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Appearance-from-motion: Recovering Spatially Varying Surface Reflectance Under Unknown Lighting by Yue Dong; Guojun Chen; Pieter Peers; Jiawan Zhang; Xin Tong is a Computer Science article available to read on EtoBox.

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We present "appearance-from-motion", a novel method for recovering the spatially varying isotropic surface reflectance from a video of a rotating subject, with known geometry, under unknown natural illumination. We formulate the appearance recovery as an iterative process that alternates between estimating surface reflectance and estimating incident lighting. We characterize the surface reflectance by a data-driven microfacet model, and recover the microfacet normal distribution for each surface point separately from temporal changes in the observed radiance. To regularize the recovery of the incident lighting, we rely on the observation that natural lighting is sparse in the gradient domain. Furthermore, we exploit the sparsity of strong edges in the incident lighting to improve the robustness of the surface reflectance estimation. We demonstrate robust recovery of spatially varying isotropic reflectance from captured video as well as an internet video sequence for a wide variety of materials and natural lighting conditions.

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Author

Yue Dong; Guojun Chen; Pieter Peers; Jiawan Zhang; Xin Tong

Publisher

ACM

Published

2014

Language

EN

Field

Computer Science (Physical Sciences)