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:0.001241s ]
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:0.085315s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000972s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001209s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000844s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003481s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001097s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006983s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.022402s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.015864s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 165611 [ RunTime:0.041871s ]
