针对Mean Shift算法不能跟踪快速目标、跟踪过程中窗宽的大小保持不变的特点。首先，卡尔曼滤波器初步预测目标在本帧的可能位置；其次， Mean Shift算法在这点的邻域内寻找目标真实的位置；最后，在目标出现大比例遮挡情况时，利用卡尔曼残差来关闭和打开卡尔曼滤波器。实验表明该算法在目标尺度变化、遮挡等情况下对快速运动的目标能够取得较好的跟踪效果。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001514s ]
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:0.094283s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001070s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001483s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000886s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003420s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001945s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003854s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015573s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001015s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 507391 [ RunTime:0.045067s ]
