摘要
点扩散函数(PSF)能够完整表征物空间一点发出的光经过相机系统在像空间的分布特性,是反映相机性能的关键参数,也是进行图像复原的重要依据。针对星载TDI CCD静态PSF单一刃边法测量时初始相位无法确定、采样点少的问题,提出一套多相位刃边靶标设计及数据处理方法。对多相位刃边法和矩形靶标刃边法静态PSF测量进行蒙特卡洛仿真,结果表明本文提出的方法测量相对误差小于2%,且结果稳定,而矩形靶标单一刃边法测量相对误差约10%。将该方法用于高分二号全色相机的静态PSF测试,利用双星点靶标对结果进行验证,证明了该方法在星载TDI CCD静态PSF测试工程应用中的可行性。
Point Spread Function（PSF） is an important parameter indicating performance of camera and the important basis for image restoration. In order to solve the problem of uncertainty of initial phase and lack of sample points with single knife-edge, a new method named multi-phase-knife is proposed including design and data processing. Simulation result of two PSF measurement methods based on Monte-Carlo method show that relative measurement error of this method is steady and fewer than 2% by contrast, and relative measurement error of single knife-edge is only about 10%. This method is used in PSF measurement of GF-2 pan-chromatic camera, and the result is validated by double-point, which provides references of engineering application for TDI-CCD PSF measurement.
出处
《光电工程》
CAS
CSCD
北大核心
2016年第6期13-18,共6页
Opto-Electronic Engineering
基金
高分辨率对地观测系统重大专项基金资助项目(50-Y20A08-0508-15/16)
