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vnl_gaussian_kernel_1d.h

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00001 #ifndef vnl_gaussian_kernel_1d_h_
00002 #define vnl_gaussian_kernel_1d_h_
00003 
00004 //:
00005 //  \file
00006 //  \brief Holds one half of a discretely sampled 1D gaussian distribution
00007 //  \author Andrew W. Fitzgibbon, Oxford RRG, 07 Aug 97
00008 //
00009 //  Modifications
00010 //  970807 AWF Initial version.
00011 //  dac (Manchester) 28/03/2001: tidied up documentation
00012 //
00013 
00014 #include <vnl/vnl_vector.h>
00015 
00016 
00017 //: Holds one half of a discretely sampled 1D gaussian distribution
00018 //  vnl_gaussian_kernel_1d is a class that holds one half of a discretely
00019 //  sampled 1D gaussian distribution.
00020 //
00021 
00022 class vnl_gaussian_kernel_1d {
00023 public:
00024   // Constructors/Destructors--------------------------------------------------
00025   
00026   vnl_gaussian_kernel_1d(double sigma, double cutoff = 0.5/256.0);
00027 
00028   double G(double x) const;
00029   
00030   int width() const { return vec_.size(); }
00031   double operator [] (int i) const { return vec_[i]; }
00032   
00033 protected:
00034   // Data Members--------------------------------------------------------------
00035   vnl_vector<double> vec_;
00036   double inscale_;
00037 
00038   // Helpers-------------------------------------------------------------------
00039 };
00040 
00041 #endif // vnl_gaussian_kernel_1d_h_

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