* doc/examples/mk_graph.cc: new example. --- milena/ChangeLog | 6 +++ milena/doc/examples/mk_graph.cc | 93 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 99 insertions(+), 0 deletions(-) create mode 100644 milena/doc/examples/mk_graph.cc diff --git a/milena/ChangeLog b/milena/ChangeLog index 9275628..9ca0020 100644 --- a/milena/ChangeLog +++ b/milena/ChangeLog @@ -1,5 +1,11 @@ 2008-11-19 Guillaume Lazzara <z@lrde.epita.fr> + Add an example using make::graph. + + * doc/examples/mk_graph.cc: new example. + +2008-11-19 Guillaume Lazzara <z@lrde.epita.fr> + Revamp labeling::compute. * mln/labeling/compute.hh: Add compute_dispatch and compute_tests. diff --git a/milena/doc/examples/mk_graph.cc b/milena/doc/examples/mk_graph.cc new file mode 100644 index 0000000..18b7a86 --- /dev/null +++ b/milena/doc/examples/mk_graph.cc @@ -0,0 +1,93 @@ +// Copyright (C) 2008 EPITA Research and Development Laboratory (LRDE) +// +// 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, 51 Franklin Street, Fifth Floor, +// 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. + +/// \file doc/examples/mk_graph.cc +/// +/// This example shows how to create a graph from an influence zone image + +# include <mln/essential/2d.hh> + +# include <mln/core/site_set/p_vertices.hh> +# include <mln/core/site_set/p_edges.hh> + +# include <mln/debug/colorize.hh> +# include <mln/debug/draw_graph.hh> + +# include <mln/make/graph.hh> + +# include <mln/transform/influence_zone_geodesic.hh> + +# include <mln/util/graph.hh> + + +int main(int argc, char *argv[]) +{ + using namespace mln; + using value::int_u8; + + if (argc < 2) + { + std::cout << "Usage: " << argv[0] << " <image.pbm>" << std::endl; + return 1; + } + + image2d<bool> ima = io::pbm::load(argv[1]); + logical::not_inplace(ima); + + // Create a label image and compute the influence zones. + int_u8 nlabels; + image2d<int_u8> lbl = labeling::blobs(ima, c8(), nlabels); + io::ppm::save(debug::colorize< image2d<value::rgb8> >(lbl, nlabels), + "1_blobs.ppm"); + image2d<int_u8> iz = transform::influence_zone_geodesic(lbl, + c8(), + lbl.ncols()); + io::ppm::save(debug::colorize< image2d<value::rgb8> >(iz, nlabels), + "2_influence_zone_geodesic.ppm"); + + /// Make a graph from the influence zone image. + util::graph g = make::graph(iz, nlabels); + + // Use the center of each bbox component as vertex in the graph. + typedef fun::i2v::array<point2d> i2v_t; + util::array<point2d> centers = labeling::compute(accu::center<point2d>(), iz, nlabels); + i2v_t f = convert::to<i2v_t>(centers); + p_vertices<util::graph, i2v_t> pv(g, f); + + // Find lines (sites) associated to edges. + typedef fun::i2v::array<p_line2d> i2e_t; + util::array<p_line2d> lines; + mln_edge_iter_(util::graph) e(g); + for_all(e) + lines.append(p_line2d(f(e.v1()), f(e.v2()))); + p_edges<util::graph, i2e_t> pe(g, convert::to<i2e_t>(lines)); + + // Draw graph. + image2d<value::rgb8> out(ima.domain()); + debug::draw_graph(out, pv, literal::red, literal::green); + io::ppm::save(out, "3_graph.ppm"); +} -- 1.5.6.5