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gradient.hh
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26 
27 #ifndef MLN_MORPHO_GRADIENT_HH
28 # define MLN_MORPHO_GRADIENT_HH
29 
40 
41 # include <mln/morpho/includes.hh>
42 
43 
44 namespace mln
45 {
46 
47  namespace morpho
48  {
49 
56  template <typename I, typename W>
57  mln_concrete(I) gradient(const Image<I>& input, const Window<W>& win);
58 
59 
66  template <typename I, typename W>
67  mln_concrete(I) gradient_internal(const Image<I>& input, const Window<W>& win);
68 
69 
76  template <typename I, typename W>
77  mln_concrete(I) gradient_external(const Image<I>& input, const Window<W>& win);
78 
79 
80 
81 # ifndef MLN_INCLUDE_ONLY
82 
83 
84  template <typename I, typename W>
85  inline
86  mln_concrete(I) gradient(const Image<I>& input, const Window<W>& win)
87  {
88  mln_trace("morpho::gradient");
89  mln_precondition(exact(input).is_valid());
90  mln_precondition(! exact(win).is_empty());
91 
92  mln_concrete(I) output = morpho::minus(dilation(input, win),
93  erosion(input, win));
94 
95  mln_postcondition(test::positive(output));
96  return output;
97  }
98 
99 
100  template <typename I, typename W>
101  inline
102  mln_concrete(I) gradient_internal(const Image<I>& input, const Window<W>& win)
103  {
104  mln_trace("morpho::gradient_internal");
105  mln_precondition(exact(input).is_valid());
106  mln_precondition(! exact(win).is_empty());
107 
108  mln_concrete(I) output = morpho::minus(input,
109  erosion(input, win));
110 
111  mln_postcondition(test::positive(output));
112  return output;
113  }
114 
115 
116  template <typename I, typename W>
117  inline
118  mln_concrete(I) gradient_external(const Image<I>& input, const Window<W>& win)
119  {
120  mln_trace("morpho::gradient_external");
121  mln_precondition(exact(input).is_valid());
122  mln_precondition(! exact(win).is_empty());
123 
124  mln_concrete(I) output = morpho::minus(dilation(input, win),
125  input);
126 
127  mln_postcondition(test::positive(output));
128  return output;
129  }
130 
131 # endif // ! MLN_INCLUDE_ONLY
132 
133  } // end of namespace mln::morpho
134 
135 } // end of namespace mln
136 
137 
138 #endif // ! MLN_MORPHO_GRADIENT_HH