An Integrated Flexible Self-calibration Approach for 2D Laser Scanning Range Finders Applied to the Hokuyo UTM-30LX-EW

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributed

Contributors

Abstract

The paper presents a flexible approach for the geometric calibration of a 2D infrared laser scanning range finder. It does not require spatial object data, thus avoiding the time-consuming determination of reference distances or coordinates with superior accuracy. The core contribution is the development of an integrated bundle adjustment, based on the flexible principle of a self-calibration. This method facilitates the precise definition of the geometry of the scanning device, including the estimation of range-measurement-specific correction parameters. The integrated calibration routine jointly adjusts distance and angular data from the laser scanning range finder as well as image data from a supporting DSLR camera, and automatically estimates optimum observation weights. The validation process carried out using a Hokuyo UTM-30LX-EW confirms the correctness of the proposed functional and stochastic contexts and allows detailed accuracy analyses. The level of accuracy of the observations is computed by variance component estimation. For the Hokuyo scanner, we obtained 0.2 % of the measured distance in range measurement and 0.2 deg for the angle precision. The RMS error of a 3D coordinate after the calibration becomes 5 mm in lateral and 9 mm in depth direction. Particular challenges have arisen due to a very large elliptical laser beam cross-section of the scanning device used.

Details

Original languageEnglish
Title of host publicationInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
PublisherCopernicus Publications
Pages385-393
Number of pages9
Publication statusPublished - 2014
Peer-reviewedNo

Publication series

SeriesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences: Vol. 40,1 - 40,8
Number5
Volume40

External IDs

Scopus 84924255748
ORCID /0000-0001-7662-8572/work/141556284

Keywords

Keywords

  • LIDAR, laser range finder, error model, calibration, bundle adjustment, variance component estimation, terrestrial laser scanning