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1 Optica Applicata

1 2023

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Phase retrieval without phase unwrapping for white blood cells in deep-learning phase-shifting digital holography

Jin Shuyang, Xu Xiaoqing, Chen Jili, Ni Yudan

Optica Applicata

2023

Vol. 53, nr 1

127--140

Phase retrieval and phase unwrapping are the two important problems for enabling quantitative phase imaging of cells in phase-shifting digital holography. To simultaneously cope with these two problems, a deep-learning phase-shifting digital holography method is proposed in this paper. The proposed method can establish the continuous mapping function of the interferogram to the ground-truth phase using the end-to-end convolutional neural network. With a well-trained deep convolutional neural network, this method can retrieve the phase from one-frame blindly phase-shifted interferogram, without phase unwrapping. The feasibility and applicability of the proposed method are verified by the simulation experiments of the microsphere and white blood cells, respectively. This method will pave the way to the quantitative phase imaging of biological cells with complex substructures.