Open AccessRobust phase unwrapping algorithm for noisy and segmented phase measurements
Author(s) -
Yi Zong,
Mingliang Duan,
Caiyun Yu,
Jianxin Li
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.432671
Subject(s) - robustness (evolution) , phase unwrapping , extrapolation , algorithm , computer science , phase (matter) , phase retrieval , phase noise , noise (video) , optics , interferometry , computer vision , mathematics , fourier transform , image (mathematics) , physics , mathematical analysis , biochemistry , chemistry , quantum mechanics , gene
This paper proposes a robust phase unwrapping algorithm (RPUA) for phase unwrapping in the presence of noise and segmented phase. The RPUA method presents a new model of phase derivatives combined with error-correction iterations to achieve an anti-noise effect. Moreover, it bridges the phase islands in the spatial domain using numerical carrier frequency and fringe extrapolation thus eliminating height faults to enable solving segmented phase unwrapping. Numerical simulation and comparison with three conventional methods were performed, proving the high robustness and efficiency of the RPUA. Further, three experiments demonstrated that the RPUA can obtain the unwrapped phase under different noise accurately and possesses the capability to process segmented phases, indicating reliable practicality.