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itkRecursiveGaussianImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkRecursiveGaussianImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2008-10-17 16:30:50 $
00007   Version:   $Revision: 1.27 $
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 __itkRecursiveGaussianImageFilter_h
00018 #define __itkRecursiveGaussianImageFilter_h
00019 
00020 #include "itkRecursiveSeparableImageFilter.h"
00021 
00022 namespace itk
00023 {
00024   
00055 template <typename TInputImage, typename TOutputImage=TInputImage>
00056 class ITK_EXPORT RecursiveGaussianImageFilter :
00057     public RecursiveSeparableImageFilter<TInputImage,TOutputImage> 
00058 {
00059 public:
00061   typedef RecursiveGaussianImageFilter                            Self;
00062   typedef RecursiveSeparableImageFilter<TInputImage,TOutputImage> Superclass;
00063   typedef SmartPointer<Self>                                      Pointer;
00064   typedef SmartPointer<const Self>                                ConstPointer;
00065 
00066   typedef typename Superclass::RealType                           RealType;
00067   typedef typename Superclass::ScalarRealType                     ScalarRealType;
00068 
00070   itkNewMacro(Self);
00071 
00073   itkTypeMacro( RecursiveGaussianImageFilter, RecursiveSeparableImageFilter );
00074 
00077   itkGetMacro( Sigma, ScalarRealType );
00078   itkSetMacro( Sigma, ScalarRealType );
00080 
00084   typedef  enum { ZeroOrder, FirstOrder, SecondOrder } OrderEnumType;
00085 
00087   typedef TOutputImage      OutputImageType;
00088 
00089 
00105   itkSetMacro( NormalizeAcrossScale, bool );
00106   itkGetMacro( NormalizeAcrossScale, bool );
00107 
00114   itkSetMacro( Order, OrderEnumType );
00115   itkGetMacro( Order, OrderEnumType );
00117 
00119   void SetZeroOrder();
00120 
00122   void SetFirstOrder();
00123 
00125   void SetSecondOrder();
00126 
00127    
00128 protected:
00129   RecursiveGaussianImageFilter();
00130   virtual ~RecursiveGaussianImageFilter() {};
00131   void PrintSelf(std::ostream& os, Indent indent) const;
00132 
00137   virtual void SetUp(ScalarRealType spacing);
00138 
00139 private:  
00140   RecursiveGaussianImageFilter(const Self&); //purposely not implemented
00141   void operator=(const Self&); //purposely not implemented
00142 
00144   void ComputeNCoefficients(ScalarRealType sigmad,
00145           ScalarRealType A1, ScalarRealType B1, ScalarRealType W1, ScalarRealType L1,
00146           ScalarRealType A2, ScalarRealType B2, ScalarRealType W2, ScalarRealType L2,
00147           ScalarRealType& N0, ScalarRealType& N1,
00148           ScalarRealType& N2, ScalarRealType& N3,
00149           ScalarRealType& SN, ScalarRealType& DN, ScalarRealType& EN);
00150 
00152   void ComputeDCoefficients(ScalarRealType sigmad,
00153           ScalarRealType W1, ScalarRealType L1, ScalarRealType W2, ScalarRealType L2,
00154           ScalarRealType& SD, ScalarRealType& DD, ScalarRealType& ED);
00155 
00158   void ComputeRemainingCoefficients(bool symmetric);
00159 
00161   ScalarRealType m_Sigma;
00162 
00164   bool m_NormalizeAcrossScale; 
00165 
00166   OrderEnumType m_Order;
00167 };
00168 
00169 } // end namespace itk
00170 
00171 #ifndef ITK_MANUAL_INSTANTIATION
00172 #include "itkRecursiveGaussianImageFilter.txx"
00173 #endif
00174 
00175 #endif
00176 

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