Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
-
Christoph Holst
and
Heiner Kuhlmann
Abstract
When using terrestrial laser scanners for high quality analyses, calibrating the laser scanner is crucial due to unavoidable misconstruction of the instrument leading to systematic errors. Consequently, the development of calibration fields for laser scanner self-calibration is widespread in the literature. However, these calibration fields altogether suffer from the fact that the calibration parameters are estimated by analyzing the parameter differences of a limited number of substitute objects (targets or planes) scanned from different stations. This study investigates the potential of self-calibrating a laser scanner by scanning one single object with one single scan. This concept is new since it uses the deviation of each sampling point to the scanned object for calibration. Its applicability rests upon the integration of model knowledge that is used to parameterize the scanned object. Results show that this calibration approach is feasible leading to improved surface approximations. However, it makes great demands on the functional model of the calibration parameters, the stochastic model of the adjustment, the scanned object and the scanning geometry. Hence, to gain constant and physically interpretable calibration parameters, further improvement especially regarding functional and stochastic model is demanded.
© 2014 by Walter de Gruyter Berlin/Boston
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- Experts View
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Articles in the same Issue
- Masthead
- Editorial
- Editorial to the Special Edition of the JAG on Engineering Geodesy
- Research Articles
- A Tale of Five Bridges; the use of GNSS for Monitoring the Deflections of Bridges
- Optimal GPS/accelerometer integration algorithm for monitoring the vertical structural dynamics
- Wavelet De-noising of GNSS Based Bridge Health Monitoring Data
- Utility Theory as a Method to Minimise the Risk in Deformation Analysis Decisions
- Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
- Influence of surface reflectivity on reflectorless electronic distance measurement and terrestrial laser scanning
- Experts View
- Engineering Geodesy - Definition and Core Competencies
