00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026 #ifndef MLN_MORPHO_THINNING_HH
00027 # define MLN_MORPHO_THINNING_HH
00028
00032
00033 # include <mln/morpho/hit_or_miss.hh>
00034 # include <mln/morpho/thickening.hh>
00035
00036 #include <mln/io/pgm/save.hh>
00037
00038
00039 namespace mln
00040 {
00041
00042 namespace morpho
00043 {
00044
00045
00049
00050 template <typename I, typename Wfg, typename Wbg>
00051 mln_concrete(I)
00052 thinning(const Image<I>& input,
00053 const Window<Wfg>& win_fg, const Window<Wbg>& win_bg);
00054
00055
00056 # ifndef MLN_INCLUDE_ONLY
00057
00058 namespace internal
00059 {
00060
00061 template <typename I, typename Wfg, typename Wbg>
00062 inline
00063 void
00064 thinning_tests(const Image<I>& input_,
00065 const Window<Wfg>& win_fg_,
00066 const Window<Wbg>& win_bg_)
00067 {
00068 const I& input = exact(input_);
00069 const Wfg& win_fg = exact(win_fg_);
00070 const Wbg& win_bg = exact(win_bg_);
00071
00072
00073 mln_precondition(input.is_valid());
00074 mln_precondition(win_fg.is_centered());
00075 mln_precondition(! win_bg.is_empty());
00076 mln_precondition((win_fg && win_bg).is_empty());
00077
00078
00079 (void) input_;
00080 (void) win_fg_;
00081 (void) win_bg_;
00082 }
00083
00084 }
00085
00086
00087 template <typename I, typename Wfg, typename Wbg>
00088 inline
00089 mln_concrete(I)
00090 thinning(const Image<I>& input,
00091 const Window<Wfg>& win_fg, const Window<Wbg>& win_bg)
00092 {
00093 trace::entering("morpho::thinning");
00094
00095
00096 internal::thinning_tests(input, win_fg, win_bg);
00097
00098 mln_concrete(I) output = morpho::minus( input,
00099 hit_or_miss(input, win_fg, win_bg) );
00100
00101 mln_postcondition( complementation( thickening( complementation(input),
00102 win_bg, win_fg ) ) == output);
00103 trace::exiting("morpho::thinning");
00104 return output;
00105 }
00106
00107 # endif // ! MLN_INCLUDE_ONLY
00108
00109 }
00110
00111 }
00112
00113
00114 #endif // ! MLN_MORPHO_THINNING_HH