摘要
混合地表的温度场分布是目标与背景红外辐射特性研究的难点问题,针对该问题建立了土壤与植被混合型地表的红外辐射温度场理论模型.在分析了影响温度场分布因素的基础上,根据植被覆盖率范围给出了混合地表的定义.结合土壤和植被温度场各自的统计分布特性,对混合地表温度场的标准方差和相关长度等参数进行了分析,给出了这些参数随植被覆盖率的变化特性,为红外场景的仿真和混合地表的红外纹理生成提供了理论依据.
The temperature field of the mixed terrain is one of the key problems in the study of infrared radiance characteristics of a target and background. A model of the infrared radiant temperature field of the mixed terrain of soil-vegetation is studied. After analyzing the affecting factors to the temperature field, the mixed terrain of soil-vegetation is defined according to the scope of the coverage fraction of the vegetation. The standard variation and the correlation length of the temperature field of the mixed terrain are analyzed on the basis of the temperature field statistical characteristics of soil and vegetation, respectively. Finally, the changes in these statistical parameters with the coverage fraction of vegetation are discussed, which can provide theoretical basis for infrared scenes simulation and infrared texture generation of the mix terrain. It can be applied to the fields of infrared dynamic scenes simulation and satellite remote scenes efficiently.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2009年第1期122-126,共5页
Journal of Xidian University
基金
国家自然科学基金资助(60407012)
关键词
混合型地表
土壤-植被
温度场
覆盖率
mixed terrain
soil-vegetation
temperature field
coverage fraction
