From 33bd01e13e153c131682134c0ca5f0e34a38d932 Mon Sep 17 00:00:00 2001
From: maxcorsini <massimiliano.corsini@isti.cnr.it>
Date: Tue, 29 Aug 2006 12:58:31 +0000
Subject: [PATCH] First working version

---
 apps/sample/colorspace/colorspace.cpp | 120 ++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 apps/sample/colorspace/colorspace.cpp

diff --git a/apps/sample/colorspace/colorspace.cpp b/apps/sample/colorspace/colorspace.cpp
new file mode 100644
index 00000000..6d1bb29b
--- /dev/null
+++ b/apps/sample/colorspace/colorspace.cpp
@@ -0,0 +1,120 @@
+
+// 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;
+}
+