deformablemesh.util.connectedcomponents

Class ConnectedComponents2D

java.lang.Object

deformablemesh.util.connectedcomponents.ConnectedComponents2D

public class ConnectedComponents2D
extends Object

Connect components for 2D. Connectivity is assumed to be 4 fold, eg connected pixes are neighbors either directly above or below.

Constructor Summary

Constructors

Constructor and Description
ConnectedComponents2D(ij.process.ImageProcessor proc) Prepares a workspace for performing a connect components routine on the provided image.

Method Summary

Modifier and Type	Method and Description
int	get(int i)
int	get(int x, int y)
List<double[]>	getCentroids() Returns the centroids associated with this connected components.
int	getHeight()
List<int[]>	getLabelledPoints(int labelB)
Map<Integer,List<int[]>>	getRegions() A map of label -> region for all of the connected components.
int	getWidth()
void	label(int[] p, int label) Moves the unlabelled pixel to a labelled region.
static void	main(String[] args)
void	process() This method needs to be called before any of the centroids can be accessed.
void	removeRegion(int label) Removes a region from this cc2d by removing the label from the map, and setting all of the pixels associated with the provided label to 0.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConnectedComponents2D

public ConnectedComponents2D(ij.process.ImageProcessor proc)

Prepares a workspace for performing a connect components routine on the provided image. The image should already be thresholded, so any non-zero value will be treated as foreground, and 0 is background. This image will be modified.

Parameters:

proc - thresholded image that will be modified during processing.

Method Detail

process

public void process()

This method needs to be called before any of the centroids can be accessed.

getCentroids

public List<double[]> getCentroids()

Returns the centroids associated with this connected components. If this cc2d has not been process processed, then it will be.

Returns:

a list of center of regions.

get

public int get(int x,
               int y)

getRegions

public Map<Integer,List<int[]>> getRegions()

A map of label -> region for all of the connected components. If this cc2d has not been processed it will be processed. Otherwise it will return the previous results.

Returns:

Labe to Region.

removeRegion

public void removeRegion(int label)

Removes a region from this cc2d by removing the label from the map, and setting all of the pixels associated with the provided label to 0.

Parameters:

label -

main

public static void main(String[] args)

getWidth

public int getWidth()

getHeight

public int getHeight()

getLabelledPoints

public List<int[]> getLabelledPoints(int labelB)

get

public int get(int i)

label

public void label(int[] p,
                  int label)

Moves the unlabelled pixel to a labelled region. Add the int[] to the collection associated with the label. updates the backing workspace.

Parameters:

p - {x, y}

label - region to be associated with.