How can I clear the noise from a picture

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geometry geometry
geometry geometry 2018-6-30
评论： Image Analyst 2018-7-1
Assume that a picture is multiplied by the noise sin(Ax+By). how can I clear the noise using deconvolution?

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Image Analyst
Image Analyst 2018-6-30
The easiest thing to to not use convolution and just divide by the known pattern. Any reason why you're not doing that?
Otherwise you can find the low frequency spikes in the Fourier domain and erase them. See attached demos.

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