Intensity-ratio error compensation for triangular-pattern phase-shifting profilometry
JOSA A, Vol. 24, Issue 10, pp. 3150-3158 (2007)
http://dx.doi.org/10.1364/JOSAA.24.003150
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Abstract
We present an intensity-ratio error-compensation method to decrease the measurement error caused by projector gamma nonlinearity and image defocus in triangular-pattern phase-shifting profilometry. The intensity-ratio measurement error is first determined by simulating the measurement with the triangular-pattern phase-shifting method with ideal and real captured triangular-pattern images based on the ideal and real gamma nonlinearity functions. A lookup table that stores the intensity-ratio measurement error corresponding to the measured intensity ratio is constructed and used for intensity-ratio error compensation. Experiments demonstrated that the intensity-ratio error compensation method significantly reduced the measurement error in the triangular-pattern phase-shifting method by 28.5%.
© 2007 Optical Society of America
OCIS Codes
(110.6880) Imaging systems : Three-dimensional image acquisition
(120.2830) Instrumentation, measurement, and metrology : Height measurements
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(150.6910) Machine vision : Three-dimensional sensing
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: November 14, 2006
Revised Manuscript: May 28, 2007
Manuscript Accepted: June 26, 2007
Published: September 13, 2007
Citation
Peirong Jia, Jonathan Kofman, and Chad English, "Intensity-ratio error compensation for triangular-pattern phase-shifting profilometry," J. Opt. Soc. Am. A 24, 3150-3158 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-10-3150
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