Reducing Anisotropic BSDF Measurement to Common Practice

作者：Greg Ward, Murat Kurt, Nicolas Bonneel · 发表于：Eurographics · 年份：2014 · DOI：10.2312/mam.20141292 · 被引用次数：22 · 研究领域：Computer Graphics and Visualization Techniques、Advanced Vision and Imaging、Optical measurement and interference techniques

We address the problem of measuring and representing reflection and transmission for anisotropic materials without relying on mathematical models or a large sample database. By eliminating assumptions of material behavior, we arrive at a general method that works for any surface class, from metals to fabrics, fritted glazing, and prismatic films. To make data gathering practical, we introduce a robust analysis method that interpolates a sparse set of incident angle measurements to obtain a continuous function over the full 4-D domain. We then convert this interpolant to a standard representation tailored for efficient rendering and supported by a common library that facilitates data sharing. We conclude with some remaining challenges to making anisotropic BSDF measurements truly practical for rendering