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Fix colorscale issue with latest Pillow version #2

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Fix colorscale issue with latest Pillow version #2

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14 changes: 11 additions & 3 deletions src/visualizer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -101,9 +101,17 @@ def encode_image(self, raw_image):
bit_image = Image.fromarray(raw_image).convert('P', palette='WEB', dither=None)
# bit_image = Image.fromarray(raw_image.clip(0, 254)).convert(
# 'P', palette='WEB', dither=None)
colorscale = [
[i / 255.0, 'rgb({}, {}, {})'.format(*rgb)] for i, rgb in enumerate(idx_to_color)]


# In latest version of Pillow (10.4.0), getpalette() is modified to always have length 256
# This breaks the old colorscale generation code, but this code fixes it
# https://github.com/python-pillow/Pillow/issues/7561
colorscale = []
for i in range(256):
rgb = idx_to_color[i] if i < len(idx_to_color) else (0, 0, 0)
colorscale.append([i/255.0, "rgb({}, {}, {})".format(*rgb)])
# colorscale = [
# [i / 255.0, 'rgb({}, {}, {})'.format(*rgb)] for i, rgb in enumerate(idx_to_color)]

return bit_image, colorscale


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