Visual Servoing Platform  version 3.6.1 under development (2024-10-14)
vpDetectorQRCode.cpp
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30  *
31  * Description:
32  * Base class for bar code detection.
33  *
34 *****************************************************************************/
35 
36 #include <visp3/core/vpConfig.h>
37 
38 #ifdef VISP_HAVE_ZBAR
39 
40 #include <visp3/detection/vpDetectorQRCode.h>
41 
42 BEGIN_VISP_NAMESPACE
46 vpDetectorQRCode::vpDetectorQRCode() : m_scanner()
47 {
48  // configure the reader
49  m_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
50 }
51 
58 bool vpDetectorQRCode::detect(const vpImage<unsigned char> &I)
59 {
60  bool detected = false;
61  m_message.clear();
62  m_polygon.clear();
63  m_nb_objects = 0;
64 
65  m_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
66  unsigned int width = I.getWidth();
67  unsigned int height = I.getHeight();
68 
69  // wrap image data
70  zbar::Image img(width, height, "Y800", I.bitmap, (unsigned long)(width * height));
71 
72  // scan the image for barcodes
73  m_nb_objects = (size_t)m_scanner.scan(img);
74 
75  // extract results
76  for (zbar::Image::SymbolIterator symbol = img.symbol_begin(); symbol != img.symbol_end(); ++symbol) {
77  m_message.push_back(symbol->get_data());
78  detected = true;
79 
80  std::vector<vpImagePoint> polygon;
81  for (unsigned int i = 0; i < (unsigned int)symbol->get_location_size(); i++) {
82  polygon.push_back(vpImagePoint(symbol->get_location_y(i), symbol->get_location_x(i)));
83  }
84  m_polygon.push_back(polygon);
85  }
86 
87  // clean up
88  img.set_data(nullptr, 0);
89 
90  return detected;
91 }
92 END_VISP_NAMESPACE
93 #elif !defined(VISP_BUILD_SHARED_LIBS)
94 // Work around to avoid warning: libvisp_core.a(vpDetectorQRCode.cpp.o) has
95 // no symbols
96 void dummy_vpDetectorQRCode() { };
97 #endif
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 getWidth() const
Definition: vpImage.h:242
Type * bitmap
points toward the bitmap
Definition: vpImage.h:135
unsigned int getHeight() const
Definition: vpImage.h:181