Visual Servoing Platform  version 3.2.1 under development (2019-09-17) under development (2019-09-17)
vpDetectorQRCode.cpp
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29  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
30  *
31  * Description:
32  * Base class for bar code detection.
33  *
34  * Authors:
35  * Fabien Spindler
36  *
37  *****************************************************************************/
38 
39 #include <visp3/core/vpConfig.h>
40 
41 #ifdef VISP_HAVE_ZBAR
42 
43 #include <visp3/detection/vpDetectorQRCode.h>
44 
49 {
50  // configure the reader
51  m_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
52 }
53 
61 {
62  bool detected = false;
63  m_message.clear();
64  m_polygon.clear();
65  m_nb_objects = 0;
66 
67  m_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
68  unsigned int width = I.getWidth();
69  unsigned int height = I.getHeight();
70 
71  // wrap image data
72  zbar::Image img(width, height, "Y800", I.bitmap, (unsigned long)(width * height));
73 
74  // scan the image for barcodes
75  m_nb_objects = (size_t)m_scanner.scan(img);
76 
77  // extract results
78  for (zbar::Image::SymbolIterator symbol = img.symbol_begin(); symbol != img.symbol_end(); ++symbol) {
79  m_message.push_back(symbol->get_data());
80  detected = true;
81 
82  std::vector<vpImagePoint> polygon;
83  for (unsigned int i = 0; i < (unsigned int)symbol->get_location_size(); i++) {
84  polygon.push_back(vpImagePoint(symbol->get_location_y(i), symbol->get_location_x(i)));
85  }
86  m_polygon.push_back(polygon);
87  }
88 
89  // clean up
90  img.set_data(NULL, 0);
91 
92  return detected;
93 }
94 #elif !defined(VISP_BUILD_SHARED_LIBS)
95 // Work arround to avoid warning: libvisp_core.a(vpDetectorQRCode.cpp.o) has
96 // no symbols
97 void dummy_vpDetectorQRCode(){};
98 #endif
Type * bitmap
points toward the bitmap
Definition: vpImage.h:141
bool detect(const vpImage< unsigned char > &I)
size_t m_nb_objects
Number of detected objects.
zbar::ImageScanner m_scanner
QR code detector.
unsigned int getHeight() const
Definition: vpImage.h:186
std::vector< std::vector< vpImagePoint > > m_polygon
For each object, defines the polygon that contains the object.
Class that defines a 2D point in an image. This class is useful for image processing and stores only ...
Definition: vpImagePoint.h:88
unsigned int getWidth() const
Definition: vpImage.h:244
std::vector< std::string > m_message
Message attached to each object.