Abstract
To overcome the invalid phase and phase jump phenomenon generated during the phase unwrapping, a phase error correction method based on the Gaussian filtering algorithm and intensity variance is proposed in this paper. First, a threshold of fringe intensity variance is set to identify and clear the phase in the invalid region. Then, the Gaussian filtering algorithm is employed to correct the phase order at the fringe junction, and then the absolute phase is corrected. Finally, the phase correction experiments of different geometric objects are carried out to verify the feasibility and accuracy of the proposed method. The method proposed in this paper can be extended to the correction of absolute phase error obtained by any coding method.
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This work has been supported by the National Natural Science Foundation of China (Nos.61873333 and 61903225), the Fundamental Research Funds of Shandong University in China (No.2018JCG06), the Shandong Provincial Natural Science Foundation in China (Nos.ZR2017PEE023 and ZR2017BF007), the National Key Research and Development Project (No.2018YFE02013), the Key Research and Development Plan of Shandong Province (No.2019TSLH0301), and the Young Scholars Program of Shandong University (No.2016WLJH30).
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Gu, Qq., Lü, Ss., Jiang, Ms. et al. Phase error correction method based on the Gaussian filtering algorithm and intensity variance. Optoelectron. Lett. 17, 221–225 (2021). https://doi.org/10.1007/s11801-021-0009-6
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DOI: https://doi.org/10.1007/s11801-021-0009-6