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itkComplexToRealImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkComplexToRealImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-04-01 14:36:10 $
00007   Version:   $Revision: 1.8 $
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 __itkComplexToRealImageFilter_h
00018 #define __itkComplexToRealImageFilter_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 ComplexToReal
00035 {
00036 public:
00037   ComplexToReal() {}
00038   ~ComplexToReal() {}
00039   bool operator!=( const ComplexToReal & ) const
00040     {
00041     return false;
00042     }
00043   bool operator==( const ComplexToReal & other ) const
00044     {
00045     return !(*this != other);
00046     }
00047   inline TOutput operator()( const TInput & A ) const
00048     {
00049     return (TOutput)( A.real() );
00050     }
00051 }; 
00052 }
00053 
00054 template <class TInputImage, class TOutputImage>
00055 class ITK_EXPORT ComplexToRealImageFilter :
00056     public
00057 UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00058                         Function::ComplexToReal< 
00059   typename TInputImage::PixelType, 
00060   typename TOutputImage::PixelType>   >
00061 {
00062 public:
00064   typedef ComplexToRealImageFilter  Self;
00065   typedef UnaryFunctorImageFilter<
00066     TInputImage,TOutputImage, 
00067     Function::ComplexToReal< typename TInputImage::PixelType, 
00068                              typename TOutputImage::PixelType> >
00069                                     Superclass;
00070   typedef SmartPointer<Self>        Pointer;
00071   typedef SmartPointer<const Self>  ConstPointer;
00072 
00074   itkNewMacro(Self);
00075 
00077   itkTypeMacro(ComplexToRealImageFilter, 
00078                UnaryFunctorImageFilter);
00079 
00080   typedef typename TInputImage::PixelType                     InputPixelType;
00081   typedef typename TOutputImage::PixelType                    OutputPixelType;
00082   typedef typename NumericTraits< InputPixelType >::ValueType InputPixelValueType;
00083 
00084 #ifdef ITK_USE_CONCEPT_CHECKING
00085 
00086   itkConceptMacro(InputConvertibleToOutputCheck,
00087     (Concept::Convertible<InputPixelValueType, OutputPixelType>));
00088 
00090 #endif
00091 
00092 
00093 protected:
00094   ComplexToRealImageFilter() {}
00095   virtual ~ComplexToRealImageFilter() {}
00096 
00097 private:
00098   ComplexToRealImageFilter(const Self&); //purposely not implemented
00099   void operator=(const Self&); //purposely not implemented
00100 
00101 };
00102 
00103 } // end namespace itk
00104 
00105 
00106 #endif
00107 

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