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요약정보
基于广义逆矩阵的BRDF模型参数拟合方法 / Parameter fitting method of BRDF model based on generalized inverse matrix
Resource Type
Academic Journal
Authors
赵佳乐
;
周冰
;
王广龙
;
应家驹
;
王强辉
;
邓磊
;
ZHAO Jiale
;
ZHOU Bing
;
WANG Guanglong
;
YING Jiaju
;
WANG Qianghui
;
DENG Lei
Source
激光技术 / Laser Technology
. 47(3):407-412
Subject
光谱学
BRDF模型
广义逆矩阵
参数拟合
Language
Chinese
ISSN
1001-3806
Online Access
Find it @ DONGA
초록
为了提高二向性反射率分布函数(BRDF)模型参数拟合的效率,充分了解地物目标的光谱方向特性,提出了一种基于广义逆矩阵的BRDF模型参数拟合方法.首先分析了地物光谱反射的方向特性,然后使用成像光谱仪测量不同方向条件下目标的光谱反射率,将实验条件与先验测量数据代入BRDF模型中,建立广义逆矩阵等式并拟合出测量目标的模型参数;利用拟合的目标BRDF模型参数反推任意特定方向条件下的光谱反射率,并与实测数据作对比,采用光谱角制图法度量其相似度.结果表明,草地和迷彩雨衣的拟合光谱曲线与实测光谱曲线的相似度很高,分别达到了0.1307和0.0896,证实了该参数拟合方法的有效性,同时也验证了BRDF模型的泛化拟合能力.该方法原理简单、快速有效,可为其它类型的BRDF模型参数拟合与后续地物目标光谱特性研究提供参考.
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