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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 1 — Jan. 1, 2007
  • pp: 36–43

Generic nonsinusoidal phase error correction for three-dimensional shape measurement using a digital video projector

Song Zhang and Shing-Tung Yau  »View Author Affiliations

Applied Optics, Vol. 46, Issue 1, pp. 36-43 (2007)

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A structured light system using a digital video projector is widely used for 3D shape measurement. However, the nonlinear γ of the projector causes the projected fringe patterns to be nonsinusoidal, which results in phase error and therefore measurement error. It has been shown that, by using a small look-up table (LUT), this type of phase error can be reduced significantly for a three-step phase-shifting algorithm. We prove that this algorithm is generic for any phase-shifting algorithm. Moreover, we propose a new LUT generation method by analyzing the captured fringe image of a flat board directly. Experiments show that this error compensation algorithm can reduce the phase error to at least 13 times smaller.

© 2007 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: May 30, 2006
Revised Manuscript: September 3, 2006
Manuscript Accepted: September 7, 2006

Song Zhang and Shing-Tung Yau, "Generic nonsinusoidal phase error correction for three-dimensional shape measurement using a digital video projector," Appl. Opt. 46, 36-43 (2007)

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