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itkImageToListAdaptor.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkImageToListAdaptor.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-03-04 15:23:50 $
00007   Version:   $Revision: 1.39 $
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 __itkImageToListAdaptor_h
00018 #define __itkImageToListAdaptor_h
00019 
00020 #include <typeinfo>
00021 
00022 #include "itkImage.h"
00023 #include "itkPixelTraits.h"
00024 #include "itkListSampleBase.h"
00025 #include "itkSmartPointer.h"
00026 #include "itkImageRegionIterator.h"
00027 #include "itkFixedArray.h"
00028 #include "itkMacro.h"
00029 
00030 namespace itk { 
00031 namespace Statistics {
00032 
00062 template < class TImage,
00063            class TMeasurementVector = 
00064            ITK_TYPENAME TImage::PixelType >
00065 class ITK_EXPORT ImageToListAdaptor : 
00066     public ListSampleBase< TMeasurementVector >
00067 {
00068 public:
00070   typedef ImageToListAdaptor                   Self;
00071   typedef ListSampleBase< TMeasurementVector > Superclass;
00072   typedef SmartPointer< Self >                 Pointer;
00073   typedef SmartPointer<const Self>             ConstPointer;
00074 
00076   itkTypeMacro(ImageToListAdaptor, ListSampleBase);
00077 
00079   itkNewMacro(Self);
00080 
00082   typedef TImage                                         ImageType;
00083   typedef typename ImageType::Pointer                    ImagePointer;
00084   typedef typename ImageType::ConstPointer               ImageConstPointer;
00085   typedef typename ImageType::IndexType                  IndexType;
00086   typedef typename ImageType::PixelType                  PixelType;
00087   typedef typename ImageType::PixelContainerConstPointer PixelContainerConstPointer;
00088   typedef typename ImageType::PixelContainer::ElementIdentifier 
00089                                                          InstanceIdentifier;
00090 
00092   typedef ImageRegionIterator< ImageType > IteratorType; 
00093   typedef PixelTraits< typename TImage::PixelType > PixelTraitsType;
00094 
00097   typedef typename PixelTraitsType::ValueType            MeasurementType;
00098   typedef typename Superclass::FrequencyType             FrequencyType;
00099   typedef typename Superclass::TotalFrequencyType        TotalFrequencyType;
00100   typedef typename Superclass::MeasurementVectorSizeType MeasurementVectorSizeType;
00101 
00103   itkStaticConstMacro(MeasurementVectorSize, unsigned int,
00104                       PixelTraitsType::Dimension);
00105 
00106   virtual void SetMeasurementVectorSize( const MeasurementVectorSizeType s )
00107     {
00108     // Measurement vector size for this class is fixed as the pixel's 
00109     // dimension. This method should throw an exception if the user tries to 
00110     // set the dimension to a different value. 
00111     if( s != MeasurementVectorSize )
00112       {
00113       itkExceptionMacro( << "Measurement vector size for the image adaptor obtained"
00114           << " from the pixel dimension is: " << MeasurementVectorSize << " but you "
00115           << "are setting it to " << s);
00116       }
00117     }
00118 
00119  unsigned int GetMeasurementVectorSize() const 
00120    {
00121    return MeasurementVectorSize;
00122    } 
00123     
00124   
00125 
00126   typedef TMeasurementVector    MeasurementVectorType;
00127   typedef MeasurementVectorType ValueType;
00128 
00130   void SetImage(const TImage* image);
00131 
00133   const TImage* GetImage() const;
00134 
00136   unsigned int Size() const;
00137 
00138   inline virtual const MeasurementVectorType & GetMeasurementVector(const InstanceIdentifier &id) const;
00139 
00140   inline FrequencyType GetFrequency(const InstanceIdentifier &id) const;
00141 
00142   TotalFrequencyType GetTotalFrequency() const;
00143   
00144  
00145   class Iterator
00146   {
00147   public:
00148     
00149     Iterator(){}
00150     
00151     Iterator(InstanceIdentifier id, Pointer pContainer)
00152       :m_Id(id),m_Container(pContainer) {}
00153     
00154     FrequencyType GetFrequency() const
00155       { return 1;}
00156 
00157     const MeasurementVectorType & GetMeasurementVector() const
00158       { return m_Container->GetMeasurementVector(m_Id);} 
00159 
00160     InstanceIdentifier GetInstanceIdentifier() const
00161       { return m_Id;}
00162 
00163     Iterator& operator++()
00164       { ++m_Id; return *this;}
00165     
00166     Iterator& operator+(int n)
00167       { m_Id += n; return *this;}
00168     
00169     Iterator& operator-(int n)
00170       { m_Id -= n; return *this;}
00171 
00172     bool operator!=(const Iterator &it)
00173       {
00174       if (m_Id != it.m_Id)
00175         {return true;}
00176 
00177       if (m_Container != it.m_Container)
00178         { return true;}
00179 
00180       return false;
00181       } 
00182     
00183     bool operator==(const Iterator &it)
00184       { return !(*this != it);}
00185     
00186     Iterator& operator = (const Iterator &iter)
00187       { 
00188       m_Id = iter.m_Id; 
00189       m_Container = iter.m_Container; 
00190       return *this;
00191       }
00192 
00193     Iterator(const Iterator &iter)
00194       {   
00195       m_Id = iter.m_Id; 
00196       m_Container = iter.m_Container; 
00197       }
00198     
00199   private:
00200     InstanceIdentifier m_Id;  // Current id 
00201     Pointer m_Container;
00202   };
00203 
00204 
00205   class ConstIterator
00206     {
00207     public:
00208     
00209     ConstIterator(){}
00210     
00211     ConstIterator(InstanceIdentifier id, ConstPointer pContainer)
00212       :m_Id(id),m_Container(pContainer) {}
00213     
00214     FrequencyType GetFrequency() const
00215       { return 1;}
00216 
00217     const MeasurementVectorType & GetMeasurementVector() const
00218       { return m_Container->GetMeasurementVector(m_Id);} 
00219 
00220     InstanceIdentifier GetInstanceIdentifier() const
00221       { return m_Id;}
00222 
00223     ConstIterator& operator++()
00224       { ++m_Id; return *this;}
00225     
00226     ConstIterator& operator+(int n)
00227       { m_Id += n; return *this;}
00228     
00229     ConstIterator& operator-(int n)
00230       { m_Id -= n; return *this;}
00231 
00232     bool operator!=(const ConstIterator &it)
00233       {
00234       if (m_Id != it.m_Id)
00235         {return true;}
00236 
00237       if (m_Container != it.m_Container)
00238         { return true;}
00239 
00240       return false;
00241       }
00242     
00243     bool operator==(const ConstIterator &it)
00244       { return !(*this != it);}
00245     
00246     ConstIterator& operator = (const ConstIterator &iter)
00247       {
00248       m_Id = iter.m_Id; 
00249       m_Container = iter.m_Container; 
00250       return *this;
00251       }
00252 
00253     ConstIterator(const ConstIterator &iter)
00254       { 
00255       m_Id = iter.m_Id; 
00256       m_Container = iter.m_Container; 
00257       }
00258     
00259   private:
00260     InstanceIdentifier m_Id;  // Current id 
00261     ConstPointer m_Container;
00262   };
00263 
00264   Iterator Begin()
00265     { 
00266     Iterator iter(0, this);
00267     return iter; 
00268     }
00269   
00270   Iterator End()
00271     {
00272     Iterator iter(this->Size(), this); 
00273     return iter; 
00274     }
00275 
00276   ConstIterator Begin() const
00277     { 
00278     ConstIterator iter(0, this);
00279     return iter; 
00280     }
00281   
00282   ConstIterator End() const
00283     {
00284     ConstIterator iter(this->Size(), this); 
00285     return iter; 
00286     }
00287  
00288 protected:
00289   ImageToListAdaptor();
00290   virtual ~ImageToListAdaptor() {}
00291   void PrintSelf(std::ostream& os, Indent indent) const;  
00292 
00293   itkGetConstReferenceMacro(PixelContainer,PixelContainerConstPointer);
00294   itkGetConstReferenceMacro(UseBuffer,bool);
00295   itkGetConstReferenceMacro(ImageBeginIndex,IndexType);
00296   itkGetConstReferenceMacro(ImageEndIndex,IndexType);
00297 
00298 
00299 private:
00300   ImageToListAdaptor(const Self&); //purposely not implemented
00301   void operator=(const Self&); //purposely not implemented
00302 
00303   PixelContainerConstPointer m_PixelContainer;
00304   bool                       m_UseBuffer;
00305   IndexType                  m_ImageBeginIndex;
00306   IndexType                  m_ImageEndIndex;
00307 
00308   ImageConstPointer m_Image;
00309 }; // end of class ImageToListAdaptor
00310 
00311 template < class TImage, class TMeasurementVector >
00312 inline const TMeasurementVector &
00313 ImageToListAdaptor< TImage, TMeasurementVector >
00314 ::GetMeasurementVector(const InstanceIdentifier &id) const
00315 {
00316   if ( m_UseBuffer )
00317     {
00318     return *( reinterpret_cast< const MeasurementVectorType* >(&(*m_PixelContainer)[id]) );
00319     }
00320   else
00321     {
00322     return *(reinterpret_cast< const MeasurementVectorType* >
00323              ( &(m_Image->GetPixel( m_Image->ComputeIndex( id ) ) ) ) );
00324     }
00325 }
00326 
00328 template < class TImage, class TMeasurementVector >
00329 inline unsigned int
00330 ImageToListAdaptor< TImage, TMeasurementVector >
00331 ::Size() const
00332 {
00333   return m_PixelContainer->Size();
00334 }
00335 
00336 template < class TImage, class TMeasurementVector >
00337 inline typename ImageToListAdaptor< TImage, TMeasurementVector >::FrequencyType
00338 ImageToListAdaptor< TImage, TMeasurementVector >
00339 ::GetFrequency(const InstanceIdentifier &) const 
00340 {
00341   return NumericTraits< FrequencyType >::One;
00342 }
00343 
00344 } // end of namespace Statistics
00345 } // end of namespace itk
00346 
00347 #ifndef ITK_MANUAL_INSTANTIATION
00348 #include "itkImageToListAdaptor.txx"
00349 #endif
00350 
00351 #endif
00352 

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