/// <summary>
/// Create a norm based cost extraction.
/// </summary>
/// <param name="flag">Distance type</param>
/// <param name="nDummies">Number of dummies</param>
/// <param name="defaultCost">Default cost</param>
public NormHistogramCostExtractor(CvEnum.DistType flag = CvEnum.DistType.L2, int nDummies = 25, float defaultCost = 0.2f)
{
_ptr = ShapeInvoke.cvNormHistogramCostExtractorCreate(flag, nDummies, defaultCost, ref _sharedPtr);
}