/// <summary>
/// Quantizes an image.
/// </summary>
/// <param name="image">Image to quantize.</param>
/// <param name="settings">Settings for quantization processes.</param>
/// <returns>Collection of indices and a palette.</returns>
public static (IEnumerable <int> indeces, IList <Color> palette) Quantize(Bitmap image,
QuantizationSettings settings)
=> Quantize(DecomposeImage(image), settings);
/// <inheritdoc cref="IIndexEncoding.Quantize(IEnumerable{Color},QuantizationSettings)"/>
public (IEnumerable <IndexData> indices, IList <Color> palette) Quantize(IEnumerable <Color> colors, QuantizationSettings settings)
{
if (settings.ColorModel == ColorModel.RGBA)
{
settings.ColorModel = ColorModel.RGB;
}
var colorList = colors.ToList();
var(indices, palette) = Kolors.Quantize(colorList, settings);
var alphaIndexData = indices.
Zip(colorList, (x, y) => new { index = x, alpha = y.A }).
Select(x => new AlphaIndexData(Convert.ChangeBitDepth(x.alpha, 8, _alphaDepth), x.index));
return(alphaIndexData, palette);
}
/// <inheritdoc cref="IIndexEncoding.Quantize(IEnumerable{Color},QuantizationSettings)"/>
public (IEnumerable <IndexData> indices, IList <Color> palette) Quantize(IEnumerable <Color> colors, QuantizationSettings settings)
{
var(indices, palette) = Kolors.Quantize(colors, settings);
return(indices.Select(x => new IndexData(x)), palette);
}
