JavaCVでカメラから動画像を取得する

VideoCaptureServiceSample.java

import javafx.concurrent.Service;
import javafx.concurrent.Task;
import org.bytedeco.javacpp.opencv_core.*;
import org.bytedeco.javacpp.opencv_videoio.*;

import static org.bytedeco.javacpp.opencv_videoio.CV_CAP_PROP_FRAME_HEIGHT;
import static org.bytedeco.javacpp.opencv_videoio.CV_CAP_PROP_FRAME_WIDTH;

public class VideoCaptureServiceSample extends Service<Mat> {
    private final VideoCapture videoCapture;

    public VideoCaptureServiceSample(int cameraIndex, int width, int height) {
        this.videoCapture = new VideoCapture(cameraIndex);
        videoCapture.set(CV_CAP_PROP_FRAME_WIDTH, width);
        videoCapture.set(CV_CAP_PROP_FRAME_HEIGHT, height);
    }

    public void releaseVideoCapture() {
        this.videoCapture.release();
    }

    @Override
    protected Task<Mat> createTask() {
        return new Task<Mat>() {
            @Override
            protected Mat call() throws Exception {
                return capture();
            }
        };
    }

    private Mat capture() {
        Mat capturedImage = new Mat();
        this.videoCapture.read(capturedImage);
        return capturedImage;
    }
}