--- scribo/ChangeLog | 4 ++ scribo/filter/small_object_groups.hh | 89 ++++++++++++++++++++++++++++++++++ 2 files changed, 93 insertions(+), 0 deletions(-) create mode 100644 scribo/filter/small_object_groups.hh diff --git a/scribo/ChangeLog b/scribo/ChangeLog index 14d8305..854e523 100644 --- a/scribo/ChangeLog +++ b/scribo/ChangeLog @@ -1,5 +1,9 @@ 2009-08-24 Guillaume Lazzara &lt;lazzara(a)lrde.epita.fr&gt; + * filter/small_object_groups.hh: New filter. + +2009-08-24 Guillaume Lazzara &lt;lazzara(a)lrde.epita.fr&gt; + Various small fixes in Scribo. * extract/primitive/lines_h_thick.hh, diff --git a/scribo/filter/small_object_groups.hh b/scribo/filter/small_object_groups.hh new file mode 100644 index 0000000..7f10e1d --- /dev/null +++ b/scribo/filter/small_object_groups.hh @@ -0,0 +1,89 @@ +// Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE) +// +// This file is part of Olena. +// +// Olena is free software: you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation, version 2 of the License. +// +// Olena 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 Olena. If not, see <http://www.gnu.org/licenses/>. +// +// As a special exception, you may use this file as part of a free +// software project 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 SCRIBO_FILTER_SMALL_OBJECT_GROUPS_HH +# define SCRIBO_FILTER_SMALL_OBJECT_GROUPS_HH + +/// \file +/// +/// Remove small objects groups. + + +# include <mln/util/array.hh> + +namespace scribo +{ + + namespace filter + { + + using namespace mln; + + + /*! \brief Remove objects within a group with less than \p n + links. + + \param[in] parent_link Information about object links. + \param[in] n_links The minimum number of links per group. + + \return A function mapping an object id to a bool. It is set to + true if an object is part of a group with more than \p n_links + links. + */ + mln::util::array<bool> + small_object_groups(const mln::util::array<unsigned>& parent_link, + unsigned n_links); + + +# ifndef MLN_INCLUDE_ONLY + + + inline + mln::util::array<bool> + small_object_groups(const mln::util::array<unsigned>& parent_link, + unsigned n_links) + { + // Counting the number of objects per group. + mln::util::array<unsigned> group_size(parent_link.size(), 0); + for (unsigned i = 1; i < group_size.size(); ++i) + ++group_size[parent_link[i]]; + + mln::util::array<bool> f(parent_link.size()); + f(0) = true; + for (unsigned i = 1; i < f.size(); ++i) + f(i) = (group_size[parent_link[i]] >= n_links); + + return f; + } + + +# endif // ! MLN_INCLUDE_ONLY + + } // end of namespace scribo::filter + +} // end of namespace scribo + +#endif // ! SCRIBO_FILTER_SMALL_OBJECT_GROUPS_HH + -- 1.5.6.5