这个程序实现基本罗伯特，Prewitt算子和Sobel算子为更好的边缘检测是标准的运营商来检测边缘。this program implement basic Robert, Prewitt and Sobel operator for better edge detection which are standard operator to detect edge.
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robert, sobel, prewitt op prewittsop.asv prewittsop.m robertop.asv robertop.m sobelop.asv sobelop.m
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002822s ]
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:0.100406s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002829s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.003616s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004030s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002029s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003328s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015659s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002405s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 30189 [ RunTime:0.001334s ]
