def YCbCr2100Const(xyz, saturation, white_point):
wp = np.array(white_point)
bt2020 = colour.RGB_COLOURSPACES['ITU-R BT.2020']
data = 100 * colour.XYZ_to_RGB(xyz,
wp,
bt2020.whitepoint,
bt2020.XYZ_to_RGB_matrix,
'CAT02',
cctf_encoding=None)
data = colour.RGB_to_ICTCP(data)
data[..., 1] = saturation * data[..., 1]
data[..., 2] = saturation * data[..., 2]
data = colour.ICTCP_to_RGB(data)
return 0.01 * colour.RGB_to_XYZ(data,
bt2020.whitepoint,
wp,
bt2020.RGB_to_XYZ_matrix,
'CAT02',
cctf_encoding=None)
# -*- coding: utf-8 -*-
"""
Showcases *ICTCP* *colour encoding* computations.
"""
import numpy as np
import colour
from colour.utilities import message_box
message_box('"ICTCP" Colour Encoding Computations')
RGB = np.array([0.45620519, 0.03081071, 0.04091952])
message_box(('Converting from "ITU-R BT.2020" colourspace to "ICTCP" colour '
'encoding given "RGB" values:\n'
'\n\t{0}'.format(RGB)))
print(colour.RGB_to_ICTCP(RGB))
print('\n')
ICTCP = np.array([0.07351364, 0.00475253, 0.09351596])
message_box(('Converting from "ICTCP" colour encoding to "ITU-R BT.2020" '
'colourspace given "ICTCP" values:\n'
'\n\t{0}'.format(ICTCP)))
print(colour.ICTCP_to_RGB(ICTCP))
def convertData(xyz):
data = 100 * colour.XYZ_to_RGB(xyz, wp, bt2020.whitepoint, bt2020.XYZ_to_RGB_matrix, 'CAT02', cctf_encoding=None)
return colour.RGB_to_ICTCP(data)
output = np.zeros((resolution ** 3, 3))
divisor = 1.0 / (resolution - 1)
for r in range(resolution):
for g in range(resolution):
for b in range(resolution):
idx = r * resolution * resolution + g * resolution + b
output[idx, 0] = r * divisor
output[idx, 1] = g * divisor
output[idx, 2] = b * divisor
if not transfer_curve is None:
output = transfer_curve(output)
return output
bt2020 = colour.RGB_COLOURSPACES['ITU-R BT.2020']
itur_bt709_hull = createHull(transfer_curve=lambda x: colour.RGB_to_YCbCr(x, out_legal=False))
ictcp_hull = createHull(transfer_curve=lambda x: colour.RGB_to_ICTCP(colour.models.rgb.transfer_functions.st_2084.eotf_ST2084(x * colour.models.rgb.transfer_functions.st_2084.eotf_inverse_ST2084(1000))))
jzazbz_hull = createHull(transfer_curve=lambda x: colour.XYZ_to_JzAzBz(colour.RGB_to_XYZ(colour.models.rgb.transfer_functions.st_2084.eotf_ST2084(x * colour.models.rgb.transfer_functions.st_2084.eotf_inverse_ST2084(1000)),
bt2020.whitepoint,
bt2020.whitepoint,
bt2020.RGB_to_XYZ_matrix,
None,
None)))
colors = ['r', 'g', 'b', 'c', 'm', 'y']
line_style = ['--', '-.']
line_point_marker = '+'
scatter_marker = ['o', '*', 'x']
hue_line_color = '0.65'
hue_line_style = ':'
hue_point_style = '.'