Detector de Movimiento

import ij.IJ;
import ij.ImagePlus;
import ij.WindowManager;import ij.process.*;
import ij.gui.GenericDialog;
import java.awt.*;
import ij.plugin.filter.*;
public class Alpha_Blending implements PlugInFilter
{
magePlus fgIm = null;
static double alpha = 0.5;
public int setup(String arg, ImagePlus img)
{
return DOES_8G;
}
public void run(ImageProcessor bgIp)
{
if(runDialog())
{
ImageProcessor fgIp=fgIm.getProcessor().convertToByte(false);
fgIp = fgIp.duplicate();
bgIp.copyBits(fgIp, 0, 0, Blitter.DIFFERENCE);
int w=bgIp.getWidth();
int n=bgIp.getHeight();
for(int i =0; i < w;i++)
{
for(int j= 0; j < n;j++)
{
int p =bgIp.getPixel(i,j);
if (p <150){p=0;}else>=150){p=255;
}
bgIp.putPixel(i,j,p);
}
}
}
}
boolean runDialog()
{
int[] windowList = WindowManager.getIDList();
if (windowList == null)
{
IJ.noImage();
return false;
}
String[] windowTitles = new String[windowList.length];
for(int i = 0; i < windowList.length; i++)
{
ImagePlus im = WindowManager.getImage (windowList[i]);
if (im == null)windowTitles[i] = "untitled";
elsewindowTitles[i] = im.getShortTitle();
}
GenericDialog gd = new GenericDialog("Alpha Blending");
gd.addChoice("Foreground image: ", windowTitles, windowTitles[0]);
gd. addNumericField("Alpha value [0. . 1]: " , alpha, 2);
gd.showDialog();
if (gd.wasCanceled())
return false;
else
{
int fgIdx = gd.getNextChoiceIndex();
fgIm = WindowManager.getImage(windowList[fgIdx]);
alpha = gd.getNextNumber ();return true;
}
}
}