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Motion induced phase error reduction using a Filbert transform
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DOI：10.1364/OE.26.034224.png)
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Abstract
En 中文
Object motion can introduce phase error and thus measurement error for phase-shifting profilometry. This paper proposes a generic motion error compensation method based on our finding that the dominant motion-introduced phase error doubles the frequency of the projected fringe frequency, and the Hilbert transform shifts the phase of a fringe pattern by pi/2. We apply a Hilbert transform to phase-shifted fringe patterns to generate another set of fringe patterns, calculate one phase map using the original fringe patterns and another phase map using Hilbert transformed fringe patterns, and then use the average of these two phase maps for three-dimensional reconstruction. Both simulation and experiments demonstrated that the proposed method can substantially reduce motion-introduced measurement error. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keywords:
3-D SHAPE MEASUREMENT
PROFILOMETRY
ACCURACY
Journal
IF:
3.3
Papers:
6.1W
Citations:
14.3W
