University of Wollongong
Browse

File(s) not publicly available

A two-step phase-shifting algorithm dedicated to fringe projection profilometry

journal contribution
posted on 2024-11-17, 16:19 authored by Yongkai Yin, Jiaqi Mao, Xiangfeng Meng, Xiulun Yang, Ke Wu, Jiangtao Xi, Baoqing Sun
Improving the time efficiency of fringe projection profilometry (FPP) is an attractive problem. For FPP using phase-shifting, it is desired to improve the efficiency by reducing the step number for phase retrieval. This paper proposes a two-step phase-shifting algorithm dedicated to FPP. Considering the physical process of FPP, the captured fringe image is formulated with two variables, i.e. surface reflectance and phase value. And a phase shift is introduced to get the two equations, which lead to the close-form solution for phase calculation. Then the phase error due to ambient light is analyzed via a line-circle model, and an algorithm of refining the phase calculation is proposed based on the estimation of the actual fringe contrast. The validity of the proposed approach is demonstrated with experiments.

Funding

National Natural Science Foundation of China (2018GGX101002)

History

Journal title

Optics and Lasers in Engineering

Volume

137

Language

English

Usage metrics

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC