Polarization-imaging Surface Reflectometry using Near-field Display
Eurographics Symposium on Rendering (EGSR) 2022
Emilie Nogué ¹ ² Yiming Lin ² Abhijeet Ghosh ¹ ²
Imperial College London ¹
Lumirithmic ²
Patent Pending
Fig. 1: A planar sample (notebook cover) (a) imaged at near-Brewster angle lit by a near-field display (iPad Pro). Polarization-imaging of sample in conjunction with controlled display illumination enables estimation of high-quality SVBRDF maps (b – e). Rendering of sample with point light from front (f), and 45◦ from above (g).
Abstract:
We present a practical method for measurement of spatially varying isotropic surface reflectance of planar samples using a combination of single-view polarization imaging and near-field display illumination. Unlike previous works that have required multiview imaging or more complex polarization measurements, our method requires only three linear polarizer measurements from a single viewpoint for estimating diffuse and specular albedo and spatially varying specular roughness. We obtain high-quality estimate of the surface normal with two additional polarized measurements under a gradient illumination pattern. Our approach enables high-quality renderings of planar surfaces while reducing measurements to a near-optimal number for the estimated SVBRDF parameters.
Publication: Polarization-imaging Surface Reflectometry using Near-field Display. Emilie Nogué, Yiming Lin, and Abhijeet Ghosh. Proc. of Eurographics Symposium on Rendering (EGSR), July 2022. (Patent Pending)
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 956585.
