摘要
利用能量热平衡方程，将自然地表红外辐射统计特性及热图像空间结构与地表光学参数、热物性参数以及环境条件联系起来，描述了地表辐射温度统计函数和热图像自相关函数的变化规律．研究表明，地表辐射温度统计分布是地表特性参数的复杂函数，而地表热图像空间自相关函数，则是地表物性参数空间自相关函数的加权迭加；由于地表辐射温度统计函数和热图像自相关函数受环境条件和外部热源的影响，它们又都是时间的函数．
Based on the heat balance equation of natural terrain, the statistics of the IR radiance of and the spatial structure of thermal images of the wet surface are related to their optical and thermal parameters and atmospheric condition, which describe the statistical distribution of the radiative temperature and the spatial autocorrelation of the thermal image. It is shown that the distribution of the radiative temperature is a complex function of terrain physical parameters, and the spatial autocorrelation of the thermal image a weighted superposition of the spatial autocorrelation functions of the optical and thermal parameters. The changes of the atmospheric condition and the external heat source would lead to a time dependent radiance distribution and autocorrelation function.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
1999年第1期53-57,共5页
Journal of Xidian University
基金
国家自然科学基金
关键词
自然地表
红外辐射
热图像
统计分析
natural terrain IR radiance thermal image statistics
