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

History of AFNI updates  

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July 26, 2012 04:25PM
The binaries that are building tonight will allow the astute user to control the operation of the '-final wsinc5' interpolation in detail. The control is done via Unix environment variables, and the documentation is in the output of '3dAllineate -HELP' (notice the all caps, to get the advanced options).

In particular, you can control:
* the radius of the interpolation mask (default=5 voxels, range allowed is 3..21)
* the amount of tapering (default = full width of mask)
* the tapering function (default = 3 cosine minimum sidelobe)
My brief experiments show that setting RADIUS=3 is visually similar to using quintic interpolation, and setting RADIUS=9 or more does not make any visible difference.

Note that the program will get slower and slower as RADIUS increases -- RADIUS=21 is probably both useless and impracticable. The tapering function probably won't make much difference either. Nevertheless, these capabilities are there (or will be there on Friday morning, after the compilations finish) for you to mess around with. Let me know if you achieve anything noteworthy.
Subject Author Posted

3dAllineate "resample" trick w/ -final wsinc5

jdviviano July 22, 2012 11:17AM

Re: 3dAllineate "resample" trick w/ -final wsinc5

Bob Cox July 23, 2012 11:36AM

Re: 3dAllineate "resample" trick w/ -final wsinc5

jdviviano July 23, 2012 04:39PM

Re: 3dAllineate "resample" trick w/ -final wsinc5

Bob Cox July 23, 2012 07:26PM

Re: 3dAllineate "resample" trick w/ -final wsinc5

jdviviano July 24, 2012 12:53AM

Re: 3dAllineate "resample" trick w/ -final wsinc5

Bob Cox July 24, 2012 11:03AM

Re: 3dAllineate "resample" trick w/ -final wsinc5

jdviviano July 24, 2012 04:53PM

Re: 3dAllineate "resample" trick w/ -final wsinc5

Bob Cox July 25, 2012 09:52AM

Re: 3dAllineate "resample" trick w/ -final wsinc5

jdviviano July 25, 2012 06:27PM

Re: 3dAllineate "resample" trick w/ -final wsinc5

Bob Cox July 26, 2012 04:25PM

Re: 3dAllineate "resample" trick w/ -final wsinc5

jdviviano September 13, 2012 09:52AM

Re: 3dAllineate "resample" trick w/ -final wsinc5

Bob Cox September 13, 2012 03:49PM

Re: 3dAllineate "resample" trick w/ -final wsinc5

jdviviano September 13, 2012 07:17PM