opencv 利用Haar 人脸识别
#include <opencv2/opencv.hpp> #include <cstdio> #include <cstdlib> #include <iostream> #include <Windows.h> using namespace std; int main() { // 加载Haar特征检测分类器 // haarcascade_frontalface_alt.xml系OpenCV自带的分类器 下面是我机器上的文件路径 const char *pstrCascadeFileName = "D:\\opencv\\opencv2.4.10\\opencv\\sources\\data\\haarcascades\\haarcascade_frontalface_alt.xml"; CvHaarClassifierCascade *pHaarCascade = NULL; pHaarCascade = (CvHaarClassifierCascade*)cvLoad(pstrCascadeFileName); // 载入图像 const char *pstrImageName = "D:\\721.jpg"; IplImage *pSrcImage = cvLoadImage(pstrImageName, CV_LOAD_IMAGE_UNCHANGED); IplImage *pGrayImage = cvCreateImage(cvGetSize(pSrcImage), IPL_DEPTH_8U, 1); cvCvtColor(pSrcImage, pGrayImage, CV_BGR2GRAY); // 人脸识别与标记 if (pHaarCascade != NULL) { CvScalar FaceCirclecolors[] = { {{0, 0, 255}}, {{0, 128, 255}}, {{0, 255, 255}}, {{0, 255, 0}}, {{255, 128, 0}}, {{255, 255, 0}}, {{255, 0, 0}}, {{255, 0, 255}} }; CvMemStorage *pcvMStorage = cvCreateMemStorage(0); cvClearMemStorage(pcvMStorage); DWORD dwTimeBegin, dwTimeEnd; dwTimeBegin = GetTickCount(); CvSeq *pcvSeqFaces = cvHaarDetectObjects(pGrayImage, pHaarCascade, pcvMStorage); dwTimeEnd = GetTickCount(); printf("人脸个数: %d 识别用时: %d ms\n", pcvSeqFaces->total, dwTimeEnd - dwTimeBegin); for(int i = 0; i <pcvSeqFaces->total; i++) { CvRect* r = (CvRect*)cvGetSeqElem(pcvSeqFaces, i); CvPoint center; int radius; center.x = cvRound((r->x + r->width * 0.5)); center.y = cvRound((r->y + r->height * 0.5)); radius = cvRound((r->width + r->height) * 0.25); cvCircle(pSrcImage, center, radius, FaceCirclecolors[i % 8], 2); } cvReleaseMemStorage(&pcvMStorage); } const char *pstrWindowsTitle = "人脸识别"; cvNamedWindow(pstrWindowsTitle, CV_WINDOW_AUTOSIZE); cvShowImage(pstrWindowsTitle, pSrcImage); cvWaitKey(0); cvDestroyWindow(pstrWindowsTitle); cvReleaseImage(&pSrcImage); cvReleaseImage(&pGrayImage); return 0; }