public static IEnumerable <ColorBox> Quantize(Color[] pixels, int maxColors)
{
if (pixels.Length == 0)
{
throw new ArgumentException("Pixel array is empty");
}
if (maxColors < 2 || maxColors > 256)
{
throw new ArgumentOutOfRangeException("Argument maxColors should be at least 2 and maximally 256");
}
var histogram = GetHistogram(pixels);
var colorBox = ColorBox.Create(pixels, histogram);
var queue = new PriorityQueue((a, b) => a.GetCount().CompareTo(b.GetCount()));
queue.Push(colorBox);
Iter(queue, _fractByPopulations * maxColors, histogram);
var queue2 = new PriorityQueue((a, b) => (a.GetCount() * a.GetVolume()).CompareTo(b.GetCount() * b.GetVolume()));
while (queue.Count > 0)
{
queue2.Push(queue.Pop());
}
Iter(queue2, maxColors - queue2.Count, histogram);
var boxes = new List <ColorBox>();
while (queue2.Count > 0)
{
boxes.Add(queue2.Pop());
}
return(boxes);
}
