采样一幅图．利用小波变根据二进制数（水印）来改变图片，提取其中一个子带的直方图．-a sampling plan. Using wavelet based binary variable (Watermark) to change the picture, which extraction of a subband histogram.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001663s ]
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:0.103289s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001076s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001247s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001044s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003286s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001074s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004022s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020680s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001381s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 141178 [ RunTime:0.016205s ]
