Hi Bruce et al. I have a quick question about the interpretation of surface normal files and the various ways you can create them with Freesurfer.
As far as I know, there are two ways to get the normals information: mris_convert -n lh.inflated lh.inflated.normals2 and mri_surf2surf --s fsaverage --hemi lh --sval-nxyz inflated --tval lh.inflated.normals2.mgz The first writes an ascii file with 491522 rows and 4 columns (the last of which is all 0's), while the second writes a surface scalar "image" with dimensions 163842 x 1 x 1 x 3. Am I right to assume that the coordinates in the mgz image and the first n_vtx rows of coordinates in the ascii file correspond to the surface normals at the vertices of the mesh? And, furthermore, do the remaining coordinates in the ascii file correspond to the surface normals of the triangle faces on the mesh? Thanks! Michael _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
