vnl_gaussian_kernel_1d.h

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#ifndef vnl_gaussian_kernel_1d_h_
#define vnl_gaussian_kernel_1d_h_

//:
//  \file
//  \brief Holds one half of a discretely sampled 1D gaussian distribution
//  \author Andrew W. Fitzgibbon, Oxford RRG, 07 Aug 97
//
//  Modifications
//  970807 AWF Initial version.
//  dac (Manchester) 28/03/2001: tidied up documentation
//

#include <vnl/vnl_vector.h>


//: Holds one half of a discretely sampled 1D gaussian distribution
//  vnl_gaussian_kernel_1d is a class that holds one half of a discretely
//  sampled 1D gaussian distribution.
//

class vnl_gaussian_kernel_1d {
public:
  // Constructors/Destructors--------------------------------------------------
  
  vnl_gaussian_kernel_1d(double sigma, double cutoff = 0.5/256.0);

  double G(double x) const;
  
  int width() const { return vec_.size(); }
  double operator [] (int i) const { return vec_[i]; }
  
protected:
  // Data Members--------------------------------------------------------------
  vnl_vector<double> vec_;
  double inscale_;

  // Helpers-------------------------------------------------------------------
};

#endif // vnl_gaussian_kernel_1d_h_

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