Hue - Change

hue_change.py

from pprint import pprint

from colour import XYZ_to_CIECAM02, CIECAM02_VIEWING_CONDITIONS, sRGB_to_XYZ
from colour.models.deprecated import RGB_to_HSV

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 = CIECAM02_VIEWING_CONDITIONS['Average']

RGB = np.random.random(3)
RGB = np.array([0.1, 0.4, 1])

RGB_g, CIECAM02_H, HSV_H = [], [], []

for i in np.linspace(0.2, 2, 10):
    RGB_c = RGB ** i
    RGB_g.append(RGB_c)
    CIECAM02_H.append(XYZ_to_CIECAM02(sRGB_to_XYZ(RGB_c), XYZ_w, L_A, Y_b, surround).H)
    HSV_H.append(RGB_to_HSV(RGB_c)[0])

pprint(RGB_g)
pprint(CIECAM02_H)
pprint(HSV_H)

[array([ 0.63095734,  0.83255321,  1.        ]),
 array([ 0.39810717,  0.69314484,  1.        ]),
 array([ 0.25118864,  0.57707996,  1.        ]),
 array([ 0.15848932,  0.48044977,  1.        ]),
 array([ 0.1,  0.4,  1. ]),
 array([ 0.06309573,  0.33302128,  1.        ]),
 array([ 0.03981072,  0.27725794,  1.        ]),
 array([ 0.02511886,  0.23083198,  1.        ]),
 array([ 0.01584893,  0.19217991,  1.        ]),
 array([ 0.01,  0.16,  1.  ])]
[301.71022473499852,
 305.03754788563873,
 307.66791108080207,
 309.48266207966486,
 310.58957274037681,
 311.17908942211699,
 311.43581764636957,
 311.49370669850163,
 311.45041599570141,
 311.3719308524586]
[0.57562214922566479,
 0.58496948898334489,
 0.59413141546907522,
 0.60290030344435142,
 0.61111111111111105,
 0.61864938990436735,
 0.62545131735579618,
 0.63149774314357232,
 0.63680489319977196,
 0.64141414141414121]