org.openimaj.image.processing.transform

Class PiecewiseMeshWarp<T,I extends Image<T,I>>

java.lang.Object

org.openimaj.image.processing.transform.PiecewiseMeshWarp<T,I>

Type Parameters:

T - the pixel type

I - the actual image of the concrete subclass

All Implemented Interfaces:

ImageProcessor<I>, Processor<I>

public class PiecewiseMeshWarp<T,I extends Image<T,I>>
extends Object
implements ImageProcessor<I>

Implementation of a piecewise warp. The warp can be piecewise affine, piecewise homographic or a mixture of the two. Basically this means you can warp images represented by triangles, quads or a mixture of the two.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Constructor Summary

Constructors

Constructor and Description
PiecewiseMeshWarp(List<Pair<Shape>> matchingRegions) Construct the warp with a list of matching shapes (which must be either quads or triangles).

Method Summary

Modifier and Type	Method and Description
Shape	getMatchingShape(Point2d p) Get the shape in the observation space for a point in the canonical space.
int	getMatchingShapeIndex(Point2d p) Get the shape pair index for a point in the canonical space.
protected Jama.Matrix	getTransform(Point2d p)
protected Jama.Matrix	getTransform3(List<Pair<Point2d>> pts)
protected Jama.Matrix	getTransform4(List<Pair<Point2d>> pts)
protected void	initTransforms()
protected List<Pair<Point2d>>	polyMatchToPointsMatch(Polygon pa, Polygon pb)
void	processImage(I image) Process an image.
I	transform(I image, int width, int height) Transform the content of the input image into an output image of the given dimensions.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PiecewiseMeshWarp

public PiecewiseMeshWarp(List<Pair<Shape>> matchingRegions)

Construct the warp with a list of matching shapes (which must be either quads or triangles). The pairs map from the measured/observed space to the canonical space.

Parameters:

matchingRegions - the matching shapes

Method Detail

getTransform

protected final Jama.Matrix getTransform(Point2d p)

getMatchingShape

public Shape getMatchingShape(Point2d p)

Get the shape in the observation space for a point in the canonical space.

Parameters:

p - point in the canonical space.

Returns:

the matching shape in observed space

getMatchingShapeIndex

public int getMatchingShapeIndex(Point2d p)

Get the shape pair index for a point in the canonical space.

Parameters:

p - the point in canonical space.

Returns:

the index of the matching point pair

initTransforms

protected void initTransforms()

polyMatchToPointsMatch

protected List<Pair<Point2d>> polyMatchToPointsMatch(Polygon pa,
                                                     Polygon pb)

getTransform4

protected Jama.Matrix getTransform4(List<Pair<Point2d>> pts)

getTransform3

protected Jama.Matrix getTransform3(List<Pair<Point2d>> pts)

processImage

public void processImage(I image)

Description copied from interface: ImageProcessor

Process an image. Implementing classes must alter the image passed in-place or assign the output to the input using Image.internalAssign(Image).

Specified by:

processImage in interface ImageProcessor<I extends Image<T,I>>

Parameters:

image - The image to process in place.

transform

public I transform(I image,
                   int width,
                   int height)

Transform the content of the input image into an output image of the given dimensions.

Parameters:

image - the input image

width - the output width

height - the output height

Returns:

the output image