//TODO : Needs some work, like R,G,B weighting as opposed to a stright-up-the-middle, first stab
public static Dictionary <string, Color> PaletteReducer(Dictionary <string, Color> original, int paletteCount)
{
if (original.Keys.Count < paletteCount)
{
return(original);
}
Dictionary <string, Color> reducedPalette = new Dictionary <string, Color>();
// Divide the RBG space into paletteCount as a line through the middle of the space and find nearest neighbour to the that line.
// When the nearest color is found, it must be removed from the list of eligible colors.
int units = 255 / paletteCount;
for (int i = 0; i < paletteCount; i++)
{
// Straight up the middle of the 3D color space
Color testColor = Color.FromArgb(255, units * i, units * 1, units * i);
ColorTuple t = testColor.ClosestColor(original);
reducedPalette.Add(t.Name, t.ColorValue);
original.Remove(t.Name);
}
return(reducedPalette);
}
public static ColorTuple ClosestColor(this Color original, Dictionary <string, Color> palette)
{
// Middle of the color range yields significantly better results as a default.
ColorTuple closest = new ColorTuple("Blank", Color.FromArgb(255, 128, 128, 128));
foreach (string key in palette.Keys)
{
if (palette[key].ColorDiff(original) <= closest.ColorValue.ColorDiff(original))
{
closest.Name = key;
closest.ColorValue = palette[key];
}
}
return(closest);
}