Visual Servoing Platform  version 3.6.1 under development (2024-04-23)
vpDetectorQRCode.cpp
1 /****************************************************************************
2  *
3  * ViSP, open source Visual Servoing Platform software.
4  * Copyright (C) 2005 - 2023 by Inria. All rights reserved.
5  *
6  * This software is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  * See the file LICENSE.txt at the root directory of this source
11  * distribution for additional information about the GNU GPL.
12  *
13  * For using ViSP with software that can not be combined with the GNU
14  * GPL, please contact Inria about acquiring a ViSP Professional
15  * Edition License.
16  *
17  * See https://visp.inria.fr for more information.
18  *
19  * This software was developed at:
20  * Inria Rennes - Bretagne Atlantique
21  * Campus Universitaire de Beaulieu
22  * 35042 Rennes Cedex
23  * France
24  *
25  * If you have questions regarding the use of this file, please contact
26  * Inria at visp@inria.fr
27  *
28  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
29  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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