Fig. 3.

Using first order ellipsoids (FOEs) to establish surface correspondence between two subjects: Each row corresponds to one subject, where both FOEs and the degree 15 SPHARM reconstructions are displayed. The underlying parameterization defines the correspondence between SPHARM models and is shown as a colorful mesh superimposed onto the surface. Shown in (a) is the initial configuration of each subject, where the parameter nets are not aligned well. Shown in (b) is the result of rotating the FOEs to a canonical position to establish surface correspondence across subjects.