The first two functions are useful for creating a blank image of the specified parameters. A possible use is in functions that require a pointer to a result.
The clone function performs an exact copy of the IplImage* parameter
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001170s ]
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:0.130217s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001019s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001114s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001071s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003361s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000914s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003491s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015322s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001242s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 387938 [ RunTime:0.014689s ]
