Program to realize the filtering algorithm of gray image in frequency domain. Matlab is used to realize two versions of no extension and extension. For the extension version and the non extension version, the differences between the ideal low-pass filter, Butterworth low-pass filter and Gauss low-pass filter are compared; for the extension version, the effects of different parameter settings on the above three filter results are compared.

Filename	Size	Update
dftuv.m	736	2016-10-11
hpfilter.m	1264	2016-10-11
lpfilter.m	1473	2016-10-11
paddedsize.m	1323	2016-10-11
pic.jpg	635138	2019-11-13
wuyantuo.m	820	2019-12-05
yantuo.m	892	2019-12-05

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