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Estimation of forest canopy nitrogen content based on remote sensing

文献类型：期刊论文

作者Yang Xi-Guang1,3; Yu Ying2; Huang Hai-Jun1; Fan Wen-Yi2
刊名JOURNAL OF INFRARED AND MILLIMETER WAVES
出版日期2012-12-01
卷号31期号:6页码:536-543
关键词hyperspectral remote sensing nitrogen content 4-Scale model
ISSN号1001-9014
通讯作者Huang, HJ (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
英文摘要Hypespectral data was used to estimate leaf and canopy nitrogen content. Erf-BP, an improved model based on the Gaussian error function of BP neural network, was used to develop remote sensing models for estimating leaf nitrogen content. Then the scaling conversion function during downscales from canopy to leaf spectral was derived according to principles of geometric optics model. These relations were used during downscales from the canopy reflectance of Hyperion image to leaf spectral for leaf nitrogen content estimation. Finally, forest structural parameter leaf area index (LAI) was used to obtain canopy nitrogen content from leaf level. The results showed that the best Erf-BP. neural network model with testing accuracy of 76.8597% includes 8 neurons in hidden layer. Using scaling conversion function to estimate canopy spectra at 670nm and 865nm, correlations (R-2) between modeling spectra and measurements were 0.5203 and 0.4117 respectively. Correlation coefficient between estimated leaf nitrogen content and measurements was 0.7019. This method provides a good reference for more rapid and accurate estimation of leaf and canopy nitrogen.
学科主题Optics
收录类别SCI
原文出处10.3724/SP.J.1010.2012.00536
语种英语
WOS记录号WOS:000313473900011
公开日期2013-09-24
源URL[http://ir.qdio.ac.cn/handle/337002/12499]  
专题海洋研究所_海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.NE Forestry Univ, Harbin 150040, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yang Xi-Guang,Yu Ying,Huang Hai-Jun,et al. Estimation of forest canopy nitrogen content based on remote sensing[J]. JOURNAL OF INFRARED AND MILLIMETER WAVES,2012,31(6):536-543.
APA Yang Xi-Guang,Yu Ying,Huang Hai-Jun,&Fan Wen-Yi.(2012).Estimation of forest canopy nitrogen content based on remote sensing.JOURNAL OF INFRARED AND MILLIMETER WAVES,31(6),536-543.
MLA Yang Xi-Guang,et al."Estimation of forest canopy nitrogen content based on remote sensing".JOURNAL OF INFRARED AND MILLIMETER WAVES 31.6(2012):536-543.

入库方式： OAI收割

来源：海洋研究所

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