Perception of Reflectance
We design and implement a comprehensive study of the perception of gloss. This is the largest study of its kind to date, and the first to use real material measurements. In addition, we develop a novel Multi-Dimensional Scaling (MDS) algorithm for analyzing pairwise comparisons. The data from the psychophysics study and the MDS algorithm is used to construct a low dimensional perceptual embedding of these BRDFs. The embedding is validated by correlating it with nine gloss dimensions, fitted parameters of seven analytical BRDF models and a perceptual parameterization of Ward’s model. We also introduce a novel perceptual interpolation scheme that uses the embedding to provide the user with an intuitive interface for navigating the space of gloss and constructing new materials.
Code for Generalized Non-metric MDS.
For the human subject responses please email Josh Wills at josh-at-joshwills.com.
ACM Transactions on Graphics, 28 (4), pp. 1-15, 2009.
AISTATS, San Juan, Puerto Rico, 2007.