The Effect of Datum Constraints for Terrestrial Laser Scanners Self-Calibration (6909) |
| Mohd Azwan Abbas, Halim Setan, Zulkepli Majid (Malaysia), Albert K. Chong (Australia) and Derek D. Lichti (Canada) |
Mr. Mohd Azwan Abbas
Senior Lecturer
Universiti Teknologi MARA
Department of Geomatic Science, Faculty of
Architecture, Planning & Surveying, UiTM Perlis
Arau
02600
Malaysia
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| Corresponding author Mr. Mohd Azwan Abbas (email: mohdazwanabbas[at]yahoo.com, tel.: +6019-4705136) |
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| [ abstract ] [ paper ] [ handouts ] |
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Published on the web 2014-03-21
Received 2013-11-15 / Accepted 2014-02-06 |
| This paper is one of selection of papers published for the FIG Congress 2014 in Kuala Lumpur, Malaysia and has undergone the FIG Peer Review Process. |
FIG Congress 2014
ISBN 978-87-92853-21-9 ISSN 2308-3441
http://www.fig.net/resources/proceedings/fig_proceedings/fig2014/index.htm
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Abstract |
| Similar to other optical and electronic instruments, data obtained from terrestrial laser scanners (TLSs) can be impaired by errors coming from different sources. Thus, a calibration routine is crucial for TLSs to ensure the quality of the data. Self-calibration is a common camera calibration procedure used in photogrammetry measurement which has been adapted for TLSs application. According to photogrammetry approach, there are several conditions needed be fulfilled for the calibration process especially about network configurations and datum constraints. However, network configurations applied to TLSs self-calibration are quite different compared to photogrammetry. Regarding the datum constraints, the theory states that the selection of either inner or minimum constraints can cause different effect on parameter correlations. Due to this argument, this study investigates the possible effect of datum constraints selection in TLSs self-calibration. Three comparisons were carried out between results obtained from inner and minimum datum constraints. Applying graphic and statistical approaches, the differences were analysed and the results indicated that both datum constraints could give similar outcomes and parameter correlations. |
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| Keywords: Laser scanning; Engineering survey; Terrestrial laser scanner; self-calibration; network configuration; datum constraints |
