少有人走的路勇哥的测试平台是vs2019+opencv3.1，下面的代码可用。
功能是打开usb摄像头，并保存每帧图片。
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/core/core.hpp>
#include<iostream>
#include <string>
#include <sstream>
using namespace cv;
using namespace std;
int main()
{
VideoCapture capture(0);
//设置摄像头
capture.set(CV_CAP_PROP_FRAME_WIDTH, 1280);
capture.set(CV_CAP_PROP_FRAME_HEIGHT, 720);
//确认是否成功打开摄像头
if (!capture.isOpened())
{
cout << "打开摄像头失败，退出" << endl;
exit(-1);
}
int i = 0;
std::string b = "yangben";//保存图片名称
std::string ext = ".jpg";
Mat frame(Size(1280, 720), CV_8UC3);
while (1)
{
if (!capture.read(frame))
break;
capture >> frame;
if (!frame.empty()) //很重要，确保摄像头已启动
{
imshow("window", frame);
std::string name(b);
std::ostringstream ss;
ss << i;
name += ss.str();
i++;
name += ext;
std::cout << name << std::endl;
cv::imwrite(name, frame);
}
if (waitKey(30) >= 0) break;//延时时间可调
}
return 0;
}本文出自勇哥的网站《少有人走的路》wwww.skcircle.com，转载请注明出处！讨论可扫码加群：
