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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 2 — Jan. 15, 2007
  • pp: 127–129

Sequential demodulation of a single fringe pattern guided by local frequencies

Qian Kemao and Seah Hock Soon  »View Author Affiliations


Optics Letters, Vol. 32, Issue 2, pp. 127-129 (2007)
http://dx.doi.org/10.1364/OL.32.000127


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Abstract

A simple but effective approach for the demodulation of a single fringe pattern is proposed. The phase with an undetermined sign is directly obtained by taking the arccosine value of a preprocessed fringe pattern. The local frequencies, also with an undetermined sign, are then estimated by local matching. The sign ambiguity is then removed simply by forcing the continuity of the local frequencies. The priority of sign determination is guided by the value of total local frequency (fringe density) so that the critical points are processed last. The proposed approach is verified by successful demodulation of a simulated fringe pattern and two experimental fringe patterns.

© 2006 Optical Society of America

OCIS Codes
(100.2650) Image processing : Fringe analysis
(100.5070) Image processing : Phase retrieval
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3940) Instrumentation, measurement, and metrology : Metrology

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 5, 2006
Revised Manuscript: October 13, 2006
Manuscript Accepted: October 15, 2006
Published: December 23, 2006

Citation
Qian Kemao and Seah Hock Soon, "Sequential demodulation of a single fringe pattern guided by local frequencies," Opt. Lett. 32, 127-129 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-2-127

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