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itkLogImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkLogImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2002/01/15 19:36:07 $
00007   Version:   $Revision: 1.14 $
00008 
00009   Copyright (c) 2002 Insight Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkLogImageFilter_h
00018 #define __itkLogImageFilter_h
00019 
00020 #include "itkUnaryFunctorImageFilter.h"
00021 #include "vnl/vnl_math.h"
00022 
00023 namespace itk
00024 {
00025   
00031 namespace Function {  
00032   
00033   template< class TInput, class TOutput>
00034   class Log
00035   {
00036   public:
00037     Log() {}
00038     ~Log() {}
00039     inline TOutput operator()( const TInput & A )
00040     {
00041       return (TOutput)log((double)A);
00042     }
00043   }; 
00044 }
00045 template <class TInputImage, class TOutputImage>
00046 class ITK_EXPORT LogImageFilter :
00047     public
00048     UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00049     Function::Log< typename TInputImage::PixelType, 
00050                    typename TOutputImage::PixelType>   >
00051 {
00052 public:
00054   typedef LogImageFilter  Self;
00055   typedef UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00056     Function::Log< typename TInputImage::PixelType, 
00057                    typename TOutputImage::PixelType> > Superclass;
00058   typedef SmartPointer<Self>   Pointer;
00059   typedef SmartPointer<const Self>  ConstPointer;
00060 
00062   itkNewMacro(Self);
00063   
00064 protected:
00065   LogImageFilter() {}
00066   virtual ~LogImageFilter() {}
00067 
00068 private:
00069   LogImageFilter(const Self&); //purposely not implemented
00070   void operator=(const Self&); //purposely not implemented
00071 
00072 };
00073 
00074 } // end namespace itk
00075 
00076 
00077 #endif

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