Self-Adaptive Threshold Reversal Algorithm for Phase Unwrapping in Quantitative Phase Contrast Imaging

LIN Panming; LUO Du; LI Jun; HUANG Zuohua

doi:10.6054/j.jscnun.2020073

Journal of South China Normal University (Natural Science Edition) > 2020 > 52(5): 19-25. > DOI: 10.6054/j.jscnun.2020073

LIN Panming, LUO Du, LI Jun, HUANG Zuohua. Self-Adaptive Threshold Reversal Algorithm for Phase Unwrapping in Quantitative Phase Contrast Imaging[J]. Journal of South China Normal University (Natural Science Edition), 2020, 52(5): 19-25. DOI: 10.6054/j.jscnun.2020073

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Self-Adaptive Threshold Reversal Algorithm for Phase Unwrapping in Quantitative Phase Contrast Imaging

School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China

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Received Date: January 20, 2020
Available Online: November 02, 2020

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Abstract

To solve the problems in quantitative phase contrast imaging such as the alternate increase and decrease between multi-peak phase distribution and wrapping phase distribution and the existence of multiple extremum points of the wrapping phase when the original phase exceeds the period π, a phase-unwrapping algorithm based on self-adaptive threshold reversal (SATR) is proposed. The algorithm realizes real phase reconstruction in quantitative phase contrast imaging. The realization of the principle of phase contrast imaging and the self-adaptive threshold reversal algorithm is analyzed, and the feasibility and accuracy of the method are proved through simulation verification calculation and comparison with Least-Square phase unwrapping algorithm (LS), Least-Square algorithm based on Lateral sheering interferometry (LSBLS) and Four-Direction Least-Square phase unwrapping algorithm based on Lateral shearing interferometry (FLSBLS). The algorithm improves the precision of phase unwrapping to some extent and provides a new idea for phase unwrapping under strong interference, demand for high precision and a large amount of calculation.
- self-adaptive threshold,
- phase reversal,
- phase unwrapping,
- quantitative phase contrast imaging,
- micro lens

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References

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