对二维图像进行离散傅里叶变换，分别给出了直流分量移动到频谱中心前后的频谱图样。-Two-dimensional images of the discrete Fourier transform, respectively, given the spectrum to move to the DC component of the spectrum before and after the design center.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001533s ]
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:0.084980s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001240s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000957s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003412s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000771s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001031s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 306641 [ RunTime:0.014670s ]
