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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: 2008-10-17 01:08:45 $
00007   Version:   $Revision: 1.26 $
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     m_MaximumKernelWidth = other.m_MaximumKernelWidth;
00079     }
00081 
00083   Self &operator=(const Self &other)
00084   {
00085     Superclass::operator=(other);
00086     m_Variance = other.m_Variance;
00087     m_MaximumError = other.m_MaximumError;
00088     m_MaximumKernelWidth = other.m_MaximumKernelWidth;
00089     return *this;
00090   }
00092 
00094   void SetVariance(const double &variance)
00095     {
00096     m_Variance = variance;
00097     }
00098 
00103   void SetMaximumError(const double &max_error)
00104     {
00105     if (max_error >= 1 || max_error <= 0)
00106       {
00107       itkExceptionMacro("Maximum Error Must be in the range [ 0.0 , 1.0 ]");
00108       }
00109 
00110     m_MaximumError = max_error;
00111     }
00112 
00114   double GetVariance()
00115     {  return m_Variance;  }
00116 
00121   double GetMaximumError()
00122     {    return m_MaximumError;  }
00123 
00128   void SetMaximumKernelWidth( unsigned int n )
00129     {    m_MaximumKernelWidth = n; }
00130 
00132   unsigned int GetMaximumKernelWidth() const
00133     {   return m_MaximumKernelWidth; }
00134 
00136   virtual void PrintSelf(std::ostream &os, Indent i) const
00137   {
00138     os << i << "GaussianOperator { this=" << this
00139        << ", m_Variance = " << m_Variance
00140        << ", m_MaximumError = " << m_MaximumError
00141        << "} "  << std::endl;
00142     Superclass::PrintSelf(os, i.GetNextIndent());
00143   }
00145 
00146 protected:
00147   typedef typename Superclass::CoefficientVector CoefficientVector;
00148 
00150   double ModifiedBesselI0(double);
00151 
00154   double ModifiedBesselI1(double);
00155 
00158   double ModifiedBesselI(int, double);
00159 
00161   CoefficientVector GenerateCoefficients();
00162 
00164   void Fill(const CoefficientVector& coeff)
00165   {    this->FillCenteredDirectional(coeff);  }
00166 
00167 private:
00169   double m_Variance;
00170 
00173   double m_MaximumError;
00174 
00178   unsigned int m_MaximumKernelWidth;
00179 
00181   const char *GetNameOfClass()
00182     { return "itkGaussianOperator"; }
00183 
00184 };
00185 
00186 } // namespace itk
00187 
00188 // Define instantiation macro for this template.
00189 #define ITK_TEMPLATE_GaussianOperator(_, EXPORT, x, y) namespace itk { \
00190   _(2(class EXPORT GaussianOperator< ITK_TEMPLATE_2 x >)) \
00191   namespace Templates { typedef GaussianOperator< ITK_TEMPLATE_2 x > \
00192                                                   GaussianOperator##y; } \
00193   }
00194 
00195 #if ITK_TEMPLATE_EXPLICIT
00196 # include "Templates/itkGaussianOperator+-.h"
00197 #endif
00198 
00199 #if ITK_TEMPLATE_TXX
00200 # include "itkGaussianOperator.txx"
00201 #endif
00202 
00203 #endif
00204 

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