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Add support for 1-bit images to ImageOps.invert()

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Dov Grobgeld 2022-02-07 15:24:36 +02:00 committed by GitHub
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commit 9a78e37936
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src/PIL/ImageOps.py
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@ -520,6 +520,11 @@ def invert(image):
:param image: The image to invert. :param image: The image to invert.
:return: An image. :return: An image.
""" """
# Special case for 1-bit images using python translate() method
if image.mode == '1':
lut = bytearray(range(255,-1,-1))
return Image.frombuffer('1',image.size,image.tobytes().translate(lut))
lut = [] lut = []
for i in range(256): for i in range(256):
lut.append(255 - i) lut.append(255 - i)