Hi Don
By far the easiest way to do this is to find the locations of the points on the
sphere then compute the length of the great circle arc connecting them, then
correct by the ratio of the sqrt of the areas of the two surfaces.
Alternatively I think Rudolph may have had some tools for computing actual
geodesics (the procedure about will give you like a 10% error)
Cheers
Bruce
From: freesurfer-boun...@nmr.mgh.harvard.edu
<freesurfer-boun...@nmr.mgh.harvard.edu> On Behalf Of Krieger, Donald N.
Sent: Wednesday, July 21, 2021 10:53 AM
To: 'freesurfer@nmr.mgh.harvard.edu' <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] shortest distance between two points along the gray/white
boundary
External Email - Use Caution
Dear experts,
I would like to compute the shortest distance along the gray/white boundary
between two points on the boundary, i.e. between points with "white"
parcellation regions. The distance need not be guaranteed to be minimized and
the path need not be unique. Can you suggest an approach using the freesurfer
tools?
Thanks - Don
Department of Neurological Surgery
University of Pittsburgh
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