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I'm making the object detection tutorial in Java. The face detection is working but the eye detection crashes the program. Windows gives me a pop-up that says:

Display driver stopped responding and has succesfully recovered.

This is my code:

public Mat detectFace(Mat frame){
    CascadeClassifier face_cascade = new CascadeClassifier(face_cascade_name);
    CascadeClassifier eyes_cascade = new CascadeClassifier(eyes_cascade_name);

    Mat greyScale = new Mat();
    Imgproc.cvtColor(frame, greyScale, Imgproc.COLOR_BGR2GRAY);
    Imgproc.equalizeHist(greyScale, greyScale);

    MatOfRect faces = new MatOfRect();
    face_cascade.detectMultiScale(greyScale, faces);
    List<Rect> facesList = faces.toList();

    for(Rect face : facesList){
        Point center = new Point ( face.x + face.width*0.5, face.y + face.height*0.5 );
        Imgproc.ellipse( frame, center, new Size( face.width*0.5, face.height*0.5), 0.0, 0.0, 360.0, new Scalar( 255, 0, 255 ), 4, 8, 0 );

        Mat faceMat = new Mat(greyScale, face);

        MatOfRect eyes = new MatOfRect();
        eyes_cascade.detectMultiScale(faceMat, eyes);
        List<Rect> eyesList = eyes.toList();

        System.out.println(eyesList.size());

        for(Rect eye : eyesList){
            Point eyeCenter = new Point( face.x + eye.x + eye.width*0.5, face.y + eye.y + eye.height*0.5 );
               int radius = (int) ((eye.width + eye.height)*0.25 );
               Imgproc.circle( frame, center, radius, new Scalar( 255, 0, 0 ), 4, 8, 0 );
        }
    }

    return frame;
}

It crashes at eyes_cascade.detectMultiScale(faceMat, eyes) but face_cascade.detectMultiScale(greyScale, faces) works fine

I'm making the object detection tutorial in Java. The face detection is working but the eye detection crashes the program. Windows gives me a pop-up that says:

Display driver stopped responding and has succesfully recovered.

This is my code:

public Mat detectFace(Mat frame){
    CascadeClassifier face_cascade = new CascadeClassifier(face_cascade_name);
    CascadeClassifier eyes_cascade = new CascadeClassifier(eyes_cascade_name);

    Mat greyScale = new Mat();
    Imgproc.cvtColor(frame, greyScale, Imgproc.COLOR_BGR2GRAY);
    Imgproc.equalizeHist(greyScale, greyScale);

    MatOfRect faces = new MatOfRect();
    face_cascade.detectMultiScale(greyScale, faces);
    List<Rect> facesList = faces.toList();

    for(Rect face : facesList){
        Point center = new Point ( face.x + face.width*0.5, face.y + face.height*0.5 );
        Imgproc.ellipse( frame, center, new Size( face.width*0.5, face.height*0.5), 0.0, 0.0, 360.0, new Scalar( 255, 0, 255 ), 4, 8, 0 );

        Mat faceMat = new Mat(greyScale, face);

        MatOfRect eyes = new MatOfRect();
        eyes_cascade.detectMultiScale(faceMat, eyes);
        List<Rect> eyesList = eyes.toList();

        System.out.println(eyesList.size());

        for(Rect eye : eyesList){
            Point eyeCenter = new Point( face.x + eye.x + eye.width*0.5, face.y + eye.y + eye.height*0.5 );
               int radius = (int) ((eye.width + eye.height)*0.25 );
               Imgproc.circle( frame, center, radius, new Scalar( 255, 0, 0 ), 4, 8, 0 );
        }
    }

    return frame;
}

It crashes at eyes_cascade.detectMultiScale(faceMat, eyes) but face_cascade.detectMultiScale(greyScale, faces) works finefine.