itkLogImageAdaptor.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkLogImageAdaptor.h,v $
  Language:  C++
  Date:      $Date: 2009-02-05 19:05:01 $
  Version:   $Revision: 1.13 $

  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 __itkLogImageAdaptor_h
#define __itkLogImageAdaptor_h

#include <itkImageAdaptor.h>
#include "vnl/vnl_math.h"

namespace itk
{
 
namespace Accessor {
template <class TInternalType, class TExternalType >
class ITK_EXPORT LogPixelAccessor  
{
public:
  typedef TExternalType ExternalType;

  typedef TInternalType InternalType;

  static inline void Set(TInternalType & output, const TExternalType & input) 
    {output = (TInternalType)vcl_log((double)input);}

  static inline TExternalType Get( const TInternalType & input ) 
    {return (TExternalType)vcl_log((double)input);}

};

  
} // end namespace Accessor

template <class TImage, class TOutputPixelType>
class ITK_EXPORT LogImageAdaptor : public
      ImageAdaptor<TImage,
                   Accessor::LogPixelAccessor<
                                      typename TImage::PixelType,
                                      TOutputPixelType>   >
{
public:
  typedef LogImageAdaptor                             Self;
  typedef ImageAdaptor<TImage,
                       Accessor::LogPixelAccessor<
                                 typename TImage::PixelType,
                                 TOutputPixelType> >  Superclass;
  typedef SmartPointer<Self>                          Pointer;
  typedef SmartPointer<const Self>                    ConstPointer;

  itkTypeMacro( LogImageAdaptor, ImageAdaptor );

  itkNewMacro(Self);  

protected:
  LogImageAdaptor() {}
  virtual ~LogImageAdaptor() {}
  
private:
  LogImageAdaptor(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
};

} // end namespace itk

#endif