Home About Browse Search
Svenska


Tree stem diameter estimation from mobile laser scanning using line-wise intensity-based clustering

Forsman, Mona and Holmgren, Johan and Olofsson, Kenneth (2016). Tree stem diameter estimation from mobile laser scanning using line-wise intensity-based clustering. Forests. 7:9, 1-22
[Journal article] (Unpublished)

[img]
Preview
PDF - Published Version
Available under License Creative Commons Attribution.

2MB

Abstract

Diameter at breast height has been estimated from mobile laser scanning using a new set of methods. A 2D laser scanner was mounted facing forward, tilted nine degrees downwards, on a car. The trajectory was recorded using inertial navigation and visual SLAM (simultaneous localization and mapping). The laser scanner data, the trajectory and the orientation were used to calculate a 3D point cloud. Clusters representing trees were extracted line-wise to reduce the effects of uncertainty in the positioning system. The intensity of the laser echoes was used to filter out unreliable echoes only grazing a stem. The movement was used to obtain measurements from a larger part of the stem, and multiple lines from different views were used for the circle fit. Two trigonometric methods and two circle fit methods were tested. The best results with bias 2.3% (6 mm) and root mean squared error 14% (37 mm) were acquired with the circle fit on multiple 2D projected clusters. The method was evaluated compared to field data at five test areas with approximately 300 caliper-measured trees within a 10-m working range. The results show that this method is viable for stem measurements from a moving vehicle, for example a forest harvester.

Authors/Creators:Forsman, Mona and Holmgren, Johan and Olofsson, Kenneth
Title:Tree stem diameter estimation from mobile laser scanning using line-wise intensity-based clustering
Series/Journal:Forests (1999-4907)
Year of publishing :2016
Depositing date:17 November 2016
Volume:7
Number:9
Page range:1-22
Number of Pages:22
Publisher:MDPI
ISSN:1999-4907
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K10 Forestry production
U Auxiliary disciplines > U40 Surveying methods
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 207 Environmental Engineering > Remote Sensing
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:forest trees, lasers, remote sensing, harvesters
Keywords:mobile mapping, forest harvester, circle fit, stem diameter, 2D laser scanning, precision forestry, clustering
URN:NBN:urn:nbn:se:slu:epsilon-e-3790
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3790
Additional ID:
Type of IDID
Web of Science (WoS)000385428900024
DOI10.3390/f7090206
ID Code:13849
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Deposited By: SLUpub Connector
Deposited On:17 Nov 2016 14:31
Metadata Last Modified:17 Nov 2016 14:31

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits