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added assert for midpoint range

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tsennott 2018-07-06 19:09:57 -07:00
parent adf570a77e
commit 3c6fd275c8
1 changed files with 2 additions and 1 deletions
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src/PIL/ImageOps.py
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@ -154,10 +154,11 @@ def colorize(image, black, white, mid=None, midpoint=128):
:param black: The color to use for black input pixels.
:param white: The color to use for white input pixels.
:param mid: The color to use for midtone input pixels.
:param midpoint: the int value [0, 255] for the mid color.
:param midpoint: the int value in [1, 254] for the mid color.
:return: An image.
"""
assert image.mode == "L"
assert 1 <= midpoint <= 254
# Define colors from arguments
black = _color(black, "RGB")