tutorial-image-viewer.cpp

#include <visp3/core/vpConfig.h>
#include <visp3/core/vpImagePoint.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/io/vpImageIo.h>
 
int main()
{
#ifdef ENABLE_VISP_NAMESPACE
  using namespace VISP_NAMESPACE_NAME;
#endif
 
  try {
    vpImage<vpRGBa> I;
    vpImageIo::read(I, "monkey.ppm");
 
#if defined(VISP_HAVE_X11)
    vpDisplayX d(I);
#elif defined(VISP_HAVE_GDI)
    vpDisplayGDI d(I);
#elif defined(HAVE_OPENCV_HIGHGUI)
    vpDisplayOpenCV d(I);
#else
    std::cout << "No image viewer is available..." << std::endl;
#endif
    vpDisplay::setTitle(I, "Monkey");
    vpDisplay::display(I);
 
    vpDisplay::displayRectangle(I, vpImagePoint(90, 90), 70, 90, vpColor::red, false, 2);
    vpDisplay::flush(I);
 
    vpImage<vpRGBa> O;
    vpDisplay::getImage(I, O);
 
    try {
      vpImageIo::write(I, "monkey-out.jpg");
      vpImageIo::write(O, "monkey-out-with-overlay.jpg");
    }
    catch (...) {
      std::cout << "Cannot write the image: unsupported format..." << std::endl;
    }
 
    vpDisplay::getClick(I);
  }
  catch (const vpException &e) {
    std::cout << "Catch an exception: " << e << std::endl;
  }
}