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n_max.cc
1 // Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
6 // the terms of the GNU General Public License as published by the Free
7 // Software Foundation, version 2 of the License.
8 //
9 // Olena is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 // General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
16 //
17 // As a special exception, you may use this file as part of a free
18 // software project without restriction. Specifically, if other files
19 // instantiate templates or use macros or inline functions from this
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23 // exception does not however invalidate any other reasons why the
24 // executable file might be covered by the GNU General Public License.
25 
26 #include <mln/core/image/image2d.hh>
27 #include <mln/core/alias/neighb2d.hh>
28 #include <mln/value/int_u8.hh>
29 #include <mln/value/label_8.hh>
30 
31 #include <mln/labeling/flat_zones.hh>
32 #include <mln/labeling/compute.hh>
33 #include <mln/labeling/n_max.hh>
34 
35 #include <mln/fun/v2b/threshold.hh>
36 #include <mln/data/transform.hh>
37 
38 #include <mln/accu/math/count.hh>
39 
40 #include <mln/io/pgm/all.hh>
41 
42 #include "tests/data.hh"
43 
44 int main()
45 {
46  using namespace mln;
47  using value::int_u8;
48  using value::label_8;
49 
50  image2d<int_u8> lena = io::pgm::load<int_u8>(MLN_IMG_DIR "/tiny.pgm");
51 
53  label_8 nlabels;
54  image2d<label_8> labels = labeling::flat_zones(threshold, c4(), nlabels);
56 
57  util::array<unsigned> a = labeling::compute(a_, threshold, labels, nlabels);
58  util::array<label_8> arr_big = labeling::n_max<label_8>(a, 3);
59 
60  mln_assertion(arr_big[1] == 1u);
61  mln_assertion(arr_big[2] == 4u);
62  mln_assertion(arr_big[3] == 5u);
63 }