Visual Servoing Platform  version 3.5.1 under development (2022-07-01)
tutorial-export-image.cpp
1 #include <visp3/gui/vpDisplayD3D.h>
3 #include <visp3/gui/vpDisplayGDI.h>
4 #include <visp3/gui/vpDisplayGTK.h>
5 #include <visp3/gui/vpDisplayOpenCV.h>
6 #include <visp3/gui/vpDisplayX.h>
7 #include <visp3/io/vpImageIo.h>
8 
9 int main()
10 {
11  vpImage<unsigned char> I(240, 320, 255); // Create a black grey level image
12  vpImage<vpRGBa> Ioverlay;
13 
14  // Depending on the detected third party libraries, we instantiate here the
15  // first video device which is available
16 #if defined(VISP_HAVE_X11)
17  vpDisplay *d = new vpDisplayX;
18 #elif defined(VISP_HAVE_GTK)
19  vpDisplay *d = new vpDisplayGTK;
20 #elif defined(VISP_HAVE_GDI)
21  vpDisplay *d = new vpDisplayGDI;
22 #elif defined(VISP_HAVE_D3D9)
23  vpDisplay *d = new vpDisplayD3D;
24 #elif defined(VISP_HAVE_OPENCV)
25  vpDisplay *d = new vpDisplayOpenCV;
26 #endif
27  // Initialize the display with the image I. Display and image are
28  // now link together.
29 #ifdef VISP_HAVE_DISPLAY
30  d->init(I);
31 #endif
32  // Set the display background with image I content
34  // Draw a red rectangle in the display overlay (foreground)
35  vpDisplay::displayRectangle(I, 10, 10, 100, 20, vpColor::red, true);
36  // Flush the foreground and background display
38  // Updates the color image with the original loaded image and the overlay
39  vpDisplay::getImage(I, Ioverlay);
40  // Write the color image on the disk
41  std::cout << "Save image in overlay.ppm" << std::endl;
42  std::string ofilename("overlay.png");
43  vpImageIo::write(Ioverlay, ofilename);
44  // Wait for a click in the display window
45  std::cout << "A click to quit..." << std::endl;
47 #ifdef VISP_HAVE_DISPLAY
48  delete d;
49 #endif
50 }
static const vpColor red
Definition: vpColor.h:217
Display for windows using Direct3D 3rd party. Thus to enable this class Direct3D should be installed....
Definition: vpDisplayD3D.h:107
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:129
The vpDisplayGTK allows to display image using the GTK 3rd party library. Thus to enable this class G...
Definition: vpDisplayGTK.h:135
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:135
void init(vpImage< unsigned char > &I, int win_x=-1, int win_y=-1, const std::string &win_title="")
Class that defines generic functionnalities for display.
Definition: vpDisplay.h:178
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
static void display(const vpImage< unsigned char > &I)
static void getImage(const vpImage< unsigned char > &Is, vpImage< vpRGBa > &Id)
Definition: vpDisplay.cpp:144
static void flush(const vpImage< unsigned char > &I)
static void displayRectangle(const vpImage< unsigned char > &I, const vpImagePoint &topLeft, unsigned int width, unsigned int height, const vpColor &color, bool fill=false, unsigned int thickness=1)
static void write(const vpImage< unsigned char > &I, const std::string &filename, int backend=IO_DEFAULT_BACKEND)
Definition: vpImageIo.cpp:292