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p_vertices_with_mass_centers.hh
1 // Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE)
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25 
26 #ifndef MLN_MAKE_P_VERTICES_WITH_MASS_CENTERS_HH
27 # define MLN_MAKE_P_VERTICES_WITH_MASS_CENTERS_HH
28 
34 
35 
36 # include <mln/core/concept/image.hh>
37 # include <mln/core/concept/graph.hh>
38 # include <mln/core/site_set/p_vertices.hh>
39 
40 # include <mln/labeling/compute.hh>
41 
42 # include <mln/accu/center.hh>
43 
44 # include <mln/fun/i2v/array.hh>
45 
46 
47 namespace mln
48 {
49 
50  namespace make
51  {
52 
63  //
64  template <typename W, typename G>
65  inline
66  p_vertices<G, fun::i2v::array<mln_site(W)> >
67  p_vertices_with_mass_centers(const Image<W>& wst_,
68  const Graph<G>& g_);
69 
70 
71 # ifndef MLN_INCLUDE_ONLY
72 
73 
74  template <typename W, typename G>
75  inline
76  p_vertices<G, fun::i2v::array<mln_site(W)> >
77  p_vertices_with_mass_centers(const Image<W>& wst_,
78  const Graph<G>& g_)
79  {
80  mln_trace("make::p_vertices_with_mass_centers");
81 
82  const W& wst = exact(wst_);
83  const G& g = exact(g_);
84  mln_precondition(wst.is_valid());
85  mln_precondition(g.is_valid());
86 
87  typedef mln_site(W) P;
88  typedef fun::i2v::array<P> vertex_sites_t;
89 
90  // nbasins does not include the background label.
91  mln_value(W) nbasins = g.v_nmax() - 1;
92  vertex_sites_t vertex_sites;
93  convert::from_to(labeling::compute(accu::center<P>(), wst, nbasins),
94  vertex_sites);
95 
96  p_vertices<G, vertex_sites_t> pv(g, vertex_sites);
97 
98  return pv;
99  }
100 
101 # endif // ! MLN_INCLUDE_ONLY
102 
103  } // end of namespace mln::make
104 
105 } // end of namespace mln
106 
107 #endif // ! MLN_MAKE_P_VERTICES_WITH_MASS_CENTERS_HH