打开双目摄像头，连续截取并分割为左右画面进行保存

#include 
#include 
#include 
#include 
using namespace std;
using namespace cv;
int main()
{
    char c = 0;
    VideoCapture capture(0);
    Mat cam ;
    int i, j = 0;
    char filename[10];
    while (capture.read(cam))   //循环读取摄像画面帧capture >> cam
    {
        int w, h ;
        w= cam.cols;  //获取相机画面宽高
        h= cam.rows;      
        imshow("cam",cam);        
        Rect rect0(0, 0, w/2, h); //(x,y,width,height)定义矩形框截取
        Mat caml = cam(rect0); //截取左摄像头画面
        Rect rect1(w/2, 0, w/2, h);
        Mat camr = cam(rect1); //截取右半边

        c = cvWaitKey(10);
        if(c == 'c') //按c键采集图像
        {
            sprintf(filename, "left%d.jpg",i++);
            imwrite(filename, caml);
            sprintf(filename, "right%d.jpg",j++);
            imwrite(filename, camr);
            cout<<"capture ok!"<