quantize method
Implementation
@override
QuantizerResult quantize(List<int> pixels, int maxColors) {
final wu = QuantizerWu();
final wuResult = wu.quantize(pixels, maxColors);
final wuClusters = wuResult.colorToCount.keys.toList();
const wsmeans = QuantizerWsmeans();
return wsmeans.quantize(pixels, maxColors, startingClusters: wuClusters);
}