按键拍照

#include
#include
#include
#include
#include
using namespace cv;
using namespace std;

int main(int argc, char* argv)
{
    VideoCapture  capture(1);
    Mat frame;
    if (!capture.isOpened())
    {
        cout << "摄像头打开失败！" << endl;
        return -1;
    }
    char key;
    char filename[50];
    int count = 0;
    namedWindow("【视频】", 1);
    namedWindow("【图片】", 1);
    while (1)
    {
        key = waitKey(50);
        capture >> frame;
        resize(frame, frame, Size(720, 540));
        imshow("【视频】", frame);

        if (key == 27)
            break;//按ESC键退出程序
        if (key == 32)//按空格键进行拍照
        {
            sprintf_s(filename, "%d.jpg", ++count);
            cout << count << endl;
            imwrite(filename, frame);//图片保存到本工程目录中
            imshow("【图片】", frame);
        }
    }
    return 0;
}