Paper Info
Title
Modeling anisotropic surface reflectance with example-based microfacet synthesis
Abstract
We present a new technique for the visual modeling of spatiallyvarying anisotropic reflectance using data captured from a single view. Reflectance is represented using a microfacet-based BRDF which tabulates the facets' normal distribution (NDF) as a function of surface location. Data from a single view provides a 2D slice of the 4D BRDF at each surface point from which we fit a partial NDF. The fitted NDF is partial because the single view direction coupled with the set of light directions covers only a portion of the "half-angle" hemisphere. We complete the NDF at each point by applying a novel variant of texture synthesis using similar, overlapping partial NDFs from other points. Our similarity measure allows azimuthal rotation of partial NDFs, under the assumption that reflectance is spatially redundant but the local frame may be arbitrarily oriented. Our system includes a simple acquisition device that collects images over a 2D set of light directions by scanning a linear array of LEDs over a flat sample. Results demonstrate that our approach preserves spatial and directional BRDF details and generates a visually compelling match to measured materials.
Year
DOI
Venue
2008
10.1145/1399504.1360640
ACM Trans. Graph.
Keywords
Field
DocType
texture synthesis,normal distribution,computational photography,image based rendering,data capture
Bidirectional reflectance distribution function,Normal distribution,Anisotropy,Computer graphics (images),Similarity measure,Computer science,Azimuth,Artificial intelligence,Image-based modeling and rendering,Texture synthesis,Computer vision,Computational photography,Optics
Journal
Volume
Issue
ISSN
27
3
0730-0301
Citations 
PageRank 
References 
41
1.28
33
Authors
5
Name
Order
Citations
PageRank
Jiaping Wang154927.25
Shuang Zhao235826.74
Xin Tong32119127.72
John Snyder42579172.17
Baining Guo53970194.91