程序说明.txt

jmf拍照程序。开发环境是eclipse

1.安装 JMF2.1windows 板，在classpath中包含：jmf.jar和sound.jar；在path中需要包含jmf
动态库的路径。
2.在调式jmf程序时遇到的问题：EXception in thread "VFM Request Thread" no jmvfw in 
java library path; 解决方法：复制jmvfw.dll和jmvcm.dll从windows/system32到jre的bin目录；
3.装上摄像头后别忘了注册；jmfregistry.exe /capture Devices /detect capture devices

4.实时采集数据并显示:   
	1).多媒体数据。核心代码：Player player=null;
				Component vc=null;
				Component cc=null;
				URL  theURL;
	     theURL=new URL(getClass().getResource("."),mediaAddress);
	     mediaAddress=file:///d:/sport.mov;
	     player=Manager.createPlayer(theURL);
       实现：ControllerListener接口：vc=player.getVisualComponent();
			      cc=player.getControlComponent();
			      add(BorderLayout.CENTER,vc);
			      add(BorderLayout.SOUTH,cc);
	2).从摄像头实时采集数据并显示。核心代码：主要是MediaLocator 对象变了；
           变成摄像头的驱动；
		CaptureDeviceInfo di=CaptureDeviceManger.getDevice("vfw:Microsoft WDM Image
 					Capture (Win32):0");
		MediaLocator ml=di.getLocator();
		Player thePlayer=Manager.createPlayer(ml);
5.拍照程序代码;
    	FrameGrabbingControl fgc =(FrameGrabbingControl)thePlayer.getControl("
				javax.media.control.FrameGrabbingControl");
	Buffer buf = fgc.grabFrame(); // 获取当前祯并存入Buffer类
	BufferToImage btoi = new BufferToImage((VideoFormat) buf.getFormat());
	Image		img = btoi.createImage(buf); // 得到了图像；

6.绘图程序框架：
		public class ImageCapture extends JFrame {
			 int xpoint = 40, ypoint = 40;
			 private Image image;

			 public ImageCapture(Image img) {
			 	super("ImageCapture"); 
			 	this.image=img;
		 
		 		setSize(400, 400);
		 		setVisible(true);
		
			}
	 
	
			public void paint(Graphics g) {
				System.out.println(g);
		 		g.drawImage(image,xpoint,ypoint,this);
	  		}
		}
7.保存图片的代码：
			
			String	fileAddr="d://image.jpg";
			
			BufferedImage bi = (BufferedImage) createImage(width,hight);
			Graphics2D g2 = bi.createGraphics();
			g2.drawImage(image, null, null);
			FileOutputStream out = null;
			try
			{
				File f = new File(fileAddr);
				out = new FileOutputStream(f);
			}
			catch (java.io.FileNotFoundException io)
			{
				System.out.println("File Not Found");
			}

			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
			JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
			param.setQuality(1f, false);//不压缩图像
			encoder.setJPEGEncodeParam(param);
			try
			{
				encoder.encode(bi);
				out.close();
			}
			catch (java.io.IOException io)
			{
				System.out.println("IOException");
			}
			
		}