Examples with FrameGrabber org.bytedeco.javacv.FrameGrabber used on opensource projects

Example 1 with FrameGrabber

use of org.bytedeco.javacv.FrameGrabber in project javacv by bytedeco.

the class ColoredObjectTrack method run.

@Override
public void run() {
    try {
        FrameGrabber grabber = FrameGrabber.createDefault(CAMERA_NUM);
        OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();
        grabber.start();
        IplImage img;
        int posX = 0;
        int posY = 0;
        while (true) {
            img = converter.convert(grabber.grab());
            if (img != null) {
                // show image on window
                // l-r = 90_degrees_steps_anti_clockwise
                cvFlip(img, img, 1);
                canvas.showImage(converter.convert(img));
                IplImage detectThrs = getThresholdImage(img);
                CvMoments moments = new CvMoments();
                cvMoments(detectThrs, moments, 1);
                double mom10 = cvGetSpatialMoment(moments, 1, 0);
                double mom01 = cvGetSpatialMoment(moments, 0, 1);
                double area = cvGetCentralMoment(moments, 0, 0);
                posX = (int) (mom10 / area);
                posY = (int) (mom01 / area);
                // only if its a valid position
                if (posX > 0 && posY > 0) {
                    paint(img, posX, posY);
                }
            }
        // Thread.sleep(INTERVAL);
        }
    } catch (Exception e) {
    }
}