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UCSD Computer Vision

Perception of Reflectance

Josh Wills, Sameer Agarwal, David Kriegman, Serge Belongie


Synopsis

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.



Downloads

Code for Generalized Non-metric MDS.

For the human subject responses please email Josh Wills at josh-at-joshwills.com.


Related Publications

2009
Wills J., Agarwal S., Kriegman D., Belongie S., "Toward a Perceptual Space for Gloss", ACM Transactions on Graphics, vol. 28, no. 4, pp. 1-15, 2009. [BibTex][pdf]
2007
Agarwal S., Wills J., Cayton L., Lanckriet G., Kriegman D., Belongie S., "Generalized Non-metric Multidimensional Scaling", AISTATS, San Juan, Puerto Rico, 2007. [BibTex][pdf]