diff --git a/Tests/test_image_transform.py b/Tests/test_image_transform.py index 15939ef647c..578a0a2967a 100644 --- a/Tests/test_image_transform.py +++ b/Tests/test_image_transform.py @@ -16,6 +16,8 @@ def test_sanity(self): transform = ImageTransform.AffineTransform(seq[:6]) im.transform((100, 100), transform) + transform = ImageTransform.PerspectiveTransform(seq[:8]) + im.transform((100, 100), transform) transform = ImageTransform.ExtentTransform(seq[:4]) im.transform((100, 100), transform) transform = ImageTransform.QuadTransform(seq[:8]) diff --git a/docs/reference/ImageTransform.rst b/docs/reference/ImageTransform.rst index 1278801821d..5b0a5ce49dc 100644 --- a/docs/reference/ImageTransform.rst +++ b/docs/reference/ImageTransform.rst @@ -19,6 +19,11 @@ The :py:mod:`~PIL.ImageTransform` module contains implementations of :undoc-members: :show-inheritance: +.. autoclass:: PerspectiveTransform + :members: + :undoc-members: + :show-inheritance: + .. autoclass:: ExtentTransform :members: :undoc-members: diff --git a/src/PIL/ImageTransform.py b/src/PIL/ImageTransform.py index 4f79500e64e..6aa82dadd9c 100644 --- a/src/PIL/ImageTransform.py +++ b/src/PIL/ImageTransform.py @@ -63,6 +63,26 @@ class AffineTransform(Transform): method = Image.Transform.AFFINE +class PerspectiveTransform(Transform): + """ + Define a perspective image transform. + + This function takes an 8-tuple (a, b, c, d, e, f, g, h). For each pixel + (x, y) in the output image, the new value is taken from a position + ((a x + b y + c) / (g x + h y + 1), (d x + e y + f) / (g x + h y + 1)) in + the input image, rounded to nearest pixel. + + This function can be used to scale, translate, rotate, and shear the + original image. + + See :py:meth:`.Image.transform` + + :param matrix: An 8-tuple (a, b, c, d, e, f, g, h). + """ + + method = Image.Transform.PERSPECTIVE + + class ExtentTransform(Transform): """ Define a transform to extract a subregion from an image.