室内模拟环境下动态调制传递函数检测方法  

Test method of the dynamic modulation transfer function in an indoor analog environment

作　　者：张维光[1] 于洵[2] 韩峰[2] 张发强 吴银花 陈玉娇 Zhang Weiguang;Yu Xun;Han Feng;Zhang Faqiang;Wu Yinhua;Chen Yujiao(School of Optoelectronic Engineering,Xi’an Technological University,Xi’an 710021,China;School of Weapon Science and Technology,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 [2]西安工业大学兵器科学与技术学院,陕西西安710021

出　　处：《红外与激光工程》2022年第7期296-303,共8页Infrared and Laser Engineering

基　　金：国家自然科学基金(618051910);航空科学基金(202000190U1002)。

摘　　要：针对车载视觉智能感知、低空区域防务等光电成像系统远距离观测动态性能测评需求,研制了室内运动目标模拟系统。基于线性移不变系统模型,分析了“三杆靶”、“四杆靶”靶标MTF测量原理,提出了一种基于变频栅条靶标的动态MTF检测方法,给出了变频靶标设计方案和MTF解算方法。完成了“三杆靶”和变频靶标测量方法的静态和动态MTF对比测试实验。实验结果表明:提出的变频靶标动态MTF检测方法与“三杆靶”测量方法相比,在静态MTF检测时测量数据的相对最大偏差比率为1.9%,动态MTF检测时测量数据相对最大偏差比率为2.8%,是一种高精度数字化动态MTF检测方法。该方法可以从一幅靶标图像中解算出MTF曲线,在动态MTF检测技术领域比“刀口法”、“三杆靶”、“四杆靶”等方法更具优势。Aimed at the requirements of remote observation dynamic performance evaluation of photoelectric imaging systems such as vehicle visual intelligent perception and low altitude regional defense,an indoor simulated moving target system was developed.Based on the linear space shift invariant system model,the MTF measurement principles with ’’three-bar target’’ and ’’four-bar target’’ were analysed.A measurement method of the dynamic modulation transfer function(MTF) was proposed for an optoelectronic imaging system based on a variable frequency target.A design scheme of a variable frequency target was introduced,the solution method of MTF value was proposed,and the static and dynamic MTF comparative test experiments were conducted for’’three-bar target’’ and variable frequency target.The experimental results show that compared with the "three bar target" measurement method,the proposed frequency conversion target dynamic MTF measurement method has a relative maximum deviation ratio of 1.9% for static MTF measurement and 2.8% for dynamic MTF measurement.The method can solve the MTF curve from one target image and has more advantages than ’’knife edge method’’,’’three-bar target’’,’’four-bar target’’ and other methods in the field of dynamic MTF measurement technology.

关 键 词：光电成像系统 动态调制传递函数 变频栅条靶标 模拟运动目标系统 

分 类 号：TH741[机械工程—光学工程]