现代应用物理2025，Vol.16Issue(2)：62-70,9.DOI:10.12061/j.issn.2095-6223.202408008
一种环孔编码成像空间移变评估方法
A Spatial Shift-Variant Evaluation Method for Coded Ring-Aperture Imaging
摘要
Abstract
Ring-aperture coded imaging technology holds significant application value in nuclear safety monitoring and inertial confinement fusion(ICF)diagnostics.However,its spatial shift-variance induce distortion in the point spread function(PSF),leading to degraded reconstructed image quality.To address the limitations of traditional evaluation methods in characterizing annular features,an assessment method based on the Bhattacharyya coefficient and mean deviation of average annular region flux are proposed.By establishing a Monte Carlo simulation model of the ring-aperture imaging system,the spatial shift-variance of PSF under different offset magnitudes is investigated.The results show that compared with conventional structural similarity(SSIM)index-based methods,the proposed approach exhibits significantly enhanced sensitivity to spatial shift-variance,enabling precise detection of deformation features in annular flux regions.Threshold ranges for evaluation parameters are determined through correlation coefficient analysis of reconstructed images,thereby establishing a comprehensive quantitative evaluation framework for spatial shift-variance in ring-aperture coded imaging.This methodology provides an effective tool for assessing spatial shift-variance and offers novel theoretical insights for optimizing imaging system design.关键词
编码成像/环形编码孔/空间移变特性/巴氏系数Key words
coded aperture imaging/ring-aperture/spatial shift-variance/Bhattacharyya coefficient分类
医药卫生引用本文复制引用
李忠良,张栩彬,严明飞,温小梅,李小强,周琪军,屈方园..一种环孔编码成像空间移变评估方法[J].现代应用物理,2025,16(2):62-70,9.基金项目
国家自然科学基金资助项目(12475304) （12475304）
