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singh_formula.hh
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26 
27 #ifndef SCRIBO_BINARIZATION_INTERNAL_SINGH_FORMULA_HH
28 # define SCRIBO_BINARIZATION_INTERNAL_SINGH_FORMULA_HH
29 
30 
35 
36 
37 // Setup default Singh's formula parameters values.
38 // These macros may be used in other variant of Singh's algorithms.
39 # define SCRIBO_DEFAULT_SINGH_K 0.06
40 
41 
42 #include <mln/core/alias/point2d.hh>
43 
44 // extern mln::image2d<bool> skewness_pbm;
45 
46 namespace scribo
47 {
48 
49  namespace binarization
50  {
51 
52  namespace internal
53  {
54 
55  using namespace mln;
56 
57  template <typename V>
59  {
60 
71  double operator()(const V& v, const double m_x_y, const double K) const;
72 
76  double operator()(const V& v, const double m_x_y) const;
77 
78  };
79 
80 
81 # ifndef MLN_INCLUDE_ONLY
82 
83  // bool b;
84  // double skewness_;
85 
86  template <typename V>
87  inline
88  double
89  singh_formula<V>::operator()(const V& v, const double m_x_y, const double K) const
90  {
91  double mean_dev = v - m_x_y;
92  return m_x_y * (1.0 + K * (mean_dev / (1 - mean_dev) - 1));
93  }
94 
95  template <typename V>
96  inline
97  double
98  singh_formula<V>::operator()(const V& v, const double m_x_y) const
99  {
100  return (*this)(v, m_x_y, SCRIBO_DEFAULT_SINGH_K);
101  }
102 
103 # endif // ! MLN_INCLUDE_ONLY
104 
105  } // end of namespace scribo::binarization::internal
106 
107  } // end of namespace scribo::binarization
108 
109 } // end of namespace scribo
110 
111 #endif // ! SCRIBO_BINARIZATION_INTERNAL_SINGH_FORMULA_HH