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Lookup NU author(s): Dr Wen Xiao
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2020 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives.Street trees are common features and important assets in urban scenes. They are huge in numbers and are constantly changing, thus are difficult to monitor on a regular basis. A method of automatic extraction and dynamic analysis of street trees based on mobile LiDAR data is proposed. First, ground and low objects are filtered from the point clouds. Then, based on a geometric tree model and semantic information, each tree point cloud is extracted, and geometrical parameters such as location, trunk diameter, trunk structure line, tree height, crown width, and crown volume of each tree is obtained. A dynamic analysis combined with the growing characteristics of trees is conducted to compare and analyse the street trees from different epochs, in order to understand whether the trees have grown or been pruned, replanted, or displaced. The proposed algorithm was tested on three epochs of mobile LiDAR data, obtained in 2010, 2016 and 2018, respectively. Experimental results showed that the proposed method was able to accurately detect trees and extract tree parameters for detailed dynamics analysis.
Author(s): Li YQ, Liu HY, Liu YK, Zhao SB, Li PP, Xiao W
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: XXIV ISPRS Congress
Year of Conference: 2020
Online publication date: 12/08/2020
Acceptance date: 02/04/2016
Date deposited: 07/01/2021
Publisher: International Society for Photogrammetry and Remote Sensing
Series Title: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives