Re: [Freesurfer] (no subject)

the decimation code only finds equally spaced points, I don't think it generates a tesselation. One way to downsample is to map onto on of the ico surfaces, then pick the first n points, where n is one of the downsampled icosahedra. Otherwise, I think there are other people who have written sur

[Freesurfer] (no subject)

Hi: I am trying to generate a down sampled tessellation file from inflated pial in TkSurfer. I used write decimation in tool->surface menu, and can find vertices. How can I fill the boundary of those points, and save the vertices and faces, so that I can get a new .tri file? Thanks a lot! ___

Re: [Freesurfer] Making a patch of area A

Hello, You may prefer to write your own code for calculating the patch, but I thought I would just mention that this functionality is implemented in Caret (http://brainmap.wustl.edu/resources/caretnew.html). Caret can read FreeSurfer surfaces. It will calculate the distance of all nodes from a gi

Re: [Freesurfer] Making a patch of area A

The sphere-based patch will change size and shape a little when you map it back to the folded surface due to metric distortion. So you could refine it some, eg, run your Dijstra algorithm on just the patch. I would not expect the distortion to make much of a difference, so it's probably not worth

Re: [Freesurfer] spherical surface problem

try loading the ?h.curv or ?h.sulc file. File->Load Curvature On Wed, 9 Mar 2005, raffaele raffaele wrote: Hi all, after process volume, create surface and manually edit topological defects procedure, I did fix surface topology process. When fix surface topology process finished I try to view sp

Re: [Freesurfer] Making a patch of area A

Hi Bruce Yes, I'm sorry I wasn't clear in my previous posting. I think that you and I are talking about the same thing... The surface distance along the sphere from my vertex point... let's call that arc length. So I want to have all freesurfer points which are less than or equal to an arc leng

[Freesurfer] spherical surface problem

Hi all, after process volume, create surface and manually edit topological defects procedure, I did fix surface topology process. When fix surface topology process finished I try to view spherical surface but an all grey sphere appears. What can I do? Thanks Raffaele Esposito Pisa Italy ___