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Research article - Peer-reviewed, 2015

A Benchmark of Lidar-Based Single Tree Detection Methods Using Heterogeneous Forest Data from the Alpine Space

Eysn, Lothar; Hollaus, Markus; Lindberg, Eva; Berger, Frédéric; Monnet, Jean-Matthieu; Dalponte, Michele; Kobal, Milan; Pellegrini, Marco; Lingua, Emanuele; Mongus, Domen; Pfeifer, Norbert


In this study, eight airborne laser scanning (ALS)-based single tree detection methods are benchmarked and investigated. The methods were applied to a unique dataset originating from different regions of the Alpine Space covering different study areas, forest types, and structures. This is the first benchmark ever performed for different forests within the Alps. The evaluation of the detection results was carried out in a reproducible way by automatically matching them to precise in situ forest inventory data using a restricted nearest neighbor detection approach. Quantitative statistical parameters such as percentages of correctly matched trees and omission and commission errors are presented. The proposed automated matching procedure presented herein shows an overall accuracy of 97%. Method based analysis, investigations per forest type, and an overall benchmark performance are presented. The best matching rate was obtained for single-layered coniferous forests. Dominated trees were challenging for all methods. The overall performance shows a matching rate of 47%, which is comparable to results of other benchmarks performed in the past. The study provides new insight regarding the potential and limits of tree detection with ALS and underlines some key aspects regarding the choice of method when performing single tree detection for the various forest types encountered in alpine regions.

Published in

2015, volume: 6, number: 5, pages: 1721-1747
Publisher: MDPI AG

Authors' information

Eysn, Lothar
Vienna University of Technology (TU Wien)
Hollaus, Markus
Vienna University of Technology (TU Wien)
Swedish University of Agricultural Sciences, Department of Forest Resource Management
Vienna University of Technology (TU Wien)
Berger, Frédéric
National research institute of science and technology for environment and agriculture (IRSTEA)
Monnet, Jean-Matthieu
National research institute of science and technology for environment and agriculture (IRSTEA)
Dalponte, Michele
IASMA Research and Innovation Centre
Kobal, Milan
University of Ljubljana
Pellegrini, Marco
University of Padova
Lingua, Emanuele
University of Padova
Mongus, Domen
University of Maribor
Pfeifer, Norbert
Vienna University of Technology (TU Wien)

UKÄ Subject classification

Remote Sensing

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