org.jmage.filter.spatial
Class UnsharpMaskFilter

java.lang.Object
  org.jmage.filter.spatial.ConvolutionFilter
      org.jmage.filter.spatial.Convolution3x3Filter
          org.jmage.filter.spatial.UnsharpMaskFilter

All Implemented Interfaces:

ImageFilter

public class UnsharpMaskFilter
extends Convolution3x3Filter

UnsharpMaskFilter creates a blurred version of the original image, using the Mean Filter. It then subtracts this blurred version from the original image, resulting in a contrast enhanced version. This contrast enhanced version gets added to the original image to achieve a sharpening effect, also known as "Unsharp Mask".

Field Summary

protected static org.apache.log4j.Logger

log

Constructor Summary

UnsharpMaskFilter()
Initialize the ImageFilter

Method Summary

javax.media.jai.PlanarImage

filter(javax.media.jai.PlanarImage image) Filter the image

Methods inherited from class org.jmage.filter.spatial.ConvolutionFilter

normalize

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static org.apache.log4j.Logger log

Constructor Detail

UnsharpMaskFilter

public UnsharpMaskFilter()

Initialize the ImageFilter

Method Detail

filter

public javax.media.jai.PlanarImage filter(javax.media.jai.PlanarImage image)
                                   throws FilterException

Filter the image

Specified by:

filter in interface ImageFilter

Overrides:

filter in class Convolution3x3Filter

Parameters:

image - the image

Returns:

the filtered image

Throws:

FilterException - if an error occurs during filtering