Demo1

import java.awt.image.*;
import java.awt.color.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.JFrame;


public class Demo1 {
    public static void main(String [] args) {

	String filename = "test3.png";
	if (args.length>0) filename = args[0];

	showImage f1 = new showImage(filename);
	f1.setLocation(10,10);
	f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	int w = f1.getWidth();
	int h = f1.getHeight();

	int mask[][] = { {1, 2, 1},{2, 4, 2},{1, 2, 1} };
	Convolve c = new Convolve(mask);
	c.setScale(16);
	c.showMatrix(mask,"convolution mask");

	long start = System.nanoTime();
	BufferedImage out1 = c.doConvolve(f1.img);
	long etime = System.nanoTime() - start;
	double elapsed_time = 1e-6*(double)etime;
	System.out.format("%nElapsed time %g milliseconds%n",elapsed_time);

	showImage f2 = new showImage(out1,"my Convolve");
	f2.setLocation(200,10);
	
	float [] fm = {0.0625f, 0.125f, 0.0625f, 
		0.125f, 0.250f, 0.125f,
		 0.0625f, 0.125f, 0.0625f};
	Kernel k = new Kernel(3, 3, fm);
        ConvolveOp op = new ConvolveOp(k, ConvolveOp.EDGE_ZERO_FILL, null);

/*
* EDGE_NO_OP 
* Pixels at the edge of the source image are copied to the corresponding pixels in the destination without modification.
*
* EDGE_ZERO_FILL 
* Pixels at the edge of the destination image are set to zero. 
*/

	start = System.nanoTime();
	BufferedImage out2 = op.filter(f1.img,  null);
	etime = System.nanoTime() - start;
	elapsed_time = 1e-6*(double)etime;
	System.out.format("%nElapsed time %g milliseconds%n",elapsed_time);

	showImage f3 = new showImage(out2,"ConvolveOp");
	f3.setLocation(10,200);

	if (args.length==0) {
           listImage.listGray(f2.img,"My Convolve");
	   listImage.listGray(f3.img,"ConvolveOp");
        }
	else {
	   f2.writeImage("demo1a","jpg");
	   f3.writeImage("demo1b","jpg");
       }
		
    }
}