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Hi Bruce,
thank you for your explanation. I think I might have an idea, why the Hessian
matrix works in this case, maybe you can confirm or correct me if I'm wrong.
Usually, if you're having a 2d surface in space, the principle curvatures are
the ei
Hi Philipp
the Hessian is estimated at each vertex by doing a quadratic fit to the
local surface as the height function over the tangent plane of all the
vertices in a 2-neighborhood of that vertex. I'm not sure what the gradient
vanishing is about, but the curvatures are just the eigenvalues
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Hi,
I am trying to understand how exactly FreeSurfer estimates the curvature values
from the white surface. From the mailing lists I understood that the white
surface is modeled by fitting a second-order polynomial function and curvatures
are estima
