picturefilterpanel.java

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package picturefilter;

import java.awt.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.JPanel;

/**
 * <p>Title: PictureFilter</p>
 * <p>Description: 应用Java 2D API进行图像过滤处理</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: 中国农业大学计算机系</p>
 * @author 彭  波
 * @version 1.0
 */

public class PictureFilterPanel extends JPanel {
  private Image img;
  public int w;
  public int h;
  float[] elements = {0.0f, -1.0f, 0.0f,-1.0f, 4.f, -1.0f,0.0f, -1.0f, 0.0f};
  public PictureFilterPanel(){
    img = getToolkit().getImage(ClassLoader.getSystemResource("boy.gif"));
        MediaTracker mt = new MediaTracker(this);
        //加载图片
        mt.addImage(img,0);

        try{
        //判断图片是否完全加载
          mt.waitForAll();

        }catch(Exception err){
          err.printStackTrace();
        }

    w = img.getWidth(this);
    h = img.getHeight(this);
    this.setSize(w*2,h);

  }

  public void paintComponent(Graphics g){
    super.paintComponent(g);
    BufferedImage bi = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
    Graphics2D big = bi.createGraphics();
    big.drawImage(img,0,0,this);
    BufferedImageOp biop = null;
    AffineTransform at = new AffineTransform();
    BufferedImage bimg = new BufferedImage(w,h, 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);
    Graphics2D g2d = (Graphics2D)g;

    g2d.drawImage(img, 0, 0, w, h, null);
    g2d.drawImage(bimg, w, 0, w, h, null);

//    g2d.drawImage(bimg,biop,0,0);
//    g2d.drawImage(bimg, 0, 0, null);
  }
}