NDLI: Enforcing integrability for surface reconstruction algorithms using belief propagation in graphical models

Content Provider	IEEE Xplore Digital Library
Author	Petrovic, N. Cohen, I. Frey, B.J. Koetter, R. Huang, T.S.
Copyright Year	2001
Description	Author affiliation: Beckman Inst., Illinois Univ., Urbana, IL, USA (Petrovic, N.; Cohen, I.; Frey, B.J.; Koetter, R.; Huang, T.S.)
Abstract	Accurate calculation of the three dimensional shape of an object is one of the classic research areas of computer vision. Many of the existing methods are based on surface normal estimation, and subsequent integration of surface gradients. In general, these methods do not produce valid surfaces due to violation of surface integrability. We introduce a new method for shape reconstruction by integration of valid surface gradient maps. The essence of the new approach is in the strict enforcement of the surface integrability via belief propagation across graphical models. The graphical model is selected in such a way as to extract information from underlying, possibly noisy, surface gradient estimators, utilize the surface integrability constraint, and produce the maximum a-posteriori estimate of a valid surface. We demonstrate the algorithm for two classic shape reconstruction techniques; shape-from-shading and photometric stereo. On a set of real and synthetic examples, the new approach is shown to be fast and accurate, in the sense that shape can be rendered even in the presence of high levels of noise and sharp occlusion boundaries.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Pattern Analysis & Machine Intelligence
File Size	712139
File Format	PDF
ISBN	0769512720
ISSN	10636919
DOI	10.1109/CVPR.2001.990550
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-12-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface reconstruction Reconstruction algorithms Belief propagation Graphical models Shape Noise shaping Computer vision Data mining Maximum a posteriori estimation Photometry
Content Type	Text
Resource Type	Article
Subject	Computer Vision and Pattern Recognition Software

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