Recommended Values for Use in Colour Examples and Unit Tests

colour_examples_and_unit_tests_recommended_values.py

import numpy as np
import colour

np.set_printoptions(formatter={'float': '{:0.8f}'.format}, threshold=np.nan)

print('Recommended Values for Use in Colour Examples and Unit Tests')
print()

print('Illuminants "xy"')
print()

print('D65', ':',
      repr(colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D65']))
print('D50', ':',
      repr(colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D50']))
print('A', ':',
      repr(colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['A']))
print('E', ':',
      repr(colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['E']))
print('F2', ':',
      repr(colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['F2']))
print('CC I', ':', repr(colour.COLOURCHECKERS['ColorChecker 2005'].illuminant))

print()
print()

D65 = colour.xy_to_XYZ(
    colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D65'])
D50 = colour.xy_to_XYZ(
    colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D50'])
A = colour.xy_to_XYZ(
    colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['A'])
F2 = colour.xy_to_XYZ(
    colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['F2'])
E = colour.xy_to_XYZ(
    colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['E'])
CC_I = colour.xy_to_XYZ(colour.COLOURCHECKERS['ColorChecker 2005'].illuminant)

print('Illuminants "XYZ"')
print()

print('D65', ':', repr(D65))
print('D50', ':', repr(D50))
print('A', ':', repr(A))
print('F2', ':', repr(F2))
print('E', ':', repr(E))
print('CC I', ':', repr(CC_I))

print()
print()

for name, illuminant in {
        'D65': D65,
        'D50': D50,
        'A': A,
        'E': E,
        'F2': F2
}.items():
    print('ColorChecker 2005 "XYZ" Adapted to "{0}"'.format(name))
    print()
    for swatch in [
            'red',
            'green',
            'blue',
            'cyan',
            'yellow',
            'magenta',
            'neutral 5 (.70 D)',
    ]:
        XYZ = colour.xyY_to_XYZ(
            colour.COLOURCHECKERS['ColorChecker 2005'].data[swatch])
        print(swatch, ':',
              repr(colour.chromatic_adaptation(XYZ, CC_I, illuminant)))
    print()
    print()

for name, illuminant in {
        'D65': D65,
        'D50': D50,
        'A': A,
        'E': E,
        'F2': F2
}.items():
    print('Luminance "XYZ" Adapted to "{0}"'.format(name))
    print()
    for swatch in [
            'red',
            'green',
            'blue',
            'cyan',
            'yellow',
            'magenta',
            'neutral 5 (.70 D)',
    ]:
        XYZ = colour.xyY_to_XYZ(
            colour.COLOURCHECKERS['ColorChecker 2005'].data[swatch])
        print(swatch, ':', '{:0.8f}'.format(
            colour.chromatic_adaptation(XYZ, CC_I, illuminant)[1] * 100))
    print()
    print()

for name, illuminant in {'D65': D65}.items():
    print('ColorChecker 2005 "sRGB - Linear" under "{0}"'.format(name))
    print()
    for swatch in [
            'red',
            'green',
            'blue',
            'cyan',
            'yellow',
            'magenta',
            'neutral 5 (.70 D)',
    ]:
        XYZ = colour.xyY_to_XYZ(
            colour.COLOURCHECKERS['ColorChecker 2005'].data[swatch])
        print(swatch, ':',
              repr(
                  colour.XYZ_to_sRGB(
                      XYZ,
                      colour.COLOURCHECKERS['ColorChecker 2005'].illuminant,
                      apply_encoding_cctf=False)))
    print()
    print()

for name, illuminant in {'D65': D65}.items():
    print('ColorChecker 2005 "sRGB - OETF" under "{0}"'.format(name))
    print()
    for swatch in [
            'red',
            'green',
            'blue',
            'cyan',
            'yellow',
            'magenta',
            'neutral 5 (.70 D)',
    ]:
        XYZ = colour.xyY_to_XYZ(
            colour.COLOURCHECKERS['ColorChecker 2005'].data[swatch])
        print(swatch, ':',
              repr(
                  colour.XYZ_to_sRGB(
                      XYZ,
                      colour.COLOURCHECKERS['ColorChecker 2005'].illuminant)))
    print()
    print()

for name, illuminant in {'D65': D65}.items():
    print('ColorChecker 2005 "Munsell Value"')
    print()
    for swatch in [
            'red',
            'green',
            'blue',
            'cyan',
            'yellow',
            'magenta',
            'neutral 5 (.70 D)',
    ]:
        XYZ = colour.xyY_to_XYZ(
            colour.COLOURCHECKERS['ColorChecker 2005'].data[swatch])
        XYZ = colour.chromatic_adaptation(
            XYZ, D50,
            colour.xy_to_XYZ(
                colour.notation.munsell.
                MUNSELL_DEFAULT_ILLUMINANT_CHROMATICITY_COORDINATES))
        xyY = colour.XYZ_to_xyY(XYZ)
        print(swatch, ':', '{:0.8f}'.format(
            colour.munsell_value(xyY[-1] * 100)))
    print()
    print()

for name, illuminant in {'D65': D65}.items():
    print('ColorChecker 2005 "ASTM D1535-08e1 Luminance"')
    print()
    for swatch in [
            'red',
            'green',
            'blue',
            'cyan',
            'yellow',
            'magenta',
            'neutral 5 (.70 D)',
    ]:
        XYZ = colour.xyY_to_XYZ(
            colour.COLOURCHECKERS['ColorChecker 2005'].data[swatch])
        XYZ = colour.chromatic_adaptation(
            XYZ, D50,
            colour.xy_to_XYZ(
                colour.notation.munsell.
                MUNSELL_DEFAULT_ILLUMINANT_CHROMATICITY_COORDINATES))
        xyY = colour.XYZ_to_xyY(XYZ)
        print(swatch, ':', '{:0.8f}'.format(
            colour.colorimetry.luminance_ASTMD153508(
                colour.munsell_value(xyY[-1] * 100))))
    print()
    print()

interpreter_output.txt

Recommended Values for Use in Colour Examples and Unit Tests

Illuminants "xy"

D65 : array([0.31270000, 0.32900000])
D50 : array([0.34570000, 0.35850000])
A : array([0.44757000, 0.40745000])
E : array([0.33333333, 0.33333333])
F2 : array([0.37208000, 0.37529000])
CC I : array([0.34570000, 0.35850000])


Illuminants "XYZ"

D65 : array([0.95045593, 1.00000000, 1.08905775])
D50 : array([0.96429568, 1.00000000, 0.82510460])
A : array([1.09846607, 1.00000000, 0.35582280])
F2 : array([0.99144661, 1.00000000, 0.67315942])
E : array([1.00000000, 1.00000000, 1.00000000])
CC I : array([0.96429568, 1.00000000, 0.82510460])


ColorChecker 2005 "XYZ" Adapted to "D65"

red : array([0.20654008, 0.12197225, 0.05136952])
green : array([0.14222010, 0.23042768, 0.10495772])
blue : array([0.07818780, 0.06157201, 0.28099326])
cyan : array([0.14525849, 0.19799077, 0.40724370])
yellow : array([0.55676530, 0.58671628, 0.09785344])
magenta : array([0.30795495, 0.20024152, 0.31071274])
neutral 5 (.70 D) : array([0.18182171, 0.19153665, 0.21009620])


ColorChecker 2005 "XYZ" Adapted to "D50"

red : array([0.21638819, 0.12570000, 0.03847493])
green : array([0.14985004, 0.23180000, 0.07900179])
blue : array([0.06857861, 0.05750000, 0.21375591])
cyan : array([0.13605127, 0.19300000, 0.30938736])
yellow : array([0.59342537, 0.59810000, 0.07188823])
magenta : array([0.31084193, 0.20090000, 0.23565391])
neutral 5 (.70 D) : array([0.18438363, 0.19150000, 0.15918203])


ColorChecker 2005 "XYZ" Adapted to "A"

red : array([0.25330530, 0.13765139, 0.01543307])
green : array([0.18673833, 0.23111171, 0.03285972])
blue : array([0.05610693, 0.04992541, 0.09429057])
cyan : array([0.13623492, 0.18062024, 0.13553082])
yellow : array([0.73088905, 0.62177441, 0.02548927])
magenta : array([0.34280970, 0.20770559, 0.10214220])
neutral 5 (.70 D) : array([0.20988974, 0.19141324, 0.06866269])


ColorChecker 2005 "XYZ" Adapted to "E"

red : array([0.21781186, 0.12541048, 0.04697113])
green : array([0.15434689, 0.22960951, 0.09620221])
blue : array([0.07683480, 0.06006092, 0.25833845])
cyan : array([0.14893167, 0.19487065, 0.37427698])
yellow : array([0.59874058, 0.59196415, 0.08899633])
magenta : array([0.31991986, 0.20277158, 0.28536138])
neutral 5 (.70 D) : array([0.19126715, 0.19151544, 0.19291812])


ColorChecker 2005 "XYZ" Adapted to "F2"

red : array([0.22545552, 0.12877805, 0.03103172])
green : array([0.15832594, 0.23204226, 0.06406107])
blue : array([0.06385467, 0.05509729, 0.17506386])
cyan : array([0.13364947, 0.18951306, 0.25307753])
yellow : array([0.62718558, 0.60525456, 0.05690008])
magenta : array([0.31720246, 0.20226568, 0.19243480])
neutral 5 (.70 D) : array([0.18952683, 0.19147512, 0.12987334])


Luminance "XYZ" Adapted to "D65"

red : 12.19722535
green : 23.04276781
blue : 6.15720079
cyan : 19.79907683
yellow : 58.67162787
magenta : 20.02415243
neutral 5 (.70 D) : 19.15366501


Luminance "XYZ" Adapted to "D50"

red : 12.57000000
green : 23.18000000
blue : 5.75000000
cyan : 19.30000000
yellow : 59.81000000
magenta : 20.09000000
neutral 5 (.70 D) : 19.15000000


Luminance "XYZ" Adapted to "A"

red : 13.76513858
green : 23.11117127
blue : 4.99254109
cyan : 18.06202404
yellow : 62.17744084
magenta : 20.77055938
neutral 5 (.70 D) : 19.14132354


Luminance "XYZ" Adapted to "E"

red : 12.54104823
green : 22.96095053
blue : 6.00609174
cyan : 19.48706483
yellow : 59.19641488
magenta : 20.27715822
neutral 5 (.70 D) : 19.15154358


Luminance "XYZ" Adapted to "F2"

red : 12.87780528
green : 23.20422641
blue : 5.50972884
cyan : 18.95130571
yellow : 60.52545632
magenta : 20.22656850
neutral 5 (.70 D) : 19.14751195


ColorChecker 2005 "sRGB - Linear" under "D65"

red : array([0.45620519, 0.03081071, 0.04091952])
green : array([0.05433312, 0.29879493, 0.07185472])
blue : array([0.01862364, 0.05140184, 0.28880425])
cyan : array([-0.03667845, 0.24755074, 0.39815738])
yellow : array([0.85356364, 0.56517342, 0.01475279])
magenta : array([0.53522616, 0.09013008, 0.30472718])
neutral 5 (.70 D) : array([0.19002735, 0.19183638, 0.19312568])


ColorChecker 2005 "sRGB - OETF" under "D65"

red : array([0.70573936, 0.19248268, 0.22354168])
green : array([0.25847007, 0.58276101, 0.29718877])
blue : array([0.14565317, 0.25130933, 0.57378757])
cyan : array([-0.47388561, 0.53467479, 0.66380090])
yellow : array([0.93264474, 0.77675390, 0.12708884])
magenta : array([0.75809823, 0.33206288, 0.58800664])
neutral 5 (.70 D) : array([0.47315229, 0.47524148, 0.47672343])


ColorChecker 2005 "Munsell Value"

red : 4.08244375
green : 5.39132685
blue : 2.97619312
cyan : 5.06675596
yellow : 8.04387670
magenta : 5.10225899
neutral 5 (.70 D) : 4.98656896


ColorChecker 2005 "ASTM D1535-08e1 Luminance"

red : 12.23634268
green : 22.89399987
blue : 6.29022535
cyan : 19.86282567
yellow : 58.37987916
magenta : 20.18160934
neutral 5 (.70 D) : 19.15426585