Thanks，I will try。
On Thu, Feb 13, 2014 at 9:47 PM, Douglas N Greve <gr...@nmr.mgh.harvard.edu>wrote: > > Please remember to post the list and not to us personally. Thanks! > Actually, I don't know of a good way to do what you want to do (I thought I > had an idea, but it won't work). One way to do this would be to select a > random set of vertices. This would be approximately uniform. Alternatively, > you can use mris_make_face_parcellation but you will be limited by the > icosahedral series. If you want to go with the first option, you can run > > mri_volsynth --temp subject/surf/lh.thickness --pdf uniform --o junk.mgh > > mri_binarize --i junk.mgh --min .9 --o mask.mgh > > The first command synthesizes a surface overlay with uniformly distributed > random numbers between 0 and 1. The second command thresholds at .9, so > you'd get about 10% of the vertices > > doug > > > > > > On 02/13/2014 02:20 AM, peng wrote: > >> Hi Douglas, >> >> Thanks for your reply. Yes, I mean "a mask surface overlay with 1s in >> some vertices and 0s in others". And I also wish to convert there >> coordinates back to the volume coordinates later (e.g. RAS etc.), which I >> think is possible. >> >> >> On Wed, Feb 12, 2014 at 4:15 PM, Douglas Greve >> <gr...@nmr.mgh.harvard.edu<mailto: >> gr...@nmr.mgh.harvard.edu>> wrote: >> >> >> what do you mean by "dots"? Eg, a mask surface overlay with 1s in >> some vertices and 0s in others? Or a label? >> doug >> >> >> >> >> On 2/12/14 9:52 AM, peng wrote: >> >>> Dear Freesurfers, >>> >>> I have run recon-all and got a set of surfaces for the >>> subjects. I wish to distribute N dots about evenly on the surface >>> to cover most gyri and sulci , but I don't how to implement that. >>> One way is to manually put them in the GUI of freeview, but it is >>> not so convenient if N is relative large (say, 200). Can anyone >>> give me a hint which function shall I use? >>> >>> >>> best >>> Peng >>> >>> >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu <mailto:freesur...@nmr.mgh. >>> harvard.edu> >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu <mailto: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. >> >> >> > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 > Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > >
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