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//! \example tutorial-blob-tracker-live-v4l2.cpp
#include <visp3/core/vpConfig.h>
#ifdef VISP_HAVE_MODULE_SENSOR
#include <visp3/sensor/vpV4l2Grabber.h>
#endif
#include <visp3/blob/vpDot2.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayGTK.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#if defined(HAVE_OPENCV_VIDEOIO)
#include <opencv2/videoio.hpp>
#endif
int main(int argc, char **argv)
{
#if ((defined(VISP_HAVE_V4L2) || defined(HAVE_OPENCV_VIDEOIO)) && \
(defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV) || defined(VISP_HAVE_GTK)))
int device = 0;
if (argc == 2) {
device = std::atoi(argv[1]);
}
vpImage<unsigned char> I; // Create a gray level image container
std::stringstream ss;
ss << "/dev/video" << device;
std::cout << "Connect to: " << ss.str() << std::endl;
#if defined(VISP_HAVE_V4L2)
vpV4l2Grabber g;
g.setDevice(ss.str());
g.open(I);
#elif defined(HAVE_OPENCV_VIDEOIO)
cv::VideoCapture g(device); // open the default camera
if (!g.isOpened()) { // check if we succeeded
std::cout << "Failed to open the camera" << std::endl;
return EXIT_FAILURE;
}
cv::Mat frame;
g >> frame; // get a new frame from camera
vpImageConvert::convert(frame, I);
#endif
#if defined(VISP_HAVE_X11)
vpDisplayX d(I, 0, 0, "Camera view");
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI d(I, 0, 0, "Camera view");
#elif defined(HAVE_OPENCV_HIGHGUI)
vpDisplayOpenCV d(I, 0, 0, "Camera view");
#elif defined(VISP_HAVE_GTK)
vpDisplayGTK d(I, 0, 0, "Camera view");
#endif
vpDot2 blob;
blob.setGraphics(true);
blob.setGraphicsThickness(2);
vpImagePoint germ;
bool init_done = false;
std::cout << "Click!!!" << std::endl;
while (1) {
try {
#if defined(VISP_HAVE_V4L2)
g.acquire(I);
#elif defined(HAVE_OPENCV_VIDEOIO)
g >> frame;
vpImageConvert::convert(frame, I);
#endif
vpDisplay::display(I);
if (!init_done) {
vpDisplay::displayText(I, vpImagePoint(10, 10), "Click in the blob to initialize the tracker", vpColor::red);
if (vpDisplay::getClick(I, germ, false)) {
blob.initTracking(I, germ);
init_done = true;
}
}
else {
blob.track(I);
}
vpDisplay::flush(I);
}
catch (...) {
init_done = false;
}
}
#else
(void)argc;
(void)argv;
#endif
}
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