#include <opencv2/opencv.hpp>
#include <cstdio>
#include <cstdlib>
#include <Windows.h>
using namespace std;
int main()
{
// 加載Haar特徵檢測分類器
// haarcascade_frontalface_alt.xml系OpenCV自帶的分類器 下面是我機器上的文件路徑
const char *pstrCascadeFileName = "D:\\opencv\\sources\\data\\haarcascades_cuda\\haarcascade_frontalface_alt.xml";
//const char *pstrCascadeFileName = "haarcascade_frontalface_alt.xml";
CvHaarClassifierCascade *pHaarCascade = NULL;
pHaarCascade = (CvHaarClassifierCascade*)cvLoad(pstrCascadeFileName);
// 載入圖像
const char *pstrImageName = "timg.jpg";
IplImage *pSrcImage = cvLoadImage(pstrImageName, CV_LOAD_IMAGE_UNCHANGED);
IplImage *pGrayImage = cvCreateImage(cvGetSize(pSrcImage), IPL_DEPTH_8U, 1);
cvCvtColor(pSrcImage, pGrayImage, CV_BGR2GRAY);
// 人臉識別與標記
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);
// 識別
DWORD dwTimeBegin, dwTimeEnd;
dwTimeBegin = GetTickCount();
CvSeq *pcvSeqFaces = cvHaarDetectObjects(pGrayImage, pHaarCascade, pcvMStorage);
dwTimeEnd = GetTickCount();
printf("人臉個數: %d 識別用時: %d ms\n", pcvSeqFaces->total, dwTimeEnd - dwTimeBegin);
// 標記
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 = "人臉識別 (http://blog.csdn.net/MoreWindows)";
cvNamedWindow(pstrWindowsTitle, CV_WINDOW_AUTOSIZE);
cvShowImage(pstrWindowsTitle, pSrcImage);
cvWaitKey(0);
cvDestroyWindow(pstrWindowsTitle);
cvReleaseImage(&pSrcImage);
cvReleaseImage(&pGrayImage);
return 0;
}
文章主要爲自己記錄,不對的地方歡迎交流。
關鍵點:
1、opencv3.4.3官方下載爲X64位的,我的vs2017 community 是X86的,所以需要用cmake 對opencv的\sources\文件夾重新編譯(注意勾選world選項),有這個一個opencv_world343d.dll、opencv_world343d.lib庫文件即可,頭文件沿用原來include。
2、 cvLoad加載分類器需要調用 \opencv\sources\data\haarcascades_cuda這個文件夾下的XML文件就不會報錯了。參考文章https://blog.csdn.net/H1250161943/article/details/50301831?locationNum=2
3.遇到detectMultiScale報錯,很有可能是haarcascade_frontalface_alt2.xml文件加載失敗,參考文章https://blog.csdn.net/cqltbe131421/article/details/73608975
4、親測好用,但是不太準,還要訓練。