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itkConstrainedValueDifferenceImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkConstrainedValueDifferenceImageFilter.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) Insight Software Consortium. All rights reserved.
00008   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even 
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00012      PURPOSE.  See the above copyright notices for more information.
00013 
00014 =========================================================================*/
00015 #ifndef __itkConstrainedValueDifferenceImageFilter_h
00016 #define __itkConstrainedValueDifferenceImageFilter_h
00017 
00018 #include "itkBinaryFunctorImageFilter.h"
00019 #include "itkNumericTraits.h"
00020 
00021 namespace itk
00022 {
00023   
00050 namespace Functor {  
00051   
00052 template< class TInput1, class TInput2, class TOutput>
00053 class ConstrainedValueDifference
00054 {
00055 public:
00056   ConstrainedValueDifference() {};
00057   ~ConstrainedValueDifference() {};
00058   bool operator!=( const ConstrainedValueDifference & ) const
00059   {
00060     return false;
00061   }
00062   bool operator==( const ConstrainedValueDifference & other ) const
00063   {
00064     return !(*this != other);
00065   }
00066   inline TOutput operator()( const TInput1 & A, 
00067                              const TInput2 & B)
00068   {
00069     const double dA = static_cast<double>( A );
00070     const double dB = static_cast<double>( B );
00071     const double diff = dA - dB;
00072     const double cdiff = ( diff > NumericTraits<TOutput>::min() ) ? diff : NumericTraits<TOutput>::min(); 
00073     return static_cast<TOutput>( cdiff );
00074   }
00075 }; 
00076 }
00077 
00078 template <class TInputImage1, class TInputImage2, class TOutputImage>
00079 class ITK_EXPORT ConstrainedValueDifferenceImageFilter :
00080     public
00081 BinaryFunctorImageFilter<TInputImage1,TInputImage2,TOutputImage, 
00082                          Functor::ConstrainedValueDifference< 
00083   typename TInputImage1::PixelType, 
00084   typename TInputImage2::PixelType,
00085   typename TOutputImage::PixelType>   >
00086 {
00087 public:
00089   typedef ConstrainedValueDifferenceImageFilter  Self;
00090   typedef BinaryFunctorImageFilter<TInputImage1,TInputImage2,TOutputImage, 
00091                                    Functor::ConstrainedValueDifference< 
00092     typename TInputImage1::PixelType, 
00093     typename TInputImage2::PixelType,
00094     typename TOutputImage::PixelType>   
00095   >  Superclass;
00096   typedef SmartPointer<Self>   Pointer;
00097   typedef SmartPointer<const Self>  ConstPointer;
00098 
00100   itkNewMacro(Self);
00101 
00102 #ifdef ITK_USE_CONCEPT_CHECKING
00103 
00104   itkConceptMacro(Input1ConvertibleToDoubleCheck,
00105     (Concept::Convertible<typename TInputImage1::PixelType, double>));
00106   itkConceptMacro(Input2ConvertibleToDoubleCheck,
00107     (Concept::Convertible<typename TInputImage2::PixelType, double>));
00108   itkConceptMacro(DoubleConvertibleToOutputCheck,
00109     (Concept::Convertible<double, typename TOutputImage::PixelType>));
00110   itkConceptMacro(DoubleGreaterThanOutputCheck,
00111     (Concept::GreaterThanComparable<double, typename TOutputImage::PixelType>));
00112 
00114 #endif
00115 
00116 protected:
00117   ConstrainedValueDifferenceImageFilter() {}
00118   virtual ~ConstrainedValueDifferenceImageFilter() {}
00119 
00120 private:
00121   ConstrainedValueDifferenceImageFilter(const Self&); //purposely not implemented
00122   void operator=(const Self&); //purposely not implemented
00123 
00124 };
00125 
00126 } // end namespace itk
00127 
00128 
00129 #endif
00130 

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