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Bias of cylinder diameter estimation from ground-based laser scanners with different beam widths: a simulation study
Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden.
Umeå University, Faculty of Science and Technology, Department of Computing Science.ORCID iD: 0000-0002-7657-6917
Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden.
Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden.
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2018 (English)In: ISPRS journal of photogrammetry and remote sensing (Print), ISSN 0924-2716, E-ISSN 1872-8235, Vol. 135, p. 84-92Article in journal (Refereed) Published
Abstract [en]

In this study we have investigated why diameters of tree stems, which are approximately cylindrical, are often overestimated by mobile laser scanning. This paper analyzes the physical processes when using ground-based laser scanning that may contribute to a bias when estimating cylinder diameters using circle-fit methods. A laser scanner simulator was implemented and used to evaluate various properties, such as distance, cylinder diameter, and beam width of a laser scanner-cylinder system to find critical conditions. The simulation results suggest that a positive bias of the diameter estimation is expected. Furthermore, the bias follows a quadratic function of one parameter - the relative footprint, i.e., the fraction of the cylinder width illuminated by the laser beam. The quadratic signature opens up a possibility to construct a compensation model for the bias.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2018. Vol. 135, p. 84-92
Keywords [en]
Mobile laser scanning, Diameter estimation, Cylinder measurement, Simulation, Terrestrial laser scanning, Circle fit methods, Forest measurement, Tree stem diameter
National Category
Computational Mathematics Forest Science
Research subject
Computer and Information Science
Identifiers
URN: urn:nbn:se:umu:diva-142207DOI: 10.1016/j.isprsjprs.2017.11.013ISI: 000423895100007OAI: oai:DiVA.org:umu-142207DiVA, id: diva2:1160255
Available from: 2017-11-25 Created: 2017-11-25 Last updated: 2018-06-09Bibliographically approved

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The full text will be freely available from 2019-11-24 00:00
Available from 2019-11-24 00:00

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Börlin, Niclas

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  • apa
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