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

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.