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:0.001864s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001150s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000804s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001566s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 306641 [ RunTime:0.026612s ]
