Visual Servoing Platform  version 3.6.1 under development (2024-06-19)
tutorial-barcode-detector.cpp
1 #include <visp3/detection/vpDetectorDataMatrixCode.h>
4 #include <visp3/detection/vpDetectorQRCode.h>
6 #include <visp3/gui/vpDisplayGDI.h>
7 #include <visp3/gui/vpDisplayOpenCV.h>
8 #include <visp3/gui/vpDisplayX.h>
9 #include <visp3/io/vpImageIo.h>
10 
11 int main(int argc, const char **argv)
12 {
14 #if (defined(VISP_HAVE_ZBAR) || defined(VISP_HAVE_DMTX)) && \
15  (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV))
17 #ifdef ENABLE_VISP_NAMESPACE
18  using namespace VISP_NAMESPACE_NAME;
19 #endif
20  try {
22  vpImageIo::read(I, "bar-code.pgm");
23 
24 #ifdef VISP_HAVE_X11
25  vpDisplayX d(I);
26 #elif defined(VISP_HAVE_GDI)
27  vpDisplayGDI d(I);
28 #elif defined(HAVE_OPENCV_HIGHGUI)
29  vpDisplayOpenCV d(I);
30 #endif
31 
33  vpDetectorBase *detector = nullptr;
35 
36 #if (defined(VISP_HAVE_ZBAR) && defined(VISP_HAVE_DMTX))
37  int opt_barcode = 0; // 0=QRCode, 1=DataMatrix
38 
39  for (int i = 0; i < argc; i++) {
40  if (std::string(argv[i]) == "--code-type")
41  opt_barcode = atoi(argv[i + 1]);
42  else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
43  std::cout << "Usage: " << argv[0] << " [--code-type <0 for QR code | 1 for DataMatrix code>] [--help] [-h]"
44  << std::endl;
45  return EXIT_SUCCESS;
46  }
47  }
49  if (opt_barcode == 0)
50  detector = new vpDetectorQRCode;
51  else
52  detector = new vpDetectorDataMatrixCode;
54 #elif defined(VISP_HAVE_ZBAR)
55  detector = new vpDetectorQRCode;
56  (void)argc;
57  (void)argv;
58 #elif defined(VISP_HAVE_DMTX)
59  detector = new vpDetectorDataMatrixCode;
60  (void)argc;
61  (void)argv;
62 #endif
63 
65 
67  bool status = detector->detect(I);
69  std::ostringstream legend;
70  legend << detector->getNbObjects() << " bar code detected";
71  vpDisplay::displayText(I, (int)I.getHeight() - 30, 10, legend.str(), vpColor::red);
72 
74  if (status) {
75  for (size_t i = 0; i < detector->getNbObjects(); i++) {
78  std::vector<vpImagePoint> p = detector->getPolygon(i);
79  vpRect bbox = detector->getBBox(i);
83  vpDisplay::displayText(I, (int)(bbox.getTop() - 10), (int)bbox.getLeft(),
84  "Message: \"" + detector->getMessage(i) + "\"", vpColor::red);
86  for (size_t j = 0; j < p.size(); j++) {
87  vpDisplay::displayCross(I, p[j], 14, vpColor::red, 3);
88  std::ostringstream number;
89  number << j;
90  vpDisplay::displayText(I, p[j] + vpImagePoint(15, 5), number.str(), vpColor::blue);
91  }
92  }
93 
94  vpDisplay::displayText(I, (int)I.getHeight() - 15, 10, "A click to quit...", vpColor::red);
97  }
98  delete detector;
99 }
100  catch (const vpException &e) {
101  std::cout << "Catch an exception: " << e.getMessage() << std::endl;
102  }
103 #else
104  (void)argc;
105  (void)argv;
106 #endif
107 }
static const vpColor red
Definition: vpColor.h:213
static const vpColor blue
Definition: vpColor.h:219
static const vpColor green
Definition: vpColor.h:216
std::vector< std::vector< vpImagePoint > > & getPolygon()
vpRect getBBox(size_t i) const
size_t getNbObjects() const
std::vector< std::string > & getMessage()
virtual bool detect(const vpImage< unsigned char > &I)=0
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:132
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:131
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
static void display(const vpImage< unsigned char > &I)
static void displayCross(const vpImage< unsigned char > &I, const vpImagePoint &ip, unsigned int size, const vpColor &color, unsigned int thickness=1)
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 displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
error that can be emitted by ViSP classes.
Definition: vpException.h:60
const char * getMessage() const
Definition: vpException.cpp:65
static void read(vpImage< unsigned char > &I, const std::string &filename, int backend=IO_DEFAULT_BACKEND)
Definition: vpImageIo.cpp:147
Class that defines a 2D point in an image. This class is useful for image processing and stores only ...
Definition: vpImagePoint.h:82
unsigned int getHeight() const
Definition: vpImage.h:185
Defines a rectangle in the plane.
Definition: vpRect.h:79
double getLeft() const
Definition: vpRect.h:173
double getTop() const
Definition: vpRect.h:192