itkTensorRelativeAnisotropyImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkTensorRelativeAnisotropyImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-04-01 14:36:36 $
  Version:   $Revision: 1.7 $

  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 __itkTensorRelativeAnisotropyImageFilter_h
#define __itkTensorRelativeAnisotropyImageFilter_h

#include "itkUnaryFunctorImageFilter.h"

namespace itk
{

// This functor class invokes the computation of relative anisotropy from
// every pixel.
namespace Functor {  
 
template< typename TInput >
class TensorRelativeAnisotropyFunction
{
public:
  typedef typename TInput::RealValueType  RealValueType;
  TensorRelativeAnisotropyFunction() {}
  ~TensorRelativeAnisotropyFunction() {}
  bool operator!=( const TensorRelativeAnisotropyFunction & ) const
    {
    return false;
    }
  bool operator==( const TensorRelativeAnisotropyFunction & other ) const
    {
    return !(*this != other);
    }
  inline RealValueType operator()( const TInput & x ) const
    {
    return x.GetRelativeAnisotropy();
    }
}; 

}  // end namespace functor


template <typename  TInputImage, typename  TOutputImage=TInputImage>
class ITK_EXPORT TensorRelativeAnisotropyImageFilter :
    public
UnaryFunctorImageFilter<TInputImage,TOutputImage, 
                        Functor::TensorRelativeAnisotropyFunction< 
                                        typename TInputImage::PixelType> > 
{
public:
  typedef TensorRelativeAnisotropyImageFilter  Self;
  typedef UnaryFunctorImageFilter<
    TInputImage,TOutputImage, 
    Functor::TensorRelativeAnisotropyFunction< 
      typename TInputImage::PixelType> >       Superclass;
  typedef SmartPointer<Self>                   Pointer;
  typedef SmartPointer<const Self>             ConstPointer;

  typedef typename Superclass::OutputImageType    OutputImageType;
  typedef typename TOutputImage::PixelType        OutputPixelType;
  typedef typename TInputImage::PixelType         InputPixelType;
  typedef typename InputPixelType::ValueType      InputValueType;

  itkTypeMacro( TensorRelativeAnisotropyImageFilter, UnaryFunctorImageFilter );

  itkNewMacro(Self);

  void PrintSelf(std::ostream& os, Indent indent) const
    { this->Superclass::PrintSelf( os, indent ); }

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputHasNumericTraitsCheck,
                  (Concept::HasNumericTraits<InputValueType>));

#endif

protected:
  TensorRelativeAnisotropyImageFilter() {};
  virtual ~TensorRelativeAnisotropyImageFilter() {};

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

};


  
} // end namespace itk
  
#endif