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how can I remove noise by using frequency domain technique??

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anybody help me how to remove noise from a picture? Consider the image which simulates the effect of mains signal interference in the amplifying electronics of the image sensor?

Accepted Answer

Image Analyst
Image Analyst on 16 Jan 2013
Is this your homework exercise? It sounds like a typical homework problem.
You can easily just fft2() your image, display it and find the spike, then zero out or reduce that spike, and finally inverse transform. If you're taking a class they should have gone over that. It's pretty straightforward.
Long Bunly
Long Bunly on 17 Jan 2013
Thanks, with your code I have an idea, I should use arithmetic, also teacher require us to use frequency domain technique, I try it again so :), Thank you again.

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More Answers (1)

Shashank Prasanna
Shashank Prasanna on 16 Jan 2013
What find of filters are you looking for specifically?
Here are some examples of deblurring filters in the image processing toolbox

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