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labeling/blobs.hh
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26 
27 #ifndef MLN_LABELING_BLOBS_HH
28 # define MLN_LABELING_BLOBS_HH
29 
38 
39 # include <mln/core/concept/image.hh>
40 # include <mln/core/concept/neighborhood.hh>
41 
42 # include <mln/canvas/labeling/blobs.hh>
43 
44 
45 namespace mln
46 {
47 
48  namespace labeling
49  {
50 
64  //
65  template <typename I, typename N, typename L>
66  mln_ch_value(I, L)
67  blobs(const Image<I>& input, const Neighborhood<N>& nbh,
68  L& nlabels);
69 
70 
71 # ifndef MLN_INCLUDE_ONLY
72 
73 
74  namespace internal
75  {
76 
81  template <typename L>
82  struct dummy_functor
83  {
84  void init() {}
85 
86  void new_label(const mln_value(L)&) {}
87 
88  void process_p(const mln_site(L)&) {}
89 
90  void process_n(const mln_site(L)&) {}
91 
92  void finalize() {}
93  };
94 
95  } // end of namespace mln::labeling::internal
96 
97 
98 
99  // Facade.
100 
101  template <typename I, typename N, typename L>
102  inline
103  mln_ch_value(I, L)
104  blobs(const Image<I>& input_, const Neighborhood<N>& nbh_,
105  L& nlabels)
106  {
107  mln_trace("labeling::blobs");
108  mlc_equal(mln_trait_image_kind(I),
109  mln::trait::image::kind::binary)::check();
110  const I& input = exact(input_);
111  const N& nbh = exact(nbh_);
112  mln_precondition(input.is_valid());
113 
114  typedef mln_ch_value(I,L) out_t;
115  internal::dummy_functor<out_t> functor;
116  out_t
117  output = canvas::labeling::blobs(input, nbh, nlabels, functor);
118 
119  return output;
120  }
121 
122 # endif // ! MLN_INCLUDE_ONLY
123 
124  } // end of namespace mln::labeling
125 
126 } // end of namespace mln
127 
128 
129 #endif // ! MLN_LABELING_BLOBS_HH