2748848171290423,     1.1173885,     0.7077629,     -0.154

blueBlindness:         '😺',                     2.6389263241595167, -0.5,     0.2748848171290423,     1.1173885,     0.7077629,     -0.154

none:                 'council',                 6.2830894333803435, 0.5,     -4.793689976834576E-5,     0.7319328,     0.5599661,     1.618

redGreenBlindness:     'council',                 3.1414967797905504, -0.5,     4.793689976828453E-5,     0.7320672,     0.9040339,     -0.154

blueBlindness:         'council',                 3.1414967797905504, -0.5,     4.793689976828453E-5,     0.7320672,     0.9040339,     -0.154



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