Thanks Donna! > http://brainvis.wustl.edu/wiki_linked_files/documentation/Caret_5.5_Tutorial_Segment.pdf
I have gone through that tutorial, but it doesn't change the number of vertices of the mesh (unless I missed something). As you said, "changing the geometry doesn't change the mesh". I'm asking about the ability to *resample* meshes to 73,730 nodes. "Using a strategy introduced by Saad et al (2004), the various surface configurations...were resampled so that they were represented using the 73,730-node 'standard-mesh'..." (A PALS Atlas of Human Cerebral Cortex, Van Essen 2005). Was that in Caret, or was that done outside of Caret? I haven't gotten the Freesurfer process under control yet, and will no doubt have questions about that before long (some basic newbie ones no doubt). On Apr 12, 2011, at 2:41 PM, Donna Dierker wrote: >> Thanks for the reply! >> >> I was under the impression that inflating, flattening and registration >> didn't change the number of verteces in the mesh. That way, one can easily >> go from a point in the flat mesh to the corresponding point in the >> original space. (ie, if a vertex on the flatmap is vertex number 12,329, >> than one need only get the coordinates of the 12,329th vertex of the >> corresponding cortical mesh.) > > Correct -- changing the geometry doesn't change the mesh. > >> I couldn't find a tutorial that shows how to do the surface-based >> registration to an atlas such that it changes the number of vertices (for >> example to '74k'). > > Look for the word "Registration" in the title, e.g.: > > http://brainvis.wustl.edu/wiki_linked_files/documentation/Caret_5.5_Tutorial_Segment.pdf > > But as I said earlier, if you use the pipeline, there is a command line > step near the end of the postborder.sh script that runs spherical > registration. Everything in preborder.sh and postborder.sh is leading up > to this final step. > > >> On Apr 9, 2011, at 8:25 PM, David Van Essen wrote: >> >>> Colin, >>> >>> Segmentation produces a 'native mesh' whose exact node number cannot be >>> prespecified in Caret (or in other segmentation algorithms I know >>> about). >>> >>> The 73,730-node mesh ('74k' in our latest lingo) arises from >>> surface-based registration to an atlas - either the macaque F99 atlas (a >>> 74k_f99 mesh) or the human PALS-B12 atlas (a 74k_pals mesh) - using the >>> appropriate tutorial. >>> >>> David VE >>> >>> >>> On Apr 8, 2011, at 6:48 PM, Colin Davey wrote: >>> >>>> Hi, >>>> >>>> How do you create a 73,730 standard-mesh with Caret? I assume you begin >>>> by going through segmentation, flattening and registration process from >>>> the tutorial of the same name. But then what? >>>> >>>> Cheers, >>>> - C >>>> >>>> *************************************** >>>> Colin Davey >>>> Scientist >>>> Senior Software Engineer >>>> >>>> Electrical Geodesics, Inc. >>>> 1600 Millrace Dr. St 307 >>>> Eugene, OR 97403 >>>> >>>> Learn Boogie Woogie Piano >>>> http://www.ColinDavey.com/BoogieWoogie >>>> *************************************** >>>> >>>> _______________________________________________ >>>> caret-users mailing list >>>> [email protected] >>>> http://brainvis.wustl.edu/mailman/listinfo/caret-users >>> >>> _______________________________________________ >>> caret-users mailing list >>> [email protected] >>> http://brainvis.wustl.edu/mailman/listinfo/caret-users >> >> _______________________________________________ >> caret-users mailing list >> [email protected] >> http://brainvis.wustl.edu/mailman/listinfo/caret-users >> > > _______________________________________________ > caret-users mailing list > [email protected] > http://brainvis.wustl.edu/mailman/listinfo/caret-users _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
