217     vpImage<unsigned char> Iref;  in main()  local
236       vpImageIo::read(Iref, filenameRef);  in main()
266       display[0].init(Iref, 100, 100, "Reference image");  in main()
272       vpDisplay::display(Iref);  in main()
274       vpDisplay::flush(Iref);  in main()
289         vpDisplay::getClick(Iref, corners[i]);  in main()
292       vpDisplay::displayRectangle(Iref, corners[0], corners[1], vpColor::red);  in main()
293       vpDisplay::flush(Iref);  in main()
299       nbrRef = surf.buildReference(Iref, corners[0], height, width);  in main()
303       nbrRef = surf.buildReference(Iref);  in main()
313       display[1].init(Icur, (int)(100 + Iref.getWidth()), 100, "Current image");  in main()
350       surf.display(Iref, Icur, 7);  in main()
351       vpDisplay::flush(Iref);  in main()
355         vpDisplay::getClick(Iref);  in main()