Example usage for org.opencv.videoio VideoCapture open

Introduction

In this page you can find the example usage for org.opencv.videoio VideoCapture open.

Prototype

public boolean open(int index) 

Source Link

Usage

From source file:OCV_CntrlUvcCamera.java

License:Open Source License

@Override
public void run(ImageProcessor arg0) {
    boolean bret = true;

    // ----- stop dialog during continuous grabbing -----
    diag_free = new JDialog(diag_free, title, false);
    JButton but_stop_cont = new JButton("Stop");

    but_stop_cont.addMouseListener(new MouseAdapter() {
        @Override//from  www . j a  va  2 s .c  om
        public void mouseClicked(MouseEvent e) {
            flag_fin_loop = true;
            diag_free.dispose();
        }
    });

    diag_free.addWindowListener(new WindowAdapter() {
        @Override
        public void windowClosing(WindowEvent e) {
            flag_fin_loop = true;
        }
    });

    diag_free.add(but_stop_cont);
    diag_free.setSize(100, 75);
    // ----- end of stop dialog -----

    // initialize camera
    VideoCapture src_cap = new VideoCapture();
    Mat src_mat = new Mat();
    bret = src_cap.open(device);

    if (!bret) {
        IJ.error("Camera initialization is failed.");
        diag_free.dispose();
        return;
    }

    src_cap.set(CV_CAP_PROP_FRAME_WIDTH, width);
    src_cap.set(CV_CAP_PROP_FRAME_HEIGHT, height);

    // Setting the image display window
    width = (int) src_cap.get(CV_CAP_PROP_FRAME_WIDTH);
    height = (int) src_cap.get(CV_CAP_PROP_FRAME_HEIGHT);

    ImagePlus impDsp = IJ.createImage(title, width, height, 1, 24);

    int[] impdsp_intarray = (int[]) impDsp.getChannelProcessor().getPixels();

    impDsp.show();
    impDsp.setRoi(0, 0, impDsp.getWidth(), impDsp.getHeight());

    // show stop dialog
    diag_free.setVisible(true);

    // run
    for (;;) {
        if (flag_fin_loop) {
            break;
        }

        // grab
        impDsp.startTiming();
        bret = src_cap.read(src_mat);
        IJ.showTime(impDsp, impDsp.getStartTime(), title + " : ");

        if (!bret) {
            IJ.error("Error occurred in grabbing.");
            diag_free.dispose();
            break;
        }

        if (src_mat.empty()) {
            IJ.error("Mat is empty.");
            diag_free.dispose();
            break;
        }

        // display
        if (src_mat.type() == CvType.CV_8UC3) {
            OCV__LoadLibrary.mat2intarray(src_mat, impdsp_intarray, width, height);
        } else {
            IJ.error("Color camera is supported only.");
            diag_free.dispose();
            break;
        }

        impDsp.draw();

        // wait
        wait(wait_time);
    }

    diag_free.dispose();

    if (src_cap.isOpened()) {
        src_cap.release();
    }
}

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From source file:formularios.FrmCamera.java

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
    // TODO add your handling code here:
    System.out.println("Hello, OpenCV");
    // Load the native library.
    System.out.println(System.getProperty("java.library.path"));
    System.loadLibrary("opencv-300");

    VideoCapture camera = new VideoCapture(0);
    camera.open(0); //Useless
    if (!camera.isOpened()) {
        System.out.println("Camera Error");
    } else {// w ww . j  a  v a 2s  .c om
        System.out.println("Camera OK?");
    }

    Mat frame = new Mat();

    //camera.grab();
    //System.out.println("Frame Grabbed");
    //camera.retrieve(frame);
    //System.out.println("Frame Decoded");

    camera.read(frame);
    System.out.println("Frame Obtained");

    /* No difference
    camera.release();
    */

    System.out.println("Captured Frame Width " + frame.width());

    Imgcodecs.imwrite("camera.jpg", frame);
    System.out.println("OK");

}

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