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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 22 — Nov. 15, 2010
  • pp: 3718–3720

Fast frequency-guided sequential demodulation of a single fringe pattern

Li Kai and Qian Kemao  »View Author Affiliations

Optics Letters, Vol. 35, Issue 22, pp. 3718-3720 (2010)

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Fast frequency-guided sequential demodulation (FFSD) for demodulating a single closed-fringe pattern is proposed as an improvement of frequency-guided sequential demodulation (FSD). Instead of using optimization to estimate the local frequencies for determining the sign of the phase, the FFSD estimates the local frequencies by directly calculating the gradient of the obtained phase with an undetermined sign. This improvement considerably reduces the computational complexity of the FSD and leads to a faster and simpler method. Simulated and experimental fringe patterns are used to test the proposed method and show that the demodulation speed of FFSD is about 150 times faster than that of the FSD, while the robustness and accuracy remain almost the same.

© 2010 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:
Image Processing

Original Manuscript: June 15, 2010
Revised Manuscript: October 9, 2010
Manuscript Accepted: October 9, 2010
Published: November 1, 2010

Li Kai and Qian Kemao, "Fast frequency-guided sequential demodulation of a single fringe pattern," Opt. Lett. 35, 3718-3720 (2010)

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