//default 8-pallete
public static Bitmap BurkesColorDithering(Bitmap sourceImage, int paletteSize)
{
ColorImageQuantizer ciq = new ColorImageQuantizer(new MedianCutQuantizer());
Color[] colorTable = ciq.CalculatePalette(sourceImage, paletteSize);
BurkesColorDithering filter = new BurkesColorDithering();
filter.ColorTable = colorTable;
return(filter.Apply(sourceImage));
}
public static Bitmap BurkesColorDithering(Bitmap bmp, int value)
{
// create color image quantization routine
ColorImageQuantizer ciq = new ColorImageQuantizer(new MedianCutQuantizer());
// create 8 colors table
Color[] colorTable = ciq.CalculatePalette(bmp, value);
// create dithering routine
BurkesColorDithering dithering = new BurkesColorDithering();
dithering.ColorTable = colorTable;
// apply the dithering routine
Bitmap newImage = dithering.Apply(bmp);
return(newImage);
}
public Bitmap Convert(Bitmap source, Size size)
{
if (source == null)
{
return(null);
}
Bitmap result = source.Clone(System.Drawing.Imaging.PixelFormat.Format24bppRgb);
if (result.Size != size)
{
if (size.Width >= result.Width && size.Height >= result.Height)
{
size = result.Size; // no change
}
else
{
var ratioWidth = (double)size.Width / result.Width;
var ratioHeight = (double)size.Height / result.Height;
var ratio = Math.Min(ratioWidth, ratioHeight);
size = new Size((int)(result.Width * ratio), (int)(result.Height * ratio));
ResizeBicubic filter = new ResizeBicubic(size.Width, size.Height);
result = filter.Apply(result);
}
}
ColorImageQuantizer colorImageQuantizer = new ColorImageQuantizer(new MedianCutQuantizer());
BurkesColorDithering dither = new BurkesColorDithering
{
ColorTable = palette
};
result = dither.Apply(result);
return(result);
}