itkNaryMaximumImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkNaryMaximumImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-16 19:33:44 $
  Version:   $Revision: 1.9 $

  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 __itkNaryMaximumImageFilter_h
#define __itkNaryMaximumImageFilter_h

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


namespace itk
{
  
namespace Functor {  
  
template< class TInput, class TOutput >
class Maximum1
{
public:
  typedef typename NumericTraits< TOutput >::ValueType OutputValueType; 
  // not sure if this typedef really makes things more clear... could just use TOutput?
  
  Maximum1() {}
  ~Maximum1() {}
  inline TOutput operator()( const std::vector< TInput > & B)
    {
    OutputValueType A = NumericTraits< TOutput >::NonpositiveMin();
    for( unsigned int i=0; i< B.size(); i++ )
      {
      if( A < static_cast<OutputValueType>(B[i]) )
        {
        A = static_cast< OutputValueType > (B[i]);
        }
      }
    return A;
    }
  
  bool operator== (const Maximum1&) const
    {
    return true;
    }
  bool operator!= (const Maximum1&) const
    {
    return false;
    }
};

}
template <class TInputImage, class TOutputImage>
class ITK_EXPORT NaryMaximumImageFilter :
    public
NaryFunctorImageFilter<TInputImage,TOutputImage, 
                       Functor::Maximum1<  typename TInputImage::PixelType, 
                           typename TInputImage::PixelType > > 
{
public:
  typedef NaryMaximumImageFilter    Self;
  typedef NaryFunctorImageFilter<
    TInputImage,TOutputImage, 
    Functor::Maximum1< typename TInputImage::PixelType, 
                       typename TInputImage::PixelType > >
                                    Superclass;
  typedef SmartPointer<Self>        Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(NaryMaximumImageFilter, 
               NaryFunctorImageFilter);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputConvertibleToOutputCheck,
    (Concept::Convertible<typename TInputImage::PixelType,
                          typename TOutputImage::PixelType>));
  itkConceptMacro(InputLessThanComparableCheck,
    (Concept::LessThanComparable<typename TInputImage::PixelType>));
  itkConceptMacro(InputHasNumericTraitsCheck,
    (Concept::HasNumericTraits<typename TInputImage::PixelType>));

#endif

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

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

};

} // end namespace itk


#endif