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Mean Shift Segmentation Assessment for Individual Forest Tree Delineation from Airborne Lidar Data

Lookup NU author(s): Dr Wen Xiao, Aleksandra Zaforemska, Magdalena Smigaj, Dr Rachel Gaulton

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Airborne lidar has been widely used for forest characterization to facilitate forest ecological and management studies. With the availability of increasingly higher point density, individual tree delineation (ITD) from airborne lidar point clouds has become a popular yet challenging topic, due to the complexity and diversity of forests. One important step of ITD is segmentation, for which various methodologies have been studied. Among them, a long proven image segmentation method, mean shift, has been applied directly onto 3D points, and has shown promising results. However, there are variations among those who implemented the algorithm in terms of the kernel shape, adaptiveness and weighting. This paper provides a detailed assessment of the mean shift algorithm for the segmentation of airborne lidar data, and the effect of crown top detection upon the validation of segmentation results. The results from three different datasets revealed that a crown-shaped kernel consistently generates better results (up to 7 percent) than other variants, whereas weighting and adaptiveness do not warrant improvements.


Publication metadata

Author(s): Xiao W, Zaforemska A, Smigaj M, Wang Y, Gaulton R

Publication type: Article

Publication status: Published

Journal: Remote Sensing

Year: 2019

Volume: 11

Online publication date: 28/05/2019

Acceptance date: 24/05/2019

Date deposited: 06/06/2019

ISSN (print): 2072-4292

ISSN (electronic): 2072-4292

Publisher: MDPI

URL: https://doi.org/10.3390/rs11111263

DOI: 10.3390/rs11111263


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