Apple-2-SW/ii-pix
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kris 2021-11-18 20:33:21 +00:00
parent 7609297f0d
commit 3159a09c27
1 changed files with 17 additions and 17 deletions
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34
precompute_conversion.py
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@ -14,23 +14,23 @@ def srgb_to_linear_array(a: np.ndarray, gamma=2.4) -> np.ndarray:
return np.where(a <= 0.04045, a / 12.92, ((a + 0.055) / 1.055) ** gamma)
def main():
# print("Precomputing conversion matrix from 24-bit RGB to CAM16UCS colour "
# "space")
# # Compute matrix of all 24-bit RGB values, normalized to 0..1 range
# bits24 = np.arange(2 ** 24, dtype=np.uint32).reshape(-1, 1)
# all_rgb24 = np.concatenate(
# [bits24 >> 16 & 0xff, bits24 >> 8 & 0xff, bits24 & 0xff],
# axis=1).astype(np.float32) / 255
# del bits24
#
# with colour.utilities.suppress_warnings(colour_usage_warnings=True):
# # Compute matrix of corresponding CAM16UCS colour values, indexed
# # by 24-bit RGB value
# rgb24_to_cam16ucs = colour.convert(all_rgb24, "RGB", "CAM16UCS").astype(
# np.float32)
# del all_rgb24
# np.save("data/rgb24_to_cam16ucs.npy", rgb24_to_cam16ucs)
# del rgb24_to_cam16ucs
print("Precomputing conversion matrix from 24-bit RGB to CAM16UCS colour "
"space")
# Compute matrix of all 24-bit RGB values, normalized to 0..1 range
bits24 = np.arange(2 ** 24, dtype=np.uint32).reshape(-1, 1)
all_rgb24 = np.concatenate(
[bits24 >> 16 & 0xff, bits24 >> 8 & 0xff, bits24 & 0xff],
axis=1).astype(np.float32) / 255
del bits24
with colour.utilities.suppress_warnings(colour_usage_warnings=True):
# Compute matrix of corresponding CAM16UCS colour values, indexed
# by 24-bit RGB value
rgb24_to_cam16ucs = colour.convert(all_rgb24, "RGB", "CAM16UCS").astype(
np.float32)
del all_rgb24
np.save("data/rgb24_to_cam16ucs.npy", rgb24_to_cam16ucs)
del rgb24_to_cam16ucs
print("Precomputing conversion matrix from 12-bit //gs RGB to CAM16UCS "
"colour space")