Explication du code

package gui;
 
 
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.imgcodecs; // imread, imwrite, etc
import org.opencv.imgproc.Imgproc;

import org.opencv.objdetect.CascadeClassifier;
 
public class FaceDetection {
 
    public static void main(String[] args) {
 
       System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        System.out.println("\nRunning FaceDetector");
 
        CascadeClassifier faceDetector = new CascadeClassifier(FaceDetection.class.getResource("haarcascade_frontalface_alt.xml").getPath());
        Mat image = imgcodecs.imencode(FaceDetection.class.getResource("C:\\Users\\TOSHIBA\\Desktop1.jpg").getPath());
 
        MatOfRect faceDetections = new MatOfRect();
        faceDetector.detectMultiScale(image, faceDetections);
 
        System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));
 
        for (Rect rect : faceDetections.toArray()) {
            Imgproc.rectangle(image, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height),
                    new Scalar(0, 255, 0));
        }
 
        String filename = "ouput.png";
        System.out.println(String.format("Writing %s", filename));
        imgcodecs.imwrite(filename, image);
    }
}