AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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bob cox
June 26, 2009 05:11PM
The calculation of the local nbhd FWHM estimates is what takes the most time. I suppose this could be parallelized, but I'm not likely to do it in this weekend.

The other difference (besides edge/mask effects) between 3dmerge blurring and 3dBlurToFWHM is that the latter will blur to a global FWHM estimate, whereas the former just adds smoothness (including past the brain edge).

So we have the following hierarchy:

1) 3dBlurToFWHM with local estimates == respects a mask, does local and global smoothness estimates/control

2) 3dBlurToFWHM with '-nbhd NULL' == respects a mask, does global smoothness estimate/control

3) 3dBlurInMask == respects a mask

4) 3dmerge -1blur_fwhm == just does blurring
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Subject Author Posted

3dBlurToFWHM on gray matter probability images

Giuseppe Pagnoni June 26, 2009 11:41AM

Re: 3dBlurToFWHM on gray matter probability images

bob cox June 26, 2009 04:06PM

Re: 3dBlurToFWHM on gray matter probability images

Giuseppe Pagnoni June 26, 2009 04:31PM

Re: 3dBlurToFWHM on gray matter probability images

bob cox June 26, 2009 05:11PM

Re: 3dBlurToFWHM on gray matter probability images

Giuseppe Pagnoni June 26, 2009 05:23PM