import java.io.File;
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.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.opencv.objdetect.CascadeClassifier;
/**
*
* OpenCV3.4 FaceDetect
*
*/
public class FaceDetect
{
/**
* 识别指定图片上的所有人脸
* @param inImg 输入原图
* @param outImg 输出图片,在原图的基础上添加"识别框"
*/
public static void detect(String inImg,String outImg){
//copy opencv_java340.dll under the jdk1.8/bin jdk1.8/jre/bin dir.
//将opencv_java340.dll拷贝到jdk的/jre/bin目录下面
// TODO Auto-generated method stub
File f = new File(inImg);
//原图片不存在直接退出
if(!f.exists()){
System.out.println("\n Image File Not Found!");
return;
}
//获取原文件路径,让输出文件与原文件保存在同一路径
String filePath = f.getAbsolutePath().substring(0, f.getAbsolutePath().indexOf(File.separator)+1);
//加载OPENCV3.4本地库,必须先加载
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
System.out.println("\nRunning FaceDetector");
CascadeClassifier faceDetector = new CascadeClassifier();
/**
* 分类器,路径根据实际情况调整
* haarcascade_frontalface_default 默认
* haarcascade_frontalface_alt 识别性能要好些
*/
faceDetector.load(
"D:\\insput_jkpt\\openCV\\opencv\\build\\etc\\haarcascades\\haarcascade_frontalface_alt.xml");
//读取图像
Mat image = Imgcodecs.imread(inImg);
//用于保存监测到的人脸
MatOfRect faceDetections = new MatOfRect();
//开始监测
faceDetector.detectMultiScale(image, faceDetections);
System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));
int i=0;
for (Rect rect : faceDetections.toArray())
{
//循环所有监测到的人脸
Point x = new Point(rect.x, rect.y);
Point y = new Point(rect.x + rect.width, rect.y + rect.height);
//在image图片上画框,x,y可确定框的位置和大小,new Scalar(0, 255, 0)是框的颜色,自行调整
Imgproc.rectangle(image, x,y, new Scalar(0, 255, 0));
//保存监测的人脸小图片
Rect r = new Rect(x, y);
System.out.println(r.height+":"+r.width);
Mat areaM = new Mat(image, r);
//保存监测的人脸小图片到tmp+序号的jpg文件
String tmpFilePath = filePath+"tmp"+(i++)+".jpg";
Imgcodecs.imwrite(tmpFilePath, areaM);
}
//保存画了方框的图片
String filename = outImg;
Imgcodecs.imwrite(filename, image);
//销毁
image.release();
}
public static void main(String[] args)
{
detect("d:\\a1.jpg","d:\\ouput.jpg");
}
}