Full-dimensional (8-D) BSSRDF completely expresses various light interactions on object surface such as reflection and subsurface scattering. However, it is difficult to sample full-dimensional BSSRDF because it requires many illuminations and observations from various directions. There are many research which approximated BSSRDF as a low-dimensional function by only considering the medium as homogeneous or assuming isotropic scattering. Therefore, in this research, we show a novel sampling and analyzing method for full-dimensional BSSRDF of real scenes. We sample the BSSRDF using a polyhedral mirror system to place a lot of virtual cameras and projectors. In addition, we propose a method of decomposition of BSSRDF into isotropic and anisotropic components for scattering analysis. We show the empirical characteristics of subsurface scattering inside a real medium by analyzing sampled full-dimensional BSSRDF.
- IPSJ Transactions on CVA, 2013 [J-STAGE]