Optimizing Single-Shot Coherent Power-Spectrum Scattering Imaging Adaptively by Tuning Feedback Coefficient for Practical Exposure Conditions

Applied Sciences

Wei Wang¹  Yanfang Guo¹  Mengzhu Li¹  Junli Qi²  Mengjun Zhu²  Wenjun Yi²  Xiujian Li²  Jubo Zhu²  Wusheng Tang² 

[1] College of Computer and Communication Engineering, Changsha University of Science and Technology, Changsha 410114, China;College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China;

关键词: scattering imaging;    coherent diffraction imaging;    hybrid input and output (HIO) algorithm;    phase retrieval;    exposure condition;   

DOI  :  10.3390/app9183676

来源: DOAJ

【 摘 要 】

With only one piece of the power-spectrum pattern, the single-shot coherent power-spectrum imaging can provide a clear object image for real-time applications even if the object is hidden by opaque scattering media, in which the feedback coefficient β value for the reconstruction with least retrievals and fastest speed has to be pre-estimated through time-consuming iterative loops. Here we report a method for estimating the optimal β value from the captured raw power-spectrum images adaptively to optimize the single-shot coherent power-spectrum imaging for practical exposure conditions. The results demonstrate that, based on exposure level analysis of the captured raw power-spectrum images even of underexposure, moderate exposure, and overexposure cases, the β value could be quickly determined with a compact expression for the algorithm to achieve clear reconstruction output efficiently. The proposed method helps to push ahead of the coherent diffractive imaging devices for real-time imaging through turbid mediums in Artificial Intelligence (AI), driving assistance, and flight assistance applications.

【 授权许可】

Unknown