Phase-matching method based on optimization function for three-dimensional fringe projection

Kun Liu; Jun Yao; Yihao Zhou; Chen Sun; Jubing Chen

doi:10.1117/1.OE.57.10.104112

29 October 2018 Phase-matching method based on optimization function for three-dimensional fringe projection

Kun Liu, Jun Yao, Yihao Zhou, Chen Sun, Jubing Chen

Author Affiliations +

Optical Engineering, Vol. 57, Issue 10, 104112 (October 2018). https://doi.org/10.1117/1.OE.57.10.104112

Abstract

An optimization function-based phase-matching method is proposed for the three-dimensional (3-D) fringe projection method. As an essential procedure in 3-D fringe projection metrology, the phase-matching processing has a significant influence on the measurement accuracy. The traditional phase-matching method obtains the corresponding points in different images by comparing the phase-values directly, so its matching precision is easily affected by the phase-measurement error. The proposed method determines the corresponding points automatically and accurately by minimizing the cost function represented by the absolute phase values. The cost function consists of two parts: one for calculating the squared difference of the absolute phase to ensure matching precision, and the other is selected to guarantee optimization convergence. A series of experiments enable us to analyze the precision and effectiveness in practical application.

Citation Download Citation

Kun Liu, Jun Yao, Yihao Zhou, Chen Sun, and Jubing Chen "Phase-matching method based on optimization function for three-dimensional fringe projection," Optical Engineering 57(10), 104112 (29 October 2018). https://doi.org/10.1117/1.OE.57.10.104112

Received: 25 July 2018; Accepted: 9 October 2018; Published: 29 October 2018

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