How can I clear the noise from a picture

Assume that a picture is multiplied by the noise sin(Ax+By). how can I clear the noise using deconvolution?

Answer 1

[Image Analyst]

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.

[geometry geometry]

The question in the homework asks us to use deconvolution.

[Image Analyst]

What have you studied about it in class? See this link for tips http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers