itkCovarianceCalculator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkCovarianceCalculator.h,v $
  Language:  C++
  Date:      $Date: 2003/12/15 01:00:46 $
  Version:   $Revision: 1.12 $

  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 "itkVector.h"
#include "itkMatrix.h"

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

  itkTypeMacro(CovarianceCalculator, Object);
  itkNewMacro(Self) ;
  
  itkStaticConstMacro(MeasurementVectorSize, unsigned int,
                      TSample::MeasurementVectorSize) ;

  typedef Vector< double, itkGetStaticConstMacro(MeasurementVectorSize) > MeanType ;
  typedef Matrix< double, itkGetStaticConstMacro(MeasurementVectorSize), itkGetStaticConstMacro(MeasurementVectorSize) > 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:
  OutputType m_Output ;
  MeanType* m_Mean ;
  MeanType* m_InternalMean ;
} ; // end of class
    
} // end of namespace Statistics 
} // end of namespace itk 

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

#endif

---