13 September 2012 Illumination-invariant phase-shifting algorithm for three-dimensional profilometry of a moving object
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Abstract
Uneven illumination is a common problem in practical optical systems designed for machine vision applications, and it leads to significant errors when phase-shifting algorithms (PSA) are used to reconstruct the surface of a moving object. We propose an illumination-reflectivity-focus model to characterize this uneven illumination effect on phase-measuring profilometry. With this model, we separate the illumination factor effectively and consider the phase reconstruction from an optimization perspective. Furthermore, we formulate an illumination-invariant phase-shifting algorithm (II-PSA) to reconstruct the surface of a moving object under an uneven illumination environment. Experimental results show that it can improve the reconstruction quality both visually and numerically.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Fuqin Deng, Fuqin Deng, Chang Liu, Chang Liu, Wuifung Sze, Wuifung Sze, Jiangwen Deng, Jiangwen Deng, Kenneth S. M. Fung, Kenneth S. M. Fung, Winghong Leung, Winghong Leung, Edmund Y. Lam, Edmund Y. Lam, } "Illumination-invariant phase-shifting algorithm for three-dimensional profilometry of a moving object," Optical Engineering 51(9), 097001 (13 September 2012). https://doi.org/10.1117/1.OE.51.9.097001 . Submission:
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