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pgm_niblack_threshold_image.cc
1 // Copyright (C) 2010, 2011 EPITA Research and Development Laboratory
2 // (LRDE)
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25 // executable file might be covered by the GNU General Public License.
26 
27 #include <mln/io/pgm/all.hh>
28 
29 #include <scribo/binarization/niblack_threshold.hh>
30 #include <scribo/debug/usage.hh>
31 
32 const char *args_desc[][2] =
33 {
34  { "input.pgm", "A graylevel image." },
35  { "output.pgm", "A threshold image." },
36  { "w", "Window size (default 101)." },
37  { "k", "Niblack's formulae parameter (default -0.2)." },
38  {0, 0}
39 };
40 
41 
42 int main(int argc, char *argv[])
43 {
44  using namespace mln;
45 
46  if (argc != 5 && argc != 4 && argc != 3)
47  return scribo::debug::usage(argv,
48  "Compute a threshold image based on Niblack's algorithm.",
49  "input.pgm output.pgm <w> <k>",
50  args_desc);
51 
52  mln_trace("main");
53 
54  unsigned w;
55  if (argc >= 4)
56  w = atoi(argv[3]);
57  else
58  w = 101;
59 
60  double k;
61  if (argc >= 5)
62  k = atof(argv[4]);
63  else
64  k = -0.2;
65 
66  std::cout << "Using w=" << w << " and k=" << k << std::endl;
67 
69  io::pgm::load(input, argv[1]);
70 
72 
73 
74  io::pgm::save(out, argv[2]);
75 
76 
77 }