项目运行涉及到opencv库，以及haarcascade_frontalface_default.xml和haarcascade_eye_tree_eyeglasses.xml。qt配置opencv可见先前文章，另外这两份OpenCV 中用于眼睛检测的级联分类器xml文件，是我在网上下载的。


把要使用到的文件都放到当前工程目录下：






相关代码：

#include <opencv2/imgcodecs.hpp>
#include <opencv2/core.hpp>
#include <opencv2/opencv.hpp>
#include <opencv2/core/hal/interface.h>
#include <opencv2/features2d/hal/interface.h>
#include <opencv2/imgproc/hal/interface.h>
#include <opencv2/objdetect.hpp>

 	QString imgPath = "D:\\Qt\\File\\open_test\\zyh.jpg";
    cv::Mat imgMat = cv::imread(imgPath.toStdString());

    //脸部识别
    cv::CascadeClassifier faceCascade;
    faceCascade.load("D:\\Qt\\File\\open_test\\opencv\\haarcascades\\haarcascade_frontalface_default.xml");
    if(faceCascade.empty())
        std::cout<< "face XML file not loaded"<<std::endl;

    std::vector<cv::Rect> faces;
    faceCascade.detectMultiScale(imgMat, faces, 1.1, 10);
    for(int i=0; i<faces.size(); i++){
        cv::rectangle(imgMat, faces[i].tl(), faces[i].br(), cv::Scalar(255,0,255),3);
    }


    //眼部识别
    cv::CascadeClassifier eyeCascade;
    eyeCascade.load("D:\\Qt\\File\\open_test\\opencv\\haarcascades\\haarcascade_eye_tree_eyeglasses.xml");
    if(eyeCascade.empty())
        std::cout<< "eye XML file not loaded"<<std::endl;

    std::vector<cv::Rect> eyes;
    eyeCascade.detectMultiScale(imgMat, eyes, 1.1, 10);
    for(int i=0; i<eyes.size(); i++){
        cv::rectangle(imgMat, eyes[i].tl(), eyes[i].br(), cv::Scalar(255,0,0),1);
    }


    cv::imshow("Image", imgMat);