USB Webcam

package opencv;

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfByte;
import org.opencv.highgui.Highgui;
import org.opencv.highgui.VideoCapture;

public class OpenCVTest {
    static final int READ_IMAGE_CNT = 1000;
    static final int ENCODE_IMAGE_CNT = 1000;
    VideoCapture vid;
    Mat camImage = new Mat();

  void init()
  {
      vid = new VideoCapture(0);
      //vid.set(Highgui.CV_CAP_PROP_FRAME_WIDTH, 160);
      //vid.set(Highgui.CV_CAP_PROP_FRAME_HEIGHT, 120);
      //vid.open(0);
      vid.read(camImage);
      System.out.println("Image size is: " + camImage.cols() + "x" + camImage.rows());
  }

  void captureTest()
  {
      System.out.println("capture test read " + READ_IMAGE_CNT + " images");
      long start = System.currentTimeMillis();
      for(int i = 0; i < READ_IMAGE_CNT; i++)
          vid.read(camImage);
      double time = (double)(System.currentTimeMillis() - start)/1000;
      System.out.println("Time is " + time + " = " + (READ_IMAGE_CNT/time) + "fps");
  }

  void encodeTest()
  {
      System.out.println("Encoding image as jpeg " + ENCODE_IMAGE_CNT + " images");
      MatOfByte buf = new MatOfByte();
      long start = System.currentTimeMillis();
      for(int i = 0; i < READ_IMAGE_CNT; i++)
          Highgui.imencode(".jpg", camImage, buf);
      double time = (double)(System.currentTimeMillis() - start)/1000;
      System.out.println("Time is " + time + " = " + (READ_IMAGE_CNT/time) + "fps");
  }


  public static void main(String[] args) {
    // Load the native library.
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    OpenCVTest test = new OpenCVTest();
    test.init();
    test.captureTest();
    test.encodeTest();
  }
}