itkWeightedMeanSampleFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkWeightedMeanSampleFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-05-02 05:44:00 $
  Version:   $Revision: 1.1 $

  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 __itkWeightedMeanSampleFilter_h
#define __itkWeightedMeanSampleFilter_h

#include "itkMeanSampleFilter.h"
#include "itkFunctionBase.h"
#include "itkDataObjectDecorator.h"

namespace itk { 
namespace Statistics {
  
template< class TSample >
class ITK_EXPORT WeightedMeanSampleFilter : public MeanSampleFilter< TSample >
{
public:
  typedef WeightedMeanSampleFilter                Self;
  typedef MeanSampleFilter< TSample >             Superclass;
  typedef SmartPointer<Self>                      Pointer;
  typedef SmartPointer<const Self>                ConstPointer;

  itkTypeMacro(WeightedMeanSampleFilter, MeanSampleFilter);
  itkNewMacro(Self);

  itkSuperclassTraitMacro( SampleType )
  itkSuperclassTraitMacro( MeasurementType )
  itkSuperclassTraitMacro( MeasurementVectorType )
  itkSuperclassTraitMacro( MeasurementVectorSizeType )
  itkSuperclassTraitMacro( MeasurementVectorDecoratedType )
  itkSuperclassTraitMacro( OutputType )

  typedef Array< double > WeightArrayType;

  typedef SimpleDataObjectDecorator< WeightArrayType > InputWeightArrayObjectType;

  itkSetDecoratedInputMacro( Weights, WeightArrayType, 1 );

  typedef FunctionBase< MeasurementVectorType, double > WeightingFunctionType;

  typedef DataObjectDecorator< WeightingFunctionType > InputWeightingFunctionObjectType;

  itkSetDecoratedObjectInputMacro( WeightingFunction, WeightingFunctionType, 2 );

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

  void GenerateData();

  // compute mean with weight array
  void ComputeMeanWithWeights();

  // compute mean using a weighting function
  void ComputeMeanWithWeightingFunction();

private:
  WeightedMeanSampleFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

}; // end of class
    
} // end of namespace Statistics 
} // end of namespace itk 

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

#endif

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