// Distance between two colors in Y'UV plane
public static double DistanceTo(this YUVColor color1, YUVColor color2)
{
var o1 = Math.Pow (color1.U - color2.U, 2);
var o2 = Math.Pow (color1.V - color2.V, 2);
return Math.Sqrt (o1 + o2);
}
// Distance between two colors in Y'UV plane
public static double DistanceTo(this YUVColor color1, YUVColor color2)
{
var o1 = Math.Pow(color1.U - color2.U, 2);
var o2 = Math.Pow(color1.V - color2.V, 2);
return(Math.Sqrt(o1 + o2));
}
public static int IndexOfItemWithColorFromRange(this List <PixelColor> list, YUVColor color, double range)
{
for (int i = 0; i < list.Count; i++)
{
if (list[i].Color.DistanceTo(color) <= range)
{
// In range!
return(i);
}
}
return(-1);
}
// Darkens color by specified distance
public static YUVColor DarkenByDistane(this YUVColor color, float distance)
{
YUVColor result = (YUVColor)color.Clone();
result.Y -= distance;
if (result.Y < 0)
{
// Y value can't be < 0
result.Y = 0.15f;
}
return(result);
}
// Lighttens color by specified distance
public static YUVColor LighttenByDistane(this YUVColor color, float distance)
{
YUVColor result = (YUVColor)color.Clone();
result.Y += distance;
if (result.Y > 1)
{
// Y value can't be > 1
result.Y = 0.85f;
}
return(result);
}
// Returns color that is at specified distance from specified color in Y'UV plane
public static YUVColor ColorAtDistanceFrom(this YUVColor color, YUVColor referenceColor, float distance)
{
YUVColor result = new YUVColor() {Y = color.Y, U = color.U, V = color.V};
if(color.Y > referenceColor.Y)
{
// Need to increase color.Y value
result.Y = referenceColor.Y + distance;
}
else
{
// Need to decrease color.Y value
result.Y = referenceColor.Y - distance;
}
return result;
}
// Returns color that is at specified distance from specified color in Y'UV plane
public static YUVColor ColorAtDistanceFrom(this YUVColor color, YUVColor referenceColor, float distance)
{
YUVColor result = new YUVColor()
{
Y = color.Y, U = color.U, V = color.V
};
if (color.Y > referenceColor.Y)
{
// Need to increase color.Y value
result.Y = referenceColor.Y + distance;
}
else
{
// Need to decrease color.Y value
result.Y = referenceColor.Y - distance;
}
return(result);
}