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itkGaussianOperator.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkGaussianOperator.h,v $
00005   Language:  C++
00006   Date:      $Date: 2003/09/10 14:29:09 $
00007   Version:   $Revision: 1.22 $
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 __itkGaussianOperator_h
00018 #define __itkGaussianOperator_h
00019 
00020 #include "itkNeighborhoodOperator.h"
00021 #include <math.h>
00022 namespace itk {
00023 
00059 template<class TPixel,unsigned int VDimension=2,
00060   class TAllocator = NeighborhoodAllocator<TPixel> >
00061 class ITK_EXPORT GaussianOperator
00062   : public NeighborhoodOperator<TPixel, VDimension, TAllocator>
00063 {
00064 public:
00066   typedef GaussianOperator Self;
00067   typedef NeighborhoodOperator<TPixel, VDimension, TAllocator>  Superclass;
00068   
00070   GaussianOperator() : m_Variance(1), m_MaximumError(.01), m_MaximumKernelWidth(30) { }
00071 
00073   GaussianOperator(const Self &other)
00074     : NeighborhoodOperator<TPixel, VDimension, TAllocator>(other)
00075   {
00076     m_Variance = other.m_Variance;
00077     m_MaximumError = other.m_MaximumError;
00078   }
00079 
00081   Self &operator=(const Self &other)
00082   {
00083     Superclass::operator=(other);
00084     m_Variance = other.m_Variance;
00085     m_MaximumError = other.m_MaximumError;
00086     m_MaximumKernelWidth = other.m_MaximumKernelWidth;
00087     return *this;
00088   }
00089   
00091   void SetVariance(const double &variance)
00092   {  m_Variance = variance;  }
00093 
00098   void SetMaximumError(const double &max_error)
00099   {
00100     if (max_error >= 1 || max_error <= 0)
00101       {
00102         throw ExceptionObject(__FILE__, __LINE__);
00103       }
00104     
00105     m_MaximumError = max_error;
00106   }
00107   
00109   double GetVariance()
00110     {  return m_Variance;  }
00111 
00116   double GetMaximumError()
00117     {    return m_MaximumError;  }
00118 
00123   void SetMaximumKernelWidth( unsigned int n )
00124     {    m_MaximumKernelWidth = n; }
00125 
00127   unsigned int GetMaximumKernelWidth() const
00128     {   return m_MaximumKernelWidth; }
00129   
00131   virtual void PrintSelf(std::ostream &os, Indent i) const
00132   {
00133     os << i << "GaussianOperator { this=" << this
00134        << ", m_Variance = " << m_Variance
00135        << ", m_MaximumError = " << m_MaximumError
00136        << "} "  << std::endl;
00137     Superclass::PrintSelf(os, i.GetNextIndent());
00138   }
00139   
00140 protected:
00141   typedef typename Superclass::CoefficientVector CoefficientVector;
00142 
00144   double ModifiedBesselI0(double);
00145 
00148   double ModifiedBesselI1(double);
00149 
00152   double ModifiedBesselI(int, double);
00153 
00155   CoefficientVector GenerateCoefficients();
00156 
00158   void Fill(const CoefficientVector& coeff)
00159   {    this->FillCenteredDirectional(coeff);  }
00160 
00161 private:
00163   double m_Variance;
00164   
00167   double m_MaximumError;
00168 
00172   unsigned int m_MaximumKernelWidth;
00173 
00175   const char *GetNameOfClass()
00176     { return "itkGaussianOperator"; }
00177   
00178 };
00179 
00180 } // namespace itk
00181 
00182 
00183 #ifndef ITK_MANUAL_INSTANTIATION
00184 #include "itkGaussianOperator.txx"
00185 #endif
00186 
00187 #endif

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