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itkJoinImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkJoinImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2006-04-08 12:44:49 $
00007   Version:   $Revision: 1.16 $
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 __itkJoinImageFilter_h
00018 #define __itkJoinImageFilter_h
00019 
00020 #include "itkBinaryFunctorImageFilter.h"
00021 #include "itkPixelTraits.h"
00022 
00023 namespace itk
00024 {
00025   
00026 namespace Functor {  
00045 template <class TPixel1, class TPixel2>
00046 class JoinFunctor
00047 {
00048 public:
00049   JoinFunctor() {}
00050   ~JoinFunctor() {}
00052 
00054   typedef JoinFunctor Self;
00055 
00057   typedef typename PixelTraits<TPixel1>::ValueType ValueType1;
00058   typedef typename PixelTraits<TPixel2>::ValueType ValueType2;
00059   typedef typename JoinTraits<ValueType1, ValueType2>::ValueType JoinValueType;
00060 
00062   itkStaticConstMacro(Dimension1, unsigned int,
00063                       PixelTraits<TPixel1>::Dimension);
00064   itkStaticConstMacro(Dimension2, unsigned int,
00065                       PixelTraits<TPixel2>::Dimension);
00066   itkStaticConstMacro(JoinDimension, unsigned int,
00067                       Dimension1 + Dimension2);
00069 
00071   typedef Vector<JoinValueType, itkGetStaticConstMacro(JoinDimension)> JoinType;
00072 
00073   bool operator!=( const JoinFunctor & ) const
00074   {
00075     return false;
00076   }
00077   bool operator==( const JoinFunctor & other ) const
00078   {
00079     return !(*this != other);
00080   }
00081 
00083   inline JoinType operator()( const TPixel1 & A, const TPixel2 & B)
00084   {
00085     JoinType out;
00086 
00087     // Copy A into the output, casting as necessary
00088     this->FirstCopier(out, 0, A);
00089 
00090     // Copy B into the output, starting where A left off,casting as necessary
00091     this->SecondCopier(out, Dimension1, B);
00092 
00093     return out;
00094   }
00095 
00096 private:
00103   struct CopierDispatchBase {};
00104   template<unsigned int VDimension>
00105   struct CopierDispatch : public CopierDispatchBase {};
00106 
00117   void FirstCopier(JoinType& out, unsigned int idx, const TPixel1& A)
00118   {
00119     FirstCopier(CopierDispatch<Dimension1>(), out, idx, A);
00120   }
00121 
00123   void FirstCopier(CopierDispatchBase,
00124                    JoinType& out, unsigned int idx, const TPixel1& A)
00125   {
00126     for (unsigned int i=0; i < Dimension1; i++, idx++)
00127       { out[idx] = static_cast<JoinValueType>(A[i]); }
00128   }
00130 
00132   void FirstCopier(CopierDispatch<1>,
00133                    JoinType& out, unsigned int idx, const TPixel1& A)
00134   { out[idx] = static_cast<JoinValueType>(A); }
00135 
00141   void SecondCopier(JoinType& out, unsigned int idx, const TPixel2& B)
00142   {
00143     SecondCopier(CopierDispatch<Dimension2>(), out, idx, B);
00144   }
00145 
00147   void SecondCopier(CopierDispatchBase,
00148                     JoinType& out, unsigned int idx, const TPixel2& B)
00149   {
00150     for (unsigned int i=0; i < Dimension2; i++, idx++)
00151       { out[idx] = static_cast<JoinValueType>(B[i]); }
00152   }
00154 
00156   void SecondCopier(CopierDispatch<1>,
00157                     JoinType& out, unsigned int idx, const TPixel2& B)
00158   {
00159     out[idx] = static_cast<JoinValueType>(B);
00160   }
00161 }; //class JoinFunction
00163 
00164 template <typename TImage1, typename TImage2>
00165 struct MakeJoin
00166 {
00167   typedef JoinFunctor<typename TImage1::PixelType,
00168                       typename TImage2::PixelType> FunctorType;
00169   typedef Image<typename FunctorType::JoinType,
00170                 ::itk::GetImageDimension<TImage1>::ImageDimension> ImageType;
00171 };
00172 
00173 } //namespace functor
00174   
00198 template <class TInputImage1, class TInputImage2>
00199 class ITK_EXPORT JoinImageFilter:
00200   public BinaryFunctorImageFilter<TInputImage1,
00201                                   TInputImage2,
00202                                   ITK_TYPENAME
00203                                   Functor::MakeJoin<TInputImage1,
00204                                                     TInputImage2>::ImageType,
00205                                   ITK_TYPENAME
00206                                   Functor::MakeJoin<TInputImage1,
00207                                                     TInputImage2>::FunctorType>
00208 {
00209 public:
00211   itkStaticConstMacro(OutputImageDimension, unsigned int,
00212                       TInputImage1::ImageDimension);
00213 
00215   typedef JoinImageFilter  Self;
00216 
00218   typedef typename Functor::MakeJoin<TInputImage1,
00219                                      TInputImage2>::FunctorType FunctorType;
00220   typedef typename Functor::MakeJoin<TInputImage1,
00221                                      TInputImage2>::ImageType OutputImageType;
00222   typedef typename FunctorType::JoinType OutputImagePixelType;  
00223 
00225   typedef BinaryFunctorImageFilter<TInputImage1,TInputImage2, OutputImageType,
00226                                    FunctorType > Superclass; 
00227   typedef SmartPointer<Self>   Pointer;
00228   typedef SmartPointer<const Self>  ConstPointer;
00229 
00231   itkNewMacro(Self);
00232 
00234   itkTypeMacro(JoinImageFilter, BinaryFunctorImageFilter);
00235 
00236 #ifdef ITK_USE_CONCEPT_CHECKING
00237 
00238   itkConceptMacro(Input1HasPixelTraitsCheck,
00239     (Concept::HasPixelTraits<typename TInputImage1::PixelType>));
00240   itkConceptMacro(Input2HasPixelTraitsCheck,
00241     (Concept::HasPixelTraits<typename TInputImage2::PixelType>));
00242   itkConceptMacro(Input1Input2HasJoinTraitsCheck,
00243     (Concept::HasJoinTraits<typename PixelTraits<typename TInputImage1::PixelType>::ValueType,
00244                             typename PixelTraits<typename TInputImage2::PixelType>::ValueType>));
00245 
00247 #endif
00248 
00249 protected:
00250   JoinImageFilter() {}
00251   virtual ~JoinImageFilter() {}
00252 
00253 private:
00254   JoinImageFilter(const Self&); //purposely not implemented
00255   void operator=(const Self&); //purposely not implemented
00256 
00257 };
00258 
00259   
00260 } // end namespace itk
00261   
00262 #endif
00263 

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