Hi,

I am trying to genearate average surface curvature map from ?h.sphere.reg.

One way I did is using make_average_subject. I got both volume and surface avareges. I also created a surface using my own method: resample the surface maps ?h.sphere.reg to a common spherical coordinates (th, phi), and calculate the averages of all spheres. The average surface map I got is somewhat different from the result of "make_average_subject". Can somebody tell me the rough procedure of mris_make_average_surface?

As far as I know from the FreeSurfer docs, mris_make_average_surface averages a set of surface coordinates and generate an average surface using Talairach coordinates and spherical transform. For the spherical average, does it resample the individual spheres to a common spherical coordinates and average them?

Thanks.

XJ Kang
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