Histogram of
Oriented Gridients，缩写为HOG，是目前计算机视觉、模式识别领域很常用的一种描述图像局部纹理的特征。这个特征名字起的也很直白，就是说先计算图片某一区域中不同方向上梯度的值，然后进行累积，得到直方图，这个直方图呢，就可以代表这块区域了，也就是作为特征，可以输入到分类器里面了。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000974s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.078795s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001694s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002446s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001704s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006940s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001508s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.008566s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023939s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001165s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 26502 [ RunTime:0.016289s ]
