I am trying to get an insight of the above mentioned research paper, specially about the filtering process used to remove grid artifacts. However, I find it difficult to understand it correctly.
I would be much grateful if anyone could help me to clarify a few questions that I have.
My questions are as follows:
1) what are the pixel values of the Mean filter they used? they mention about using an improved Mean filter, but what is the improvement?
2) do they apply the Mean filter in the whole patch image (seems like it), or only in the grid signal region (characteristic peak range)?
3) what do they mean by (u1,v1) being Fmax value? does that mean that the center pixel of the Mean filter is replaced by this max value?
Thanks in advance!
This is a fourier domain filtering technique. Note the area that is zeroed out in the IFFT is the frequency component of that noise frequency. This technique is used in medical imaging for mamo, ct, and mri.
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