Visual Servoing Platform  version 3.2.1 under development (2019-11-19)
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))
16  try {
19  vpImageIo::read(I, "bar-code.pgm");
20 
21 #ifdef VISP_HAVE_X11
22  vpDisplayX d(I);
23 #elif defined(VISP_HAVE_GDI)
24  vpDisplayGDI d(I);
25 #elif defined(VISP_HAVE_OPENCV)
26  vpDisplayOpenCV d(I);
27 #endif
28 
30  vpDetectorBase *detector = NULL;
32 
33 #if (defined(VISP_HAVE_ZBAR) && defined(VISP_HAVE_DMTX))
34  int opt_barcode = 0; // 0=QRCode, 1=DataMatrix
35 
36  for (int i = 0; i < argc; i++) {
37  if (std::string(argv[i]) == "--code-type")
38  opt_barcode = atoi(argv[i + 1]);
39  else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
40  std::cout << "Usage: " << argv[0] << " [--code-type <0 for QR code | 1 for DataMatrix code>] [--help] [-h]"
41  << std::endl;
42  return 0;
43  }
44  }
46  if (opt_barcode == 0)
47  detector = new vpDetectorQRCode;
48  else
49  detector = new vpDetectorDataMatrixCode;
51 #elif defined(VISP_HAVE_ZBAR)
52  detector = new vpDetectorQRCode;
53  (void)argc;
54  (void)argv;
55 #elif defined(VISP_HAVE_DMTX)
56  detector = new vpDetectorDataMatrixCode;
57  (void)argc;
58  (void)argv;
59 #endif
60 
62 
64  bool status = detector->detect(I);
66  std::ostringstream legend;
67  legend << detector->getNbObjects() << " bar code detected";
68  vpDisplay::displayText(I, (int)I.getHeight() - 30, 10, legend.str(), vpColor::red);
69 
71  if (status) {
72  for (size_t i = 0; i < detector->getNbObjects(); i++) {
75  std::vector<vpImagePoint> p = detector->getPolygon(i);
76  vpRect bbox = detector->getBBox(i);
80  vpDisplay::displayText(I, (int)(bbox.getTop() - 10), (int)bbox.getLeft(),
81  "Message: \"" + detector->getMessage(i) + "\"", vpColor::red);
83  for (size_t j = 0; j < p.size(); j++) {
84  vpDisplay::displayCross(I, p[j], 14, vpColor::red, 3);
85  std::ostringstream number;
86  number << j;
87  vpDisplay::displayText(I, p[j] + vpImagePoint(15, 5), number.str(), vpColor::blue);
88  }
89  }
90 
91  vpDisplay::displayText(I, (int)I.getHeight() - 15, 10, "A click to quit...", vpColor::red);
94  }
95  delete detector;
96  } catch (const vpException &e) {
97  std::cout << "Catch an exception: " << e.getMessage() << std::endl;
98  }
99 #else
100  (void)argc;
101  (void)argv;
102 #endif
103 }
vpRect getBBox(size_t i) const
double getTop() const
Definition: vpRect.h:181
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:129
static void displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:151
error that can be emited by ViSP classes.
Definition: vpException.h:71
size_t getNbObjects() const
virtual bool detect(const vpImage< unsigned char > &I)=0
static const vpColor green
Definition: vpColor.h:183
static void flush(const vpImage< unsigned char > &I)
static const vpColor red
Definition: vpColor.h:180
static void display(const vpImage< unsigned char > &I)
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
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)
double getLeft() const
Definition: vpRect.h:162
const char * getMessage(void) const
Definition: vpException.cpp:90
static void displayCross(const vpImage< unsigned char > &I, const vpImagePoint &ip, unsigned int size, const vpColor &color, unsigned int thickness=1)
unsigned int getHeight() const
Definition: vpImage.h:186
static void read(vpImage< unsigned char > &I, const std::string &filename)
Definition: vpImageIo.cpp:234
Defines a rectangle in the plane.
Definition: vpRect.h:78
Class that defines a 2D point in an image. This class is useful for image processing and stores only ...
Definition: vpImagePoint.h:88
std::vector< std::string > & getMessage()
static const vpColor blue
Definition: vpColor.h:186
std::vector< std::vector< vpImagePoint > > & getPolygon()