遥感影像地形与大气校正系统设计与实现

遥感影像地形和大气校正是提高定量化遥感数据处理精度的重要因素。目前的数据处理软件系统集成了一些地形和大气校正算法,但在应用中还存在不能获取重要的地形参数(如阴影因子、天空可视因子等),需提供精准DEM和校正方法基于朗伯体地表假设等问题。为应对遥感专业用户需求,设计并实现了遥感影像地形与大气校正软件系统,用以对影像进行地形辐射校正、获取DEM数据和相关地形参数、地形与大气校正等。介绍了系统的功能模块设计并展示了系统的原型版本,并应用系统中的地形和大气校正方法获取了HJ/CCD影像和Landsat/TM影像的反射率。校正结果表明:该系统中的BRDF模型能够有效消除地形影响。系统的实现可以为遥感科学研究和应用提供支撑。

Design and Realization of Topographic and Atmospheric Correction System for Remote Sensing Image

The topographic correction of remote sensing images is an important factor of improving the precision of quantitative remote sensing data processing.Some topographic and atmospheric correction algorithms have been integrated in the current data\|processing software systems.However,there are still some problems for their operational applications.We are unable to obtain the important terrain parameters ( i.e.shadow factor,sky view factor),so need to provide an accurate DEM.The correction algorithms are also based on the assumption that the land surface is Lambertian in the applications.To meet the requirement of professional users of Remote sensing,this paper designed and realized a topographic and atmospheric correction system for remote sensing images.The system aims to provide radiation correction,obtaining DEM and its correlative terrain parameters,topographic and atmospheric correction for remote sensing image.This paper presented the design of function modules and a prototype version of the system.Based on the topographic and atmospheric correction methods showed in this paper,the reflectance of HJ/CCD and LANDSAT/TM images were obtained.The results showed that the BRDF method of the system can eliminate the effect of topography.This system can support the research and application of remote sensing science.