Add rbg_to_int_u function.

	* mln/fun/v2v/all.hh: Include the new header.

	* mln/fun/v2v/rgb_to_int_u.hh: New.

milena/ChangeLog

+2009-12-14  Guillaume Lazzara  <z@lrde.epita.fr>
+
+	Add rbg_to_int_u function.
+
+	* mln/fun/v2v/all.hh: Include the new header.
+
+	* mln/fun/v2v/rgb_to_int_u.hh: New.
+
 2009-12-14  Guillaume Lazzara  <z@lrde.epita.fr>
 	Add an antialiased subsampling.

milena/mln/fun/v2v/all.hh

@@ -60,6 +60,7 @@ namespace mln
 # include <mln/fun/v2v/linear.hh>
 # include <mln/fun/v2v/norm.hh>
 # include <mln/fun/v2v/projection.hh>
+# include <mln/fun/v2v/rgb_to_int_u.hh>
 //<<lrde
 # include <mln/fun/v2v/rgb_to_hsi.hh>
 # include <mln/fun/v2v/rgb_to_hsl.hh>

milena/mln/fun/v2v/rgb_to_int_u.hh

+// Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE)
+//
+// This file is part of Olena.
+//
+// Olena is free software: you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation, version 2 of the License.
+//
+// Olena is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
+//
+// As a special exception, you may use this file as part of a free
+// software project without restriction.  Specifically, if other files
+// instantiate templates or use macros or inline functions from this
+// file, or you compile this file and link it with other files to produce
+// an executable, this file does not by itself cause the resulting
+// executable to be covered by the GNU General Public License.  This
+// exception does not however invalidate any other reasons why the
+// executable file might be covered by the GNU General Public License.
+
+
+#ifndef MLN_FUN_V2V_RGB_TO_INT_U_HH
+# define MLN_FUN_V2V_RGB_TO_INT_U_HH
+
+namespace mln
+{
+
+  namespace fun
+  {
+
+    namespace v2v
+    {
+
+      template <unsigned n>
+      struct rgb_to_int_u : Function_v2v< rgb_to_int_u<n> >
+      {
+	typedef value::int_u<n> result;
+
+	result operator()(const value::rgb<n>& c) const;
+      };
+
+# ifndef MLN_INCLUDE_ONLY
+
+      template <unsigned n>
+      typename rgb_to_int_u<n>::result
+      rgb_to_int_u<n>::operator()(const value::rgb<n>& c) const
+      {
+	return (c.red() + c.green() + c.blue()) / 3;
+      }
+
+# endif // ! MLN_INCLUDE_ONLY
+
+    } // end of namespace mln::fun::v2v
+
+  } // end of namespace mln::fun
+
+} // end of namespace mln
+
+#endif // ! MLN_FUN_V2V_RGB_TO_INT_U_HH