jjil.algorithm
Class GrayHistMatch

java.lang.Object
  jjil.core.PipelineStage
      jjil.algorithm.GrayHistMatch

public class GrayHistMatch
extends PipelineStage

Pipeline stage modifies a gray image's pixel values to make its histogram match a target histogram (to the extent this is possible while uniquely mapping each input grayvalue). This PipelineStage modifies its input.

Author:

webb

Constructor Summary

GrayHistMatch(int[] histTarget)
Creates a new instance of GrayHistMatch

Method Summary

int[]	getHistogram() getHistogram returns the target histogram that has been previously set.
void	push(Image image) push transforms an input gray image to have the target histogram, as near as possible while assigning each input grayvalue a unique output grayvalue.
void	setHistogram(int[] histTarget) setHistogram sets a new target histogram.

Methods inherited from class jjil.core.PipelineStage

getFront, isEmpty

Methods inherited from class java.lang.Object

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

Constructor Detail

GrayHistMatch

public GrayHistMatch(int[] histTarget)
              throws Error

Creates a new instance of GrayHistMatch

Parameters:

histTarget - the input histogram.

Throws:

Error - if the input histogram does not have 256 elements.

Method Detail

getHistogram

public int[] getHistogram()

getHistogram returns the target histogram that has been previously set.

Returns:

the target histogram

push

public void push(Image image)
          throws Error

push transforms an input gray image to have the target histogram, as near as possible while assigning each input grayvalue a unique output grayvalue.

Specified by:

push in class PipelineStage

Parameters:

image - the input image.

Throws:

Error - if the input image is not gray.

setHistogram

public void setHistogram(int[] histTarget)
                  throws Error

setHistogram sets a new target histogram.

Parameters:

histTarget - the new target histogram

Throws:

Error - if histTarget does not have 256 elements.