JavaCV Canvas 保持空白

Question

我想不断捕捉网络摄像头并让它在 Canvas 上查看。图像的保存很好。它每秒拍摄一张照片。但是 canvas.showImage() 不起作用。我的屏幕仍然空白。控制台在每一帧都显示“清理相机”。

头等舱:

public class StartUp {
public static void main(String[] args) {
    CanvasFrame canvas = new CanvasFrame("Cam");
    canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
    CaptureImage captureimage = new CaptureImage();
    while(true){
        try {
            IplImage img = captureimage.captureFrame();
            canvas.showImage(img);
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}
}

第二类:

public class CaptureImage {

public IplImage captureFrame() {
    final OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);
    try {
        grabber.start();
        IplImage img = grabber.grab();
        if (img != null) {
            cvSaveImage("Image.jpg",img);     
            return img;
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}
}

Answer 1

尝试使用此代码捕获网络摄像头。在运行此代码之前加载库。 (JavaCV jar 文件等)

import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.FrameGrabber.Exception;
import com.googlecode.javacv.OpenCVFrameGrabber;
import static com.googlecode.javacv.cpp.opencv_core.*;

public class capture{

CanvasFrame frame,fr;
IplImage image,im;
OpenCVFrameGrabber grabber,gr;
public capture() throws Exception {
    frame=new CanvasFrame("Cam 1");
    grabber=new  OpenCVFrameGrabber(0);
     grabber.start();
     while (((frame.isVisible()) && (image = grabber.grab()) != null)){
         //cvFlip(image,image,1); if needed to flip.

         frame.showImage(image);


     }
     frame.setDefaultCloseOperation(1);
     frame.setDefaultCloseOperation(CanvasFrame.EXIT_ON_CLOSE);
}