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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: 2002/07/08 15:17:08 $
00007   Version:   $Revision: 1.20 $
00008 
00009   Copyright (c) 2002 Insight 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     return *this;
00087   }
00088   
00090   void SetVariance(const double &variance)
00091   {  m_Variance = variance;  }
00092 
00097   void SetMaximumError(const double &max_error)
00098   {
00099     if (max_error >= 1 || max_error <= 0)
00100       {
00101         throw ExceptionObject(__FILE__, __LINE__);
00102       }
00103     
00104     m_MaximumError = max_error;
00105   }
00106   
00108   double GetVariance()
00109     {  return m_Variance;  }
00110 
00115   double GetMaximumError()
00116     {    return m_MaximumError;  }
00117 
00122   void SetMaximumKernelWidth( unsigned int n )
00123     {    m_MaximumKernelWidth = n; }
00124 
00126   unsigned int GetMaximumKernelWidth() const
00127     {   return m_MaximumKernelWidth; }
00128   
00130   virtual void PrintSelf(std::ostream &os, Indent i) const
00131   {
00132     os << i << "GaussianOperator { this=" << this
00133        << ", m_Variance = " << m_Variance
00134        << ", m_MaximumError = " << m_MaximumError
00135        << "} "  << std::endl;
00136     Superclass::PrintSelf(os, i.GetNextIndent());
00137   }
00138   
00139 protected:
00140   typedef typename Superclass::CoefficientVector CoefficientVector;
00141 
00143   double ModifiedBesselI0(double);
00144 
00147   double ModifiedBesselI1(double);
00148 
00151   double ModifiedBesselI(int, double);
00152 
00154   CoefficientVector GenerateCoefficients();
00155 
00157   void Fill(const CoefficientVector& coeff)
00158   {    this->FillCenteredDirectional(coeff);  }
00159 
00160 private:
00162   double m_Variance;
00163   
00166   double m_MaximumError;
00167 
00171   unsigned int m_MaximumKernelWidth;
00172 
00174   const char *GetNameOfClass()
00175     { return "itkGaussianOperator"; }
00176   
00177 };
00178 
00179 } // namespace itk
00180 
00181 
00182 #ifndef ITK_MANUAL_INSTANTIATION
00183 #include "itkGaussianOperator.txx"
00184 #endif
00185 
00186 #endif

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