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/*! \example tutorial-image-colormap.cpp */
#include <map>
#include <visp3/core/vpColormap.h>
#include <visp3/core/vpFont.h>
#include <visp3/core/vpImageTools.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/io/vpImageIo.h>
int main()
{
#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
try {
std::map<vpColormap::vpColormapType, std::string> colormaps_str = {
{vpColormap::COLORMAP_AUTUMN, "Colormap Autumn"},
{vpColormap::COLORMAP_CIVIDIS, "Colormap Cividis"},
{vpColormap::COLORMAP_COOL, "Colormap Cool"},
{vpColormap::COLORMAP_GIST_EARTH, "Colormap Gist Earth"},
{vpColormap::COLORMAP_GNUPLOT, "Colormap Gnuplot"},
{vpColormap::COLORMAP_GNUPLOT2, "Colormap Gnuplot2"},
{vpColormap::COLORMAP_HOT, "Colormap Hot"},
{vpColormap::COLORMAP_HSV, "Colormap HSV"},
{vpColormap::COLORMAP_INFERNO, "Colormap Inferno"},
{vpColormap::COLORMAP_JET, "Colormap Jet"},
{vpColormap::COLORMAP_MAGMA, "Colormap Magma"},
{vpColormap::COLORMAP_OCEAN, "Colormap Ocean"},
{vpColormap::COLORMAP_PLASMA, "Colormap Plasma"},
{vpColormap::COLORMAP_RAINBOW, "Colormap Rainbow"},
{vpColormap::COLORMAP_SPRING, "Colormap Spring"},
{vpColormap::COLORMAP_SUMMER, "Colormap Summer"},
{vpColormap::COLORMAP_TERRAIN, "Colormap Terrain"},
{vpColormap::COLORMAP_TURBO, "Colormap Turbo"},
{vpColormap::COLORMAP_TWILIGHT, "Colormap Twilight"},
{vpColormap::COLORMAP_TWILIGHT_SHIFTED, "Colormap Twilight Shifted"},
{vpColormap::COLORMAP_VIRIDIS, "Colormap Viridis"},
{vpColormap::COLORMAP_WINTER, "Colormap Winter"}
};
std::vector<vpColormap::vpColormapType> colormaps = {
vpColormap::COLORMAP_AUTUMN, vpColormap::COLORMAP_CIVIDIS,
vpColormap::COLORMAP_COOL, vpColormap::COLORMAP_GIST_EARTH,
vpColormap::COLORMAP_GNUPLOT, vpColormap::COLORMAP_GNUPLOT2,
vpColormap::COLORMAP_HOT, vpColormap::COLORMAP_HSV,
vpColormap::COLORMAP_INFERNO, vpColormap::COLORMAP_JET,
vpColormap::COLORMAP_MAGMA, vpColormap::COLORMAP_OCEAN,
vpColormap::COLORMAP_PLASMA, vpColormap::COLORMAP_RAINBOW,
vpColormap::COLORMAP_SPRING, vpColormap::COLORMAP_SUMMER,
vpColormap::COLORMAP_TERRAIN, vpColormap::COLORMAP_TURBO,
vpColormap::COLORMAP_TWILIGHT, vpColormap::COLORMAP_TWILIGHT_SHIFTED,
vpColormap::COLORMAP_VIRIDIS, vpColormap::COLORMAP_WINTER
};
// Apply a colormap on a 3-channel floating-point image
{
vpImage<vpRGBf> Irgbf;
vpImageIo::readPFM_HDR(Irgbf, "memorial.pfm");
vpImage<vpRGBa> Icolor(Irgbf.getHeight(), Irgbf.getWidth());
vpImage<vpRGBa> Icolor2(Irgbf.getHeight() * 2, Irgbf.getWidth() * 2);
#if defined(VISP_HAVE_X11)
vpDisplayX d(Icolor2, 10, 10, "Memorial");
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI d(Icolor2, 10, 10, "Memorial");
#elif defined(HAVE_OPENCV_HIGHGUI)
vpDisplayOpenCV d(Icolor2, 10, 10, "Memorial");
#else
std::cout << "No image viewer is available..." << std::endl;
return EXIT_SUCCESS;
#endif
vpFont font(20);
for (size_t i = 0; i < colormaps.size(); i++) {
vpColormap colormap(colormaps[i]);
colormap.convert(Irgbf, Icolor);
vpImageTools::resize(Icolor, Icolor2, vpImageTools::INTERPOLATION_LINEAR);
font.drawText(Icolor2, colormaps_str[colormaps[i]], vpImagePoint(20, 20), vpColor::black, vpColor::white);
vpDisplay::display(Icolor2);
vpDisplay::flush(Icolor2);
vpDisplay::getClick(Icolor2);
}
}
// Apply a colormap on a 8-bit RGB image
{
vpImage<vpRGBa> I;
vpImageIo::read(I, "monkey.png");
vpImage<vpRGBa> Icolor(I.getHeight(), I.getWidth());
vpImage<vpRGBa> Icolor2(I.getHeight() * 2, I.getWidth() * 2);
#if defined(VISP_HAVE_X11)
vpDisplayX d(Icolor2, 10, 10, "Monkey");
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI d(Icolor2, 10, 10, "Monkey");
#elif defined(HAVE_OPENCV_HIGHGUI)
vpDisplayOpenCV d(Icolor2, 10, 10, "Monkey");
#else
std::cout << "No image viewer is available..." << std::endl;
return EXIT_SUCCESS;
#endif
vpFont font(20);
for (size_t i = 0; i < colormaps.size(); i++) {
vpColormap colormap(colormaps[i]);
colormap.convert(I, Icolor);
vpImageTools::resize(Icolor, Icolor2, vpImageTools::INTERPOLATION_LINEAR);
font.drawText(Icolor2, colormaps_str[colormaps[i]], vpImagePoint(20, 20), vpColor::black, vpColor::white);
vpDisplay::display(Icolor2);
vpDisplay::flush(Icolor2);
vpDisplay::getClick(Icolor2);
}
}
// Apply a colormap on a 8-bit RGB image, with normalisation to the [0 - 255] range
{
vpImage<vpRGBa> I;
vpImageIo::read(I, "monkey.png");
vpImage<vpRGBa> Icolor(I.getHeight(), I.getWidth());
vpImage<vpRGBa> Icolor2(I.getHeight() * 2, I.getWidth() * 2);
#if defined(VISP_HAVE_X11)
vpDisplayX d(Icolor2, 10, 10, "Monkey");
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI d(Icolor2, 10, 10, "Monkey");
#elif defined(HAVE_OPENCV_HIGHGUI)
vpDisplayOpenCV d(Icolor2, 10, 10, "Monkey");
#else
std::cout << "No image viewer is available..." << std::endl;
return EXIT_SUCCESS;
#endif
vpFont font(20);
for (size_t i = 0; i < colormaps.size(); i++) {
vpColormap colormap(colormaps[i]);
const bool normalise = true;
colormap.convert(I, Icolor, normalise);
vpImageTools::resize(Icolor, Icolor2, vpImageTools::INTERPOLATION_LINEAR);
font.drawText(Icolor2, colormaps_str[colormaps[i]], vpImagePoint(20, 20), vpColor::black, vpColor::white);
vpDisplay::display(Icolor2);
vpDisplay::flush(Icolor2);
vpDisplay::getClick(Icolor2);
}
}
} catch (const vpException &e) {
std::cerr << "Catch an exception: " << e << std::endl;
}
#else
std::cout << "This tutorial needs at least cxx11 standard." << std::endl;
#endif
return EXIT_SUCCESS;
}
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