/// <summary>
/// Convert from XYZ to CIE
/// </summary>
/// <param name="xyz">XYZ Color</param>
/// <returns></returns>
public static CIELabColor XYZToCIE_Lab(XYZColor xyz)
{
float var_X = xyz.x / 95.047f; // ref_X = 95.047 Observer= 2°, Illuminant= D65
float var_Y = xyz.y / 100.000f; // ref_Y = 100.000
float var_Z = xyz.z / 108.883f; // ref_Z = 108.883
if (var_X > 0.008856f)
{
var_X = (float)Math.Pow(var_X, (1 / 3f));
}
else
{
var_X = (7.787f * var_X) + (16f / 116f);
}
if (var_Y > 0.008856f)
{
var_Y = (float)Math.Pow(var_Y, (1 / 3f));
}
else
{
var_Y = (7.787f * var_Y) + (16f / 116f);
}
if (var_Z > 0.008856f)
{
var_Z = (float)Math.Pow(var_Z, (1 / 3f));
}
else
{
var_Z = (7.787f * var_Z) + (16f / 116f);
}
float L = (116f * var_Y) - 16f;
float a = 500f * (var_X - var_Y);
float b = 200f * (var_Y - var_Z);
return(new CIELabColor(L, a, b));
}
/// <summary>
/// Convert from RGB to CIE
/// </summary>
/// <param name="col">Set Color</param>
/// <returns></returns>
public static CIELabColor FromRGB(Color col)
{
XYZColor xyz = XYZColor.FromRGB(col);
return(ColorConverter.XYZToCIE_Lab(xyz));
}
/// <summary>
/// Convert From XYZ to CIE
/// </summary>
/// <param name="xyz">XYZ</param>
/// <returns></returns>
public static CIELabColor FromXYZ(XYZColor xyz)
{
return(ColorConverter.XYZToCIE_Lab(xyz));
}