zhongzhi.java

使用JAVA程序语言

import java.awt.*;
import java.awt.image.*;
import java.applet.*;

public class zhongzhi extends Applet
{
 Image img,pic; 
 int wide,high; 
 int p[];
 int hist[]=new int[16];
 public  void init()
 {
 try
  {
   img=getImage(getDocumentBase(),"1.jpg");
   MediaTracker mt= new MediaTracker(this);//跟踪多种媒体对象状态
   mt.addImage(img,0);//向此媒体跟踪器正在跟踪的图像列表添加一个图像
   mt.waitForID(0);//开始加载由此媒体跟踪器跟踪且具有指定标识符的所有图像。
   wide=img.getWidth(null);
   high=img.getHeight(null);
   p=new int[wide*high];
   PixelGrabber grabber=new PixelGrabber(img,0,0,wide,high,p,0,wide);
   grabber.grabPixels();
  }catch(InterruptedException e){};
  
  for(int y=3;y<high;y+=3)
    for(int x=3;x<wide;x+=3)
    {
    int k=0;
  for(int i=x;i<x+3;i++)
   for(int j=y;j<y+3;j++)
   {
     int pixel=p[(j-1)*wide+i];
	 int r=0xff&(pixel>>16);
     int g=0xff&(pixel>>8);
     int b=0xff&(pixel);
	 hist[k++]=(int)(0.33*r+0.56*g+0.11*b);
   }
  for(int i=0;i<9;i++)
   for( int j=0;j<9-i;j++)
   {
    if(hist[j]>hist[j+1])
	{
	int t=hist[j];
	hist[j+1]=hist[j];
	hist[j+1]=t;
	}
   }
   int mid=hist[4];
   for(int i=x;i<x+3;i++)
     for(int j=y;j<y+3;j++)
	 {
   p[(j-1)*wide+i]=0xff000000|mid<<16|mid<<8|mid; 
   pic=createImage(new MemoryImageSource(wide,high,p,0,wide)) ;                  //根据指定的图像生成器创建一幅图像
	}
  }
 }
 
 public void paint (Graphics g)
 {
  g.drawImage(img,20,0,300,300,null);
  g.drawImage(pic,330,0,300,300,null);
 }
}