protected override void FromRgb(Rgb color)
{
var xyz = color.ToColorSpace<Xyz>();
var dividend = xyz.X + xyz.Y + xyz.Z;
Y1 = xyz.Y;
X = dividend.ApproximatelyEquals(0) ? 0 : xyz.X / dividend;
Y2 = dividend.ApproximatelyEquals(0) ? 0 : xyz.Y / dividend;
}
protected override void FromRgb(Rgb color)
{
var xyz = color.ToColorSpace<Xyz>();
var y = xyz.Y / Xyz.WhiteReference[1];
L = y > Xyz.Epsilon ? 116.0 * System.Math.Pow(y, 1.0 / 3.0) - 16.0 : Xyz.Kappa * y;
var targetDenominator = xyz.X + 15.0 * xyz.Y + 3.0 * xyz.Z;
var referenceDenominator = Xyz.WhiteReference[0] + 15.0 * Xyz.WhiteReference[1] + 3.0 * Xyz.WhiteReference[2];
var xTarget = targetDenominator.Equals(0)
? 0
: 4.0 * xyz.X / targetDenominator -
4.0 * Xyz.WhiteReference[0] / referenceDenominator;
var yTarget = targetDenominator.Equals(0)
? 0
: 9.0 * xyz.Y / targetDenominator -
9.0 * Xyz.WhiteReference[1] / referenceDenominator;
U = 13.0 * L * xTarget;
V = 13.0 * L * yTarget;
}
protected override void FromRgb(Rgb color)
{
var xyz = color.ToColorSpace<Xyz>();
var x = xyz.X / Xyz.WhiteReference[0];
var y = xyz.Y / Xyz.WhiteReference[1];
var z = xyz.Z / Xyz.WhiteReference[2];
x = x > Xyz.Epsilon ? CubicRoot(x) : (Xyz.Kappa * x + 16) / 116;
y = y > Xyz.Epsilon ? CubicRoot(y) : (Xyz.Kappa * y + 16) / 116;
z = z > Xyz.Epsilon ? CubicRoot(z) : (Xyz.Kappa * z + 16) / 116;
L = System.Math.Max(0, 116 * y - 16);
A = 500 * (x - y);
B = 200 * (y - z);
}
protected override void FromRgb(Rgb color)
{
var xyz = color.ToColorSpace<Xyz>();
L = 10.0 * System.Math.Sqrt(xyz.Y);
A = !xyz.Y.Equals(0) ? 17.5 * ((1.02 * xyz.X - xyz.Y) / System.Math.Sqrt(xyz.Y)) : 0;
B = !xyz.Y.Equals(0) ? 7.0 * ((xyz.Y - 0.847 * xyz.Z) / System.Math.Sqrt(xyz.Y)) : 0;
}
