多通道TDICCD成像系统的非均匀性校正:多通道TDICCD成像系统的非均匀性校正
Correction of non-uniformity response for multiple output TDI CCD imaging system
下载全文
作 者:郑亮亮
Zheng Liangliang (National & Local United Engineering Research Center of Small Satellite Technology, Changchun Institute of Optics fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China)
机构地区:中国科学院长春光学精密机械与物理研究所小卫星技术国家地方联合工程研究中心,吉林长春130033
出 处:《红外与激光工程》 EI CSCD 2014年第43卷第B12期 145-150页,共6页
Infrared and Laser Engineering
基 金:国家863计划(2012AA121502)
摘 要:为解决多通道TDI CCD成像系统响应非均匀的问题,根据成像系统视频信号的处理流程,详细分析了影响成像系统响应非均匀性的各个因素,对比了当前主要的非均匀性校正处理方法,提出了改进单点校正法,其集成了单点校正法与两点校正法的优点,具有算法简单,效率高,实用性强,测试工作量小等特点,利用该方法对系统所采集的图像进行非均匀校正,试验结果表明,系统响应的非均匀性由3.5%降低至1.5%,在系统响应全部灰度范围内,最大的非均匀性小于2.5%,满足成像系统的使用要求。
To solve the non-uniformity response of multiple outputs in TDI CCD imaging systems, every factors that may influence the non-uniformity response were analyzed in detail according to the flow of video signal process. Compared with popular correction methods of non-uniformity response, an improved method based on single point calibration was proposed, which integrated the advance of single-point correction and two-point correction methods. The improved single-point method has the features of simple algorithm, high efficiency, good practical application, low work of measurement, and so on. The results of experiments show that the non-uniformity response of TDI CCD imaging system declines from3.5% to 1.5% according to the images using the improved method of single point calibration. The maximum of non-uniformity responses among multiple outputs is less than 2.5% during the full response range. The improved method of single-point calibration can satisfy the requirements of TDI CCD image systems and be practical in engineering.
关键词:TDI CCD 成像系统 非均匀性校正 改进单点法
TDI CCD ; imaging system ; non-uniformity correction ; improved single-point method ;