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Proceedings Paper

Phase error correction based on Inverse Function Shift Estimation in Phase Shifting Profilometry using a digital video projector
Author(s): Yang Liu; Jiangtao Xi; Yanguang Yu; Joe Chicharo
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Paper Abstract

Fringe Pattern Profilometry (FPP) is 3D surface measuring technique based on triangulation. The utilization of digital projection in FPP system introduces significant phase distortion for Phase Shifting Profilometry (PSP), because of the nonlinear response of digital video projectors, which is referred as gamma distortion. Considering that the distorted phase has a stable function for a reference plane, this paper proposes an approach based on inverse function shift estimation (IFSE) to detect the spatial shift of the distorted phase caused by object height. This spatial shift is independent of projector's gamma distortion and accurate surface can be reconstructed based it. The simulation results show that the proposed method can almost completely eliminate gamma distortion in reconstructed surface and we obtain more than 5 times improvement in practical experiments.

Paper Details

Date Published: 11 November 2010
PDF: 8 pages
Proc. SPIE 7855, Optical Metrology and Inspection for Industrial Applications, 78550W (11 November 2010); doi: 10.1117/12.870369
Show Author Affiliations
Yang Liu, Univ. of Wollongong (Australia)
Jiangtao Xi, Univ. of Wollongong (Australia)
Yanguang Yu, Univ. of Wollongong (Australia)
Joe Chicharo, Univ. of Wollongong (Australia)

Published in SPIE Proceedings Vol. 7855:
Optical Metrology and Inspection for Industrial Applications
Kevin Harding; Peisen S. Huang; Toru Yoshizawa, Editor(s)

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