ImageTransform Module (original) (raw)
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The ImageTransform module contains implementations ofImageTransformHandler for some of the builtinImage.Transform methods.
class PIL.ImageTransform.Transform(data: Sequence[Any])[source]¶
Bases: ImageTransformHandler
Base class for other transforms defined in ImageTransform.
getdata() → tuple[Transform, Sequence[int]][source]¶
transform(size: tuple[int, int], image: Image, **options: Any) → Image[source]¶
Perform the transform. Called from Image.transform().
class PIL.ImageTransform.AffineTransform(data: Sequence[Any])[source]¶
Bases: Transform
Define an affine image transform.
This function takes a 6-tuple (a, b, c, d, e, f) which contain the first two rows from the inverse of an affine transform matrix. For each pixel (x, y) in the output image, the new value is taken from a position (a x + 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 original image.
Parameters:
matrix – A 6-tuple (a, b, c, d, e, f) containing the first two rows from the inverse of an affine transform matrix.
class PIL.ImageTransform.PerspectiveTransform(data: Sequence[Any])[source]¶
Bases: 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.
Parameters:
matrix – An 8-tuple (a, b, c, d, e, f, g, h).
class PIL.ImageTransform.ExtentTransform(data: Sequence[Any])[source]¶
Bases: Transform
Define a transform to extract a subregion from an image.
Maps a rectangle (defined by two corners) from the image to a rectangle of the given size. The resulting image will contain data sampled from between the corners, such that (x0, y0) in the input image will end up at (0,0) in the output image, and (x1, y1) at size.
This method can be used to crop, stretch, shrink, or mirror an arbitrary rectangle in the current image. It is slightly slower than crop, but about as fast as a corresponding resize operation.
Parameters:
bbox – A 4-tuple (x0, y0, x1, y1) which specifies two points in the input image’s coordinate system. See Coordinate System.
class PIL.ImageTransform.QuadTransform(data: Sequence[Any])[source]¶
Bases: Transform
Define a quad image transform.
Maps a quadrilateral (a region defined by four corners) from the image to a rectangle of the given size.
Parameters:
xy – An 8-tuple (x0, y0, x1, y1, x2, y2, x3, y3) which contain the upper left, lower left, lower right, and upper right corner of the source quadrilateral.
class PIL.ImageTransform.MeshTransform(data: Sequence[Any])[source]¶
Bases: Transform
Define a mesh image transform. A mesh transform consists of one or more individual quad transforms.
Parameters:
data – A list of (bbox, quad) tuples.