public override ColorBgra Apply(ColorBgra color)
{
byte value = (byte)(Math.Abs(color.GetBrightness() - FilterColor.GetBrightness()) * 255);
if (Grayscale)
{
if (!Invert)
{
value = (byte)(255 - value);
}
return(ColorBgra.FromBgr(value, value, value));
}
return(value < Tolerance ? TransparentColor : OpaqueColor);
}