利用边界追踪法对图像进行轮廓提取，此函数文件得到的是边界点对应位置索引矩阵-The use of boundary-tracing method of image contour extraction, this function is to document the location of boundary points corresponding to the index matrix
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002147s ]
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:0.090830s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002383s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002090s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002179s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003721s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002041s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003349s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014723s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002448s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 165611 [ RunTime:0.001200s ]
