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Bias of cylinder di...
Bias of cylinder diameter estimation from ground-based laser scanners with different beam widths : a simulation study
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- Forsman, Mona (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
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- Börlin, Niclas, 1968- (författare)
- Umeå universitet,Institutionen för datavetenskap
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- Olofsson, Kenneth (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
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- Reese, Heather (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
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- Holmgren, Johan (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Department of Forest Resource Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
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(creator_code:org_t)
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- Amsterdam : Elsevier, 2018
- 2018
- Engelska.
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Ingår i: ISPRS journal of photogrammetry and remote sensing (Print). - Amsterdam : Elsevier. - 0924-2716 .- 1872-8235. ; 135, s. 84-92
- Relaterad länk:
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Fjärranalysteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Remote Sensing (hsv//eng)
Nyckelord
- Mobile laser scanning
- Diameter estimation
- Cylinder measurement
- Simulation
- Terrestrial laser scanning
- Circle fit methods
- Forest measurement
- Tree stem diameter
- data- och systemvetenskap
- computer and systems sciences
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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