Computational illumination techniques for appearance acquisition and modeling
Abhijeet Ghosh
Imperial College London, UK
: J Comput Eng Inf Technol
Abstract
This talk will cover state of the art techniques for acquisition of facial and material appearance including shape and reflectance properties. Central to the acquisition will be measurement under controlled illumination using various acquisition setups. The first part of the talk will present state of the art techniques for acquisition of facial geometry and reflectance using polarized illumination which are currently employed for facial acquisition for visual effects in movies and games. Specifically, the talk will cover practical ways of measuring layered skin reflectance including surface and subsurface scattering using a small set of measurements as well a state of the art technique for multi-view facial geometry and reflectance acquisition with polarized spherical gradient illumination. The talk will also present some recent results of measuring skin micro-geometry at the resolution of a few microns for very high resolution (16K) rendering of skin for increased realism. The second half of the talk will focus on measurement and modeling of material reflectance properties. Once again, controlled spherical illumination from various lighting setups will be presented for estimation of spatially varying diffuse and specular reflectance properties including albedo, surface normals, specular roughness and anisotropy.
Biography
