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Updated AffineTransform docstring to mention it uses the inverse matrix

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Andrew Murray 2025-02-06 19:26:49 +11:00
parent 2810d7c6ba
commit 41861e8e9f
1 changed files with 4 additions and 4 deletions
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src/PIL/ImageTransform.py
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@ -48,9 +48,9 @@ class AffineTransform(Transform):
Define an affine image transform. Define an affine image transform.
This function takes a 6-tuple (a, b, c, d, e, f) which contain the first This function takes a 6-tuple (a, b, c, d, e, f) which contain the first
two rows from an affine transform matrix. For each pixel (x, y) in the two rows from the inverse of an affine transform matrix. For each pixel
output image, the new value is taken from a position (a x + b y + c, (x, y) in the output image, the new value is taken from a position (a x +
d x + e y + f) in the input image, rounded to nearest pixel. b y + c, d x + e y + f) in the input image, rounded to nearest pixel.
This function can be used to scale, translate, rotate, and shear the This function can be used to scale, translate, rotate, and shear the
original image. original image.
@ -58,7 +58,7 @@ class AffineTransform(Transform):
See :py:meth:`.Image.transform` See :py:meth:`.Image.transform`
:param matrix: A 6-tuple (a, b, c, d, e, f) containing the first two rows :param matrix: A 6-tuple (a, b, c, d, e, f) containing the first two rows
from an affine transform matrix. from the inverse of an affine transform matrix.
""" """
method = Image.Transform.AFFINE method = Image.Transform.AFFINE