[Olena-patches] last-svn-commit-654-g47dbda4 Add merge::components routine.

--- scribo/scribo/primitive/merge/components.hh | 121 +++++++++++++++++++++++++++ 1 files changed, 121 insertions(+), 0 deletions(-) create mode 100644 scribo/scribo/primitive/merge/components.hh diff --git a/scribo/scribo/primitive/merge/components.hh b/scribo/scribo/primitive/merge/components.hh new file mode 100644 index 0000000..7570d2e --- /dev/null +++ b/scribo/scribo/primitive/merge/components.hh @@ -0,0 +1,121 @@ +// Copyright (C) 2010 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. + +/// \file +/// +/// + +#ifndef SCRIBO_PRIMITIVE_MERGE_COMPONENTS_HH +# define SCRIBO_PRIMITIVE_MERGE_COMPONENTS_HH + +# include <mln/core/image/vmorph/fun_image.hh> + + +namespace scribo +{ + + namespace primitive + { + + namespace merge + { + + using namespace mln; + + +# ifndef MLN_INCLUDE_ONLY + + namespace internal + { + + template <typename V> + struct rebase_label : mln::Function_v2v<rebase_label<V> > + { + typedef V result; + + rebase_label() + : base_label_(0) + {} + + rebase_label(const V& base_label) + : base_label_(base_label) + {} + + V operator()(const V& v) const + { + if (v) + return unsigned(base_label_) + unsigned(v); + return literal::zero; + } + + + V base_label_; + }; + + + } // end of namespace scribo::primitive::merge + + + template <typename L> + component_set<L> + components(const component_set<L>& lhs, const component_set<L>& rhs) + { + trace::entering("scribo::primitive::merge::components"); + + const L& lhs_lbl = lhs.labeled_image(); + const L& rhs_lbl = rhs.labeled_image(); + + typedef mln_value(L) V; + + + V nlabels = unsigned(lhs.nelements()) + unsigned(rhs.nelements()); + + // Merge labeled images. + // + // Rebase labeling in the second image, according to the + // number of labels in the first one. + // + L lbl_merge = duplicate(lhs_lbl); + + internal::rebase_label<V> f(lhs.nelements()); + fun_image<internal::rebase_label<V>, L> fima(f, rhs_lbl); + data::fill((lbl_merge | (pw::value(lbl_merge) == pw::cst(0))).rw(), fima); + + component_set<L> output(lbl_merge, nlabels); + + trace::exiting("scribo::primitive::merge::components"); + return output; + } + +# endif // ! MLN_INCLUDE_ONLY + + } // end of namespace scribo::primitive::merge + + } // end of namespace scribo::primitive + +} // end of namespace scribo + + +#endif // ! SCRIBO_PRIMITIVE_MERGE_COMPONENTS_HH -- 1.5.6.5