角度采样间隔对获取草地BRDF特性的影响  

Influence of angular sampling interval on capture of the BRDF of grass

作　　者：黄俊梅[1] 乔延利[1] 易维宁[1] 杨世植[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所遥感研究室,安徽合肥230031

出　　处：《量子电子学报》2005年第4期653-656,共4页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金资助项目(60274055)

摘　　要：在可见光波段上,采取三种角度采样间隔,对草地及类草地的人工目标主平面的BRDF特性进行了野外测量实验。实验结果显示:当太阳天顶角较大时,采用的角度采样间隔可以准确地获取草地类目标主平面的DRDF;而当太阳天顶角较小时,必须在“热点”方向附近减小角度采样间隔。实验结果对多角度遥感中角度采样间隔的选择以及减少野外BRDF测量的工作量具有现实的指导意义。In visible spectral band, we measured the BHDF of grass and man-made object similar to grass with three angular sampling intervals in principal plane. Based on the experimental data, we can draw the conclusion： when the sun zenith angle is large （〉 45°）, a interval of 20° is adequate to capture the BRDF of grass in principal plane; when the sun zenith angle is small, a less angular sampling interval in zenith angle is needed in the hot spot area. The above conclusion was not only useful to the selection of angular sampling interval in satellite multi-angle remote sensing but also to reduce experimental work.

关 键 词：遥感 角度采样间隔 野外实验 BRDF 热点 

分 类 号：TP721.1[自动化与计算机技术—检测技术与自动化装置]