# Module PIL.ImageTransform

#### Module Summary:

    class AffineTransform:
        def __init__(self, matrix)

> Define an affine image transform.

    class ExtentTransform:
        def __init__(self, bbox)

> Define a transform to extract a subregion from an image.

    class MeshTransform:
        def __init__(self, data)

> Define an mesh image transform.

    class QuadTransform:
        def __init__(self, xy)

> Define an quad image transform.

## Classes

### The AffineTransform Class

    AffineTransform(matrix)

Define an affine image transform.

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 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 an affine transform matrix.

### The ExtentTransform Class

    ExtentTransform(bbox)

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.

### The MeshTransform Class

    MeshTransform(data)

Define an mesh image transform. A mesh transform consists of one or more individual quad transforms.

#### Parameters:

`data` -- A list of (bbox, quad) tuples.

### The QuadTransform Class

    QuadTransform(xy)

Define an 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, y3, y3) which contain the upper left, lower left, lower right, and upper right corner of the source quadrilateral.