Hi John
mri_nlfilter implements what I think is the first example of nonlocal
filtering/nonlocal means from this paper:
http://ieeexplore.ieee.org/document/745732/
it tries to avoid displacing edges as happens in straight Gaussian
filtering
cheers
Bruce
On Thu, 14 Dec 2017, John Anderson wrote:
Dear Dr Bruce,
Kindly, I have question regarding the command "mri_nlfilter". I am sorry if my
questions is simple,
but I highly appreciate any explanation to improve my understanding.
I see in the man list of the command "mri_nlfilter" that it can apply Gaussian
filtering and
blurring kernell.
What is the difference between Gaussian smoothing and blurring. For example in
PET images we used to
smooth the images to improve SNR. Does blurring apply something similar and can
be helpful to
improve SNR.
Thanks for any clarification!
J
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