public LChuv Convert(Luv input)
{
double L = input.L, u = input.u, v = input.v;
var C = Math.Sqrt(u * u + v * v);
var hRadians = Math.Atan2(v, u);
var hDegrees = Angle.NormalizeDegree(Angle.GetDegree(hRadians));
return(new LChuv(L, C, hDegrees, input.Illuminant));
}
public void SilverLuvToMunsell()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Munsell("N7.5");
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToHex()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Hex("c0c0c0");
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToHsb()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Hsb {
H = 60, S = 0.7874, B = 75.098,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToCmyk()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Cmyk {
C = .0000148, M = .000, Y = .0000186, K = .24704,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void WhiteRgbToLuv()
{
var knownColor = new Rgb {
R = 255, G = 255, B = 255,
};
var expectedColor = new Luv {
L = 100, U = .00089, V = -.017,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToLab()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Lab {
L = 77.704, A = .0026, B = -.00696,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToLch()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Lch {
L = 77.704, C = .0074, H = 290.49463,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToHsl()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Hsl {
H = 108, S = 0.02, L = 75.098,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SteelBlueCmyToLuv()
{
var knownColor = new Cmy {
C = .72549, M = .49020, Y = .29412,
};
var expectedColor = new Luv {
L = 52.467, U = -25.107, V = -48.374,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void BlackRgbToLuv()
{
var knownColor = new Rgb {
R = 0, G = 0, B = 0,
};
var expectedColor = new Luv {
L = 0, U = 0, V = 0,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void GoldenrodRgbToLuv()
{
var knownColor = new Rgb {
R = 218, G = 165, B = 32,
};
var expectedColor = new Luv {
L = 70.816, U = 44.368, V = 69.994,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void AquamarineHsvToLuv()
{
var knownColor = new Hsv {
H = 160, S = .5, V = 1,
};
var expectedColor = new Luv {
L = 92.036, U = -55.917, V = 21.99756,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToYxy()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Yxy {
Y1 = 52.711, X = .31272, Y2 = .32900,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToXyz()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Xyz {
X = 50.102, Y = 52.711, Z = 57.402,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public void SilverLuvToRgb()
{
var knownColor = new Luv {
L = 77.704, U = .001, V = -.013,
};
var expectedColor = new Rgb {
R = 192, G = 192, B = 192,
};
ExpectedValuesForKnownColor(knownColor, expectedColor);
}
public XYZ Convert(Luv input)
{
double L = input.L, u = input.u, v = input.v;
var u0 = Compute_u0(input.Illuminant);
var v0 = Compute_v0(input.Illuminant);
var Y = L > (CIE.Kappa * CIE.Epsilon)
? ((L + 16) / 116).Power(3)
: (L / CIE.Kappa);
var a = ((52 * L) / (u + 13 * L * u0) - 1) / 3;
var b = -5 * Y;
var c = -1 / 3d;
var d = Y * ((39 * L) / (v + 13 * L * v0) - 5);
var X = (d - b) / (a - c);
var Z = X * a + b;
if (double.IsNaN(X) || X < 0)
{
X = 0;
}
if (double.IsNaN(Y) || Y < 0)
{
Y = 0;
}
if (double.IsNaN(Z) || Z < 0)
{
Z = 0;
}
var result = new XYZ(X, Y, Z);
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="Color"></param>
/// <returns></returns>
public override Point PointFromColor(Color Color)
{
var luv = new Luv(Color);
return(PointFromColor(luv.U.Divide(Luv.MaxValue.U), luv.L.Divide(Luv.MaxValue.L)));
}
