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An Image Processing Platform
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breadth_first_thinning.cc
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25 
29 
30 #include <mln/core/image/image2d.hh>
31 #include <mln/core/alias/neighb2d.hh>
32 
33 #include <mln/topo/skeleton/breadth_first_thinning.hh>
34 
35 #include <mln/topo/is_simple_point2d.hh>
36 #include <mln/topo/detach_point.hh>
37 
38 #include <mln/io/pbm/all.hh>
39 
40 #include "tests/data.hh"
41 
42 
43 int main()
44 {
45  using namespace mln;
46 
47  typedef image2d<bool> I;
48  typedef neighb2d N;
49 
50  // Add a border of (at least) 1 pixel, to a guarantee a meaningful
51  // result of the computation of connectivity numbers (called within
52  // is_simple_2d); indeed, this computation always expects each pixel
53  // to have 8 neighboring sites.
55 
56  I input = io::pbm::load(MLN_IMG_DIR "/small.pbm");
57 
58  // FIXME: Use a dual neighborhood instead?
59 
60  // Foreground neighborhood.
61  neighb2d nbh_fg = c4();
62  // Background neighborhood.
63  neighb2d nbh_bg = c8();
64 
65  // Simplicity criterion functor.
66  topo::is_simple_point2d<I, N> is_simple(nbh_fg, nbh_bg);
67  // Simple point detach procedure.
68  topo::detach_point<I> detach;
69 
70  I output = topo::skeleton::breadth_first_thinning(input, nbh_fg,
71  is_simple,
72  detach);
73  io::pbm::save(output, "breadth_first_thinning-small.pbm");
74 }