基于规范图像的光电成像系统采样响应研究  

Research on sampling response of electro-opticalimaging system based on canonical image

作　　者：王青松[1] 高明[1] WANG Qing-song;GAO Ming(School of Optoelectronic Engineering,Xi′an Technological University,Xi′an 710021,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《激光与红外》2023年第8期1227-1233,共7页Laser & Infrared

基　　金：陆军装备“十三五”预研项目(No.301XXX102)资助。

摘　　要：为了研究采样响应对光电成像系统生成图像的质量的影响,本文提出了将规范图像作为输入建立封闭的模型来分析采样响应的方法。首先给出了规范图像的定义并得到了USAF 1951规范图像的数学模型,然后分析了光电成像系统的采样响应过程和采样响应函数,最后讨论了USAF 1951规范图像在不同条件下的采样响应结果。研究结果表明:当采样前MTF截止频率、采样频率与采样后MTF截止频率之间的关系不同时,采样响应对像质的影响不同;当采样频率与采样前MTF截止频率满足一定的条件时,可在图像模糊与混叠之间取得平衡。In order to study the influence of sampling response on the quality of images generated by electro-optical imaging systems,a method to analyze the sampling response by building a closed model with the canonical image as an input is proposed in this paper.First,the definition of the canonical image and the mathematical model of the USAF 1951 canonical image are given,then the sampling response processand sampling response function of the electro-optical imaging system are analyzed,and finally the sampling response results of USAF 1951 canonical images under different conditions are discussed.The results show that when the relationship between pre-sampling MTF cutoff frequency,sampling frequency and post-sampling MTF cutoff frequency is different,the sampling response has different effects on image quality;when the sampling frequency and pre-sampling MTF cutoff frequency meet certain conditions,a balance between image blurring and blurring can be achieved.

关 键 词：规范图像 光电成像系统 采样响应 调制传递函数 

分 类 号：O435[机械工程—光学工程] TN29[理学—光学]