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foreground.cc
1 // Copyright (C) 2007, 2008, 2009, 2010 EPITA Research and Development
2 // Laboratory (LRDE)
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26 
27 #include <mln/core/image/image2d.hh>
28 #include <mln/core/var.hh>
29 #include <mln/io/pbm/load.hh>
30 #include <mln/core/alias/neighb2d.hh>
31 #include <mln/data/compare.hh>
32 #include <mln/labeling/foreground.hh>
33 
34 #include "tests/data.hh"
35 
36 
37 int main()
38 {
39  using namespace mln;
40 
41  typedef image2d<bool> I;
42  neighb2d nbh = c4();
43 
44  I pic = io::pbm::load(MLN_IMG_DIR "/picasso.pbm");
45  image2d<unsigned> out, ref;
46 
47  unsigned n;
48  out = labeling::foreground(pic, nbh, n); // Calls the fastest 'video'
49  // version.
50  mln_assertion(n == 33);
51 
52  {
53  // Note that labeling::foreground actually is labeling::value
54  // which calls canvas::labeling_video and its generic dispatch
55  // leads to canvas::impl::generic::labeling.
56 
57  labeling::impl::value_functor<I,unsigned> f(pic, true);
58 
59  unsigned n_;
60  ref = canvas::labeling::impl::generic::labeling(pic, nbh, n_,
61  pic.domain(),
62  f);
63  mln_invariant(n_ == n);
64  mln_invariant(ref == out);
65  }
66 
67 }