成像系统的空变模型及其空域逆滤波  

Space-variant model of imaging and its inverse filtering in space domain

作　　者：徐伯庆[1] 李鑫欣[1] 

机构地区：[1]上海理工大学光学与电子信息工程学院,上海200093

出　　处：《仪器仪表学报》2006年第z3期2162-2163,2234,共3页Chinese Journal of Scientific Instrument

基　　金：上海理工大学博士启动基金X515资助

摘　　要：光学成像系统不可避免地存在着像差。本文首先对像差的特点进行了分析,并建立了相应的数学模型。该模型表明光学成像系统是空变的。在此基础上,提出了一种空域空变逆滤波方法,根据不同空间位置的点扩散函数进行相应的空域逆滤波。实验表明本文提出的针对空变成像系统的逆滤波方法具有优异的效果。The aberration can not be avoided in optical imaging systems. At first, the features of the aberration are analyzed and the corresponding mathematic model is established. The model shows that the optical imaging system is space-variant. Based on the model, an inverse filtering method in space domain is proposed, which, according the different point spread functions at each positions, do inverse filtering in space domain correspondingly. The experimental results show that the inverse filtering for the space-variant imaging system has excellent effects.

关 键 词：成像系统 空变系统 图像恢复 空域逆滤波 

分 类 号：TH7-55[机械工程—仪器科学与技术]