Abstract
In this paper, to reduce the non-linear phase error caused by gamma effect of the digital projector, a novel phase difference extraction method is proposed. First, through multi-layer discrete wavelet decomposition (DWT), the compo-nents of the original phase difference at different frequencies are extracted. Subsequently, the effective components are taken by the orthogonal matching pursuit (OMP) algorithm, and the phase difference is reconstructed. According to the upper and lower envelopes of the original phase difference extracted by cubic spline interpolation, the residual threshold of OMP is set. According to the results of three-dimensional (3-D) reconstruction experiment on a standard sphere, the proposed method is capable of reducing the errors in the original phase difference and achieving a better imaging result.
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This work has been supported by the National Natural Science Foundation of China (No.61873333), the Fundamental Research Funds of Shandong University in China (No.2018JCG06), the Shandong Provincial Natural Science Foundation of China (Nos.ZR2017PEE023 and ZR2017BF007), the National Key Research and Development Project (No.2018YFE02013), the Key Research and Development Plan of Shandong Province (No.2017CXGC0610), and the Young Scholars Program of Shandong University (No.2016WLJH30).
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Lü, Ss., Jiang, Ms., Su, Ch. et al. Novel phase difference extraction method of FPP system based on DWT and OMP algorithm. Optoelectron. Lett. 16, 131–136 (2020). https://doi.org/10.1007/s11801-020-9159-1
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DOI: https://doi.org/10.1007/s11801-020-9159-1