刃边法的MTF评价精度分析  

Accuracy of knife-edge method in MTF assessment

作　　者：刘亮 李显彬[2] 姜小光[3] 吴玮 张宝军 杨典华[4] 

机构地区：[1]民政部国家减灾中心,北京100124 [2]中国科学院光电技术研究所,成都610209 [3]中国科学院研究生院,北京100049 [4]首都师范大学,北京100048

出　　处：《中国科学院研究生院学报》2012年第6期786-792,共7页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家科技支撑计划(2008BAK49B01;2008BAK49B07)资助

摘　　要：通过开展仿真实验和理论分析,系统地研究大气、靶标倾角、靶标对比度和随机噪声、边缘探测精度和ERF拟合模型对调制传递函数(MTF)评价精度的影响,并对各种仿真参数下的MTF总体评价精度进行分析.分析结果对利用刃边法开展在轨MTF评价具有指导意义.Modulation transfer function（MTF） is a key parameter for assessment of the imaging performance of in-flight optical sensors.This study focuses on the influences of major factors on the accuracy of knife-edge method by using theoretical analysis and simulation experiments.The analyzed factors include atmosphere,the incline angle of target,the contrast and random noise of target,the edge detection accuracy,and the ERF curve-fitting model.Accuracies in MTF assessment under different simulation parameters are also analyzed.The analysis results are instructive for implementation of on-orbit MTF assessment using knife-edge method.

关 键 词：调制传递函数(MTF) 刃边法 仿真分析 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]