数字全息散射成像中目标复原的仿真分析  

Simulation Analysis of Target Restoration in Digital Holographic Scattering Imaging

作　　者：徐美芳[1,2] 张湄婕 田二明[1] 王浩全 张敏娟[1,2] Xu Meifang;Zhang Meijie;Tian Erming;Wang Haoquan;Zhang MinJuan(Engineering and Technology Research Center of Shanxi Provincial for Optical-Electric Information and Instrument,North University of China,Taiyuan 030051,Shanxi,China;Academy for Advanced Interdisciplinary Research,North University of China,Taiyuan 030051,Shanxi,China;Institute of Swarm Intelligence and Control,Sichuan University,Chengdu 610000,Sichuan,China)

机构地区：[1]中北大学山西省光电信息与仪器工程技术研究中心,山西太原030051 [2]中北大学前沿交叉科学研究院,山西太原030051 [3]四川大学群体智能与控制研究所,四川成都610000

出　　处：《光学学报》2022年第20期55-64,共10页Acta Optica Sinica

基　　金：国家自然科学基金(61471325);山西省自然科学基金(201801D121160,201901D111145)。

摘　　要：透射散射成像中目标复原在生物医学、遥感和安防等领域备受关注。对在数字全息散射成像理论基础上构建的目标复原模型进行模拟仿真。针对模型中影响目标复原的关键因素,如激光光源的中心波长、目标尺寸、观测距离、散射介质特性和探测器的分辨率等进行系统仿真与分析。结果表明:激光光源的中心波长为635.5 nm,探测器的观测距离为50 cm、空间分辨率为512 pixel×512 pixel,散射片的均方根粗糙度为333μm,均方根粗糙度接近的条件下选择高斯随机分布模型的散射片更利于目标物的复原。该研究为应用于透射散射成像中图像复原系统的快速准确搭建提供了依据。Target restoration in transmission scattering imaging has attracted much attention in the fields of biomedicine,remote sensing,and security.In this paper,we construct a target restoration model based on the digital holographic scattering imaging theory.The key factors affecting the target restoration in the model are systematically simulated and analyzed,such as the center wavelength of the laser source,target size,observation distance,scattering medium characteristics,and detector resolution.The results show that the laser source with a central wavelength of 635.5 nm,a detector with an observation distance of 50 cm and a spatial resolution of 512 pixel×512 pixel,a diffuser with a root mean square roughness of 333μm,and the diffuser with Gaussian random distribution model under close root mean square roughness conditions,are more conducive to the target restoration.This research provides a basis for the rapid and accurate construction of an image restoration system applied in transmission scattering imaging.

关 键 词：成像系统 散射成像 数字全息 图像复原 

分 类 号：O438.1[机械工程—光学工程]