Working with See3CAM – USB3 Cameras and OpenCV

     #include "opencv2/video/tracking.hpp"
     #include "opencv2/imgproc/imgproc.hpp"
     #include "opencv2/highgui/highgui.hpp"
 
     #include <iostream>
     #include <ctype.h>
 
     using namespace cv;
     using namespace std;
 
    int main()
    {
    Mat CameraFrame;
    Mat Grey;
 
    VideoCapture cap;
    char keypressed;
 
    //Opens the first imaging device.
    cap.open(0);
 
    //Check whether user selected camera is opened successfully.
    if( !cap.isOpened() )
    {
    cout << "***Could not initialize capturing...***\n";
   return -1;
   }
 
   //Create a windows to display camera preview.
   namedWindow("Camera Preview", CV_WINDOW_AUTOSIZE);
   namedWindow("Camera Preview - Grayscale", CV_WINDOW_AUTOSIZE);
 
   //Loop infinitely to fetch frame from camera and display it.
   for(;;)
   {
   //Fetch frame from camera. So simple, isn't;-)
   cap >> CameraFrame;
 
   //Check whether received frame has valid pointer.
   if( CameraFrame.empty() )
   break;
 
   cvtColor(CameraFrame, Grey, CV_RGB2GRAY);
 
   //Display the received frame
   imshow("Camera Preview", CameraFrame);
   //Display the grey scale converted frame
   imshow("Camera Preview - Grayscale", Grey);
 
   //Wait for Escape keyevent to exit from loop
   keypressed = (char)waitKey(10);
   if( keypressed == 27 )
   break;
   }
 
   //Release the camera interface.
   cap.release();
 
   return 0;
   }