Hi, Can you say a bit more about what you mean?
> If my memory serves, as you go to higher resolutions you end up with multiple points being mapped to the same location, Do you mean multiple icosahedron vertices being mapped to the same native mesh vertex, or the other way around? In any case, the issue here is a little bit different, in that it is just raised when trying to generate a color table for the annotation: https://github.com/neurodebian/freesurfer/blob/master/utils/colortab.c#L540 Michael On Fri, Mar 25, 2016 at 11:27 AM, dgw <dgwake...@gmail.com> wrote: > Hi Michael, > > I think this is a problem that crops up periodically for us in the > MEEG world, where we use these downsampling > as calculated in MNE. If my memory serves, as you go to higher > resolutions you end up with multiple points > being mapped to the same location, which I don't believe we have ever > found a solution to. Note, this can even happen > at ico 5 (particularly on smaller brains). > > > hth > d > > On Fri, Mar 25, 2016 at 2:20 PM, Michael Waskom <mwas...@stanford.edu> > wrote: > > Hi Freesurfers, > > > > I'd like to use mris_make_face_parcellation to downsample an individual > > subject's surface mesh to a resolution similar to fsaverage6. > > > > My understanding is that mris_make_face_parcellation should let me do > this, > > and it does what I expect with ic3-5. However when I run it with ic6 as > the > > target, it fails: > > > > [surf]$ mris_make_face_parcellation lh.sphere > > $FREESURFER_HOME/lib/bem/ic6.tri ../label/lh.ico6.annot > > Reading lh.sphere > > Reading /share/awagner/software/freesurfer/v5.3.0/lib/bem/ic6.tri > > parcellating hemisphere into 40962 units > > INFO: CTABunique() could not find a unique set in 10 tries > > INFO: CTABunique() could not find a unique set in 100 tries > > ERROR: could not find a unique color table > > > > I don't really care if the colors themselves are distinct, and it should > be > > possible to just programmatically generate a valid color table (since > 255 ^ > > 3 > 40962). I thought that providing a colortable with unique values > through > > the -ctab option might work, but looking at the source code it seems that > > option will *write* a colortable, not read one. > > > > So, is there any way to accomplish the downsampling I want? > > > > Thanks in advance, > > Michael > > > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > > > > The information in this e-mail is intended only for the person to whom > it is > > addressed. If you believe this e-mail was sent to you in error and the > > e-mail > > contains patient information, please contact the Partners Compliance > > HelpLine at > > http://www.partners.org/complianceline . If the e-mail was sent to you > in > > error > > but does not contain patient information, please contact the sender and > > properly > > dispose of the e-mail. > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >
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