EigenFace implementation: in Java using OpenCV3

Question

I want to recognize faces in real time through a webcam.I have worked till detecting a face through webcam,but I am having trouble in implementing eigen face algorithm in Java (Netbeans).

I have achieved face detection using following code :-

private DaemonThread myThread = null;
int count = 0;
VideoCapture webSource = null;

Mat frame = new Mat();
MatOfByte mem = new MatOfByte();
CascadeClassifier faceDetector = new CascadeClassifier(ScannerGUI.class.getResource("haarcascade_frontalface_alt.xml").getPath().substring(1));
MatOfRect faceDetections = new MatOfRect();


class DaemonThread implements Runnable
{
protected volatile boolean runnable = false;

@Override
public  void run()
{
    synchronized(this)
    {
        while(runnable)
        {
            if(webSource.grab())
            {
            try
                    {
                        webSource.retrieve(frame);
            //Highgui.imencode(".bmp", frame, mem);
                        Graphics g=jPanel1.getGraphics();
                        faceDetector.detectMultiScale(frame, faceDetections);

                        for (Rect rect : faceDetections.toArray()) 
                       {  Imgproc.rectangle(frame, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height),new Scalar(0, 255, 0),2);
                        }

                        Imgcodecs.imencode(".bmp", frame, mem);
            Image im = ImageIO.read(new ByteArrayInputStream(mem.toArray()));
            BufferedImage buff = (BufferedImage) im;
            if (g.drawImage(buff, 0, 0, getWidth(), getHeight() -150 , 0, 0, buff.getWidth(), buff.getHeight(), null))

            if(runnable == false)
                        {
                System.out.println("Going to wait()");
                this.wait();
            }
         }
         catch(Exception ex)
                     {
            System.out.println("Error");
                     }
            }
        }
    }
 }
}

Now I want to first first save the detected face in eigen faces and then recognize this face.

Can someone please help me through this I have thoroughly searched online for the Eigen face implementation in Java but couldn't able to find anything useful.

Please help me through this as I am new in OpenCV and this My project for College.

OpenCV already provide eigenface implementation. I don't know if the the java wrapper supports it, but you can always call native C++ code. — Miki

clownbaby clownbaby · Accepted Answer · 2016-10-19T18:53:58

To build the OpenCV from source with contrib modules (which contain the org.opencv.face package for Java), see this question and answer.

After building the JAR with contrib modules, you can instantiate an EigenFaceRecognizer like this:

FaceRecognizer model = org.opencv.face.Face.createEigenFaceRecognizer();

EigenFace implementation: in Java using OpenCV3

1 Answers