Opencv&C++获取摄像头

#include <stdio.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace cv;
using namespace std;

int main()
{
//抓取摄影栈
VideoCapture cap(0);

//尝试开放摄影栈
if (!cap.isOpened()) return -1;

//用矩阵记录抓取的每张frame
Mat frame;

//建立一个视窗,名称为camera
namedWindow("camera", 1);

for (;;)
{
//把取得的影像放置到矩阵中
cap >> frame;

//演示frame到camera名称的视窗
imshow("frame", frame);

if (waitKey(30) >= 0) break;
}
system("PAUSE");
return 0;
}