使用JavaCV/OpenCV抓取并存储摄像头图像
http://blog.csdn.net/ljsspace/article/details/6702178


版权声明:本文为博主原创文章,未经博主允许不得转载。
本程序通过JFrame实时显示本机摄像头图像,并将图像存储到一个缓冲区,当用户用鼠标点击JFrame中任何区域时,显示抓取图像的简单动画,同时保存缓冲区的图像到磁盘文件中。点击JFrame关闭按钮可以退出程序。
实现:
- import java.awt.Graphics2D;
- import java.awt.event.ActionEvent;
- import java.awt.event.ActionListener;
- import java.awt.event.MouseAdapter;
- import java.awt.event.MouseEvent;
- import java.awt.image.BufferedImage;
- import java.io.File;
- import java.io.IOException;
- import javax.imageio.ImageIO;
- import javax.swing.Timer;
- import com.googlecode.javacv.CanvasFrame;
- import com.googlecode.javacv.OpenCVFrameGrabber;
- import com.googlecode.javacv.cpp.opencv_core.IplImage;
- import static com.googlecode.javacv.cpp.opencv_core.cvReleaseImage;
- /**
- *
- * Use JavaCV/OpenCV to capture camera images
- *
- * There are two functions in this demo:
- * 1) show real-time camera images
- * 2) capture camera images by mouse-clicking anywhere in the JFrame,
- * the jpg file is saved in a hard-coded path.
- *
- * @author ljs
- * 2011-08-19
- *
- */
- public class CameraCapture {
- public static String savedImageFile = "c:\\tmp\\my.jpg";
- //timer for image capture animation
- static class TimerAction implements ActionListener {
- private Graphics2D g;
- private CanvasFrame canvasFrame;
- private int width,height;
- private int delta=10;
- private int count = 0;
- private Timer timer;
- public void setTimer(Timer timer){
- this.timer = timer;
- }
- public TimerAction(CanvasFrame canvasFrame){
- this.g = (Graphics2D)canvasFrame.getCanvas().getGraphics();
- this.canvasFrame = canvasFrame;
- this.width = canvasFrame.getCanvas().getWidth();
- this.height = canvasFrame.getCanvas().getHeight();
- }
- public void actionPerformed(ActionEvent e) {
- int offset = delta*count;
- if(width-offset>=offset && height-offset >= offset) {
- g.drawRect(offset, offset, width-2*offset, height-2*offset);
- canvasFrame.repaint();
- count++;
- }else{
- //when animation is done, reset count and stop timer.
- timer.stop();
- count = 0;
- }
- }
- }
- public static void main(String[] args) throws Exception {
- //open camera source
- OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);
- grabber.start();
- //create a frame for real-time image display
- CanvasFrame canvasFrame = new CanvasFrame("Camera");
- IplImage image = grabber.grab();
- int width = image.width();
- int height = image.height();
- canvasFrame.setCanvasSize(width, height);
- //onscreen buffer for image capture
- final BufferedImage bImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
- Graphics2D bGraphics = bImage.createGraphics();
- //animation timer
- TimerAction timerAction = new TimerAction(canvasFrame);
- final Timer timer=new Timer(10, timerAction);
- timerAction.setTimer(timer);
- //click the frame to capture an image
- canvasFrame.getCanvas().addMouseListener(new MouseAdapter(){
- public void mouseClicked(MouseEvent e){
- timer.start(); //start animation
- try {
- ImageIO.write(bImage, "jpg", new File(savedImageFile));
- } catch (IOException e1) {
- e1.printStackTrace();
- }
- }
- });
- //real-time image display
- while(canvasFrame.isVisible() && (image=grabber.grab()) != null){
- if(!timer.isRunning()) { //when animation is on, pause real-time display
- canvasFrame.showImage(image);
- //draw the onscreen image simutaneously
- bGraphics.drawImage(image.getBufferedImage(),null,0,0);
- }
- }
- //release resources
- cvReleaseImage(image);
- grabber.stop();
- canvasFrame.dispose();
- }
- }
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