id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_ocseewgofzc77meiush4v2ytqe	Yelu Zeng	Extracting Leaf Area Index by Sunlit Foliage Component from Downward-Looking Digital Photography under Clear-Sky Conditions	2015.0	26	.pdf	application/pdf	11132	846	65	Extracting Leaf Area Index by Sunlit Foliage Component from Downward-Looking Digital Photography under Clear-Sky Conditions Keywords: leaf area index; near-surface remote sensing; digital photography; gap fraction; area ratio of the sunlit foliage component using the GO model, instead of using the directional gap proposed to extract LAI from downward-looking digital images acquired on sunny days (Figure 1): 1. Estimate the area ratio of the sunlit foliage component PT from digital images by an 2. Extract the clumping index Ω from digital images by a path length distribution-based method [37]. the path length-based method improved the accuracy of the clumping index (CI) estimation compared foliage component under sunny conditions with the CI estimated by the path length-based method under sunny conditions with the clumping index estimated by the path length-based method extraction method by the sunlit foliage component improved the accuracy of the LAI estimation from 	./cache/work_ocseewgofzc77meiush4v2ytqe.pdf	./txt/work_ocseewgofzc77meiush4v2ytqe.txt