Quantification winter wheat LAI with HJ-1CCD image features over multiple growing seasons

	Quantification winter wheat LAI with HJ-1CCD image features over multiple growing seasons
	Li, Xinchuan 1; Zhang, Youjing 1; Luo, Juhua 1; Jin, Xiuliang 1; Xu, Ying 1; Yang, Wenzhi 1
刊名	INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
	2016
卷号	44 页码:104-112
关键词	NATURE-RESERVES BIODIVERSITY CONSERVATION ECOSYSTEM SERVICES BIOSPHERE RESERVE PROGRESS
通讯作者	Zhang, YJ (reprint author), Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.
英文摘要	Remote sensing images are widely used to map leaf area index (LAI) continuously over landscape. The objective of this study is to explore the ideal image features from Chinese HJ-1 A/B CCD images for estimating winter wheat LAI in Beijing. Image features were extracted from such images over four seasons of winter wheat growth, including five vegetation indices (VIs), principal components (PC), tasseled cap transformations (TCT) and texture parameters. The LAI was significantly correlated with the near-infrared reflectance band, five VIs [normalized difference vegetation index, enhanced vegetation index (EVI), modified nonlinear vegetation index (MNLI), optimization of soil-adjusted vegetation index, and ratio vegetation index], the first principal component (PC1) and the second TCT component (TCT2). However, these image features cannot significantly improve the estimation accuracy of winter wheat LAI in conjunction with eight texture measures. To determine the few ideal features with the best estimation accuracy, partial least squares regression (PLSR) and variable importance in projection (VIP) were applied to predict LAI values. Four remote sensing features (TCT2, PC1, MNLI and EVI) were chosen based on VIP values. The result of leave-one-out cross-validation demonstrated that the PLSR model based on these four features produced better result than the ten features' model, throughout the whole growing season. The results of this study suggest that selecting a few ideal image features is sufficient for LAI estimation. (C) 2015 Elsevier B.V. All rights reserved,
学科主题	Remote Sensing
类目[WOS]	Remote Sensing
收录类别	SCI
语种	英语
WOS记录号	WOS:000364891100011
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39424]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun 130102, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Li, Xinchuan,Zhang, Youjing,Luo, Juhua,et al. Quantification winter wheat LAI with HJ-1CCD image features over multiple growing seasons[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2016,44:104-112.
APA	Li, Xinchuan,Zhang, Youjing,Luo, Juhua,Jin, Xiuliang,Xu, Ying,&Yang, Wenzhi.(2016).Quantification winter wheat LAI with HJ-1CCD image features over multiple growing seasons.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,44,104-112.
MLA	Li, Xinchuan,et al."Quantification winter wheat LAI with HJ-1CCD image features over multiple growing seasons".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 44(2016):104-112.