Hi Ray
the -1 means that the target is a single surface and not an atlas, but
the registration is still nonlinear. The variances will all be 1 so you
may have to play with the weights in the energy functional. We don't do
this very much and it probably defaults to quite rigid. Try reducing the
weight on the metric preservation term (e.g. -dist .25) if you want it to
be more nonlinear
cheers
Bruce
On Tue, 3 Nov 2015, Razlighi, Qolamreza R. wrote:
Hi Guys,
I read in the sidenote here
(https://surfer.nmr.mgh.harvard.edu/fswiki/SurfaceRegAndTemplates) that
inter-subject surface base registration using mris_register and -1 flag
performs a sort of rigid registration. So I tried it between two of my
subjects with the command below
mris_register -1 -curv P00001639/FreeSurferClean/surf/lh.sphere
P00001639/FreeSurferClean/surf/lh.sphere lh.sphere3.reg
and got the results (see the attachment). It is clear that the registration
output is just a shifted version of the source. Having this confirmed I want
to know if there is any way to force the mris_register to perform a complete
non-linear surface based registration for inter-subjects registration the
same way it does for template.
I have to mention that I visualize the lh.sphere3.reg using freeview and
loaded the sane lh.curv on that surface. I hope I’m not doing anything
stupid.
[IMAGE]
Best
--
Ray Razlighi, Ph.D.
Assistant Professor
Quantitative Neuroimaging Laboratory
Division of Cognitive Neuroscience
Department of Neurology
Columbia University
Alt: razli...@gmail.com
Office Phone: 212-342-1352
Office Fax: 212-342-1838
Website: http://www.columbia.edu/cu/qnl/
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