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//! \example tutorial-face-detector.cpp
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
//! [Include]
#include <visp3/detection/vpDetectorFace.h>
//! [Include]
#include <visp3/io/vpVideoReader.h>
int main(int argc, const char *argv[])
{
//! [Macro defined]
#if defined(VISP_HAVE_OPENCV) && defined(HAVE_OPENCV_HIGHGUI) && defined(HAVE_OPENCV_IMGPROC) && defined(HAVE_OPENCV_OBJDETECT)
//! [Macro defined]
try {
//! [Default settings]
std::string opt_face_cascade_name = "./haarcascade_frontalface_alt.xml";
std::string opt_video = "video.mp4";
//! [Default settings]
for (int i = 0; i < argc; i++) {
if (std::string(argv[i]) == "--haar")
opt_face_cascade_name = std::string(argv[i + 1]);
else if (std::string(argv[i]) == "--video")
opt_video = std::string(argv[i + 1]);
else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
std::cout << "Usage: " << argv[0] << " [--haar <haarcascade xml filename>] [--video <input video file>]"
<< " [--help] [-h]" << std::endl;
return EXIT_SUCCESS;
}
}
vpImage<unsigned char> I;
vpVideoReader g;
g.setFileName(opt_video);
g.open(I);
#if defined(VISP_HAVE_X11)
vpDisplayX d(I);
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI d(I);
#elif defined(HAVE_OPENCV_HIGHGUI)
vpDisplayOpenCV d(I);
#endif
vpDisplay::setTitle(I, "ViSP viewer");
//! [Face detector construction]
vpDetectorFace face_detector;
//! [Face detector construction]
//! [Face detector setting]
face_detector.setCascadeClassifierFile(opt_face_cascade_name);
//! [Face detector setting]
bool exit_requested = false;
while (!g.end() && !exit_requested) {
g.acquire(I);
vpDisplay::display(I);
//! [Face detection]
bool face_found = face_detector.detect(I);
//! [Face detection]
if (face_found) {
std::ostringstream text;
//! [Get number faces]
text << "Found " << face_detector.getNbObjects() << " face(s)";
//! [Get number faces]
vpDisplay::displayText(I, 10, 10, text.str(), vpColor::red);
//! [Get face characteristics]
for (size_t i = 0; i < face_detector.getNbObjects(); i++) {
vpRect bbox = face_detector.getBBox(i);
vpDisplay::displayRectangle(I, bbox, vpColor::green, false, 4);
vpDisplay::displayText(I, (int)bbox.getTop() - 10, (int)bbox.getLeft(),
"Message: \"" + face_detector.getMessage(i) + "\"", vpColor::red);
}
//! [Get face characteristics]
}
vpDisplay::displayText(I, (int)I.getHeight() - 25, 10, "Click to quit...", vpColor::red);
vpDisplay::flush(I);
if (vpDisplay::getClick(I, false)) // a click to exit
exit_requested = true;
}
if (!exit_requested)
vpDisplay::getClick(I);
} catch (const vpException &e) {
std::cout << e.getMessage() << std::endl;
}
#else
(void)argc;
(void)argv;
#endif
}
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