/// <summary>
/// Analyzes the image and calculates the color distribution.
/// </summary>
/// <param name="hueSteps">The number of steps to use for the hue distribution. The granularity
/// of the hue distribution is <paramref name="hueSteps"/> divided by 360 degrees.
/// </param>
/// <param name="saturationSteps">The number of steps to use for the saturation distribution.</param>
/// <param name="valueSteps">The number of steps to use for the value distribution.</param>
/// <returns>An instance of <see cref="ColorDistribution"/>. The method
/// <see cref="ColorDistribution.GetHueDistribution"/> returns <paramref name="hueSteps"/> elements.</returns>
public ColorDistribution GetColorDistribution(int hueSteps, int saturationSteps, int valueSteps)
{
var distribution = new ColorDistribution(hueSteps, saturationSteps, valueSteps);
foreach (var hsv in hsvPixels)
distribution.AddPixel(hsv);
return distribution;
}
/// <summary>
/// Analyzes the image and calculates the color distribution.
/// </summary>
/// <param name="hueSteps">The number of steps to use for the hue distribution. The granularity
/// of the hue distribution is <paramref name="hueSteps"/> divided by 360 degrees.
/// </param>
/// <param name="saturationSteps">The number of steps to use for the saturation distribution.</param>
/// <param name="valueSteps">The number of steps to use for the value distribution.</param>
/// <param name="rect">The image region to process.</param>
/// <returns>An instance of <see cref="ColorDistribution"/>. The method
/// <see cref="ColorDistribution.GetHueDistribution"/> returns <paramref name="hueSteps"/> elements.</returns>
public ColorDistribution GetColorDistribution(int hueSteps, int saturationSteps, int valueSteps, Rectangle rect)
{
Contract.Requires(rect.Left >= 0 && rect.Left <= Bitmap.Width
&& rect.Right >= 0 && rect.Right <= Bitmap.Width
&& rect.Top >= 0 && rect.Top <= Bitmap.Height
&& rect.Bottom >= 0 && rect.Bottom <= Bitmap.Height);
var distribution = new ColorDistribution(hueSteps, saturationSteps, valueSteps);
for (var y = 0; y < rect.Height; y++)
{
var offset = Bitmap.Width * y + rect.Left;
for (var x = 0; x < rect.Width; x++)
distribution.AddPixel(this.hsvPixels[offset + x]);
}
return distribution;
}