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Understanding the Role of Phase Function in Translucent Appearance

Gkioulekas, I., Xiao,B., Zhao, S., Adelson, E.H., Zickler, T., and Bala, K.

Abstract

Multiple scattering contributes critically to the characteristic translucent ap- pearance of food, liquids, skin, and crystals; but little is known about how it is perceived by human observers. This paper explores the perception of translucency by studying the image effects of variations in one factor of multiple scattering: the phase function. We consider an expanded space of phase functions created by linear combinations of Henyey-Greenstein and von Mises-Fisher lobes, and we study this physical parameter space using computational data analysis and psychophysics. Our study identifies a two-dimensional embedding of the physical scat- tering parameters in a perceptually-meaningful appearance space. Through our analysis of this space, we find uniform parameterizations of its two axes by analytical expressions of moments of the phase function, and provide an intuitive characterization of the visual effects that can be achieved at dif- ferent parts of it. We show that our expansion of the space of phase func- tions enlarges the range of achievable translucent appearance compared to traditional single-parameter phase function models. Our findings highlight the important role phase function can have in controlling translucent ap- pearance, and provide tools for manipulating its effect in material design applications.

Information

title:
Understanding the Role of Phase Function in Translucent Appearance
author:
Gkioulekas,
I.,
Xiao,
B.,
Zhao,
S.,
Adelson,
E.H.,
Zickler,
T.,
and Bala,
K.
citation:
ACM Trans. Graph.
year:
2012
created:
2012-09-11
keyword:
adelson
summary:
translucency
pdf:
http://persci.mit.edu/pub_pdfs/translucency.pdf
pageid:
shapecollage
type:
publication
 
publications/translucency.1360854353.txt.gz · Last modified: 2013/02/14 10:05 by elmer