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itkExpImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkExpImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2006/03/19 04:36:56 $
00007   Version:   $Revision: 1.20 $
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 __itkExpImageFilter_h
00018 #define __itkExpImageFilter_h
00019 
00020 #include "itkUnaryFunctorImageFilter.h"
00021 #include "vnl/vnl_math.h"
00022 
00023 #if defined(_MSC_VER) && (_MSC_VER >= 1300)
00024 #pragma function(exp)
00025 #endif
00026 
00027 namespace itk
00028 {
00029   
00038 namespace Function {  
00039 template< class TInput, class TOutput>
00040 class Exp
00041 {
00042 public:
00043   Exp() {};
00044   ~Exp() {};
00045   bool operator!=( const Exp & ) const
00046   {
00047     return false;
00048   }
00049   bool operator==( const Exp & other ) const
00050   {
00051     return !(*this != other);
00052   }
00053   inline TOutput operator()( const TInput & A )
00054   {
00055     return (TOutput)vcl_exp((double)A);
00056   }
00057 }; 
00058 }
00059 template <class TInputImage, class TOutputImage>
00060 class ITK_EXPORT ExpImageFilter :
00061     public
00062 UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00063                         Function::Exp< 
00064   typename TInputImage::PixelType, 
00065   typename TOutputImage::PixelType>   >
00066 {
00067 public:
00069   typedef ExpImageFilter  Self;
00070   typedef UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00071                                   Function::Exp< typename TInputImage::PixelType, 
00072                                                  typename TOutputImage::PixelType> >  Superclass;
00073   typedef SmartPointer<Self>   Pointer;
00074   typedef SmartPointer<const Self>  ConstPointer;
00075 
00077   itkNewMacro(Self);
00078 
00079 #ifdef ITK_USE_CONCEPT_CHECKING
00080 
00081   itkConceptMacro(InputConvertibleToDoubleCheck,
00082     (Concept::Convertible<typename TInputImage::PixelType, double>));
00083   itkConceptMacro(DoubleConvertibleToOutputCheck,
00084     (Concept::Convertible<double, typename TOutputImage::PixelType>));
00085 
00087 #endif
00088 
00089 protected:
00090   ExpImageFilter() {}
00091   virtual ~ExpImageFilter() {}
00092 
00093 private:
00094   ExpImageFilter(const Self&); //purposely not implemented
00095   void operator=(const Self&); //purposely not implemented
00096 
00097 
00098 };
00099 
00100 } // end namespace itk
00101 
00102 
00103 #endif
00104 

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