Opencv之摄像头人脸识别

代码如下：

#include "stdafx.h"

#include

 

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