function?[databasehandle]?=?add_features_db（?im?pos?scale?orient?desc?existing_database?）
if?exist（‘existing_database‘）
????????database?=?existing_database;
else
????????database.pos?=?[];
????????database.scale?=?[];
????????database.orient?=?[];
????????database.desc?=?[];
????????database.index?=?[];
????????database.im?=?{};
????????database.num_im?=?0;
end
????????database.num_im?=?database.num_im?+?1;
????????database.im{database.num_im}?=?im;
????????database.index??=?[database.index;?database.num_im*ones（size（pos1）1）];
if?nargout?==?2
???handle?=?database.num_im;
end
????????database.pos????=?[database.pos;?pos];
????????database.scale??=?[database.scale;?scale];
????????database.orient?=?[database.orient;?orient];
????????database.desc???=?[database.desc;?desc];
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-05-28?10:41??SIFT\
?????文件???????30187??2014-05-28?10:41??SIFT\093.jpg
?????文件???????26733??2014-05-28?10:41??SIFT\094.jpg
?????文件???????30054??2009-05-28?12:36??SIFT\11.bmp
?????文件???????30054??2009-05-28?12:36??SIFT\12.bmp
?????文件?????????795??2009-05-28?11:45??SIFT\add_features_db.m
?????文件???????14001??2009-05-28?11:42??SIFT\features_detection.m
?????文件????????1122??2014-11-28?16:58??SIFT\ImageStitching_SIFT.m