A Novel Hemispherical Basis for Accurate and
Efficient Rendering by
This paper presents a new set of
hemispherical basis functions dedicated to hemispherical data
representation. These functions are derived from associated Legendre
polynomials. We demonstrate the usefulness of this basis for
representation of surface reflectance functions, rendering using
environment maps and for efficient global illumination computation
using radiance caching. We show that our basis is more appropriate for
hemispherical functions than spherical harmonics. This basis can be
efficiently combined with spherical harmonics in applications involving
both hemispherical and spherical data
This work was partially sponsored by
ATI Research, I-4 Matching fund and Office of Naval Research.
Presentation video is available in AVI format.
Powerpoint slides of the EGSR presentation are available here.