piecewiseaffinetransform

PiecewiseAffineTransform

class skimage.transform.PiecewiseAffineTransform [source]

Bases: skimage.transform._geometric.GeometricTransform

2D piecewise affine transformation.

Control points are used to define the mapping. The transform is based on a Delaunay triangulation of the points to form a mesh. Each triangle is used to find a local affine transform.

Attributes

affines	(list of AffineTransform objects) Affine transformations for each triangle in the mesh.
inverse_affines	(list of AffineTransform objects) Inverse affine transformations for each triangle in the mesh.

__init__() [source]

estimate(src, dst) [source]

Set the control points with which to perform the piecewise mapping.

Number of source and destination coordinates must match.

Parameters:	src : (N, 2) array Source coordinates. dst : (N, 2) array Destination coordinates.
Returns:	success : bool True, if model estimation succeeds.

inverse(coords) [source]

Apply inverse transformation.

Coordinates outside of the mesh will be set to - 1.

Parameters:	coords : (N, 2) array Source coordinates.
Returns:	coords : (N, 2) array Transformed coordinates.