itkCovarianceCalculator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkCovarianceCalculator.h,v $
  Language:  C++
  Date:      $Date: 2005/07/26 15:54:54 $
  Version:   $Revision: 1.13 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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 __itkCovarianceCalculator_h
#define __itkCovarianceCalculator_h

#include "itkSampleAlgorithmBase.h"

#include "itkArray.h"
#include "itkVariableSizeMatrix.h"

namespace itk{ 
namespace Statistics{
  
template< class TSample >
class CovarianceCalculator :
    public SampleAlgorithmBase< TSample >
{
public:
  typedef CovarianceCalculator Self;
  typedef SampleAlgorithmBase< TSample > Superclass ;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkTypeMacro(CovarianceCalculator, SampleAlgorithmBase);
  itkNewMacro(Self) ;
  
  typedef typename Superclass::MeasurementVectorSizeType MeasurementVectorSizeType;

  typedef typename Superclass::MeasurementVectorType MeasurementVectorType;
  
  typedef Array< double >                            MeanType;

  typedef VariableSizeMatrix< double >               OutputType;

  void SetMean(MeanType* mean) ;

  MeanType* GetMean() ;

  const OutputType * GetOutput() const;

protected:
  CovarianceCalculator() ;
  virtual ~CovarianceCalculator() ;
  void PrintSelf(std::ostream& os, Indent indent) const;

  void GenerateData() ;

  void ComputeCovarianceWithGivenMean() ;

  void ComputeCovarianceWithoutGivenMean() ;

private:
  MeanType* m_Mean ;
  MeanType* m_InternalMean ;
  OutputType m_Output ;
} ; // end of class
    
} // end of namespace Statistics 
} // end of namespace itk 

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

#endif

---