ij.plugin
Class ContrastEnhancer

java.lang.Object
  ij.plugin.ContrastEnhancer

All Implemented Interfaces:

Measurements, PlugIn

public class ContrastEnhancer
extends java.lang.Object
implements PlugIn, Measurements

Implements ImageJ's Process/Enhance Contrast command.

Field Summary

Fields inherited from interface ij.measure.Measurements

AREA, AREA_FRACTION, CENTER_OF_MASS, CENTROID, CIRCULARITY, ELLIPSE, FERET, INTEGRATED_DENSITY, INVERT_Y, KURTOSIS, LABELS, LIMIT, MAX_STANDARDS, MEAN, MEDIAN, MIN_MAX, MODE, PERIMETER, RECT, SCIENTIFIC_NOTATION, SHAPE_DESCRIPTORS, SKEWNESS, SLICE, STACK_POSITION, STD_DEV

Constructor Summary

ContrastEnhancer()

Method Summary

void	equalize(ImagePlus imp)
void	equalize(ImageProcessor ip) Changes the tone curves of images.
void	run(java.lang.String arg) This method is called when the plugin is loaded.
void	stretchHistogram(ImagePlus imp, double saturated)
void	stretchHistogram(ImageProcessor ip, double saturated)
void	stretchHistogram(ImageProcessor ip, double saturated, ImageStatistics stats)

Methods inherited from class java.lang.Object

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

Constructor Detail

ContrastEnhancer

public ContrastEnhancer()

Method Detail

run

public void run(java.lang.String arg)

Description copied from interface: PlugIn

This method is called when the plugin is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt.

Specified by:

run in interface PlugIn

stretchHistogram

public void stretchHistogram(ImagePlus imp,
                             double saturated)

stretchHistogram

public void stretchHistogram(ImageProcessor ip,
                             double saturated)

stretchHistogram

public void stretchHistogram(ImageProcessor ip,
                             double saturated,
                             ImageStatistics stats)

equalize

public void equalize(ImagePlus imp)

equalize

public void equalize(ImageProcessor ip)

Changes the tone curves of images. It should bring up the detail in the flat regions of your image. Histogram Equalization can enhance meaningless detail and hide important but small high-contrast features. This method uses a similar algorithm, but uses the square root of the histogram values, so its effects are less extreme. Hold the alt key down to use the standard histogram equalization algorithm. This code was contributed by Richard Kirk (rak@cre.canon.co.uk).