Comparison of target-and mutual informaton based calibration of terrestrial laser scanner and digital camera for deformation monitoring

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Omidalizarandi, M.; Neumann, I.: Comparison of target-and mutual informaton based calibration of terrestrial laser scanner and digital camera for deformation monitoring. In: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives 40 (2015), Nr. 1W5, S. 559-564. DOI: https://doi.org/10.5194/isprsarchives-XL-1-W5-559-2015

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/873

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Sum total of downloads: 499




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Abstract: 
In the current state-of-the-art, geodetic deformation analysis of natural and artificial objects (e.g. dams, bridges,.) is an ongoing research in both static and kinematic mode and has received considerable interest by researchers and geodetic engineers. In this work, due to increasing the accuracy of geodetic deformation analysis, a terrestrial laser scanner (TLS; here the Zoller+Fröhlich IMAGER 5006) and a high resolution digital camera (Nikon D750) are integrated to complementarily benefit from each other. In order to optimally combine the acquired data of the hybrid sensor system, a highly accurate estimation of the extrinsic calibration parameters between TLS and digital camera is a vital preliminary step. Thus, the calibration of the aforementioned hybrid sensor system can be separated into three single calibrations: calibration of the camera, calibration of the TLS and extrinsic calibration between TLS and digital camera. In this research, we focus on highly accurate estimating extrinsic parameters between fused sensors and target- and targetless (mutual information) based methods are applied. In target-based calibration, different types of observations (image coordinates, TLS measurements and laser tracker measurements for validation) are utilized and variance component estimation is applied to optimally assign adequate weights to the observations. Space resection bundle adjustment based on the collinearity equations is solved using Gauss-Markov and Gauss-Helmert model. Statistical tests are performed to discard outliers and large residuals in the adjustment procedure. At the end, the two aforementioned approaches are compared and advantages and disadvantages of them are investigated and numerical results are presented and discussed.
License of this version: CC BY 3.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2015
Appears in Collections:Fakultät für Bauingenieurwesen und Geodäsie

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pos. country downloads
total perc.
1 image of flag of Germany Germany 303 60.72%
2 image of flag of United States United States 35 7.01%
3 image of flag of China China 32 6.41%
4 image of flag of Korea, Republic of Korea, Republic of 11 2.20%
5 image of flag of Switzerland Switzerland 8 1.60%
6 image of flag of Japan Japan 7 1.40%
7 image of flag of Indonesia Indonesia 7 1.40%
8 image of flag of Australia Australia 7 1.40%
9 image of flag of India India 6 1.20%
10 image of flag of United Kingdom United Kingdom 6 1.20%
    other countries 77 15.43%

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