【摘要】 将均匀度指数引入林木空间分布格局对双向反射分布函数(BRDF)影响的分析中,利用光学遥感模型定量分析林木空间分布格局对BRDF的影响。结果表明:对于红光波段,在大于树冠尺度上均匀度可以有效地描述林木空间分布格局对BRDF曲线的影响;均匀度与BRDF之间呈现负指数关系,同时这种关系还在一定程度上受郁闭度的影响,郁闭度越大,林木空间分布格局对BRDF的影响也越大。对于近红外波段,由于受多次散射的影响,BRDF与林木空间格局之间的关系更为复杂,均匀度尚未有效描述此关系。更多还原

【Abstract】 This study introduces an evenness index for analyzing spatial patterns of trees and investigates the effect of spatial patterns of trees on the BRDF (bidirectional reflectance distribution function) based on a multi-angle remote sensing model.The results show that in the red band,the evenness index can effectively describe the relationship between spatial patterns of trees and BRDF,which shows a negative exponential relationship;this relationship was positively affected by crown cover.In the near infrared band,the relationship between BRDF and tree patterns was more complex because of the effects of multiple scatter,so the evenness index could not describe the relationship effectively in this region.更多还原