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//! \example tutorial-barcode-detector-live.cpp
#include <iostream>
#include <visp3/core/vpConfig.h>
//! [Undef grabber]
// Comment / uncomment following lines to use the specific 3rd party compatible with your camera
// #undef VISP_HAVE_V4L2
// #undef HAVE_OPENCV_HIGHGUI
// #undef HAVE_OPENCV_VIDEOIO
//! [Undef grabber]
#if (defined(VISP_HAVE_ZBAR) || defined(VISP_HAVE_DMTX)) && (defined(VISP_HAVE_V4L2) || \
((VISP_HAVE_OPENCV_VERSION < 0x030000) && defined(HAVE_OPENCV_HIGHGUI))|| ((VISP_HAVE_OPENCV_VERSION >= 0x030000) && defined(HAVE_OPENCV_VIDEOIO)))
#include <visp3/core/vpImageConvert.h>
#include <visp3/detection/vpDetectorDataMatrixCode.h>
#include <visp3/detection/vpDetectorQRCode.h>
#include <visp3/gui/vpDisplayFactory.h>
#ifdef VISP_HAVE_MODULE_SENSOR
#include <visp3/sensor/vpV4l2Grabber.h>
#endif
#if (VISP_HAVE_OPENCV_VERSION < 0x030000) && defined(HAVE_OPENCV_HIGHGUI)
#include <opencv2/highgui/highgui.hpp> // for cv::VideoCapture
#elif (VISP_HAVE_OPENCV_VERSION >= 0x030000) && defined(HAVE_OPENCV_VIDEOIO)
#include <opencv2/videoio/videoio.hpp> // for cv::VideoCapture
#endif
int main(int argc, const char **argv)
{
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif
int opt_device = 0;
int opt_barcode = 0; // 0=QRCode, 1=DataMatrix
for (int i = 1; i < argc; i++) {
if (std::string(argv[i]) == "--device" && i + 1 < argc) {
opt_device = atoi(argv[++i]);
}
else if (std::string(argv[i]) == "--code-type" && i + 1 < argc) {
opt_barcode = atoi(argv[++i]);
}
else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
std::cout << "Usage: " << argv[0]
<< " [--device <camera number>]"
<< " [--code-type <0 for QR code | 1 for DataMatrix code>]"
<< " [--help] [-h]"
<< std::endl;
return EXIT_SUCCESS;
}
}
std::cout << "Use device: " << opt_device << std::endl;
#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
std::shared_ptr<vpDisplay> display;
#else
vpDisplay *display = nullptr;
#endif
try {
vpImage<unsigned char> I; // for gray images
//! [Construct grabber]
#if defined(VISP_HAVE_V4L2)
vpV4l2Grabber g;
std::ostringstream device;
device << "/dev/video" << opt_device;
g.setDevice(device.str());
g.setScale(1);
g.acquire(I);
#elif ((VISP_HAVE_OPENCV_VERSION < 0x030000) && defined(HAVE_OPENCV_HIGHGUI))|| ((VISP_HAVE_OPENCV_VERSION >= 0x030000) && defined(HAVE_OPENCV_VIDEOIO))
cv::VideoCapture cap(opt_device); // open the default camera
if (!cap.isOpened()) { // check if we succeeded
std::cout << "Failed to open the camera" << std::endl;
return EXIT_FAILURE;
}
cv::Mat frame;
cap >> frame; // get a new frame from camera
vpImageConvert::convert(frame, I);
#endif
//! [Construct grabber]
#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
display = vpDisplayFactory::createDisplay(I);
#else
display = vpDisplayFactory::allocateDisplay(I);
#endif
vpDisplay::setTitle(I, "ViSP viewer");
vpDetectorBase *detector = nullptr;
#if (defined(VISP_HAVE_ZBAR) && defined(VISP_HAVE_DMTX))
if (opt_barcode == 0)
detector = new vpDetectorQRCode;
else
detector = new vpDetectorDataMatrixCode;
#elif defined(VISP_HAVE_ZBAR)
detector = new vpDetectorQRCode;
(void)opt_barcode;
#elif defined(VISP_HAVE_DMTX)
detector = new vpDetectorDataMatrixCode;
(void)opt_barcode;
#endif
for (;;) {
//! [Acquisition]
#if defined(VISP_HAVE_V4L2)
g.acquire(I);
#elif ((VISP_HAVE_OPENCV_VERSION < 0x030000) && defined(HAVE_OPENCV_HIGHGUI))|| ((VISP_HAVE_OPENCV_VERSION >= 0x030000) && defined(HAVE_OPENCV_VIDEOIO))
cap >> frame; // get a new frame from camera
vpImageConvert::convert(frame, I);
#endif
//! [Acquisition]
vpDisplay::display(I);
bool status = detector->detect(I);
std::ostringstream legend;
legend << detector->getNbObjects() << " bar code detected";
vpDisplay::displayText(I, 10, 10, legend.str(), vpColor::red);
if (status) {
for (size_t i = 0; i < detector->getNbObjects(); i++) {
std::vector<vpImagePoint> p = detector->getPolygon(i);
vpRect bbox = detector->getBBox(i);
vpDisplay::displayRectangle(I, bbox, vpColor::green);
vpDisplay::displayText(I, static_cast<int>(bbox.getTop()) - 20, static_cast<int>(bbox.getLeft()),
"Message: \"" + detector->getMessage(i) + "\"", vpColor::red);
for (size_t j = 0; j < p.size(); j++) {
vpDisplay::displayCross(I, p[j], 14, vpColor::red, 3);
std::ostringstream number;
number << j;
vpDisplay::displayText(I, p[j] + vpImagePoint(10, 0), number.str(), vpColor::blue);
}
}
}
vpDisplay::displayText(I, static_cast<int>(I.getHeight()) - 25, 10, "Click to quit...", vpColor::red);
vpDisplay::flush(I);
if (vpDisplay::getClick(I, false)) // a click to exit
break;
}
delete detector;
}
catch (const vpException &e) {
std::cout << "Catch an exception: " << e << std::endl;
}
#if (VISP_CXX_STANDARD < VISP_CXX_STANDARD_11)
if (display != nullptr) {
delete display;
}
#endif
}
#else
int main()
{
std::cout << "There are missing 3rd parties to run this tutorial" << std::endl;
}
#endif
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