function?extr_sift（img_dir?data_dir）
%?for?example
%?img_dir?=?‘image/Caltech101‘;
%?data_dir?=?‘data/Caltech101‘;

addpath（‘sift‘）;

gridSpacing?=?6;
patchSize?=?16;
maxImSize?=?300;
nrml_threshold?=?1;

[database?lenStat]?=?CalculateSiftDescriptor（img_dir?data_dir?gridSpacing?patchSize?maxImSize?nrml_threshold）;

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????3758??2009-04-20?00:42??sift\CalculateSiftDescriptor.m

?????文件???????4187??2009-04-07?03:24??sift\sp_find_sift_grid.m

?????文件????????971??2009-09-27?03:20??sift\sp_normalize_sift.m

?????文件????????322??2010-05-27?22:30??extr_sift.m

?????文件???????1559??2010-05-07?18:43??LLC_coding_appr.m

?????文件???????1709??2010-05-07?18:41??LLC_pooling.m

?????文件???????7328??2010-05-27?22:46??LLC_Test.m

?????文件????????698??2010-05-27?23:07??README

?????文件???????1537??2010-05-26?16:21??retr_database_dir.m

?????文件?????579328??2010-04-11?23:06??dictionary\Caltech101_SIFT_Kmeans_1024.mat

?????目錄??????????0??2010-05-27?22:47??image

?????目錄??????????0??2010-05-08?19:35??sift

?????目錄??????????0??2010-05-27?22:48??data

?????目錄??????????0??2010-05-08?19:35??dictionary

?????目錄??????????0??2010-05-27?22:48??features

-----------?---------??----------?-----??----

???????????????601397????????????????????15