displaypicturepanel.java

Java 多媒体技术(附源码) Java 3D API JavaSound API 各种格式的多媒体数据文件 JBuilder开发环境

package displaypicture;

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

/**
 * <p>Title: DisplayPicture</p>
 * <p>Description: 应用Java 2D API显示图像</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: 北京师范大学计算机系</p>
 * @author 彭 波
 * @version 1.0
 */

public class DisplayPicturePanel extends JPanel {
  private Image img;
  public int w;
  public int h;
/*  float[] data = {
	0.0625f,0.125f,0.0625f,
	0.125f,0.125f,0.125f,
	0.0625f,0.125f,0.0625f
  };
  */
  	float data = 1.0f/9.0f;
	float[] elements = new float[9];

  public DisplayPicturePanel(){
    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+60,h);
	for (int i = 0; i < 9; i++) {
	  elements[i] = data;
        }

  }

  public void paintComponent(Graphics g){
    super.paintComponent(g);
    BufferedImage bi = new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
    Graphics2D big = bi.createGraphics();
    big.drawImage(img,0,0,this);
    big.drawRect(w/4, h/4, w/2, h/2);
    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(bimg, 30, 0, null);
  }
}