first caveat, I could be wrong: On Fri, Mar 25, 2016 at 3:18 PM, Michael Waskom <mwas...@stanford.edu> wrote: > 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?
I can't remember correctly, this is one of those cases, where I remember it was surprising and confusing, but can't remember what the right answer was > > 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 I'm wondering if that is just a quirk of the error reporting, because the check for multiple vertices in FreeSurfer is at the colortab stage. hth d > > 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 > > > > _______________________________________________ > 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
