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make_edge_image.hh
1 // Copyright (C) 2009, 2013 EPITA Research and Development Laboratory (LRDE)
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25 
26 #ifndef MLN_WORLD_INTER_PIXEL_DIM2_MAKE_EDGE_IMAGE_HH
27 # define MLN_WORLD_INTER_PIXEL_DIM2_MAKE_EDGE_IMAGE_HH
28 
32 
33 # include <mln/core/image/image2d.hh>
34 # include <mln/core/image/dmorph/extension_ima.hh>
35 # include <mln/core/image/dmorph/image_if.hh>
36 
37 # include <mln/core/routine/extend.hh>
38 
39 # include <mln/world/inter_pixel/neighb2d.hh>
40 # include <mln/world/inter_pixel/dim2/is_edge.hh>
41 # include <mln/data/fill.hh>
42 
43 namespace mln
44 {
45 
46  namespace world
47  {
48 
49  namespace inter_pixel
50  {
51 
52  namespace dim2
53  {
54 
55  template <typename I, typename F>
56  mln_concrete(I)
57  make_edge_image(const Image<I>& input_, const Function_vv2v<F>& f_)
58  {
59  mln_trace("world::inter_pixel::dim2::make_edge_image");
60 
61  const I& input = exact(input_);
62  const F& f = exact(f_);
63  mln_precondition(input.is_valid());
64 
67  edges_t edges = input | is_edge();
68  typedef extension_ima<const edges_t,const I> edges_ext_t;
69  edges_ext_t edges_ext = extend(edges, input);
70 
71  mln_piter(edges_ext_t) p(edges_ext.domain());
72  dbl_neighb2d nbh = e2v();
73  mln_niter(dbl_neighb2d) n(nbh, p);
74  mln_value(I) vs[2];
75 
76  mln_concrete(I) output;
77  initialize(output, input);
78  data::fill(output, literal::zero);
79 
80  for_all(p)
81  {
82  unsigned i = 0;
83  for_all(n)
84  {
85  mln_assertion(i < 2);
86  vs[i++] = input(n);
87  }
88  output(p) = f(vs[0], vs[1]);
89  }
90 
91  return output;
92  }
93 
94  } // end of namespace mln::world::inter_pixel::dim2
95 
96  } // end of namespace mln::world::inter_pixel
97 
98  } // end of namespace mln::world
99 
100 } // end of namespace mln
101 
102 #endif // ! MLN_WORLD_INTER_PIXEL_DIM2_MAKE_EDGE_IMAGE_HH