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//! \example tutorial-connected-components.cpp
#include <cstdlib>
#include <iostream>
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpImage.h>
#include <visp3/gui/vpDisplayFactory.h>
#include <visp3/io/vpImageIo.h>
#if defined(VISP_HAVE_MODULE_IMGPROC)
//! [Include]
#include <visp3/imgproc/vpImgproc.h>
//! [Include]
#endif
int main(int argc, const char **argv)
{
//! [Macro defined]
#if defined(VISP_HAVE_MODULE_IMGPROC) && (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV))
//! [Macro defined]
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif
std::string input_filename = "img.pgm";
vpImageMorphology::vpConnexityType connexity = vpImageMorphology::CONNEXITY_4;
for (int i = 1; i < argc; i++) {
if (std::string(argv[i]) == "--input" && i + 1 < argc) {
input_filename = std::string(argv[i + 1]);
}
else if (std::string(argv[i]) == "--connexity" && i + 1 < argc) {
connexity = (vpImageMorphology::vpConnexityType)atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
std::cout << "Usage: " << argv[0]
<< " [--input <input image>] [--connexity <0: 4-connexity, "
"1: 8-connexity>] [--help]"
<< std::endl;
return EXIT_SUCCESS;
}
}
//! [Read]
vpImage<unsigned char> I;
vpImageIo::read(I, input_filename);
//! [Read]
#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
std::shared_ptr<vpDisplay> display = vpDisplayFactory::createDisplay(I, 0, 0, "Input image");
#else
vpDisplay *display = vpDisplayFactory::allocateDisplay(I, 0, 0, "Input image");
#endif
//! [Connected components]
vpImage<int> labels;
int nbComponents = 0;
VISP_NAMESPACE_NAME::connectedComponents(I, labels, nbComponents, connexity);
std::cout << "nbComponents=" << nbComponents << std::endl;
//! [Connected components]
//! [Draw connected components]
vpImage<vpRGBa> I_conn(I.getHeight(), I.getWidth());
for (unsigned int i = 0; i < I_conn.getHeight(); i++) {
for (unsigned int j = 0; j < I_conn.getWidth(); j++) {
if (labels[i][j] != 0) {
I_conn[i][j] =
vpRGBa(vpColor::getColor(static_cast<unsigned int>(labels[i][j])).R,
vpColor::getColor(static_cast<unsigned int>(labels[i][j])).G,
vpColor::getColor(static_cast<unsigned int>(labels[i][j])).B);
}
}
}
//! [Draw connected components]
#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
std::shared_ptr<vpDisplay> display2 = vpDisplayFactory::createDisplay(I_conn, I.getWidth(), 10, "Connected components");
#else
vpDisplay *display2 = vpDisplayFactory::allocateDisplay(I_conn, I.getWidth(), 10, "Connected components");
#endif
vpDisplay::display(I);
vpDisplay::display(I_conn);
vpDisplay::displayText(I_conn, 20, 20, "Click to quit.", vpColor::red);
vpDisplay::flush(I);
vpDisplay::flush(I_conn);
vpDisplay::getClick(I_conn);
#if (VISP_CXX_STANDARD < VISP_CXX_STANDARD_11)
if (display != nullptr) {
delete display;
}
if (display2 != nullptr) {
delete display2;
}
#endif
#else
(void)argc;
(void)argv;
#endif
return EXIT_SUCCESS;
}
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