基于机载线阵光学载荷MTF评估算法的优化  

An Optimized MTF Assessment Algorithm based on Airborne Linear Array Optical Payload

作　　者：李传荣[1] 徐航[1,2] 李晓辉[1] 张静[1,2] 

机构地区：[1]中国科学院光电研究院定量遥感信息技术重点实验室,北京100094 [2]中国科学院大学,北京100049

出　　处：《遥感技术与应用》2013年第6期1006-1012,共7页Remote Sensing Technology and Application

基　　金：国家863计划项目"数据处理与科学分析系统技术研究"(2008AA121805);"对地观测载荷性能与数据质量检测关键技术"(2012AA12A302)

摘　　要：调制传递函数是目前国际上普遍使用的光学遥感载荷在轨运行性能的重要评价指标,而刃边法是评估中高分辨率光学载荷在轨MTF最普遍使用的方法。针对推扫型机载线阵光学遥感载荷成像特点,重点考虑姿态因素对算法评估精度的影响,对刃边算法进行调整和优化以适应推扫型机载线阵光学遥感载荷的MTF评估;还改进了精度分析方法,引入了载荷姿态影响因素,并利用真实载荷姿态数据生成仿真刃边图像对算法的有效性和评估精度进行了验证。MTF （Modulation Transfer Function） is an important indicator that is used to evaluate the per- formance of the optical remote sensing payload, and the knife-edge method has been used in high resolution optical remote sensing payload on-orbit MTF assessment widely. In this paper, the knife-edge method is im- proved by the MTF assessment of the Airborne Linear Array remote sensing optical payload. And an im- proved accuracy analysis method is given by the factors of attitude impacts. With this accuracy analysis method and the use of the real load gesture data,the simulated knife-edge images are made,and assessment accuracy of the improved algorithm is analyzed.

关 键 词：刃边法 MTF 机载线阵CCD 精度分析 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]