opencv+c++调用摄像头并且拍照自动生成图片存放在本地

#include <opencv2/core.hpp> 
#include <opencv2/imgcodecs.hpp> 
#include <opencv2/highgui.hpp>
#include <opencv2/opencv.hpp> 
#include <iostream> 

using namespace cv; 
using namespace std;
 
int main() 
{
   
    
 //两个相机同时打开，初始化并分配内存以从摄像机加载视频流，分辨率为320*240、1280*720（延迟太大）、720*480 
 //initialize and allocate memory to load the video stream from camera 
 VideoCapture camera0(0);
 camera0.set(CAP_PROP_FRAME_WIDTH,