NDLI: Determining Surface Orientations of Specular Surfaces by Using the Photometric Stereo Method

Content Provider	IEEE Xplore Digital Library
Author	Ikeuchi, Katsushi
Copyright Year	1979
Abstract	The orientation of patches on the surface of an object can be determined from multiple images taken with different illumination, but from the same viewing position. The method, referred to as photometric stereo, can be implemented using table lookup based on numerical inversion of reflectance maps. Here we concentrate on objects with specularly reflecting surfaces, since these are of importance in industrial applications. Previous methods, intended for diffusely reflecting surfaces, employed point source illumination, which is quite unsuitable in this case. Instead, we use a distributed light source obtained by uneven illumination of a diffusely reflecting planar surface. Experimental results are shown to verify analytic expressions obtained for a method employing three light source distributions.
Sponsorship	IEEE Computer Society
Starting Page	661
Ending Page	669
Page Count	9
File Size	3415786
File Format	PDF
ISSN	01628828
Volume Number	PAMI-3
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1981-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photometry Reflectivity Stereo vision Lighting Light sources Nonlinear equations Shape Partial differential equations Brightness Table lookup surface inspection Bin of bolts and nuts distributed light source glossy object reflectance map shape from shading
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Artificial Intelligence Computational Theory and Mathematics Computer Vision and Pattern Recognition Software

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