message_box('"CAM16" Colour Appearance Model Computations')
XYZ = np.array([19.01, 20.00, 21.78])
XYZ_w = np.array([95.05, 100.00, 108.88])
L_A = 318.31
Y_b = 20.0
surround = colour.CAM16_VIEWING_CONDITIONS['Average']
message_box(
('Converting to "CAM16" colour appearance model specification '
'using given parameters:\n'
'\n\tXYZ: {0}\n\tXYZ_w: {1}\n\tL_A: {2}\n\tY_b: {3}'
'\n\tSurround: {4}\n\n'
'Warning: The input domain of that definition is non standard!').format(
XYZ, XYZ_w, L_A, Y_b, surround))
specification = colour.XYZ_to_CAM16(XYZ, XYZ_w, L_A, Y_b, surround)
print(specification)
print('\n')
J = 41.73120791
C = 0.10335574
h = 217.06795977
specification = colour.CAM16_Specification(J, C, h)
message_box(
('Converting to "CIE XYZ" tristimulus values using given '
'parameters:\n'
'\n\tJ: {0}\n\tC: {1}\n\th: {2}\n\tXYZ_w: {3}\n\tL_A: {4}'
'\n\tY_b: {5}\n\n'
'Warning: The output range of that definition is non standard!').format(
J, C, h, XYZ_w, L_A, Y_b))
)
)
print("\n")
RGB = np.array([0.45675795, 0.30986982, 0.24861924])
message_box(
f'Converting to the "CAM16-UCS" colourspace from given "Output-Referred" '
f'"sRGB" colourspace values:\n\n\t{RGB}'
)
print(colour.convert(RGB, "Output-Referred RGB", "CAM16UCS"))
specification = colour.XYZ_to_CAM16(
colour.sRGB_to_XYZ(RGB) * 100,
XYZ_w=colour.xy_to_XYZ(
colour.CCS_ILLUMINANTS["CIE 1931 2 Degree Standard Observer"]["D65"]
)
* 100,
L_A=64 / np.pi * 0.2,
Y_b=20,
)
print(
colour.JMh_CAM16_to_CAM16UCS(
colour.utilities.tstack(
[
specification.J,
specification.M,
specification.h,
]
)
)
/ 100
print(colour.convert(sd, 'Spectral Distribution', 'sRGB'))
print(
colour.XYZ_to_sRGB(
colour.sd_to_XYZ(sd, illuminant=colour.ILLUMINANTS_SDS['D65']) / 100))
print('\n')
RGB = np.array([0.45675795, 0.30986982, 0.24861924])
message_box(('Converting to "CAM16-UCS" colourspace from given '
'"Output-Referred" "sRGB" colourspace values:\n'
'\n\t{0}'.format(RGB)))
print(colour.convert(RGB, 'Output-Referred RGB', 'CAM16UCS'))
specification = colour.XYZ_to_CAM16(
colour.sRGB_to_XYZ(RGB) * 100,
XYZ_w=colour.xy_to_XYZ(
colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D65']) *
100,
L_A=64 / np.pi * 0.2,
Y_b=20)
print(
colour.JMh_CAM16_to_CAM16UCS(
colour.utilities.tstack([
specification.J,
specification.M,
specification.h,
])) / 100)
print('\n')
Jpapbp = np.array([0.39994811, 0.09206558, 0.0812752])
message_box(('Converting to "Output-Referred" "sRGB" colourspace from given '