sharpen.java

jdk-6u10-docs java开发宝典

/*
 * Copyright 2002 Sun Microsystems, Inc. All  Rights Reserved.
 *  
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following 
 * conditions are met:
 * 
 * -Redistributions of source code must retain the above copyright  
 *  notice, this list of conditions and the following disclaimer.
 * 
 * -Redistribution in binary form must reproduce the above copyright 
 *  notice, this list of conditions and the following disclaimer in 
 *  the documentation and/or other materials provided with the 
 *  distribution.
 *  
 * Neither the name of Sun Microsystems, Inc. or the names of 
 * contributors may be used to endorse or promote products derived 
 * from this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any 
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY 
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY 
 * DAMAGES OR LIABILITIES  SUFFERED BY LICENSEE AS A RESULT OF OR 
 * RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR 
 * ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE 
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 * SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER 
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF 
 * THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *  
 * You acknowledge that Software is not designed, licensed or 
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 */

import java.awt.*;
import java.applet.Applet;
import java.awt.image.*;
import java.awt.geom.AffineTransform;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;


public class Sharpen extends Applet {

    private BufferedImage bi;
    float[] elements = { 0.0f, -1.0f, 0.0f,
                         -1.0f,  5.f, -1.0f,
                         0.0f, -1.0f,  0.0f};

    public Sharpen() {
	    setBackground(Color.white);
            Image img = getToolkit().getImage("images/bld.jpg");
            try {
                MediaTracker tracker = new MediaTracker(this);
                tracker.addImage(img, 0);
                tracker.waitForID(0);
            } catch (Exception e) {}
            int iw = img.getWidth(this);
            int ih = img.getHeight(this);
            bi = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
            Graphics2D big = bi.createGraphics();
            big.drawImage(img,0,0,this);
    }

    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        int w = getSize().width;
        int h = getSize().height;
        int bw = bi.getWidth(this);
        int bh = bi.getHeight(this);

	AffineTransform at = new AffineTransform();
	at.scale(w/2.0/bw, h/1.0/bh);

	BufferedImageOp biop = null;
	BufferedImage bimg = new BufferedImage(bw,bh,BufferedImage.TYPE_INT_RGB);

        Kernel kernel = new Kernel(3,3,elements);
        ConvolveOp cop = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);
	cop.filter(bi,bimg);
	biop = new AffineTransformOp(at, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);

	g2.drawImage(bi, biop, 0, 0);
      	g2.drawImage(bimg, biop, w/2+3,0); 

    }

    public static void main(String s[]) {
	WindowListener l = new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	};
	Frame f = new Frame("Sharpen");
	f.addWindowListener(l);
	f.add("Center", new Sharpen());
	f.pack();
	f.setSize(new Dimension(600, 300));
	f.show();
    }
}