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labeling/value.cc
1 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
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5 // Olena is free software: you can redistribute it and/or modify it under
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7 // Software Foundation, version 2 of the License.
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15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
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19 // instantiate templates or use macros or inline functions from this
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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/io/pgm/load.hh>
30 
31 #include <mln/accu/math/count.hh>
32 #include <mln/accu/compute.hh>
33 #include <mln/labeling/value.hh>
34 #include <mln/data/paste.hh>
35 #include <mln/pw/all.hh>
36 #include <mln/core/image/dmorph/image_if.hh>
37 
38 #include <mln/debug/println.hh>
39 
40 #include "tests/data.hh"
41 
42 
43 int main()
44 {
45  using namespace mln;
46  using value::int_u8;
47 
48  image2d<int_u8> lena = io::pgm::load<int_u8>(MLN_IMG_DIR "/tiny.pgm");
49  image2d<bool> lvl(lena.domain());
50 
51  unsigned n, npixels = 0;
52  for (unsigned l = 0; l <= 255; ++l)
53  {
54  image2d<unsigned> labels = labeling::value(lena, l, c4(), n);
55  unsigned npix =
57  labels | (pw::value(labels) != pw::cst(0u)));
58  npixels += npix;
59  }
60  mln_assertion(npixels == lena.nsites());
61 }