gaussian.hh

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//------------------------------------------------------------------------------
// This file is part of the OpenStructure project <www.openstructure.org>
//
// Copyright (C) 2008-2020 by the OpenStructure authors
// Copyright (C) 2003-2010 by the IPLT authors
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3.0 of the License, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//------------------------------------------------------------------------------
 
 
/*
 
  Authors: Giani Signorell, Ansgar Philippsen
 
*/
 
 
 
#ifndef IMG_ALG_FILTER_GAUSSIAN_H
 
#define IMG_ALG_FILTER_GAUSSIAN_H
 
 
 
#include <ost/img/algorithm.hh>
 
#include <ost/img/image_state.hh>
 
#include <ost/img/image_state/image_state_visitor.hh>
 
#include <ost/message.hh>
 
 
 
#include <ost/dllexport.hh>
 
#include "line_iterator.hh"
 
 
 
namespace ost { namespace img { namespace alg {
 
 
 
 
class DLLEXPORT_IMG_ALG GaussianFilterBase
 
{
 
public:
 
 
  GaussianFilterBase(Real sigma=1.0);
 
 
 
  template <typename T, class D>
 
  void VisitState(ImageStateImpl<T,D>& s);
 
 
 
 
  void SetSigma(Real sigma) {
 
    calcBVals( calcQ(sigma) );
 
  }
 
 
  void SetQ(Real q) {
 
    calcBVals( q );
 
  }
 
  static String GetAlgorithmName() {return "GaussianFilter";}
 
protected:
 
  Real b0_, b1_, b2_, b3_, bb_;
 
 
 
private:
 
  Real calcQ( Real sigma );
 
  void calcBVals( Real q );
 
 
 
  template <typename T, class D>
 
  void lineTransformFW(ImageStateImpl<T,D>& s, ExtentIterator& it);
 
 
 
  template <typename T, class D>
 
  void lineTransformBW(ImageStateImpl<T,D>& s, ExtentIterator& it);
 
};
 
 
 
typedef ImageStateModIPAlgorithm<GaussianFilterBase> GaussianFilter;
 
 
 
}
 
 
 
OST_IMG_ALG_EXPLICIT_INST_DECL(class, ImageStateModIPAlgorithm<alg::GaussianFilterBase>)
 
 
 
}} // namespaces
 
 
 
#endif