What is the best method to capture images from a live video device for use by a Java-based application?

Question

I am looking into an image processing problem for semi-real time detection of certain scenarios. My goal is to have the live video arrive as Motion JPEG frames in my Java c

Answer 1

Below is shown a very simple implementation using Marvin Framework. Using Marvin you can add real time video processing easily.

import javax.swing.JFrame;
import marvin.gui.MarvinImagePanel;
import marvin.image.MarvinImage;
import marvin.video.MarvinJavaCVAdapter;
import marvin.video.MarvinVideoInterface;

public class SimpleVideoTest extends JFrame implements Runnable{

    private MarvinVideoInterface    videoAdapter;
    private MarvinImage             image;
    private MarvinImagePanel        videoPanel;

    public SimpleVideoTest(){
        super("Simple Video Test");

        // Create the VideoAdapter and connect to the camera
        videoAdapter = new MarvinJavaCVAdapter();
        videoAdapter.connect(0);

        // Create VideoPanel
        videoPanel = new MarvinImagePanel();
        add(videoPanel);

        // Start the thread for requesting the video frames 
        new Thread(this).start();

        setSize(800,600);
        setVisible(true);
    }

    public static void main(String[] args) {
        SimpleVideoTest t = new SimpleVideoTest();
        t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    @Override
    public void run() {
        while(true){
            // Request a video frame and set into the VideoPanel
            image = videoAdapter.getFrame();
            videoPanel.setImage(image);
        }
    }
}

Another example applying multiple algorithms for real time video processing.