geodesic_erosion.hh

// Copyright (C) 2001, 2002, 2003, 2004  EPITA Research and Development Laboratory
//
// This file is part of the Olena Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License version 2 as published by the
// Free Software Foundation.
//
// 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING.  If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.
//
// As a special exception, you may use this file as part of a free
// software library without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to
// produce an executable, this file does not by itself cause the
// resulting executable to be covered by the GNU General Public
// License.  This exception does not however invalidate any other
// reasons why the executable file might be covered by the GNU General
// Public License.

#ifndef OLENA_MORPHO_GEODESIC_EROSION_HH
# define OLENA_MORPHO_GEODESIC_EROSION_HH

# include <oln/basics.hh>
# include <oln/morpho/stat.hh>
# include <oln/morpho/erosion.hh>
# include <oln/convert/conversion_ng_se.hh>
# include <oln/level/compare.hh>
# include <oln/arith/ops.hh>
# include <mlc/cmp.hh>

namespace oln {
  namespace morpho {

    template<class I1, class I2, class N>
    oln_concrete_type(I1)
      geodesic_erosion(const abstract::non_vectorial_image<I1> & marker,
                       const abstract::non_vectorial_image<I2> & mask,
                       const abstract::neighborhood<N>& Ng)
    {
      mlc::eq<I1::dim, I2::dim>::ensure();
      mlc::eq<I1::dim, N::dim>::ensure();
      precondition(marker.size() == mask.size());
      precondition(level::is_greater_or_equal(marker, mask));
      return arith::max<oln_concrete_type(I1)>(erosion(marker, convert::ng_to_cse(Ng)), mask);
    }

    namespace sure {
      template<class I1, class I2, class N>
      oln_concrete_type(I1)
        geodesic_erosion(const abstract::non_vectorial_image<I1> & marker,
                         const abstract::non_vectorial_image<I2> & mask,
                         const abstract::neighborhood<N>& Ng)
      {
        mlc::eq<I1::dim, I2::dim>::ensure();
        mlc::eq<I1::dim, N::dim>::ensure();
        precondition(marker.size() == mask.size());
        precondition(level::is_greater_or_equal(marker, mask));

        oln_concrete_type(I1) output(marker.size());
        marker.border_adapt_copy(Ng.delta());
        oln_iter_type(I1) p(marker);
        for_all (p)
          output[p] = ntg::max(morpho::min(marker, p, convert::ng_to_cse(Ng)), mask[p]);
        return output;
      }

    }// sure
  } // morpho
} // oln

#endif // OLENA_MORPHO_GEODESIC_EROSION_HH

---