freVectorSampleCharacteristicsCalculator.h

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/*=========================================================================

  Program:   F.R.E.E. - flexible registration evaluation engine
  Version:   v.1.0.0
  Date:      $Date: 2006/09/01 12:00:00 $
  Module:    $RCSfile: freVectorSampleCharacteristicsCalculator.h,v $
  Language:  C++



  Copyright (c) 2007 Ralf o Floca (Department of Medical Informatics,
  Institute for Medical Biometry and Informatics, University of Heidelberg,
  Germany). All rights reserved.
  See FREECopyright.txt or http://www.mi.med.uni-hd.de/free/copyright.htm
  for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef _freVectorSampleCharacteristicsCalculator_h
#define _freVectorSampleCharacteristicsCalculator_h

#include "itkVariableSizeMatrix.h" 

namespace FREE
{

template <class TVectorField>
class VectorSampleCharacteristicsCalculator
{
public:
  typedef VectorSampleCharacteristicsCalculator Self;
        typedef TVectorField VectorFieldType;
        typedef typename VectorFieldType::ValueType VectorType; 
        typedef itk::VariableSizeMatrix<typename VectorType::ComponentType> CovarianceMatrixType; 
        typedef itk::Array<typename VectorType::ComponentType> MeanType; 

        void Compute();

        void ComputeMean();

        void ComputeCovariance(const MeanType& mean);

        MeanType GetMean() const;

        MeanType GetVariance() const;

        CovarianceMatrixType GetCovariance() const;

        void SetVectorField(const VectorFieldType* pField);

        VectorSampleCharacteristicsCalculator();

private:
        typename VectorFieldType::ConstPointer m_smpImage;

        MeanType m_Mean;

        CovarianceMatrixType m_CovarianceMatrix;
        
        unsigned int m_iMatrixSize;
};

} // namespace free

#ifndef ITK_MANUAL_INSTANTIATION
#include "freVectorSampleCharacteristicsCalculator.txx"
#endif

#endif

---