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gaussian_subsampling.hh

00001 // Copyright (C) 2008, 2009, 2011 EPITA Research and Development
00002 // Laboratory (LRDE)
00003 //
00004 // This file is part of Olena.
00005 //
00006 // Olena is free software: you can redistribute it and/or modify it under
00007 // the terms of the GNU General Public License as published by the Free
00008 // Software Foundation, version 2 of the License.
00009 //
00010 // Olena is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 // General Public License for more details.
00014 //
00015 // You should have received a copy of the GNU General Public License
00016 // along with Olena.  If not, see <http://www.gnu.org/licenses/>.
00017 //
00018 // As a special exception, you may use this file as part of a free
00019 // software project without restriction.  Specifically, if other files
00020 // instantiate templates or use macros or inline functions from this
00021 // file, or you compile this file and link it with other files to produce
00022 // an executable, this file does not by itself cause the resulting
00023 // executable to be covered by the GNU General Public License.  This
00024 // exception does not however invalidate any other reasons why the
00025 // executable file might be covered by the GNU General Public License.
00026 
00027 #ifndef MLN_SUBSAMPLING_GAUSSIAN_SUBSAMPLING_HH
00028 # define MLN_SUBSAMPLING_GAUSSIAN_SUBSAMPLING_HH
00029 
00033 
00034 # include <mln/geom/ncols.hh>
00035 # include <mln/geom/nrows.hh>
00036 
00037 
00038 # include <mln/linear/gaussian.hh>
00039 # include <mln/subsampling/subsampling.hh>
00040 
00041 
00042 
00043 namespace mln
00044 {
00045 
00046   namespace subsampling
00047   {
00048 
00050     template <typename I>
00051     inline
00052     mln_concrete(I)
00053     gaussian_subsampling(const Image<I>& input, float sigma,
00054                          const mln_dpsite(I)& first_p,
00055                          const mln_deduce(I, site, coord)& gap);
00056 
00057 # ifndef MLN_INCLUDE_ONLY
00058 
00059 
00060     template <typename I>
00061     inline
00062     mln_concrete(I)
00063     gaussian_subsampling(const Image<I>& input, float sigma,
00064                          const mln_dpsite(I)& first_p,
00065                          const mln_deduce(I, site, coord)& gap)
00066     {
00067       trace::entering("subsampling::gaussian_subsampling");
00068       mln_precondition(exact(input).is_valid());
00069 
00070       (void) sigma;
00071 
00072       mln_concrete(I) temp(exact(input).domain());
00073       mln_concrete(I) output(geom::nrows(input) / gap,
00074                              geom::ncols(input) / gap); //FIXME : image2d only
00075 
00076       linear::gaussian(input, 0.1, temp);
00077       output = impl::subsampling_(exact(temp), first_p, gap);
00078 
00079       trace::exiting("subsampling::gaussian_subsampling");
00080       return output;
00081     }
00082 
00083 # endif // ! MLN_INCLUDE_ONLY
00084 
00085   } // end of namespace mln::subsampling
00086 
00087 } // end of namespace mln
00088 
00089 
00090 #endif // ! MLN_SUBSAMPLING_GAUSSIAN_SUBSAMPLING_HH

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