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WPF Color Picker Construction Kit

, 26 Dec 2010 CPOL
A WPF color picker (like Adobe's) constructed in a modular fashion for easy modification.
ColorPickerDemo.zip
ColorPicker.dll
ColorPickerControls.dll
ColorPickerDemo.exe
ColorPickerSource.zip
ColorPickerDemo
ColorPicker
ColorModels
CMY
CMYK
HSB
Lab
RGB
ExtensionMethods
Properties
Settings.settings
Resources
ColorPickerControls
Chips
Dialogs
Pickers
Properties
Settings.settings
ColorPickerDemo
ColorPickerDemo.ico
Properties
Settings.settings
using System;
using System.Windows.Media;

namespace ColorPicker.ColorModels.Lab
{
	class LabModel
	{
		private const double D65X = 0.9505;
		 private const double D65Y =1.0;
		 private const double D65Z = 1.0890;

		public Color Color (double l, double a , double b)
		{
			double theta = 6.0/29.0;

			double fy = (l+16)/116.0;
			double fx = fy + (a/500.0);
			double fz = fy - (b/200.0);

			var x = (fx > theta) ? D65X*(fx*fx*fx) : (fx - 16.0/116.0)*3*(theta*theta)*D65X;
			var y = (fy > theta) ? D65Y*(fy*fy*fy) : (fy - 16.0/116.0)*3*(theta*theta)*D65Y;
			var z =	(fz > theta)?D65Z * (fz*fz*fz) : (fz - 16.0/116.0)*3*(theta*theta)*D65Z;

            x = (x > 0.9505) ? 0.9505 : ((x < 0) ? 0 : x);
            y = (y > 1.0) ? 1.0 : ((y < 0) ? 0 : y);
            z = (z > 1.089) ? 1.089 : ((z < 0) ? 0 : z);

			double[] Clinear = new double[3];
			Clinear[0] = x*3.2410 - y*1.5374 - z*0.4986; // red
			Clinear[1] = -x*0.9692 + y*1.8760 - z*0.0416; // green
			Clinear[2] = x*0.0556 - y*0.2040 + z*1.0570; // blue

			for(int i=0; i<3; i++)
			{
				Clinear[i] = (Clinear[i]<=0.0031308)? 12.92*Clinear[i] : (1+0.055)* Math.Pow(Clinear[i], (1.0/2.4)) - 0.055;
				Clinear[i] = Math.Min(Clinear[i], 1);
				Clinear[i] = Math.Max(Clinear[i], 0);
			}

			return System.Windows.Media.Color.FromRgb(
				Convert.ToByte(Clinear[0]*255.0),
				Convert.ToByte(Clinear[1]*255.0),
				Convert.ToByte(Clinear[2]*255.0));
				

			 
		}
		public double LComponent(Color color)
		{
			// normalize red, green, blue values
			double rLinear = color.R / 255.0;
			double gLinear = color.G / 255.0;
			double bLinear = color.B / 255.0;

			double r = (rLinear > 0.04045) ? Math.Pow((rLinear + 0.055) / (1 + 0.055), 2.2) : (rLinear / 12.92);
			double g = (gLinear > 0.04045) ? Math.Pow((gLinear + 0.055) / (1 + 0.055), 2.2) : (gLinear / 12.92);
			double b = (bLinear > 0.04045) ? Math.Pow((bLinear + 0.055) / (1 + 0.055), 2.2) : (bLinear / 12.92);

		 
			double CIEY = r * 0.2126 + g * 0.7152 + b * 0.0722;
			 

			double l = 116.0 * Fxyz(CIEY / D65Y) - 16;
			return l;
		}

		public double AComponent(Color color)
		{
			double rLinear = color.R / 255.0;
			double gLinear = color.G / 255.0;
			double bLinear = color.B / 255.0;

			double r = (rLinear > 0.04045) ? Math.Pow((rLinear + 0.055) / (1 + 0.055), 2.2) : (rLinear / 12.92);
			double g = (gLinear > 0.04045) ? Math.Pow((gLinear + 0.055) / (1 + 0.055), 2.2) : (gLinear / 12.92);
			double b = (bLinear > 0.04045) ? Math.Pow((bLinear + 0.055) / (1 + 0.055), 2.2) : (bLinear / 12.92);

			double CIEX = r * 0.4124 + g * 0.3576 + b * 0.1805;
			double CIEY = r * 0.2126 + g * 0.7152 + b * 0.0722;
		 


			double a = 500.0 * (Fxyz(CIEX / D65X) - Fxyz(CIEY / D65Y));
			return a;
		}
			
		
		public double BComponent(Color color)
		{
			double rLinear = color.R / 255.0;
			double gLinear = color.G / 255.0;
			double bLinear = color.B / 255.0;

			double r = (rLinear > 0.04045) ? Math.Pow((rLinear + 0.055) / (1 + 0.055), 2.2) : (rLinear / 12.92);
			double g = (gLinear > 0.04045) ? Math.Pow((gLinear + 0.055) / (1 + 0.055), 2.2) : (gLinear / 12.92);
			double b = (bLinear > 0.04045) ? Math.Pow((bLinear + 0.055) / (1 + 0.055), 2.2) : (bLinear / 12.92);

		
			double CIEY = r * 0.2126 + g * 0.7152 + b * 0.0722;
			double CIEZ = r * 0.0193 + g * 0.1192 + b * 0.9505;


			return  200.0 * (Fxyz(CIEY / D65Y) - Fxyz(CIEZ / D65Z));
			 
		}
		 
		private static double Fxyz(double t)
		{

			return ((t > 0.008856)? Math.Pow(t, (1.0/3.0)) : (7.787*t + 16.0/116.0));
		}
		 
	}
}

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About the Author

KenJohnson
Software Developer (Senior)
United States United States
Written software for what seems like forever. I'm currenly infatuated with WPF. Hopefully my affections are returned.

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