MScU-Net全息相位解包裹与像差同步求解

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关键词：数字全息显微；相位解包裹；像差补偿；多光谱通道注意力机制中图分类号：TH744；O436 文献标识码：Adoi：10.37188/OPE.20253315.2441 CSTR：32169.14.OPE.20253315.2441

MScU-Net for simultaneous phase unwrapping and aberration correction in digital holography

YANLiping，MIAO Xiaozhe，HUANG Liu*

（School of Information Science and Engineering（School of Cyber Science and Technology）， ZhejiangSci-TechUniversity，Hangzhou 3lOol8，China） * Corresponding author， E-mail： huangliu@zstu. edu. cn

Abstract： Phase retrieval in digital holographic microscopy contends with unwrapping errors induced by noise and phase distortions arising from aberrations. Traditional sequential approaches are constrained by limited computational eficiency and error propagation，motivating the development of synchronous solution paradigms.A multi-spectral channel U-Net（MScU-Net） is proposed for phase retrieval in digital holographic microscopy. The network embeds a Transformer-enhanced multi-spectral channel attention mechanism within a ResU-Net framework，enabling end-to-end nonlinear mapping that simultaneously performs phase unwrapping and aberration compensation directly from noisy，distorted wrapped phase maps. Experimental results demonstrate substantial improvements： peak signal-to-noise ratio （PSNR） attains 29.82 dB，structural similarity index measure （SSIM） is maintained at O.96，and background noise standard deviation（O. 0o0 4-O. O03 O rad） is reduced by 82.6%.95.8% relative to a state-of-the-art method.Step-height measurements show a systematic deviation of ⩽3.74% from white-light interferometry references，with local measurement fluctuations reaching sub-nanometer precision （ s=0.42nm ）.These findings indicate that MScU-Net offers an efective synchronous solution for accurate micro and nanoscale 3D topography measurement.

Key words： digital holographic microscopy； phase unwrapping；aberration correction；multi-spectral channel attention mechanism

1引言

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