Opencv之摄像头人脸识别

代码如下：
#include
"stdafx.h"
#include
<opencv2\opencv.hpp>
 
using namespace cv;
 
int main()
{
    Mat img;
    Mat grayscaleFrame;
    CascadeClassifier face_cascade;
    face_cascade.load("haarcascade_frontalface_alt2.xml");//相对路径，将xml文件放在相应文件里
    VideoCapture cam(0);
    if (!cam.isOpened()) exit(0);
    while (true)
    {
        cam >> img;
   
        cvtColor(img, grayscaleFrame,
CV_BGR2GRAY);
        equalizeHist(grayscaleFrame,grayscaleFrame);
        std::vector<Rect> faces;
        face_cascade.detectMultiScale(grayscaleFrame,faces, 1.1, 3, 0,Size(20, 20));
        for (int i = 0; i < faces.size(); i++)
        {
            Point pt1(faces[i].x + faces[i].width, faces[i].y
+ faces[i].height);
            Point pt2(faces[i].x, faces[i].y);
            rectangle(img, pt1, pt2, cvScalar(0,255, 255, 0), 2, 8, 0);
        }
        imshow("Camera", img);
        waitKey(10);
    }
    return 0;
}
 
//函数介绍
/*
CV_WRAPVideoCapture(int index);
@paramindex = camera_id + domain_offset (CAP_*). id of the video capturing device toopen. If there is a single
cameraconnected, just pass 0. Advanced Usage: to open Camera 1 using the MS MediaFoundation API: index = 1 + CAP_MSMF
*/

源码下载：http://download.csdn.net/detail/cracent/9492683