private static XyzColor LabToXyz(LabColor color)
{
// Convert from LAB to XYZ.
// Algorithm from https://www.easyrgb.com/en/math.php
double y = (color.L + 16) / 116.0;
double x = (color.A / 500.0) + y;
double z = y - color.B / 200.0f;
x = Math.Pow(x, 3) > 0.008856 ? Math.Pow(x, 3) : (x - 16 / 116.0) / 7.787;
y = Math.Pow(y, 3) > 0.008856 ? Math.Pow(y, 3) : (y - 16 / 116.0) / 7.787;
z = Math.Pow(z, 3) > 0.008856 ? Math.Pow(z, 3) : (z - 16 / 116.0) / 7.787;
x *= 0.95047;
y *= 1.00000;
z *= 1.08883;
return(new XyzColor(x, y, z));
}
public double GetDistance(Color first, Color second, bool normalize)
{
// Algorithm from https://www.easyrgb.com/en/math.php
LabColor labFirst = first.ToLab();
LabColor labSecond = second.ToLab();
double deltaE = Math.Sqrt(
Math.Pow(labFirst.L - labSecond.L, 2) +
Math.Pow(labFirst.A - labSecond.A, 2) +
Math.Pow(labFirst.B - labSecond.B, 2));
if (normalize)
{
return(Math.Min(deltaE / 100.0, 1.0));
}
else
{
return(deltaE);
}
}