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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Wolfgang
October 24, 2007 03:53PM
Thanks again, the amount of confusion is actually getting smaller...

See attached (if I'm able this time to attach an image...) example of how FLIRT (and most FSL utilities) are using rotations.

They are actually rotating the image about the upper right corner (and many other operations are referenced to that corner too, like changing FOV in FSL).

So, for a proper -fsl_matvec (at least with FLIRT 5.4.2) the FLIRT transformation matrix would be as mentioned before

a b c d
e f -g -h
i -j l -m
0 0 0 1

plus a shift due to rotation around the upper right corner instead the center.

Wolfgang
Subject Author Posted

FLIRT matrix in AFNI

Wolfgang October 19, 2007 01:12PM

Re: FLIRT matrix in AFNI

bob cox October 22, 2007 12:57PM

Re: FLIRT matrix in AFNI

bob cox October 22, 2007 01:27PM

Re: FLIRT matrix in AFNI

Wolfgang October 24, 2007 11:42AM

Re: FLIRT matrix in AFNI

Wolfgang October 24, 2007 12:04PM

Re: FLIRT matrix in AFNI

bob cox October 24, 2007 02:23PM

Re: FLIRT matrix in AFNI

Wolfgang October 24, 2007 03:53PM

Re: FLIRT matrix in AFNI

bob cox October 24, 2007 04:14PM

Re: FLIRT matrix in AFNI

Nachiket Nadkarni June 25, 2008 11:38PM