opencv3_java 图像检测人脸图像CascadeClassifier DetectObjects lbpcascade_frontalface

package opencv_java_demo;

import org.opencv.core.*;
import org.opencv.imgcodecs.*;
import org.opencv.objdetect.*;
import org.opencv.imgproc.*;

public class DetectObjects {
private static Mat dobj(Mat src){
Mat dst=src.clone();

CascadeClassifier objDetector=new CascadeClassifier("./data/lbpcascades/lbpcascade_frontalface.xml");

MatOfRect objDetections=new MatOfRect();

objDetector.detectMultiScale(dst, objDetections);

if(objDetections.toArray().length<=0){
return src;
}
for(Rect rect:objDetections.toArray()){
Imgproc.rectangle(dst, new Point(rect.x,rect.y), new Point(rect.x+rect.width,rect.y+rect.width), new Scalar(0,0,255),2);
}
return dst;
}

public static void main(String[] args) {
try{
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

Mat src=Imgcodecs.imread("./images/lenna.jpg");
if(src.empty()){
throw new Exception("no file");
}
Mat dst=dobj(src);
Imgcodecs.imwrite("./images/dobj.jpg", dst);
}catch(Exception e){
System.out.println("例外："+e);
}
}
}