摘要
提出一种结合DEM的山体阴影检测与地形辐射校正方法。首先对卫星影像多波段信息用特征法进行阴影检测,然后结合DEM数据用模型法进行山体背阴面检测以及投影区域检测,将3个结果综合分析,按照形成原因将阴影检测结果分为8类,最后结合太阳入射角信息,利用信息匹配的阴影补偿法和地形辐射校正物理模型,进行卫星光学遥感影像辐射校正。试验证明该方法能恢复山体阴影区的信息,并且有效降低地形效应的影响。
A shadow detection and topography correction method based on DEM is proposed.Firstly,characteristic method is used to detect the shadow area in the satellite imagery.Then the shady slope and cast shadow area can be detected by model method using DEM data.The shadow is divided into 8 categories with the cause of formation.And then,the compensation method of shadow area and topography correction model are used to correct the optical remote sensing satellite imagery.The results suggest that the proposed method can recover the shadow area information effectively and weaken the effect of terrain.
出处
《测绘学报》
EI
CSCD
北大核心
2018年第1期113-122,共10页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(41322010)~~
关键词
地形辐射校正
阴影检测
DEM
卫星光学遥感影像
topography correction
shadow detection
DEM
optical remote sensing satellite imagery
