itkNaryAddImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkNaryAddImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-16 19:33:44 $
  Version:   $Revision: 1.35 $

  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 __itkNaryAddImageFilter_h
#define __itkNaryAddImageFilter_h

#include "itkNaryFunctorImageFilter.h"
#include "itkNumericTraits.h"

namespace itk
{
  
namespace Functor {  
  
template< class TInput, class TOutput >
class Add1
{
public:
  typedef typename NumericTraits< TInput >::AccumulateType AccumulatorType;
  Add1() {}
  ~Add1() {}
  inline TOutput operator()( const std::vector< TInput > & B)
    {
    AccumulatorType sum = NumericTraits< TOutput >::Zero;
    for( unsigned int i=0; i< B.size(); i++ )
      {
      sum += static_cast< TOutput >(B[i]);
      }
    return static_cast<TOutput>( sum );
    }
  bool operator== (const Add1&) const
    {
    return true;
    }
  bool operator!= (const Add1&) const
    {
    return false;
    }
}; 
}
template <class TInputImage, class TOutputImage>
class ITK_EXPORT NaryAddImageFilter :
    public
NaryFunctorImageFilter<TInputImage,TOutputImage, 
                       Functor::Add1<typename TInputImage::PixelType,  typename TInputImage::PixelType > > 
{
public:
  typedef NaryAddImageFilter        Self;
  typedef NaryFunctorImageFilter<
    TInputImage,TOutputImage, 
    Functor::Add1<typename TInputImage::PixelType,  
                  typename TInputImage::PixelType> >
                                    Superclass;
  typedef SmartPointer<Self>        Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(NaryAddImageFilter, 
               NaryFunctorImageFilter);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputConvertibleToOutputCheck,
    (Concept::Convertible<typename TInputImage::PixelType,
                          typename TOutputImage::PixelType>));
  itkConceptMacro(InputHasZeroCheck,
    (Concept::HasZero<typename TInputImage::PixelType>));

#endif

protected:
  NaryAddImageFilter() {}
  virtual ~NaryAddImageFilter() {}

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

};

} // end namespace itk


#endif