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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 8 — Mar. 10, 2001
  • pp: 1207–1215

Phase-unwrapping algorithm based on frequency analysis for measurement of a complex object by the phase-measuring-profilometry method

Lian Xue and Xianyu Su  »View Author Affiliations


Applied Optics, Vol. 40, Issue 8, pp. 1207-1215 (2001)
http://dx.doi.org/10.1364/AO.40.001207


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Abstract

A new phase-unwrapping algorithm based on fringe frequency analysis is presented that will achieve greater automation and precision in measuring complex objects by phase-measuring profilometry (PMP). The new algorithm, which combines digital weighted filtering in the frequency domain and modulation ordering in the spatial domain, can recognize corrupt pixels automatically and produce a better phase-unwrapping path. By frequency weighted filtering, the analysis of fringe frequency is converted into the analysis of fringe modulation. Then, based on a strong correlation between local spatial frequency and the reliability of phase data, ordering of the filtered modulation produces an optimized unwrapping path. Simulation and experiments verify the new algorithm.

© 2001 Optical Society of America

OCIS Codes
(070.2590) Fourier optics and signal processing : ABCD transforms
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(150.6910) Machine vision : Three-dimensional sensing

History
Original Manuscript: July 13, 2000
Revised Manuscript: November 13, 2000
Published: March 10, 2001

Citation
Lian Xue and Xianyu Su, "Phase-unwrapping algorithm based on frequency analysis for measurement of a complex object by the phase-measuring-profilometry method," Appl. Opt. 40, 1207-1215 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-8-1207

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