/// <summary>
/// <para>(Accord .NET internal call)</para>
/// The Variance filter replaces each pixel in an image by its
/// neighborhood variance. The end result can be regarded as an
/// border enhancement, making the Variance filter suitable to
/// be used as an edge detection mechanism.
/// </summary>
/// <param name="img">Image.</param>
/// <param name="radius">The radius neighborhood used to compute a pixel's local variance.</param>
/// <returns>Processed image.</returns>
public static Bgra <byte>[,] Variance(this Bgra <byte>[,] img, int radius = 2)
{
Variance v = new Variance(radius);
return(img.ApplyFilter(v));
}
/// <summary>
/// Applies White Patch filter for color normalization (Accord.NET function)
/// </summary>
/// <param name="img">image.</param>
/// <param name="inPlace">Apply in place or not. If it is set to true return value can be omitted.</param>
/// <returns>Processed image.</returns>
public static Bgra <byte>[,] WhitePatch(this Bgra <byte>[,] img, bool inPlace = true)
{
WhitePatch wp = new WhitePatch();
return(img.ApplyFilter(wp, inPlace));
}
/// <summary>
/// Gray World filter for color normalization.
/// <para>Accord.NET internal call.</para>
/// </summary>
/// <param name="img">Image.</param>
/// <param name="inPlace">Apply in place or not. If it is set to true return value can be omitted.</param>
/// <returns>Processed image.</returns>
public static Bgra <byte>[,] GrayWorld(this Bgra <byte>[,] img, bool inPlace = true)
{
GrayWorld gw = new GrayWorld();
return(img.ApplyFilter(gw, inPlace));
}
