//MultiMedianImage.java
/* 程序说明：用多线程实现对图像的中值滤波调用MedianThread.java
作 者：lai
*/
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
class MultiMedianImage extends Frame
{
Image im,tmp;
int iw,ih;
int[] pixels;
boolean flag=false;
//构造方法
public MultiMedianImage(){
super("中值滤波");
Panel pdown;
Button load,run,save,quit;
//添加窗口监听事件
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
pdown = new Panel();
pdown.setBackground(Color.lightGray);
load=new Button("装载图像");
run = new Button("中值滤波");
save=new Button("保存");
quit=new Button("退出");
this.add(pdown,BorderLayout.SOUTH);
pdown.add(load);
pdown.add(run);
pdown.add(save);
pdown.add(quit);
load.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jLoad_ActionPerformed(e);
}
});
run.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jRun_ActionPerformed(e);
}
});
quit.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jQuit_ActionPerformed(e);
}
});
save.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jSave_ActionPerformed(e);
}
});
}
public void jLoad_ActionPerformed(ActionEvent e){
//利用MediaTracker跟踪图像的加载
MediaTracker tracker = new MediaTracker(this);
im=Toolkit.getDefaultToolkit().getImage("001.jpg");
tracker.addImage(im,0);
//等待图像的完全加载
try{
tracker.waitForID(0);
}catch(InterruptedException e2){ e2.printStackTrace();}
//获取图像的宽度iw和高度ih
iw=im.getWidth(this);
ih=im.getHeight(this);
pixels=new int[iw*ih];
try{
PixelGrabber pg=new PixelGrabber(im,0,0,iw,ih,pixels,0,iw);
pg.grabPixels();
}catch (InterruptedException e3) {
e3.printStackTrace();
}
//将数组中的象素产生一个图像
ImageProducer ip=new MemoryImageSource(iw,ih,pixels,0,iw);
tmp=createImage(ip);
flag=true;
repaint();
}
public void jRun_ActionPerformed(ActionEvent e){
if(flag){
//调用MedianThread.java进行多线程中值滤波
MedianThread mt=new MedianThread(iw,ih,im,pixels);
for(int i=1;i<ih;i++)
{
Thread thread=new Thread(mt);
thread.start();
}
pixels=mt.GetPixels();
//System.out.println(pixels.length);
//将数组中的象素产生一个图像
ImageProducer ip=new MemoryImageSource(iw,ih,pixels,0,iw);
tmp=createImage(ip);
flag=true;
repaint();
}else
{
JOptionPane.showMessageDialog(null,"请先打开一幅图片!",
"Alert",JOptionPane.WARNING_MESSAGE);
}
}
public void jSave_ActionPerformed(ActionEvent e){
//Save Image
if(flag){ }
else{
JOptionPane.showMessageDialog(null,"请先打开一幅图片!",
"Alert",JOptionPane.WARNING_MESSAGE);
}
}
public void jQuit_ActionPerformed(ActionEvent e){
//System.exit(0);
JOptionPane op =new JOptionPane();
int exit=op.showConfirmDialog(this,"你要退出吗? ? ?","退出",JOptionPane.YES_NO_OPTION);
if(exit==JOptionPane.YES_OPTION)
{
System.exit(0);
}else{ }
}
//调用paint()方法，显示图像信息。
public void paint(Graphics g){
if(flag){
g.drawImage(tmp,10,20,this);
}else { }
}
public static void main(String[] args)
{
MultiMedianImage mi = new MultiMedianImage();
mi.setLocation(50,50);
mi.setSize(500,400);
mi.setVisible(true);
}
}
class MedianThread implements Runnable
{
int pixels[];
int iw,ih,i;
Image im;
public MedianThread(int iw,int ih,Image im,int[] pixels)//final int i
{
//this.i=i;
this.iw=iw;
this.ih=ih;
this.im=im;
this.pixels=pixels;
}
public void run()
{
try{
PixelGrabber pg=new PixelGrabber(im,0,0,iw,ih,pixels,0,iw);
pg.grabPixels();
}catch (InterruptedException e3) {
e3.printStackTrace();
}
//对图像进行中值滤波，Alpha值保持不变
ColorModel cm=ColorModel.getRGBdefault();
//++i;
synchronized(this)
{
if(i<ih)
{
for(int j=1;j<iw-1;j++)
{
int red,green,blue;
int alpha=cm.getAlpha(pixels[i*iw+j]);
//int red2=cm.getRed(pixels[(i-1)*iw+j]);
int red4=cm.getRed(pixels[i*iw+j-1]);
int red5=cm.getRed(pixels[i*iw+j]);
int red6=cm.getRed(pixels[i*iw+j+1]);
//int red8=cm.getRed(pixels[(i+1)*iw+j]);
//水平方向进行中值滤波
if(red4>=red5){
if(red5>=red6) {red=red5;}
else{
if(red4>=red6) {red=red6;}
else{red=red4;}
}}
else{
if(red4>red6) {red=red4;}
else{
if(red5>red6) {red=red6;}
else{red=red5;}
}}
//int green2=cm.getGreen(pixels[(i-1)*iw+j]);
int green4=cm.getGreen(pixels[i*iw+j-1]);
int green5=cm.getGreen(pixels[i*iw+j]);
int green6=cm.getGreen(pixels[i*iw+j+1]);
//int green8=cm.getGreen(pixels[(i+1)*iw+j]);
//水平方向进行中值滤波
if(green4>=green5){
if(green5>=green6) {green=green5;}
else{
if(green4>=green6) {green=green6;}
else{green=green4;}
}}
else{
if(green4>green6) {green=green4;}
else{
if(green5>green6) {green=green6;}
else{green=green5;}
}}
//int blue2=cm.getBlue(pixels[(i-1)*iw+j]);
int blue4=cm.getBlue(pixels[i*iw+j-1]);
int blue5=cm.getBlue(pixels[i*iw+j]);
int blue6=cm.getBlue(pixels[i*iw+j+1]);
// int blue8=cm.getBlue(pixels[(i+1)*iw+j]);
//水平方向进行中值滤波
if(blue4>=blue5){
if(blue5>=blue6) {blue=blue5;}
else{
if(blue4>=blue6) {blue=blue6;}
else{blue=blue4;}
}}
else{
if(blue4>blue6) {blue=blue4;}
else{
if(blue5>blue6) {blue=blue6;}
else{blue=blue5;}
}}
pixels[i*iw+j]=alpha<<24|red<<16|green<<8|blue;
//System.out.println(pixels[i*iw+j]);
}
}
}
}
public int[] GetPixels()
{
return pixels;
}
}
