NDLI: Multiple light sources and reflectance property estimation based on a mixture of spherical distributions

Content Provider	IEEE Xplore Digital Library
Author	Hara, K. Nishino, K. Ikeuchi, K.
Copyright Year	2005
Description	Author affiliation: Dept. of Visual Commun. Design, Kyushu Univ. (Hara, K.)
Abstract	In tins paper we propose a new method for simultaneously estimating the illumination of the scene and the reflectance property of an object from a single image. We assume that the illumination consists of multiple point sources and the shape of the object is known. Unlike previous methods, we will recover not only the direction and intensity of the light sources, but also the number of light sources and the specular reflection parameter of the object. First, we represent the illumination on the surface of a unit sphere as a finite mixture of von Mises-Fisher distributions by deriving a spherical specular reflection model. Next, we estimate this mixture and the number of distributions. Finally, using this result as initial estimates, we refine the estimates using the original specular reflection model. We can use the results to render the object under novel lighting conditions
Sponsorship	IEEE Comput. Soc. Tech. Comm. on Pattern Anal. and Machine Intelligence
Starting Page	1627
Ending Page	1634
File Size	765893
Page Count	8
File Format	PDF
ISBN	076952334X
ISSN	15505499
DOI	10.1109/ICCV.2005.162
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Light sources Reflectivity Lighting Layout Optical reflection Rendering (computer graphics) Computer science Shape Computer vision Visual communication
Content Type	Text
Resource Type	Article
Subject	Computer Vision and Pattern Recognition Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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