实现图像的增强，由均值与事先设定的阈值比较，得到不同的参数，再通过这些参数进行图像的增强。-Realize enhanced image by the mean and the pre-set threshold compared with different parameters, these parameters through image enhancement.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001705s ]
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:0.146170s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001711s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003404s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001941s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006379s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001581s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003412s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014834s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001606s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 138673 [ RunTime:0.001394s ]
