Matusik, WojciechPfister, HanspeterBrand, MattMcMillan, Leonard2010-05-262003Matusik, Wojciech, Hanspeter Pfister, Matt Brand, and Leonard McMillan. 2003. A data-driven reflectance model. In Proceedings International Conference on Computer Graphics and Interactive Techniques, ACM SIGGRAPH 2003 Papers: July 27-31, 2003, San Diego, California, 759-769. New York, N.Y.: ACM Press. Also published in ACM Transactions on Graphics 22(3): 759-769.1-58113-709-50730-0301http://nrs.harvard.edu/urn-3:HUL.InstRepos:4135447We present a generative model for isotropic bidirectional reflectance distribution functions (BRDFs) based on acquired reflectance data. Instead of using analytical reflectance models, we represent each BRDF as a dense set of measurements. This allows us to interpolate and extrapolate in the space of acquired BRDFs to create new BRDFs. We treat each acquired BRDF as a single high-dimensional vector taken from a space of all possible BRDFs. We apply both linear (subspace) and non-linear (manifold) dimensionality reduction tools in an effort to discover a lower-dimensional representation that characterizes our measurements. We let users define perceptually meaningful parametrization directions to navigate in the reduced-dimension BRDF space. On the low-dimensional manifold, movement along these directions produces novel but valid BRDFs.en-USBRDFimage-based modelinglight reflection modelsphotometric measurementsreflectanceConference Paper2010-05-2610.1145/882262.882343