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Use ImageOps.invert() when saving 1 mode TIFF with WhiteIsZero #10517

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Use ImageOps.invert() when saving 1 mode TIFF with WhiteIsZero #10517

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11 changes: 1 addition & 10 deletions src/PIL/TiffImagePlugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1953,16 +1953,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
if PHOTOMETRIC_INTERPRETATION not in ifd:
ifd[PHOTOMETRIC_INTERPRETATION] = photo
elif im.mode in ("1", "L") and ifd[PHOTOMETRIC_INTERPRETATION] == 0:
if im.mode == "1":
inverted_im = im.copy()
px = inverted_im.load()
if px is not None:
for y in range(inverted_im.height):
for x in range(inverted_im.width):
px[x, y] = 0 if px[x, y] == 255 else 255
im = inverted_im
else:
im = ImageOps.invert(im)
im = ImageOps.invert(im)

if im.mode in ["P", "PA"]:
lut = im.im.getpalette("RGB;L")
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