Visual Servoing Platform  version 3.6.1 under development (2024-03-29)
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 
46 {
47  // configure the reader
48  m_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
49 }
50 
58 {
59  bool detected = false;
60  m_message.clear();
61  m_polygon.clear();
62  m_nb_objects = 0;
63 
64  m_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
65  unsigned int width = I.getWidth();
66  unsigned int height = I.getHeight();
67 
68  // wrap image data
69  zbar::Image img(width, height, "Y800", I.bitmap, (unsigned long)(width * height));
70 
71  // scan the image for barcodes
72  m_nb_objects = (size_t)m_scanner.scan(img);
73 
74  // extract results
75  for (zbar::Image::SymbolIterator symbol = img.symbol_begin(); symbol != img.symbol_end(); ++symbol) {
76  m_message.push_back(symbol->get_data());
77  detected = true;
78 
79  std::vector<vpImagePoint> polygon;
80  for (unsigned int i = 0; i < (unsigned int)symbol->get_location_size(); i++) {
81  polygon.push_back(vpImagePoint(symbol->get_location_y(i), symbol->get_location_x(i)));
82  }
83  m_polygon.push_back(polygon);
84  }
85 
86  // clean up
87  img.set_data(nullptr, 0);
88 
89  return detected;
90 }
91 #elif !defined(VISP_BUILD_SHARED_LIBS)
92 // Work around to avoid warning: libvisp_core.a(vpDetectorQRCode.cpp.o) has
93 // no symbols
94 void dummy_vpDetectorQRCode(){};
95 #endif
std::vector< std::string > m_message
Message attached to each object.
std::vector< std::vector< vpImagePoint > > m_polygon
For each object, defines the polygon that contains the object.
size_t m_nb_objects
Number of detected objects.
zbar::ImageScanner m_scanner
QR code detector.
bool detect(const vpImage< unsigned char > &I) vp_override
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:245
Type * bitmap
points toward the bitmap
Definition: vpImage.h:139
unsigned int getHeight() const
Definition: vpImage.h:184