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// Standard headers
#include <iostream>
// VCG headers
#include <vcg/space/color4.h>
#include <vcg/space/colorspace.h>
using namespace std;
typedef vcg::ColorSpace<double> ColorSpace;
int main(int argc,char ** argv)
{
// Some Color Space processing examples
cout << endl;
if (argc != 4)
{
cout << " Usage: colorspace <r> <g> <b>" << endl << endl;
cout << " <r> <g> <b> : RGB triplet (0-255)" << endl << endl;
cout << " Note: The RGB triplet is assumed in the sRGB space (D65 illuminant).";
cout << endl << endl;
exit(-2);
}
double r = static_cast<double>(atof(argv[1]));
double g = static_cast<double>(atof(argv[2]));
double b = static_cast<double>(atof(argv[3]));
// RGB components have to be in the range [0.0, 1.0]
vcg::Color4<double> color(r/255.0, g/255.0, b/255.0, 0.0);
// RGB --> RGB (RGB space changing)
///////////////////////////////////////////////
cout << " * RGB --> RGB conversion" << endl << endl;
vcg::Color4<double> rgb = ColorSpace::RGBtoRGB(color, ColorSpace::SRGB, ColorSpace::PAL_RGB);
rgb *= 255.0;
cout << " RGB (PAL/SECAM): " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl;
rgb = ColorSpace::RGBtoRGB(color, ColorSpace::SRGB, ColorSpace::WIDE_GAMUT);
rgb *= 255.0;
cout << " RGB (Wide Gamut): " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl << endl;
// RGB <--> HSL (Hue, Saturation, Lightness)
///////////////////////////////////////////////
cout << " * RGB <--> HSL conversion" << endl << endl;
vcg::Color4<double> hsl = ColorSpace::RGBtoHSL(color);
cout << " RGB --> HSL: " << hsl[0]*360.0 << " " << hsl[1]*100.0 << "% " << hsl[2]*100.0 << "% " << endl;
rgb = ColorSpace::HSLtoRGB(hsl);
rgb *= 255.0;
cout << " HSL --> RGB: " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl << endl;
// RGB <--> HSV (Hue, Saturation, Value)
///////////////////////////////////////////////
cout << " * RGB <--> HSV conversion" << endl << endl;
vcg::Color4<double> hsv = ColorSpace::RGBtoHSV(color);
cout << " RGB --> HSV: " << hsv[0]*360.0 << " " << hsv[1]*100.0 << "% " << hsv[2]*100.0 << "% " << endl;
rgb = ColorSpace::HSVtoRGB(hsv);
rgb *= 255.0;
cout << " HSV --> RGB: " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl << endl;
// RGB --> CIELab
///////////////////////////////////////////////
cout << " * RGB <--> Lab conversion" << endl << endl;
vcg::Color4<double> xyzD65 = ColorSpace::RGBtoXYZ(color, ColorSpace::SRGB, ColorSpace::ILLUMINANT_D65);
vcg::Color4<double> lab = ColorSpace::XYZtoCIELab(xyzD65, ColorSpace::refIlluminant(ColorSpace::SRGB));
cout << " RGB --> CIELab: " << lab[0] << " " << lab[1] << " " << lab[2] << endl;
vcg::Color4<double> xyz = ColorSpace::CIELabtoXYZ(lab, ColorSpace::refIlluminant(ColorSpace::SRGB));
rgb = ColorSpace::XYZtoRGB(xyz, ColorSpace::refIlluminant(ColorSpace::SRGB), ColorSpace::SRGB);
rgb *= 255.0;
cout << " CIELab --> RGB: " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl << endl;
// RGB <--> XYZ
///////////////////////////////////////////////
cout << " * RGB <--> XYZ conversion" << endl << endl;
// RGB --> XYZ (D65)
cout << " RGB --> XYZ (D65): " << xyzD65[0] << " " << xyzD65[1] << " " << xyzD65[2] << endl;
// XYZ (D65) --> RGB
rgb = ColorSpace::XYZtoRGB(xyzD65, ColorSpace::ILLUMINANT_D65, ColorSpace::SRGB);
rgb *= 255.0;
cout << " XYZ (D65) --> RGB: " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl;
// RGB --> XYZ (D50)
vcg::Color4<double> xyzD50 = ColorSpace::RGBtoXYZ(color, ColorSpace::SRGB, ColorSpace::ILLUMINANT_D50);
cout << " RGB --> XYZ (D50): " << xyzD50[0] << " " << xyzD50[1] << " " << xyzD50[2] << endl;
// XYZ (D50) --> RGB
rgb = ColorSpace::XYZtoRGB(xyzD50, ColorSpace::ILLUMINANT_D50, ColorSpace::SRGB);
rgb *= 255.0;
cout << " XYZ (D50) --> RGB: " << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl;
// Direct way
xyz = ColorSpace::chromaticAdaptation(xyzD65, ColorSpace::ILLUMINANT_D65, ColorSpace::ILLUMINANT_D50);
cout << " XYZ (D65 --> D50): " << xyz[0] << " " << xyz[1] << " " << xyz[2] << endl << endl;
return 0;
}
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