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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 ) const
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&);
00093 void operator=(const Self&);
00094
00095 };
00096
00097 }
00098
00099
00100 #endif
00101