public static HueSaturationValue ColorToHSV(Color color)
{
HueSaturationValue hsv = new HueSaturationValue();
float min, max, delta;
float r = (float)color.R / 255.0f;
float g = (float)color.G / 255.0f;
float b = (float)color.B / 255.0f;
min = Math.Min(r, g);
min = Math.Min(min, b);
max = Math.Max(r, g);
max = Math.Max(max, b);
hsv.V = max; // v
delta = max - min;
if (max != 0)
{
hsv.S = delta / max; // s
}
else
{
// r = g = b = 0 // s = 0, v is undefined
hsv.S = 0;
hsv.H = -1;
return(hsv);
}
if (r == max)
{
hsv.H = (g - b) / delta; // between yellow & magenta
}
else if (g == max)
{
hsv.H = 2 + (b - r) / delta; // between cyan & yellow
}
else
{
hsv.H = 4 + (r - g) / delta; // between magenta & cyan
}
hsv.H *= 60; // degrees
if (hsv.H < 0)
{
hsv.H += 360;
}
return(hsv);
}
public static Color HSVToColor(HueSaturationValue hsv)
{
if (hsv.H == 0 && hsv.S == 0)
{
return(new Color(hsv.V, hsv.V, hsv.V));
}
float c = hsv.S * hsv.V;
float x = c * (1 - Math.Abs(hsv.H % 2 - 1));
float m = hsv.V - c;
if (hsv.H < 1)
{
return(new Color(c + m, x + m, m));
}
else if (hsv.H < 2)
{
return(new Color(x + m, c + m, m));
}
else if (hsv.H < 3)
{
return(new Color(m, c + m, x + m));
}
else if (hsv.H < 4)
{
return(new Color(m, x + m, c + m));
}
else if (hsv.H < 5)
{
return(new Color(x + m, m, c + m));
}
else
{
return(new Color(c + m, m, x + m));
}
}
