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relabel.cc
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26 
27 #include <mln/core/image/image2d.hh>
28 #include <mln/labeling/relabel.hh>
29 #include <mln/value/label_16.hh>
30 
31 
32 struct not_to_remove : public mln::Function_v2b< not_to_remove >
33 {
34  bool operator()(const mln::value::label_16& l) const
35  {
36  return l < mln::value::label_16(3);
37  }
38 };
39 
40 
41 bool is_valid(const mln::value::label_16& l)
42 {
43  return l == 0u|| l == 1u || l == 2u;
44 }
45 
46 
47 
48 int main()
49 {
50  using namespace mln;
51  using value::label_16;
52 
53  label_16 vals[6][5] = {
54  {0, 1, 1, 0, 0},
55  {0, 1, 1, 4, 0},
56  {0, 0, 0, 0, 0},
57  {2, 2, 0, 3, 0},
58  {2, 5, 3, 3, 3},
59  {2, 5, 5, 0, 0}
60  };
61 
62  image2d<label_16> lbl = make::image(vals);
63  label_16 nlabels = 5;
64 
65 
66  {
67  label_16 new_nlabels;
69  nlabels,
70  new_nlabels,
71  not_to_remove());
72  mln_assertion(new_nlabels == 2u);
73  mln_piter_(image2d<label_16>) p(lbl2.domain());
74  for_all(p)
75  mln_assertion(is_valid(lbl2(p)));
76  }
77 
78  {
80  nlabels,
81  not_to_remove());
82  mln_piter_(image2d<label_16>) p(lbl.domain());
83  for_all(p)
84  mln_assertion(is_valid(lbl(p)));
85  }
86 }