Visual Servoing Platform version 3.5.0
tutorial-barcode-detector.cpp
1
3#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
11int 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))
17 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++) {
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}
static const vpColor red
Definition: vpColor.h:217
static const vpColor blue
Definition: vpColor.h:223
static const vpColor green
Definition: vpColor.h:220
std::vector< std::vector< vpImagePoint > > & getPolygon()
vpRect getBBox(size_t i) const
std::vector< std::string > & getMessage()
size_t getNbObjects() const
virtual bool detect(const vpImage< unsigned char > &I)=0
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:129
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:135
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
static void display(const vpImage< unsigned char > &I)
static void displayCross(const vpImage< unsigned char > &I, const vpImagePoint &ip, unsigned int size, const vpColor &color, unsigned int thickness=1)
static void flush(const vpImage< unsigned char > &I)
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)
static void displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
error that can be emited by ViSP classes.
Definition: vpException.h:72
const char * getMessage() const
Definition: vpException.cpp:90
static void read(vpImage< unsigned char > &I, const std::string &filename, int backend=IO_DEFAULT_BACKEND)
Definition: vpImageIo.cpp:149
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 getHeight() const
Definition: vpImage.h:188
Defines a rectangle in the plane.
Definition: vpRect.h:80
double getLeft() const
Definition: vpRect.h:174
double getTop() const
Definition: vpRect.h:193