실시간 캠화면 보기 Live Cam

/**
@file videocapture_basic.cpp
@brief A very basic sample for using VideoCapture and VideoWriter
@author PkLab.net
@date Aug 24, 2016
*/
 
#include <opencv2/opencv.hpp>
#include <iostream>
#include <stdio.h>
 
using namespace cv;
using namespace std;
 
int main(int, char**)
{
    Mat frame;
    //--- INITIALIZE VIDEOCAPTURE
    VideoCapture cap;
    // open the default camera using default API
    cap.open(0);
    // OR advance usage: select any API backend
    int deviceID = 0;             // 0 = open default camera
    int apiID = cv::CAP_ANY;      // 0 = autodetect default API
                                  // open selected camera using selected API
    cap.open(deviceID + apiID);
    // check if we succeeded
    if (!cap.isOpened()) {
        cerr << "ERROR! Unable to open camera\n";
        return -1;
    }
 
    //--- GRAB AND WRITE LOOP
    cout << "Start grabbing" << endl
        << "Press any key to terminate" << endl;
    for (;;)
    {
        // wait for a new frame from camera and store it into 'frame'
        cap.read(frame);
        // check if we succeeded
        if (frame.empty()) {
            cerr << "ERROR! blank frame grabbed\n";
            break;
        }
        // show live and wait for a key with timeout long enough to show images
        imshow("Live", frame);
        if (waitKey(5) >= 0)
            break;
    }
    // the camera will be deinitialized automatically in VideoCapture destructor
    return 0;
}

웹캠으로부터 캡처된 영상을 보여주는 창이 보입니다. 아무 키나 누르면 실행이 중단됩니다.