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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 15, Iss. 12 — Dec. 1, 1998
  • pp: 2966–2975

Matching photometric-stereo images

José R. A. Torreão and João L. Fernandes  »View Author Affiliations


JOSA A, Vol. 15, Issue 12, pp. 2966-2975 (1998)
http://dx.doi.org/10.1364/JOSAA.15.002966


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Abstract

We introduce a new process of shape estimation through the matching of photometric-stereo images, which are monocular images obtained under different illuminations. If the illumination directions are not far apart, and if the imaged surface is smooth, so that a linear approximation to the reflectance map is applicable, the disparities produced by the matching process can be related to the depth function of the imaged surface through a differential equation whose approximate solution is easily found. We thus obtain a closed-form expression for surface depth, depending only on the coefficients of the linear-reflectance-map function. If those coefficients are not available, a simple iterative scheme still allows the recovery of depth, up to an overall scale factor.

© 1998 Optical Society of America

OCIS Codes
(150.0150) Machine vision : Machine vision
(150.4620) Machine vision : Optical flow
(330.1400) Vision, color, and visual optics : Vision - binocular and stereopsis

History
Original Manuscript: October 20, 1997
Revised Manuscript: August 10, 1998
Manuscript Accepted: August 11, 1998
Published: December 1, 1998

Citation
José R. A. Torreão and João L. Fernandes, "Matching photometric-stereo images," J. Opt. Soc. Am. A 15, 2966-2975 (1998)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-15-12-2966

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