双光源虹膜防散焦成像及特征增强方法  

Anti-defocus iris imaging and feature enhancement method through double-light source

作　　者：王晟轶 韩源平[1] WANG Sheng-yi;HAN Yuan-ping(College of Life Science,Sichuan University,Chengdu 610000,China)

机构地区：[1]四川大学生命科学学院,四川成都610000

出　　处：《计算机工程与设计》2023年第6期1775-1780,共6页Computer Engineering and Design

摘　　要：为解决特征图像采集过程中的散焦和图像增强问题,研究基于光斑特征分析的自适应图像复原和增强方法,提出一种基于光斑点的人机交互和图像复原解决方案。在不改变成像系统技术结构、不提高成本的前提下,显著降低散焦程度,清除散焦对图像质量的影响;利用约束最小二乘滤波器进行散焦图像的进一步复原,得到有效的适用于编码和识别的排序测度特征。实验结果表明,该方法可以大幅度提升成像图像质量,在增强编码处理后,提供优质的虹膜特征数据,为下一步虹膜图像编码和识别提供支撑。In allusion to the problem of the defocus in the process of feature image acquisition,the difficulties in iris imaging process were studied and the adaptive method of image restoration and enhancement of the focal iris image was explored,an interactive image restoration solution based on light spot without changing the imaging system technical structure and obviously raising the cost was proposed.It reduced the incidence of defocusing occurring significantly and the defecy of defocus,and the effect of defocusing on image quality was decreased.Experimental results verify that this method can help locating the distance and the site of human-computer interaction,and promote the quality of iris imaging greatly.

关 键 词：生物特征 身份认证 虹膜图像编码 散焦 景深 特征增强 交互接口 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]