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An Image Processing Platform
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pgm27.cc
1 // Copyright (C) 2007, 2008, 2009, 2010 EPITA Research and Development
2 // Laboratory (LRDE)
3 //
4 // This file is part of Olena.
5 //
6 // Olena is free software: you can redistribute it and/or modify it under
7 // the terms of the GNU General Public License as published by the Free
8 // Software Foundation, version 2 of the License.
9 //
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12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
14 //
15 // You should have received a copy of the GNU General Public License
16 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
17 //
18 // As a special exception, you may use this file as part of a free
19 // software project without restriction. Specifically, if other files
20 // instantiate templates or use macros or inline functions from this
21 // file, or you compile this file and link it with other files to produce
22 // an executable, this file does not by itself cause the resulting
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24 // exception does not however invalidate any other reasons why the
25 // executable file might be covered by the GNU General Public License.
26 
27 #include <mln/core/image/image2d.hh>
28 
29 #include <mln/value/int_u8.hh>
30 
31 #include <mln/io/pgm/load.hh>
32 #include <mln/io/pgm/save.hh>
33 
34 #include <mln/data/transform.hh>
35 #include <mln/data/compare.hh>
36 
37 #include "tests/data.hh"
38 
39 
40 using namespace mln;
41 
42 struct to27bits : mln::Function_v2v<to27bits>
43 {
44 
45  typedef value::int_u<27> result;
46  result operator()(value::int_u8 v) const
47  {
48  result ret(v * 524288);
49  return ret;
50  }
51 };
52 
53 struct to8bits : mln::Function_v2v<to8bits>
54 {
55 
56  typedef value::int_u8 result;
57  result operator()(value::int_u<27> v) const
58  {
59  result ret(v / 524288);
60  return ret;
61  }
62 };
63 
64 
65 int main()
66 {
67  using namespace mln;
68  using value::int_u8;
69  using value::int_u;
70  typedef value::int_u<27> int_u27;
71 
72  image2d<int_u8> lena = io::pgm::load<int_u8>(MLN_IMG_DIR "/lena.pgm");
73  image2d<int_u27> out(lena.domain());
74 
75  out = data::transform(lena, to27bits());
76  io::pgm::save(out, "pgm27-out27.pgm");
77 
78  image2d<int_u27> lena2;
79  io::pgm::load(lena2, "pgm27-out27.pgm");
80 
81  image2d<int_u8> out2(lena.domain());
82  out2 = data::transform(lena2, to8bits());
83  io::pgm::save(out2, "pgm27-out8.pgm");
84  assert(out2 == lena);
85 
86 }