/// <summary>
/// Computes the center moments for the specified image.
/// </summary>
///
/// <param name="image">The image whose moments should be computed.</param>
/// <param name="area">The region of interest in the image to compute moments for.</param>
///
public override void Compute(float[,] image, Rectangle area)
{
RawMoments raw = new RawMoments(image, area, Order);
CentralMoments center = new CentralMoments(raw);
this.Compute(center);
}
/// <summary>
/// Computes the center moments from the specified raw moments.
/// </summary>
///
/// <param name="moments">The raw moments to use as base of calculations.</param>
///
public void Compute(RawMoments moments)
{
float x = moments.CenterX;
float y = moments.CenterY;
Mu00 = moments.M00;
Mu01 = Mu10 = 0;
Mu11 = moments.M11 - moments.M01 * x;
Mu20 = moments.M20 - moments.M10 * x;
Mu02 = moments.M02 - moments.M01 * y;
Mu21 = moments.M21 - 2 * x * moments.M11 - y * moments.M20 + 2 * x * x * moments.M01;
Mu12 = moments.M12 - 2 * y * moments.M11 - x * moments.M02 + 2 * y * y * moments.M10;
Mu30 = moments.M30 - 3 * x * moments.M20 + 2 * x * x * moments.M10;
Mu03 = moments.M03 - 3 * y * moments.M02 + 2 * y * y * moments.M01;
invM00 = moments.InvM00;
}
/// <summary>
/// Initializes a new instance of the <see cref="CentralMoments"/> class.
/// </summary>
///
/// <param name="moments">The raw moments to construct central moments.</param>
///
public CentralMoments(RawMoments moments)
: base(moments.Order)
{
Compute(moments);
}