how to create a notch filter for the image to remove noise?
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i have an image with periodic noise
after applying the fourier transform and fftshift i got
help me to design the notch filters to remove the noise
Accepted Answer
Image Analyst
on 19 Dec 2016
1 vote
See my FFT filter demo, attached.
3 Comments
Siddardha Mamillapalli
on 19 Dec 2016
Edited: Image Analyst
on 5 Jun 2020
not working on this image
Karissa Tilbury
on 5 Jun 2020
Can I ask how the amplitudeThreshold in line 73 is determined? Trial and error? Or did you use some histogram approach? Also curious about line 87 where you removed the brightSpike for DC between rows 115-143. How did you know this was the location?
Image Analyst
on 5 Jun 2020
Siddarha, that image does not have periodic noise.
Karissa, the threshold is determined by trial and error. Adjust it until you get the best result.
The DC spike will always be exactly at the exact center of the spectrum.
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