文献类型：期刊文献

英文题名：Isolating individual trees in a closed coniferous forest using small footprint lidar data

作者：Zhao, Dan[1,2] Pang, Yong[2] Li, Zengyuan[2] Liu, Lijuan[3,4]

第一作者：Zhao, Dan

通信作者：Pang, Y[1]

机构：[1]Chinese Acad Sci, Inst Remote Sensing & Digital Earth RADI, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China;[2]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[3]Zhejiang A&F Univ, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Linan 311300, Peoples R China;[4]Zhejiang A&F Univ, Sch Environm & Resource Sci, Linan 311300, Peoples R China

年份：2014

卷号：35

期号：20

起止页码：7199-7218

外文期刊名：INTERNATIONAL JOURNAL OF REMOTE SENSING

收录：;EI(收录号：20144500165627);Scopus(收录号：2-s2.0-84908409975);WOS:【SCI-EXPANDED(收录号:WOS:000343808500006)】；

基金：This work was supported by the National State Key Basic Research Project (No. 2013CB733404), the National High Technology Research and Development Programme of China (No. 2012AA12A306), National Natural Science Foundation of China (No. 41401508), and Director Foundation of Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences (No. Y3SJ7900CX).

语种：英文

外文关键词：Optical radar - Watersheds

摘要：Numerous individual tree parameters can be isolated from a canopy height model derived from light detection and ranging. However, closed canopy forests make isolating individual trees difficult. A watershed method based on morphological crown control is studied in this research to isolate individual trees in a closed canopy forest and find how much the tree density influences the individual tree parameters. Morphological crown control is introduced to ensure that the watershed results locate in the crown area. The local maxima algorithm is used to identify potential tree positions in the crown area. Double watershed transformations, in which a simple reconstruction operation is inserted into the two transformations, are then applied to delineate the tree crowns. Finally, the individual trees are isolated, and their parameters are extracted. An experiment is conducted in a closed coniferous forest dominated by Picea crassifolia Kom. in northwest China. Results show that the proposed method can isolate the most dominant and subdominant trees, more than half of the intermediate trees and some suppressed trees.