NEED EDGE DETECTION IN COLOR IMAGES IMPLEMENTED IN JAVA

i need edge detection using

EDGE DETECTION METHODS:-

SOBEL operators

Laplacian-of-Gaussian (LoG) filter

Castan edge operators, Gradient method

Castan edge operators, Zero-crossings method

PSEUDO-LAPLACE operators

Morphological Edge operator

Difference-of-Gaussian (DoG) filter

KIRSCH operators

Deriche Edge Operator

Contra-harmonic Filter

i need code for atleast any two of them or best of them.can u clarify about my previous question i.e have u presented the complete edge detection code in u'r first reply.iam new to java platform if u don't mine can u give the complete code from IMPORT to LAST SENTENCE.PLEASE HELP ME

lavakusareddya at 2007-7-14 22:35:46 >

hey! if u r looking for sobel edge detection code, there u go (the code is not commented, so if u want to ask something, just do it) =D

import java.applet.*;

import java.awt.*;

import java.awt.image.*;

import java.net.*;

import java.util.*;

import java.io.*;

public class Sobel extends Thread{

private int d_w;

private int d_h;

private int[]dest_1d;

public int[] aplicar_sobel(int[] src_1d, int width, int height, double sobscale,float offsetval){

int i_w = width;

int i_h = height;

d_w = width;

d_h = height;

dest_1d = new int[d_w * d_h];

for(int i=0;i<src_1d.length;i++){

try {

int bl = 0x000000ff;

int a = src_1d[i] & bl;

int b = src_1d[i+ 1] & bl;

int c = src_1d[i+ 2] & bl;

int d = src_1d[i + i_w] & bl;

int e = src_1d[i + i_w + 2] & bl;

int f = src_1d[i + 2*i_w ] & bl;

int g = src_1d[i + 2*i_w + 1] & bl;

int h = src_1d[i + 2*i_w + 2] & bl;

int hor = (a+d+f) - (c+e+h);

if (hor >< 0) hor = -hor;

int vert = (a+b+c) - (f+g+h);

if (vert < 0) vert = -vert;

short gc = (short) (sobscale * (hor + vert));

gc = (short) (gc + offsetval);

if (gc > 255) gc = 255;

dest_1d[i] = 0xff000000 | gc<<16 | gc<<8 | gc;

if (((i+3)%i_w)==0) {

dest_1d[i] = 0;

dest_1d[i+1] = 0;

dest_1d[i+2] = 0;

i+=3;

}

} catch (ArrayIndexOutOfBoundsException e) {

i = src_1d.length;

}

}

return dest_1d;

}

}

dave_wizarda at 2007-7-14 22:35:46 >