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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: 2008-10-16 17:40:09 $
00007   Version:   $Revision: 1.23 $
00008 
00009   Copyright (c) Insight Software 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   bool operator!=( const Log & ) const
00040     {
00041     return false;
00042     }
00043   bool operator==( const Log & other ) const
00044     {
00045     return !(*this != other);
00046     }
00047   inline TOutput operator()( const TInput & A )
00048     {
00049     return static_cast<TOutput>( vcl_log( static_cast<double>( A ) ) );
00050     }
00051 }; 
00052 }
00053 template <class TInputImage, class TOutputImage>
00054 class ITK_EXPORT LogImageFilter :
00055     public
00056 UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00057                         Function::Log< typename TInputImage::PixelType, 
00058                                        typename TOutputImage::PixelType>   >
00059 {
00060 public:
00062   typedef LogImageFilter                               Self;
00063   typedef UnaryFunctorImageFilter<
00064     TInputImage,TOutputImage, 
00065     Function::Log< typename TInputImage::PixelType, 
00066                    typename TOutputImage::PixelType> > Superclass;
00067   typedef SmartPointer<Self>                           Pointer;
00068   typedef SmartPointer<const Self>                     ConstPointer;
00069 
00071   itkNewMacro(Self);
00072 
00074   itkTypeMacro(LogImageFilter, 
00075                UnaryFunctorImageFilter);
00076 
00077 #ifdef ITK_USE_CONCEPT_CHECKING
00078 
00079   itkConceptMacro(InputConvertibleToDoubleCheck,
00080     (Concept::Convertible<typename TInputImage::PixelType, double>));
00081   itkConceptMacro(DoubleConvertibleToOutputCheck,
00082     (Concept::Convertible<double, typename TOutputImage::PixelType>));
00083 
00085 #endif
00086 
00087 protected:
00088   LogImageFilter() {}
00089   virtual ~LogImageFilter() {}
00090 
00091 private:
00092   LogImageFilter(const Self&); //purposely not implemented
00093   void operator=(const Self&); //purposely not implemented
00094 
00095 };
00096 
00097 } // end namespace itk
00098 
00099 
00100 #endif
00101 

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