OpenCV摄像头人脸识别

时间：2023-11-20 12:01:08

注：

从外设摄像装置中获取图像帧，把每帧的图片与人脸特征进行匹配，用方框框住识别出来的人脸

需要用到的函数：

CvHaarClassifierCascade* cvLoadHaarClassifierCascade( const char* directory, CvSize orig_window_size );

第一个参数：训练好的级联分类器的路径

第二个参数：级联分类器训练中采用的检测目标的尺寸

#include "stdafx.h"

#include "iostream"

using namespace std;

#include "opencv2/opencv.hpp"

#include "cv.h"

#include "highgui.h"

#include "cxcore.h"

#include "Windows.h"

void main()

{

    IplImage *pFrame = NULL;

    IplImage *pGrayImg = NULL;

    //加载Haar特征检测分类器

    const char *pCascadeFileName = "E:/C_VC_code/opencv/haarcascade_frontalface_alt2.xml";

    //CvHaarClassifierCascade *pHaarCascade  = (CvHaarClassifierCascade*)cvLoad(pCascadeFileName);

    CvHaarClassifierCascade *pHaarCascade  = cvLoadHaarClassifierCascade(pCascadeFileName,cvSize(,));  

    CvCapture *pCapture = cvCreateCameraCapture(); //获取摄像头

    cout<< "加载成功..." <<endl;

    int nFrmNum = ;

    if(!pCapture)

    {

        cout<<"加载失败..."<<endl;

        return ;

    }

    //create window

    cvNamedWindow("Video",);

    CvMemStorage *pcvMStorage;

    CvSeq *pCvSeq;

    while(pFrame = cvQueryFrame(pCapture))    //逐帧读取

    {

        pGrayImg = cvCreateImage(cvGetSize(pFrame), IPL_DEPTH_8U, );

        cvCvtColor(pFrame, pGrayImg, CV_BGR2GRAY);  

        //---------------人脸识别-------------------------

        if (pHaarCascade != NULL)

        {

            pcvMStorage = cvCreateMemStorage();

            cvClearMemStorage(pcvMStorage);

            // 识别

            pCvSeq = cvHaarDetectObjects(pGrayImg, pHaarCascade, pcvMStorage);   

            // 标记

            for(int i = ; i <pCvSeq->total; i++)

            {

                CvRect* r = (CvRect*)cvGetSeqElem(pCvSeq, i);

                CvPoint pt[];

                pt[] = cvPoint(r->x,r->y);

                pt[] = cvPoint(r->x+r->width,r->y);

                pt[] = cvPoint(r->x+r->width,r->y+r->height);

                pt[] = cvPoint(r->x,r->y+r->height);

                CvPoint* ppt=pt;

                int count=;

                cvPolyLine( pFrame, &ppt,&count,,,CV_RGB(,,),);//画矩形

            }  

            cvReleaseMemStorage(&pcvMStorage);

        }  

        cvShowImage("Video",pFrame);

        //---------------人脸识别-------------------------

        char c = cvWaitKey();    //按esc退出

        if(c==)

        {

            cvDestroyWindow("Video");

            cvReleaseImage(&pFrame);

            cvReleaseImage(&pGrayImg);

            return;

        }

    }

}

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