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Abstract:
We introduce an empirical model for multiple scattering in heterogeneous
translucent objects for which classical approximations such as the
dipole approximation to the di usion equation are no longer valid.
Motivated by the exponential fall-o of scattered intensity with
distance, di use subsurface scattering is represented as a sum of
exponentials per surface point plus a modulation texture. Modeling
quality can be improved by using an anisotropic model where exponential
parameters are determined per surface location and scattering direction.
We validate the scattering model for a set of planar object samples
which were recorded under controlled conditions and quantify the
modeling error. Furthermore, several translucent objects with complex
geometry are captured and compared to the real object under similar
illumination conditions.
