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In-operation calibration of clock-bias and intrinsic parameters for pan-tilt-zoom cameras based on keypoint tracking

Larsen, Martin Vonheim; Haavardsholm, Trym Vegard; Mathiassen, Kim
Journal article; PublishedVersion; Peer reviewed
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1844825.pdf (1.209Mb)
Year
2020
Permanent link
http://urn.nb.no/URN:NBN:no-84441

CRIStin
1844825

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  • Institutt for informatikk [3641]
  • Institutt for teknologisystemer [76]
  • CRIStin høstingsarkiv [16854]
Original version
Proceedings of SPIE, the International Society for Optical Engineering. 2020, 11538:115380D, 1-17, DOI: https://doi.org/10.1117/12.2573611
Abstract
We propose a method for jointly estimating intrinsic calibration and internal clock synchronisation for a pantilt- zoom (PTZ) camera using only data that can be acquired in the field during normal operation. Results show that this method is a promising starting point towards using software to replace costly timing hardware in such cameras. Through experiments we provide calibration and clock synchronisation for an off-the-shelf low-cost PTZ camera, and observe a greatly improved directional accuracy, even during mild manoeuvres.
 
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