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Automatic and robust external camera calibration for high accuracy mobile mapping

Werner Goeman (UGent) , Koen Douterloigne (UGent) , Peter Bogaert (UGent) , Rui Pires and Sidharta Gautama (UGent)
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Abstract
A mobile mapping system (MMS) is the answer of the geoinformation community to the exponentially growing demand for various geospatial data with increasingly higher accuracies and captured by multiple sensors. As the mobile mapping technology is pushed to explore its use for various applications on water, rail, or road, the need emerges to have an external sensor calibration procedure which is portable, fast and easy to perform. This way, sensors can be mounted and demounted depending on the application requirements without the need for time consuming calibration procedures. A new methodology is presented to provide a high quality external calibration of cameras which is automatic, robust and fool proof. The MMS uses an Applanix POSLV420, which is a tightly coupled GPS/INS positioning system. The cameras used are Point Grey color video cameras synchronized with the GPS/INS system. The method uses a portable, standard ranging pole which needs to be positioned on a known ground control point. For calibration a well studied absolute orientation problem needs to be solved. Here, a mutual information based image registration technique is studied for automatic alignment of the ranging pole. Finally, a few benchmarking tests are done under various lighting conditions which proves the methodology’s robustness, by showing high absolute stereo measurement accuracies of a few centimeters.
Keywords
Mobile mapping, extrinsic calibration, external calibration, automation, image registration, mutual information

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MLA
Goeman, Werner, et al. “Automatic and Robust External Camera Calibration for High Accuracy Mobile Mapping.” APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV, edited by AG Tescher, vol. 8499, SPIE, 2012.
APA
Goeman, W., Douterloigne, K., Bogaert, P., Pires, R., & Gautama, S. (2012). Automatic and robust external camera calibration for high accuracy mobile mapping. In A. Tescher (Ed.), APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV (Vol. 8499). San Diego, CA, USA: SPIE.
Chicago author-date
Goeman, Werner, Koen Douterloigne, Peter Bogaert, Rui Pires, and Sidharta Gautama. 2012. “Automatic and Robust External Camera Calibration for High Accuracy Mobile Mapping.” In APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV, edited by AG Tescher. Vol. 8499. SPIE.
Chicago author-date (all authors)
Goeman, Werner, Koen Douterloigne, Peter Bogaert, Rui Pires, and Sidharta Gautama. 2012. “Automatic and Robust External Camera Calibration for High Accuracy Mobile Mapping.” In APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV, ed by. AG Tescher. Vol. 8499. SPIE.
Vancouver
1.
Goeman W, Douterloigne K, Bogaert P, Pires R, Gautama S. Automatic and robust external camera calibration for high accuracy mobile mapping. In: Tescher A, editor. APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV. SPIE; 2012.
IEEE
[1]
W. Goeman, K. Douterloigne, P. Bogaert, R. Pires, and S. Gautama, “Automatic and robust external camera calibration for high accuracy mobile mapping,” in APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV, San Diego, CA, USA, 2012, vol. 8499.
@inproceedings{2976595,
  abstract     = {A mobile mapping system (MMS) is the answer of the geoinformation community to the exponentially growing demand for various geospatial data with increasingly higher accuracies and captured by multiple sensors. As the mobile mapping technology is pushed to explore its use for various applications on water, rail, or road, the need emerges to have an external sensor calibration procedure which is portable, fast and easy to perform. This way, sensors can be mounted and demounted depending on the application requirements without the need for time consuming calibration procedures. A new methodology is presented to provide a high quality external calibration of cameras which is automatic, robust and fool proof. The MMS uses an Applanix POSLV420, which is a tightly coupled GPS/INS positioning system. The cameras used are Point Grey color video cameras synchronized with the GPS/INS system. The method uses a portable, standard ranging pole which needs to be positioned on a known ground control point. For calibration a well studied absolute orientation problem needs to be solved. Here, a mutual information based image registration technique is studied for automatic alignment of the ranging pole. Finally, a few benchmarking tests are done under various lighting conditions which proves the methodology’s robustness, by showing high absolute stereo measurement accuracies of a few centimeters.},
  articleno    = {84991A},
  author       = {Goeman, Werner and Douterloigne, Koen and Bogaert, Peter and Pires, Rui and Gautama, Sidharta},
  booktitle    = {APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXV},
  editor       = {Tescher, AG},
  isbn         = {9780819492449},
  issn         = {0277-786X},
  keywords     = {Mobile mapping,extrinsic calibration,external calibration,automation,image registration,mutual information},
  language     = {eng},
  location     = {San Diego, CA, USA},
  pages        = {8},
  publisher    = {SPIE},
  title        = {Automatic and robust external camera calibration for high accuracy mobile mapping},
  url          = {http://dx.doi.org/10.1117/12.928848},
  volume       = {8499},
  year         = {2012},
}

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