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30 lines
668 B
Python
30 lines
668 B
Python
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import bz2
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import pickle
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import dither
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import colour.difference
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import numpy as np
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COLOURS = 256
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def nearest_colours():
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diffs = np.empty((COLOURS ** 3, 16), dtype=np.float32)
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all_rgb = np.array(tuple(np.ndindex(COLOURS, COLOURS, COLOURS)),
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dtype=np.uint8)
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all_srgb = dither.linear_to_srgb_array(all_rgb / 255)
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all_xyz = colour.sRGB_to_XYZ(all_srgb)
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all_lab = colour.XYZ_to_Lab(all_xyz)
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for i, p in dither.LAB.items():
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print(i)
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diffs[:, i] = colour.difference.delta_E_CIE2000(all_lab, p)
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return diffs
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n = nearest_colours()
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with bz2.open("nearest.pickle.bz2", "wb") as f:
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pickle.dump(n, f)
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