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. 2022 Aug 16;11:254. doi: 10.1038/s41377-022-00949-8

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Fig. 1 — a the raw input holograms are captured at different sample-to-sensor distances z_2,i, i = 1,…,M. b The structure of the SPAF Module, where W stands for the element-wise multiplication in the frequency domain (see the Methods section for details)