Automatic tie elements detection for laser scanner strip adjustment

Norbert Pfeifer, S.J. Oude Elberink, Sagi Filin

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

33 Citations (Scopus)

Abstract

Measurements with airborne laser scanners are performed in strips, usually with multiple length strips and a few cross strips. Due to i) wrong or inaccurate calibration of the entire measurement system and due to ii) the limited accuracy of the exterior orientation determination with GPS and IMU and systematic errors of these devices, adjacent strips can show discrepancies in their overlap. For removing these discrepancies strip adjustment algorithms require quantification on these offsets at various locations within the overlapping zones. We present a general method for determining these discrepancies automatically based on segmentation of the overlap. A method to determine the accuracy of these discrepancy observations is demonstrated as well. In the examples we reconstruct mean offsets between neighbouring strips of a few centimetres, which, also show substantial variation along the strip axis. The accuracy of this discrepancy observations is in the order of 2cm. The method developed for discrepancy determination can be applied to height or full 3D strip adjustment. It can be used for approaches using the original measurements, the coordinates of the measured points, or only the offsets between surfaces.

Original languageEnglish
Title of host publicationISPRS WG III/3, III/4, V/3 Workshop "Laser scanning 2005"
Place of PublicationEnschede
PublisherInternational Society for Photogrammetry and Remote Sensing (ISPRS)
Pages174-179
Number of pages6
Volume36
Publication statusPublished - Sep 2005
Event2005 ISPRS Workshop Laser Scanning 2005: ISPRS Archives – Volume XXXVI-3/W19, 2005 WG III/3-4 V/3 Proceedings of the ISPRS Workshop Laser scanning 2005 September 12-14, 2005 Enschede, the Netherlands - Enschede, Netherlands
Duration: 12 Sep 200514 Sep 2005
https://www.isprs.org/proceedings/XXXVI/3-W19/

Publication series

NameInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
PublisherCopernicus
ISSN (Print)1682-1750

Conference

Conference2005 ISPRS Workshop Laser Scanning 2005
CountryNetherlands
CityEnschede
Period12/09/0514/09/05
Otherr
Internet address

Keywords

  • Airborne laser scanning
  • Segmentation
  • Strip adjustment

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