imagingbook.pub.regions

Class RegionContourLabeling

java.lang.Object

imagingbook.pub.regions.RegionLabeling

imagingbook.pub.regions.RegionContourLabeling

All Implemented Interfaces:

ContourTracer

public class RegionContourLabeling
extends RegionLabeling
implements ContourTracer

Binary region labeler based on a combined region labeling and contour tracing algorithm: F. Chang, C. J. Chen, and C. J. Lu. A linear-time component labeling algorithm using contour tracing technique. Computer Vision, Graphics, and Image Processing: Image Understanding 93(2), 206-220 (2004).

Version:

2016-11-08

Nested Class Summary

Nested classes/interfaces inherited from class imagingbook.pub.regions.RegionLabeling

RegionLabeling.BinaryRegion

Field Summary

Fields inherited from class imagingbook.pub.regions.RegionLabeling

currentLabel, height, ip, labelArray, maxLabel, regions, width

Constructor Summary

Constructors

Constructor and Description
RegionContourLabeling(ij.process.ByteProcessor ip) Creates a new region labeling.

Method Summary

Modifier and Type	Method and Description
List<Contour>	getInnerContours() Retrieves all inner contours of the associated region labeling.
List<Contour>	getInnerContours(boolean sort) Retrieves all inner contours of the associated region labeling.
int	getLabel(int u, int v) Get the label number for the specified image coordinate.
List<Contour>	getOuterContours() Retrieves all outer contours of the associated region labeling.
List<Contour>	getOuterContours(boolean sort) Retrieves all outer contours of the associated region labeling.
protected int[][]	initialize()
protected void	setLabel(int u, int v, int label)

Methods inherited from class imagingbook.pub.regions.RegionLabeling

findRegion, getRegion, getRegionPoints, getRegions, getRegions, makeLabelImage, makeRandomColor, resetLabel

Methods inherited from class java.lang.Object

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

Constructor Detail

RegionContourLabeling

public RegionContourLabeling(ij.process.ByteProcessor ip)

Creates a new region labeling.

Parameters:

ip - the binary input image with 0 values for background pixels and values > 0 for foreground pixels.

Method Detail

getOuterContours

public List<Contour> getOuterContours()

Description copied from interface: ContourTracer

Retrieves all outer contours of the associated region labeling.

Specified by:

getOuterContours in interface ContourTracer

Returns:

the list of outer contours.

getOuterContours

public List<Contour> getOuterContours(boolean sort)

Description copied from interface: ContourTracer

Retrieves all outer contours of the associated region labeling.

Specified by:

getOuterContours in interface ContourTracer

Parameters:

sort - set true to sort contours by (descending) length.

Returns:

the list of outer contours.

getInnerContours

public List<Contour> getInnerContours()

Description copied from interface: ContourTracer

Retrieves all inner contours of the associated region labeling.

Specified by:

getInnerContours in interface ContourTracer

Returns:

the list of inner contours.

getInnerContours

public List<Contour> getInnerContours(boolean sort)

Description copied from interface: ContourTracer

Retrieves all inner contours of the associated region labeling.

Specified by:

getInnerContours in interface ContourTracer

Parameters:

sort - set true to sort contours by (descending) length.

Returns:

the list of inner contours.

initialize

protected int[][] initialize()

Overrides:

initialize in class RegionLabeling

getLabel

public int getLabel(int u,
                    int v)

Description copied from class: RegionLabeling

Get the label number for the specified image coordinate.

Overrides:

getLabel in class RegionLabeling

Parameters:

u - the horizontal coordinate.

v - the vertical coordinate.

Returns:

the label number for the given position.

setLabel

protected void setLabel(int u,
                        int v,
                        int label)

Overrides:

setLabel in class RegionLabeling