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object_groups_mean_width.hh
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26 
27 #ifndef SCRIBO_ESTIM_OBJECT_GROUPS_MEAN_WIDTH_HH
28 # define SCRIBO_ESTIM_OBJECT_GROUPS_MEAN_WIDTH_HH
29 
30 
34 
35 
36 # include <mln/util/array.hh>
37 # include <scribo/core/object_groups.hh>
38 # include <scribo/core/macros.hh>
39 
40 
41 namespace scribo
42 {
43 
44  namespace estim
45  {
46 
47  using namespace mln;
48 
56  template <typename L>
58  object_groups_mean_width(const object_groups<L>& groups);
59 
60 
61 
62 # ifndef MLN_INCLUDE_ONLY
63 
64 
65  template <typename L>
67  object_groups_mean_width(const object_groups<L>& groups)
68  {
69  mln_trace("scribo::estim::object_groups_mean_width");
70 
71  mln_precondition(groups.is_valid());
72 
73  const component_set<L>& components = groups.components();
74 
75  mln::util::array<float> output(groups.nelements(), 0.0);
76  for_all_groups(g, groups)
77  for_all_elements(e, groups(g).component_ids())
78  output(g) += components(groups(g).component_ids()(e)).bbox().width();
79 
80  output(0) = 0;
81  for_all_groups(g, groups)
82  if (groups(g).is_valid())
83  output(g) /= groups(g).card();
84  else
85  output(g) = 0;
86 
87  return output;
88  }
89 
90 
91 # endif // ! MLN_INCLUDE_ONLY
92 
93 
94  } // end of namespace scribo::estim
95 
96 } // end of namespace scribo
97 
98 #endif // ! SCRIBO_ESTIM_OBJECT_GROUPS_MEAN_WIDTH_HH