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elementary/gradient.cc
1 // Copyright (C) 2008, 2009 EPITA Research and Development Laboratory (LRDE)
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3 // This file is part of Olena.
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19 // instantiate templates or use macros or inline functions from this
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25 
26 #include <mln/core/image/image2d.hh>
27 #include <mln/core/image/dmorph/sub_image.hh>
28 #include <mln/core/alias/neighb2d.hh>
29 #include <mln/core/var.hh>
30 #include <mln/value/int_u8.hh>
31 
32 #include <mln/debug/iota.hh>
33 #include <mln/debug/println.hh>
34 
35 #include <mln/morpho/elementary/gradient.hh>
36 
37 int main()
38 {
39  using namespace mln;
40  using value::int_u8;
41 
42  image2d<int_u8> ima(3, 3, 0);
43  debug::iota(ima);
44 
45  {
46  int_u8 ref_[9] = { 3, 4, 4,
47  6, 6, 6,
48  4, 4, 3 };
49  image2d<int_u8> ref = make::image2d(ref_);
50 
51  image2d<int_u8> gra = morpho::elementary::gradient(ima, c4());
52  mln_assertion(gra == ref);
53  }
54 
55  {
56  bool ref_[9] = { 0, 1, 1,
57  1, 1, 1,
58  1, 0, 0 };
59  image2d<bool> ref = make::image2d(ref_);
60 
61  image2d<bool> msk(3, 3, 0);
62  data::fill(msk, pw::value(ima) >= pw::cst(5u));
63 
64  image2d<bool> gra = morpho::elementary::gradient(msk, c4());
65 
66  mln_assertion(gra == ref);
67  }
68 
69 }