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//! \example tutorial-count-coins.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/core/vpMomentObject.h>
#include <visp3/imgproc/vpImgproc.h>
//! [Include]
#endif
int main(int argc, char *argv[])
{
//! [Macro defined]
#if defined(VISP_HAVE_MODULE_IMGPROC) && defined(VISP_HAVE_DISPLAY)
//! [Macro defined]
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif
std::string input_filename = "coins1.jpg";
VISP_NAMESPACE_NAME::vpAutoThresholdMethod method = VISP_NAMESPACE_NAME::AUTO_THRESHOLD_OTSU;
bool white_foreground = false;
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]) == "--method" && i + 1 < argc) {
method = static_cast<VISP_NAMESPACE_NAME::vpAutoThresholdMethod>(atoi(argv[i + 1]));
}
else if (std::string(argv[i]) == "--white_foreground") {
white_foreground = true;
}
else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
std::cout << "Usage: " << argv[0]
<< " [--input <input image>]"
" [--method <0: Huang, 1: Intermodes, 2: IsoData, 3: "
"Mean, 4: Otsu, 5: Triangle>]"
" [--white_foreground]"
" [--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(), display2 = vpDisplayFactory::createDisplay(),
display3 = vpDisplayFactory::createDisplay(), display4 = vpDisplayFactory::createDisplay(), display5 = vpDisplayFactory::createDisplay();
#else
vpDisplay *display = vpDisplayFactory::allocateDisplay();
vpDisplay *display2 = vpDisplayFactory::allocateDisplay();
vpDisplay *display3 = vpDisplayFactory::allocateDisplay();
vpDisplay *display4 = vpDisplayFactory::allocateDisplay();
vpDisplay *display5 = vpDisplayFactory::allocateDisplay();
#endif
display->init(I, 0, 0, "Coins");
vpImage<unsigned char> I_bin, I_fill;
//! [Binarisation]
I_bin = I;
VISP_NAMESPACE_NAME::autoThreshold(I_bin, method, white_foreground ? 0 : 255, white_foreground ? 255 : 0);
//! [Binarisation]
display2->init(I_bin, I.getWidth(), 0, "Binarisation");
//! [Fill holes]
I_fill = I_bin;
VISP_NAMESPACE_NAME::fillHoles(I_fill);
//! [Fill holes]
display3->init(I_fill, 0, I.getHeight() + 80, "Fill holes");
//! [Opening]
vpImage<unsigned char> I_open = I_fill;
vpImageMorphology::erosion<unsigned char>(I_open, vpImageMorphology::CONNEXITY_4);
vpImageMorphology::dilatation<unsigned char>(I_open, vpImageMorphology::CONNEXITY_4);
//! [Opening]
//! [Closing]
vpImage<unsigned char> I_close = I_open;
vpImageMorphology::dilatation<unsigned char>(I_close, vpImageMorphology::CONNEXITY_4);
vpImageMorphology::erosion<unsigned char>(I_close, vpImageMorphology::CONNEXITY_4);
//! [Closing]
display4->init(I_close, I.getWidth(), I.getHeight() + 80, "Closing");
//! [Find contours]
vpImage<unsigned char> I_contours(I_close.getHeight(), I_close.getWidth());
for (unsigned int cpt = 0; cpt < I_close.getSize(); cpt++)
I_contours.bitmap[cpt] = I_close.bitmap[cpt] ? 1 : 0;
VISP_NAMESPACE_NAME::vpContour vp_contours;
std::vector<std::vector<vpImagePoint> > contours;
VISP_NAMESPACE_NAME::findContours(I_contours, vp_contours, contours, VISP_NAMESPACE_NAME::CONTOUR_RETR_EXTERNAL);
//! [Find contours]
//! [Draw contours]
vpImage<vpRGBa> I_draw_contours(I_contours.getHeight(), I_contours.getWidth(), vpRGBa());
VISP_NAMESPACE_NAME::drawContours(I_draw_contours, contours, vpColor::red);
//! [Draw contours]
display5->init(I_draw_contours, 0, 2 * I.getHeight() + 80, "Contours");
vpDisplay::display(I);
vpDisplay::display(I_bin);
vpDisplay::display(I_fill);
vpDisplay::display(I_close);
vpDisplay::display(I_draw_contours);
//! [Count coins]
int nb_coins = 0;
for (size_t i = 0; i < contours.size(); i++) {
std::vector<vpPoint> vec_p;
for (size_t j = 0; j < contours[i].size(); j++) {
vpPoint pt;
pt.set_x(contours[i][j].get_u());
pt.set_y(contours[i][j].get_v());
vec_p.push_back(pt);
}
vpMomentObject obj(1);
obj.setType(vpMomentObject::DENSE_POLYGON);
obj.fromVector(vec_p);
// sign(m00) depends of the contour orientation (clockwise or
// counter-clockwise) that's why we use fabs
if (std::fabs(obj.get(0, 0)) >= I.getSize() / 200) {
nb_coins++;
std::stringstream ss;
ss << "Coin " << nb_coins;
int centroid_x = static_cast<int>(std::fabs(obj.get(1, 0) / obj.get(0, 0)));
int centroid_y = static_cast<int>(std::fabs(obj.get(0, 1) / obj.get(0, 0)));
vpDisplay::displayText(I_draw_contours, centroid_y, centroid_x - 20, ss.str(), vpColor::red);
}
}
//! [Count coins]
vpDisplay::displayText(I_draw_contours, 20, 20, "Click to quit.", vpColor::red);
vpDisplay::flush(I);
vpDisplay::flush(I_bin);
vpDisplay::flush(I_fill);
vpDisplay::flush(I_close);
vpDisplay::flush(I_draw_contours);
vpDisplay::getClick(I_draw_contours);
#if (VISP_CXX_STANDARD < VISP_CXX_STANDARD_11) && defined(VISP_HAVE_DISPLAY)
if (display != nullptr) {
delete display;
}
if (display2 != nullptr) {
delete display2;
}
if (display3 != nullptr) {
delete display3;
}
if (display4 != nullptr) {
delete display4;
}
if (display5 != nullptr) {
delete display5;
}
#endif
#else
(void)argc;
(void)argv;
#endif
return EXIT_SUCCESS;
}
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