Display 2 Images in 1 Window with OpenCV

OpenCV_Display_2_Images_in_1_Window.cpp

#include "opencv2/opencv.hpp"

int display(){

	//cv::VideoCapture cap1(0); // open the default camera
	cv::VideoCapture cap1(0); // open the first camera
	cv::VideoCapture cap2(1); // open the second camera
    
	if(!cap1.isOpened())  // check if we succeeded
        return -1;

	if(!cap2.isOpened())  // check if we succeeded
        return -1;

	for(;;)
  	{
		cv::Mat frame1, frame2;
    		cap1 >> frame1; // get a new frame from camera
		cap2 >> frame2; // get a new frame from camera
		cv::Mat display (frame1.size().height, frame1.size().width + frame2.size().width, CV_8UC3) ;

		cv::Mat left(display, cv::Rect(0, 0, frame1.size().width, frame1.size().height));
		frame1.copyTo(left);
		cv::Mat right(display, cv::Rect(frame1.size().width, 0, frame2.size().width, frame2.size().height));
		frame2.copyTo(right);

		cv::imshow("Display", display);
		int key = cv::waitKey(1);
	}

  return 0;

}