00001 // Copyright (C) 2011 EPITA Research and Development Laboratory (LRDE) 00002 // 00003 // This file is part of Olena. 00004 // 00005 // Olena is free software: you can redistribute it and/or modify it under 00006 // the terms of the GNU General Public License as published by the Free 00007 // Software Foundation, version 2 of the License. 00008 // 00009 // Olena is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 // General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00016 // 00017 // As a special exception, you may use this file as part of a free 00018 // software project without restriction. Specifically, if other files 00019 // instantiate templates or use macros or inline functions from this 00020 // file, or you compile this file and link it with other files to produce 00021 // an executable, this file does not by itself cause the resulting 00022 // executable to be covered by the GNU General Public License. This 00023 // exception does not however invalidate any other reasons why the 00024 // executable file might be covered by the GNU General Public License. 00025 00026 #ifndef MLN_FUN_V2V_RGB_TO_LUMA_HH 00027 # define MLN_FUN_V2V_RGB_TO_LUMA_HH 00028 00029 # include <mln/value/rgb.hh> 00030 00031 namespace mln 00032 { 00033 00034 namespace fun 00035 { 00036 00037 namespace v2v 00038 { 00039 00040 template <typename T_luma> 00041 struct rgb_to_luma : public Function_v2v< rgb_to_luma<T_luma> > 00042 { 00043 typedef T_luma result; 00044 00045 template <typename T_rgb> 00046 T_luma operator()(const T_rgb& rgb) const; 00047 00048 }; 00049 00050 00051 # ifndef MLN_INCLUDE_ONLY 00052 00053 template <typename T_luma> 00054 template <typename T_rgb> 00055 inline 00056 T_luma 00057 rgb_to_luma<T_luma>::operator()(const T_rgb& rgb) const 00058 { 00059 float luma = 0.299 * rgb.red() + 0.587 * rgb.green() + 0.114 * rgb.blue(); 00060 return unsigned(luma + 0.49999); 00061 } 00062 00063 00064 # endif // !MLN_INCLUDE_ONLY 00065 00066 } // end of namespace fun::v2v 00067 00068 } // end of namespace fun 00069 00070 } // end of namespace mln 00071 00072 #endif // ! MLN_FUN_V2V_RGB_TO_LUMA_HH
1.7.1