一种基于照度随天顶角变化规律的卫星微光图像光度校正算法  

A Kind of Satellite Low-Light Image Luminosity Correction Algorithm Based on the Illuminance Varying with the Zenith Angle

作　　者：孙建锟 SUN Jiankun(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing,100094 China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing,100049 China;Key Laboratory of Technology in Geo-spatial Information Processing and Application System,Chinese Academy of Sciences,Beijing,100190 China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学电子电气与通信工程学院,北京100049 [3]中国科学院空间信息处理与应用系统技术重点实验室,北京100190

出　　处：《科技创新导报》2021年第29期98-105,共8页Science and Technology Innovation Herald

摘　　要：本文提出一种改进的卫星微光图像光度校正算法,用以改善微光卫星的产品质量。星载微光成像系统能够在晨昏附近区域获取大量信息,但该区域内图像动态范围极大,光照强度变化成为图像信号的主要成分,需要进行光度校正处理。国际现有的微光图像光度校正算法技术不公处理的效果也不理想。本文提出一种根据太阳天顶角调整增益的卫星微光图像光度校正算法,用以改善微光卫星的产品质量。In this paper,it proposes an improved satellite low-light-level image luminosity correction algorithm to improve the product quality of low-light-level satellites.The satellite-borne low-light-level imaging system can obtain a large amount of information in the vicinity of the dawn and dusk,but the dynamic range of the image in this area is extremely large,and the change of light intensity becomes the main component of the image signal,which requires photometric correction processing.The existing international low-light-level image luminosity correction algorithm technology does not work well.The paper proposes a satellite low-light-level image luminosity correction algorithm that adjusts the gain according to the sun's zenith angle to improve the product quality of low-light-level satellites.

关 键 词：微光卫星 光度校正 大气辐射 遥感图像处理 

分 类 号：P412.27[天文地球—大气科学及气象学]