Ecualizacion de Imagenes

import ij.*;
import ij.process.*;
import ij.gui.*;
import java.awt.*;
import ij.plugin.filter.*;
public class Filtro_Ecua implements PlugInFilter
{
ImagePlus imp;public int setup(String arg, ImagePlus imp)
{
this.imp = imp;return DOES_ALL;
}
public void run(ImageProcessor ip)
{
int []H = ip.getHistogram();
int K1=255;
for (int a=1; a< H.length; a++)
{
H[a]=H[a-1]+H[a];
}
int f=ip.getWidth();
int c=ip.getHeight();
for(int i =0; i < f; i++)
{
for(int j= 0; j < c; j++)
{
int pixel =(int)(ip.getPixel(i, j));
pixel=H[pixel]*((K1-1)/(i*j));
ip.putPixel(i,j,pixel);
}
}
}
}