java人脸识别

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.opencv.objdetect.CascadeClassifier;

public class FaceDetection {
    static { System.loadLibrary(Core.NATIVE_LIBRARY_NAME); }

    public static void main(String[] args) {
        CascadeClassifier faceDetector = new CascadeClassifier("path/to/haarcascade_frontalface_default.xml");
        Mat image = Imgcodecs.imread("path/to/image.jpg");

        MatOfRect faceDetections = new MatOfRect();
        faceDetector.detectMultiScale(image, faceDetections);

        for (Rect rect : faceDetections.toArray()) {
            Imgproc.rectangle(image, rect.tl(), rect.br(), new Scalar(0, 255, 0));
        }

        Imgcodecs.imwrite("output.jpg", image);
    }
}