干旱区生态环境知识资源中心(Arid): 裸露起伏地表的BRDF模型

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	裸露起伏地表的BRDF模型
其他题名	BRDF Model of Bare Surface over Rugged Terrain
	黄珣 1; 白璐 2; 吴振森 2
来源期刊	光学学报
ISSN	0253-2239
出版年	2016
卷号	36 期号:1 页码:0129001-1-0129001-8
中文摘要	基于数字高程模型,建立起伏地形的三维网格模型。利用坡角及坡向得到坡面像元的平均法向,通过坐标系转换,计算任一坡面在局部坐标系下对应的太阳入射及观测几何。在可见光及近红外波段,考虑遮蔽效应,建立裸露起伏地表的双向反射分布函数(BRDF)模型,并以沙漠地区为例验证了该模型的正确性。研究了沙漠地区地表起伏程度及太阳天顶角对BRDF的影响,结果表明,在太阳几何一定的情况下,不同起伏地形的BRDF随观测方位角的变化呈不对称分布,且近垂直主平面方向的BRDF比近主平面方向整体偏大;对于同一地形,随着太阳天顶角增大,地表BRDF呈减小趋势。此外,随着波长增加,地表BRDF呈增大趋势。
英文摘要	A three-dimensional mesh model of rugged terrain is built based on the digital elevation model data. The average normal vector of each slope element is derived from its slope angle and aspect. Given the sun-view geometry in global system, the sun- view geometry of each slope element in local coordinate system can be calculated through coordinate conversion. Considering the shadowing effect, a bidirectional reflectance distribution function (BRDF) model of bare surface over rugged terrain is established in visible and near-infrared band. The validation of the model in desert area is conducted. The effect of the degree of surface relief and solar zenith angle on the model is studied. The results show that the tendency of BRDF varying with viewing azimuth angle of different rugged terrains has characteristic asymmetric distribution. BRDF in near perpendicular plane is larger than that in near principal plane. BRDF of the same rugged terrain decreases with the increase of solar zenith angle. BRDF tends to be larger as the wavelength increases.
中文关键词	散射 ; 双向反射分布函数 ; 数字高程模型 ; 裸露地表 ; 起伏地形
英文关键词	scattering bidirectional reflectance distribution function digital elevation model bare surface rugged terrain
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PHYSICS MULTIDISCIPLINARY ; OPTICS
WOS研究方向	Physics ; Optics
CSCD记录号	CSCD:5710797
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234446
作者单位	1.西安电子科技大学物理与光电工程学院, 西安, 陕西 710071, 中国; 2.西安电子科技大学物理与光电工程学院, 信息感知技术协同创新中心, 西安, 陕西 710071, 中国
推荐引用方式 GB/T 7714	黄珣,白璐,吴振森. 裸露起伏地表的BRDF模型[J],2016,36(1):0129001-1-0129001-8.
APA	黄珣,白璐,&吴振森.(2016).裸露起伏地表的BRDF模型.光学学报,36(1),0129001-1-0129001-8.
MLA	黄珣,et al."裸露起伏地表的BRDF模型".光学学报 36.1(2016):0129001-1-0129001-8.