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Comparison of the squared binary, sinusoidal pulse width modulation, and optimal pulse width modulation methods for three-dimensional shape measurement with projector defocusing |
Applied Optics, Vol. 51, Issue 7, pp. 861-872 (2012)
http://dx.doi.org/10.1364/AO.51.000861
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Abstract
This paper presents a comparative study on three sinusoidal fringe pattern generation techniques with projector defocusing: the squared binary defocusing method (SBM), the sinusoidal pulse width modulation (SPWM) technique, and the optimal pulse width modulation (OPWM) technique. Because the phase error will directly affect the measurement accuracy, the comparisons are all performed in the phase domain. We found that the OPWM almost always performs the best, and SPWM outperforms SBM to a great extent, while these three methods generate similar results under certain conditions. We will briefly explain the principle of each technique, describe the optimization procedures for each technique, and finally compare their performances through simulations and experiments.
© 2012 Optical Society of America
OCIS Codes
(100.5070) Image processing : Phase retrieval
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: August 22, 2011
Revised Manuscript: November 7, 2011
Manuscript Accepted: November 9, 2011
Published: February 24, 2012
Citation
Yajun Wang and Song Zhang, "Comparison of the squared binary, sinusoidal pulse width modulation, and optimal pulse width modulation methods for three-dimensional shape measurement with projector defocusing," Appl. Opt. 51, 861-872 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-7-861
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