28 January 2023 Generalized fringe order correction based on phase shift segmentation for absolute phase retrieval
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Abstract

We present a fringe order correction method for various absolute phase retrieval algorithms. In fringe projection profilometry based on absolute phase retrieval (FPP-APR), the mismatches tend to be easily generated around the 2π discontinuities or edges of the wrapped phase due to the defocus and noise of the system. In this paper, a staggered wrapped phase with a phase shift of 2π / N segments the calculated wrapped phase into a left-wrapped phase and a right-wrapped phase. Then, a statistical method independently determines the fringe order of each closed-wrapped phase without the 2π discontinuities. The experiments demonstrate that the proposed fringe order correction has the generality and simplicity for the existing absolute phase retrieval and performs high robustness to measure the colorfully complex objects of daily life.

© 2023 Society of Photo-Optical Instrumentation Engineers (SPIE)
Haihua An and Yiping Cao "Generalized fringe order correction based on phase shift segmentation for absolute phase retrieval," Optical Engineering 62(1), 014107 (28 January 2023). https://doi.org/10.1117/1.OE.62.1.014107
Received: 20 November 2022; Accepted: 5 January 2023; Published: 28 January 2023
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CITATIONS
Cited by 4 scholarly publications.
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KEYWORDS
Phase shifts

Phase retrieval

Discontinuities

Phase unwrapping

Tunable filters

Optical engineering

Digital filtering

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