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

CORC > 东北地理与农业生态研究所 > 湿地生态系统管理学科组 > 期刊论文

	Quantification winter wheat LAI with HJ-1CCD image features over multiple growing seasons
	X. C. Li, Y. J. Zhang, J. H. Luo, X. L. Jin, Y. Xu and W. Z. Yang
刊名	International Journal of Applied Earth Observation and Geoinformation
	2016
卷号	44 页码:104-112
中文摘要	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,
内容类型	期刊论文
源URL	[http://159.226.123.10/handle/131322/7071]
专题	东北地理与农业生态研究所_湿地生态系统管理学科组_期刊论文
推荐引用方式 GB/T 7714	X. C. Li, Y. J. Zhang, J. H. Luo, X. L. Jin, Y. Xu and W. Z. Yang. 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	X. C. Li, Y. J. Zhang, J. H. Luo, X. L. Jin, Y. Xu and W. Z. Yang.(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	X. C. Li, Y. J. Zhang, J. H. Luo, X. L. Jin, Y. Xu and W. Z. Yang."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.