tutorial-grabber-opencv-bis.cpp

#include <stdlib.h>
#include <visp/vpDisplayOpenCV.h>
#include <visp/vpImageConvert.h>

// usage: binary <device name>
// device name: 0 is the default to dial with the first camera,
// 1 to dial with a second camera attached to the computer
int main(int argc, char** argv)
{
  int device = 0;
  if (argc > 1)
    device = atoi(argv[1]);
  std::cout << "Use device: " << device << std::endl;

#if defined(VISP_HAVE_OPENCV) && (VISP_HAVE_OPENCV_VERSION >= 0x020100)
  cv::VideoCapture cap(device); // open the default camera
  if(!cap.isOpened()) { // check if we succeeded
    std::cout << "Failed to open the camera" << std::endl;
    return -1;
  }
  cv::Mat frame;
  cap >> frame; // get a new frame from camera
  std::cout << "Image size: " << frame.rows << " " << frame.cols << std::endl;

  //vpImage<vpRGBa> I; // for color images
  vpImage<unsigned char> I; // for gray images
  vpImageConvert::convert(frame, I);
  vpDisplayOpenCV d(I);
  for(;;) {
    cap >> frame; // get a new frame from camera
    // Convert the image in ViSP format and display it
    vpImageConvert::convert(frame, I);
    vpDisplay::display(I);
    vpDisplay::flush(I);
    if (vpDisplay::getClick(I, false)) // a click to exit
      break;
  }
#endif
}