/// <summary>
/// Add each color in a row to the histogram and register them to the quantizer
/// </summary>
/// <param name="totalWidth">the width of the row</param>
/// <param name="line">the row</param>
/// <param name="colorCount">the histogram to which we will add</param>
private void AddRow(int totalWidth, int[] line, ConcurrentDictionary <Color, int> colorCount)
{
for (int width = 0; width < totalWidth; width++)
{
Color color = Color.FromArgb(line[width]);
quantizer.AddColor(color);
colorCount.AddOrUpdate(color, 1, (c, count) => count + 1);
}
}