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内容说明
直接参考了OpenCV 3.0的示例程序，程序为opencv\sources\samples\cpp\tutorial_code\objectDetection目录下的objectDetection.cpp文件。本文使用了C++类进行封装
实验结果
原始图像与识别结果：
程序代码
1、 OpenCVTest.cpp
#include "stdafx.h"
#include "FaceRecognition.hpp"int _tmain(int argc, _TCHAR* argv[])
{char* path = "C:\\Users\\dhj555\\Desktop\\22.jpg";cv::Mat img = cv::imread(path);FaceRecognition* recog = new FaceRecognition();recog->setImg(img);recog->recognition();cvWaitKey();return 0;
}2、FaceRecognition.hpp
#include "stdafx.h"
#include <opencv2/opencv.hpp>class FaceRecognition
{
private:cv::Mat m_mImg;char* face_cascade_name = "D:\\OpenCV\\opencv\\sources\\data\\haarcascades\\haarcascade_frontalface_alt.xml";char* eyes_cascade_name = "D:\\OpenCV\\opencv\\sources\\data\\haarcascades\\haarcascade_eye.xml";cv::CascadeClassifier face_cascade;cv::CascadeClassifier eyes_cascade;public:FaceRecognition();~FaceRecognition();void recognition();void setImg(cv::Mat mat);
};FaceRecognition::FaceRecognition(){}FaceRecognition::~FaceRecognition()
{delete face_cascade_name;delete eyes_cascade_name;
}void FaceRecognition::setImg(cv::Mat mat)
{this->m_mImg = mat;
}void FaceRecognition::recognition()
{//-- 1. Load the cascadesif (!face_cascade.load(face_cascade_name)){ printf("--(!)Error loading face cascade\n"); return ; };if (!eyes_cascade.load(eyes_cascade_name)){ printf("--(!)Error loading eyes cascade\n"); return ; };std::vector<cv::Rect> faces;cv::Mat img_gray;cvtColor(m_mImg, img_gray, cv::COLOR_BGR2GRAY);cv::equalizeHist(img_gray, img_gray);//-- 2. Detect facesface_cascade.detectMultiScale(img_gray, faces, 1.1, 2, 0 | cv::CASCADE_SCALE_IMAGE, cv::Size(30, 30));for (int i = 0; i < faces.size(); i++){cv::Point center(faces[i].x + faces[i].width / 2, faces[i].y + faces[i].height / 2);ellipse(m_mImg, center, cv::Size(faces[i].width / 2, faces[i].height / 2), 0, 0, 360, cv::Scalar(255, 0, 255), 4, 8, 0);cv::Mat faceROI = img_gray(faces[i]);std::vector<cv::Rect> eyes;//-- In each face, detect eyeseyes_cascade.detectMultiScale(faceROI, eyes, 1.1, 2, 0 | cv::CASCADE_SCALE_IMAGE, cv::Size(30, 30));for (size_t j = 0; j < eyes.size(); j++){cv::Point eye_center(faces[i].x + eyes[j].x + eyes[j].width / 2, faces[i].y + eyes[j].y + eyes[j].height / 2);int radius = cvRound((eyes[j].width + eyes[j].height)*0.25);circle(m_mImg, eye_center, radius, cv::Scalar(255, 0, 0), 4, 8, 0);}}//-- 3. Show resultcv::imshow("Res", m_mImg);
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