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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 )
00048 {
00049 return (TOutput)vcl_log((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<TInputImage,TOutputImage,
00064 Function::Log< typename TInputImage::PixelType,
00065 typename TOutputImage::PixelType> > Superclass;
00066 typedef SmartPointer<Self> Pointer;
00067 typedef SmartPointer<const Self> ConstPointer;
00068
00070 itkNewMacro(Self);
00071
00072 #ifdef ITK_USE_CONCEPT_CHECKING
00073
00074 itkConceptMacro(InputConvertibleToDoubleCheck,
00075 (Concept::Convertible<typename TInputImage::PixelType, double>));
00076 itkConceptMacro(DoubleConvertibleToOutputCheck,
00077 (Concept::Convertible<double, typename TOutputImage::PixelType>));
00078
00080 #endif
00081
00082 protected:
00083 LogImageFilter() {}
00084 virtual ~LogImageFilter() {}
00085
00086 private:
00087 LogImageFilter(const Self&);
00088 void operator=(const Self&);
00089
00090 };
00091
00092 }
00093
00094
00095 #endif
00096