Re: [Freesurfer] mris_curvature questions

Hi Tim

1) this is iterative averaging on the mesh, which approximates Gaussian in the limit. So -a 2 means average twice.

2) -nbs N means N hops on the mesh. 1 would be just nearest neighbor

cheers Bruce

On Wed, 3 Apr 2019, Tim Schäfer wrote:

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Dear list,

I have two questions on mris_curvature command line options:

1. the '-a' option, help text is: '-a <avgs>: perform <avgs> iterative averages of curvature measure before saving':

Afaik, this is a smoothing operation. But what exactly is averaged?

2. the '-nbrs' option, help text is '-nbrs <nbrs>: set neighborhood size to nbrs'

For this one I would like to know what the default value is if the option is omitted. And what is the unit, is the neighborhood given in hops in the mesh (all vertices reachable by crossing <nbrs> edges)?

Best,

Tim

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