/// <summary>
/// Rectification filter for projective transformation.
/// <para>Accord.NET internal call. Please see: <see cref="Accord.Imaging.Filters.Rectification"/> for details.</para>
/// </summary>
/// <param name="img">Image.</param>
/// <param name="homography">The homography matrix used to map a image passed to the filter to the overlay image.</param>
/// <param name="fillColor">The filling color used to fill blank spaces.</param>
/// <returns>Rectified image.</returns>
public static Gray <byte>[,] Rectification(this Gray <byte>[,] img, double[,] homography, Gray <byte> fillColor)
{
Rectification r = new Rectification(homography);
r.FillColor = fillColor.ToColor();
return(img.ApplyBaseTransformationFilter(r));
}