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gaussian_subsampling.hh
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26 
27 #ifndef MLN_SUBSAMPLING_GAUSSIAN_SUBSAMPLING_HH
28 # define MLN_SUBSAMPLING_GAUSSIAN_SUBSAMPLING_HH
29 
33 
34 # include <mln/geom/ncols.hh>
35 # include <mln/geom/nrows.hh>
36 
37 
38 # include <mln/linear/gaussian.hh>
39 # include <mln/subsampling/subsampling.hh>
40 
41 
42 
43 namespace mln
44 {
45 
46  namespace subsampling
47  {
48 
50  template <typename I>
51  inline
52  mln_concrete(I)
53  gaussian_subsampling(const Image<I>& input, float sigma,
54  const mln_dpsite(I)& first_p,
55  const mln_deduce(I, site, coord)& gap);
56 
57 # ifndef MLN_INCLUDE_ONLY
58 
59 
60  template <typename I>
61  inline
62  mln_concrete(I)
63  gaussian_subsampling(const Image<I>& input, float sigma,
64  const mln_dpsite(I)& first_p,
65  const mln_deduce(I, site, coord)& gap)
66  {
67  trace::entering("subsampling::gaussian_subsampling");
68  mln_precondition(exact(input).is_valid());
69 
70  (void) sigma;
71 
72  mln_concrete(I) temp(exact(input).domain());
73  mln_concrete(I) output(geom::nrows(input) / gap,
74  geom::ncols(input) / gap); //FIXME : image2d only
75 
76  linear::gaussian(input, 0.1, temp);
77  output = impl::subsampling_(exact(temp), first_p, gap);
78 
79  trace::exiting("subsampling::gaussian_subsampling");
80  return output;
81  }
82 
83 # endif // ! MLN_INCLUDE_ONLY
84 
85  } // end of namespace mln::subsampling
86 
87 } // end of namespace mln
88 
89 
90 #endif // ! MLN_SUBSAMPLING_GAUSSIAN_SUBSAMPLING_HH