Hi Lisa, we actually provide a discrete estimate using Gauss-Bonnet (Rudolph can give you the details), and a slightly larger-scale estimate by fitting a quadratic patch to each neighborhood (5mm on a side I think). The curvature then comes from the Hessian of the height function of that patch.
cheers, Bruce On Fri, 26 Feb 2010, Lisa Ronan wrote: > Hi All > > I wonder could you tell me how Gaussian curvature values are computed at a > vertex, i.e. Gauss_Bonnet scheme? Is there any way to vary the neighborhood > over which the vertex curvature values are computed? > > Thanks for your help, > > Lisa Ronan > > - - - - - - - - - - > Research Associate > Brain Mapping Unit > Sir William Hardy Building > Department of Psychiatry > University of Cambridge > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
