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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 32 — Nov. 10, 2000
  • pp: 5998–6005

Rotation-invariant optical recognition of three-dimensional objects

José J. Esteve-Taboada, Javier García, and Carlos Ferreira  »View Author Affiliations


Applied Optics, Vol. 39, Issue 32, pp. 5998-6005 (2000)
http://dx.doi.org/10.1364/AO.39.005998


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Abstract

An automatic method for rotation-invariant three-dimensional (3-D) object recognition is proposed. The method is based on the use of 3-D information contained in the deformed fringe pattern obtained when a grating is projected onto an object’s surface. The proposed method was optically implemented by means of a two-cycle joint transform correlator. The rotation invariance is achieved by means of encoding with the fringe pattern a single component of the circular-harmonic expansion derived from the target. Thus the method is invariant for rotations around the line of sight. The whole experimental setup can be constructed with simple equipment. Experimental results show the utility of the proposed method.

© 2000 Optical Society of America

OCIS Codes
(100.4550) Image processing : Correlators
(100.5760) Image processing : Rotation-invariant pattern recognition
(100.6890) Image processing : Three-dimensional image processing

History
Original Manuscript: February 2, 2000
Revised Manuscript: June 21, 2000
Published: November 10, 2000

Citation
José J. Esteve-Taboada, Javier García, and Carlos Ferreira, "Rotation-invariant optical recognition of three-dimensional objects," Appl. Opt. 39, 5998-6005 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-32-5998

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