net.sourceforge.javaocr.filter
Class ThresholdFilter

java.lang.Object
  net.sourceforge.javaocr.filter.AbstractSinglePixelFilter
      net.sourceforge.javaocr.filter.ThresholdFilter

All Implemented Interfaces:

ImageFilter

public class ThresholdFilter
extends AbstractSinglePixelFilter

perform threshold filtering TODO: do we need to make this via threshold? Yep - 'if' is still faster than lookup in array

Author:

Konstantin Pribluda

Field Summary

private int	above
private int	below
(package private) int	threshold

Constructor Summary

ThresholdFilter(int threshold)
construct with threshold and default values for above / below ( 255 / 0 )

ThresholdFilter(int threshold, int above, int below)
construct with specified values for above and below

Method Summary

protected void

processPixel(Image image) process single image pixel subclass shall retrieve current pixel value with image.next() and store it with image.put() after processing

Methods inherited from class net.sourceforge.javaocr.filter.AbstractSinglePixelFilter

process

Methods inherited from class java.lang.Object

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

Field Detail

threshold

int threshold

above

private int above

below

private int below

Constructor Detail

ThresholdFilter

public ThresholdFilter(int threshold)

construct with threshold and default values for above / below ( 255 / 0 )

Parameters:

threshold - threshold value

ThresholdFilter

public ThresholdFilter(int threshold,
                       int above,
                       int below)

construct with specified values for above and below

Parameters:

threshold - threshold value

above - value to use for values strictly over the threshold

below - value to substitute for values below the threshold

Method Detail

processPixel

protected void processPixel(Image image)

Description copied from class: AbstractSinglePixelFilter

process single image pixel subclass shall retrieve current pixel value with image.next() and store it with image.put() after processing

Specified by:

processPixel in class AbstractSinglePixelFilter