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115 lines
3.6 KiB
ReStructuredText
115 lines
3.6 KiB
ReStructuredText
=============================
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The PIL.ImageTransform Module
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=============================
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The PIL.ImageTransform Module
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=============================
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**AffineTransform** (class)
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[`# <#PIL.ImageTransform.AffineTransform-class>`_]
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Define an affine image transform.
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*matrix*
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A 6-tuple (*a, b, c, d, e, f*) containing the first two rows
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from an affine transform matrix.
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For more information about this class, see `*The AffineTransform
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Class* <#PIL.ImageTransform.AffineTransform-class>`_.
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**ExtentTransform** (class)
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[`# <#PIL.ImageTransform.ExtentTransform-class>`_]
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Define a transform to extract a subregion from an image.
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*bbox*
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A 4-tuple (*x0, y0, x1, y1*) which specifies two points in the
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input image's coordinate system.
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For more information about this class, see `*The ExtentTransform
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Class* <#PIL.ImageTransform.ExtentTransform-class>`_.
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**MeshTransform** (class)
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[`# <#PIL.ImageTransform.MeshTransform-class>`_]
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Define an mesh image transform.
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*data*
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For more information about this class, see `*The MeshTransform
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Class* <#PIL.ImageTransform.MeshTransform-class>`_.
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**QuadTransform** (class)
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[`# <#PIL.ImageTransform.QuadTransform-class>`_]
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Define an quad image transform.
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*xy*
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An 8-tuple (*x0, y0, x1, y1, x2, y2, y3, y3*) which contain the
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upper left, lower left, lower right, and upper right corner of
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the source quadrilateral.
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For more information about this class, see `*The QuadTransform
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Class* <#PIL.ImageTransform.QuadTransform-class>`_.
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The AffineTransform Class
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-------------------------
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**AffineTransform** (class)
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[`# <#PIL.ImageTransform.AffineTransform-class>`_]
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Define an affine image transform.
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This function takes a 6-tuple (*a, b, c, d, e, f*) which contain the
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first two rows from an affine transform matrix. For each pixel (*x,
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y*) in the output image, the new value is taken from a position (a
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*x* + b *y* + c, d *x* + e *y* + f) in the input image, rounded to
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nearest pixel.
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This function can be used to scale, translate, rotate, and shear the
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original image.
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*matrix*
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A 6-tuple (*a, b, c, d, e, f*) containing the first two rows
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from an affine transform matrix.
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The ExtentTransform Class
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-------------------------
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**ExtentTransform** (class)
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[`# <#PIL.ImageTransform.ExtentTransform-class>`_]
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Define a transform to extract a subregion from an image.
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Maps a rectangle (defined by two corners) from the image to a
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rectangle of the given size. The resulting image will contain data
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sampled from between the corners, such that (*x0, y0*) in the input
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image will end up at (0,0) in the output image, and (*x1, y1*) at
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*size*.
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This method can be used to crop, stretch, shrink, or mirror an
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arbitrary rectangle in the current image. It is slightly slower than
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**crop**, but about as fast as a corresponding **resize** operation.
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*bbox*
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A 4-tuple (*x0, y0, x1, y1*) which specifies two points in the
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input image's coordinate system.
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The MeshTransform Class
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-----------------------
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**MeshTransform** (class)
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[`# <#PIL.ImageTransform.MeshTransform-class>`_]
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*data*
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The QuadTransform Class
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-----------------------
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**QuadTransform** (class)
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[`# <#PIL.ImageTransform.QuadTransform-class>`_]
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Define an quad image transform.
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Maps a quadrilateral (a region defined by four corners) from the
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image to a rectangle of the given size.
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*xy*
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An 8-tuple (*x0, y0, x1, y1, x2, y2, y3, y3*) which contain the
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upper left, lower left, lower right, and upper right corner of
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the source quadrilateral.
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