org.openimaj.image.contour

Class ContourFollowingStrategy

java.lang.Object

org.openimaj.image.contour.ContourFollowingStrategy

Direct Known Subclasses:

MooreNeighborStrategy, SuzukiNeighborStrategy

public abstract class ContourFollowingStrategy
extends Object

A contour Following strategy implements a Contour Tracing algorithm that extracts a boundary from an image

Many examples can be found in this tutorial.

Author:

Sina Samangooei (ss@ecs.soton.ac.uk)

Constructor Summary

Constructors

Constructor and Description
ContourFollowingStrategy()

Method Summary

Modifier and Type	Method and Description
List<org.openimaj.image.pixel.Pixel>	contour(org.openimaj.image.FImage image, org.openimaj.image.pixel.Pixel start, org.openimaj.image.pixel.Pixel from) Follow the contour, adding each pixel to a list.
abstract void	contour(org.openimaj.image.FImage image, org.openimaj.image.pixel.Pixel start, org.openimaj.image.pixel.Pixel from, org.openimaj.util.function.Operation<org.openimaj.image.pixel.Pixel> operation) Given some starting pixel in an image on a contour and the direction of a non starting image, return each pixel on a contour from the start pixel in the image.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContourFollowingStrategy

public ContourFollowingStrategy()

Method Detail

contour

public List<org.openimaj.image.pixel.Pixel> contour(org.openimaj.image.FImage image,
                                                    org.openimaj.image.pixel.Pixel start,
                                                    org.openimaj.image.pixel.Pixel from)

Follow the contour, adding each pixel to a list. The first pixel in the list is guaranteed to the be equal to start

Parameters:

image - the image

start - the starting point on the contour

from - the pixel that was not a contour

Returns:

a list of contour pixels in the image starting from the start pixel

contour

public abstract void contour(org.openimaj.image.FImage image,
                             org.openimaj.image.pixel.Pixel start,
                             org.openimaj.image.pixel.Pixel from,
                             org.openimaj.util.function.Operation<org.openimaj.image.pixel.Pixel> operation)

Given some starting pixel in an image on a contour and the direction of a non starting image, return each pixel on a contour from the start pixel in the image. The first pixel returned must be the start pixel

Parameters:

image - the image

start - the first point on the contour

from - the pixel that was not a contour

operation - the thing to do for each contour pixel found