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mln/morpho/minus.hh
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26 
27 #ifndef MLN_MORPHO_MINUS_HH
28 # define MLN_MORPHO_MINUS_HH
29 
37 # include <mln/data/compare.hh>
38 # include <mln/logical/and_not.hh>
39 # include <mln/arith/minus.hh>
40 
41 
42 namespace mln
43 {
44 
45  namespace morpho
46  {
47 
54  template <typename I, typename J>
55  mln_concrete(I) minus(const Image<I>& lhs, const Image<J>& rhs);
56 
57 
58 # ifndef MLN_INCLUDE_ONLY
59 
60  namespace impl
61  {
62 
63  // Binary => morphology on sets.
64 
65  template <typename I, typename J>
66  inline
67  mln_concrete(I) minus_(trait::image::kind::logic,
68  const I& lhs, const J& rhs)
69  {
70  return logical::and_not(lhs, rhs);
71  }
72 
73  // Otherwise => morphology on functions.
74 
75  template <typename I, typename J>
76  inline
77  mln_concrete(I) minus_(trait::image::kind::any,
78  const I& lhs, const J& rhs)
79  {
80  return arith::minus<mln_value(I)>(lhs, rhs);
81  }
82 
83  } // end of namespace mln::morpho::impl
84 
85 
86  // Facades.
87 
88  template <typename I, typename J>
89  inline
90  mln_concrete(I)
91  minus(const Image<I>& lhs, const Image<J>& rhs)
92  {
93  mln_trace("morpho::minus");
94  mln_precondition(exact(rhs).domain() == exact(lhs).domain());
95 
96  mln_concrete(I) output = impl::minus_(mln_trait_image_kind(I)(),
97  exact(lhs), exact(rhs));
98 
99  return output;
100  }
101 
102 # endif // ! MLN_INCLUDE_ONLY
103 
104  } // end of namespace mln::morpho
105 
106 } // end of namespace mln
107 
108 
109 #endif // ! MLN_MORPHO_MINUS_HH