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:0.000926s ]
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:0.077052s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001076s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001135s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000994s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003046s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000787s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003607s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015719s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001357s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 138673 [ RunTime:0.015382s ]
