Ok, great!
And can you (or anyone else) tell me the difference between the smoothing done
in randomise vs the smoothing done using this command (kernel gauss)? What is
techically being done in the two?
Thank you!
Sandra
-----Original Message-----
From: FSL - FMRIB's Software Library on behalf of Benjamin Kay
Sent: Mon 10/31/2011 4:42 PM
To: [log in to unmask]
Subject: Re: [FSL] help with Spacial Smoothing
You can use:
fslmaths original.nii -kernel gauss 2.1233226 -fmean smoothed.nii
The gaussian kernel takes its argument as sigma in mm instead of the FWHM, but
you can see how to convert between these two values here:
http://mathworld.wolfram.com/GaussianFunction.html
Basically, divide your FWHM (in mm) by 2.3548 to get sigma.
On Monday, October 31, 2011 16:32:33 you wrote:
> Hello FSL,
>
> We are looking to apply spacial smoothing (5mm) to a 3D image. Is there a
> specific command to do this? Or do we use a flag, if so what would this be
> and with what command. I'm thinking we would use FWHM and possibly with
> fslmaths, but I could like to confirm and know the specifics.
>
> And could someone tell me is it/ when would be appropriate to use smoothing
> via a Gaussian Kernal? (fslmaths <3Dimage> -kernel gauss 5)?
>
> Thanks for your help!
>
>
> Sandra
>
>
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