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gradient.hh
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25 
26 #ifndef MLN_MORPHO_GRADIENT_HH
27 # define MLN_MORPHO_GRADIENT_HH
28 
39 
40 # include <mln/morpho/includes.hh>
41 
42 
43 namespace mln
44 {
45 
46  namespace morpho
47  {
48 
52  template <typename I, typename W>
53  mln_concrete(I) gradient(const Image<I>& input, const Window<W>& win);
54 
55 
59  template <typename I, typename W>
60  mln_concrete(I) gradient_internal(const Image<I>& input, const Window<W>& win);
61 
62 
66  template <typename I, typename W>
67  mln_concrete(I) gradient_external(const Image<I>& input, const Window<W>& win);
68 
69 
70 
71 # ifndef MLN_INCLUDE_ONLY
72 
73 
74  template <typename I, typename W>
75  inline
76  mln_concrete(I) gradient(const Image<I>& input, const Window<W>& win)
77  {
78  trace::entering("morpho::gradient");
79  mln_precondition(exact(input).is_valid());
80  mln_precondition(! exact(win).is_empty());
81 
82  mln_concrete(I) output = morpho::minus(dilation(input, win),
83  erosion(input, win));
84 
85  mln_postcondition(test::positive(output));
86  trace::exiting("morpho::gradient");
87  return output;
88  }
89 
90 
91  template <typename I, typename W>
92  inline
93  mln_concrete(I) gradient_internal(const Image<I>& input, const Window<W>& win)
94  {
95  trace::entering("morpho::gradient_internal");
96  mln_precondition(exact(input).is_valid());
97  mln_precondition(! exact(win).is_empty());
98 
99  mln_concrete(I) output = morpho::minus(input,
100  erosion(input, win));
101 
102  mln_postcondition(test::positive(output));
103  trace::exiting("morpho::gradient_internal");
104  return output;
105  }
106 
107 
108  template <typename I, typename W>
109  inline
110  mln_concrete(I) gradient_external(const Image<I>& input, const Window<W>& win)
111  {
112  trace::entering("morpho::gradient_external");
113  mln_precondition(exact(input).is_valid());
114  mln_precondition(! exact(win).is_empty());
115 
116  mln_concrete(I) output = morpho::minus(dilation(input, win),
117  input);
118 
119  mln_postcondition(test::positive(output));
120  trace::exiting("morpho::gradient_external");
121  return output;
122  }
123 
124 # endif // ! MLN_INCLUDE_ONLY
125 
126  } // end of namespace mln::morpho
127 
128 } // end of namespace mln
129 
130 
131 #endif // ! MLN_MORPHO_GRADIENT_HH