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Applied Optics

Applied Optics


  • Vol. 38, Iss. 2 — Jan. 10, 1999
  • pp: 370–381

Optical image recognition of three-dimensional objects

Ting-Chung Poon and Taegeun Kim  »View Author Affiliations

Applied Optics, Vol. 38, Issue 2, pp. 370-381 (1999)

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A three-dimensional (3-D) optical image-recognition technique is proposed and studied. The proposed technique is based on two-pupil optical heterodyne scanning and is capable of performing 3-D image recognition. A hologram of the 3-D reference object is first created and then is used to modulate spatially one of the pupils of the optical system; the other pupil is a point source. A 3-D target object to be recognized is then scanned in two dimensions by optical beams modulated by the two pupils. The result of the two-dimensional scan pattern effectively displays the correlation of the holographic information of the 3-D reference object and that of the 3-D target object. A strong correlation peak results if the two pieces of the holographic information are matched. We analyze the proposed technique and thereby lay a theoretical foundation for optical implementations of the idea. Finally, computer simulations are performed to verify the proposed idea.

© 1999 Optical Society of America

OCIS Codes
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(100.6890) Image processing : Three-dimensional image processing

Original Manuscript: May 20, 1998
Revised Manuscript: October 20, 1998
Published: January 10, 1999

Ting-Chung Poon and Taegeun Kim, "Optical image recognition of three-dimensional objects," Appl. Opt. 38, 370-381 (1999)

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