Cameras are substantial elements to provide security to passengers in public spaces, e.g. in urban subway environments. Automated image processing algorithms are used more and more often to analyze the cameras’ video streams. However, misaligned cameras may produce serious problems by either generating false alarms or even being blind due to a shifted field of view. This paper presents two simple, real-time, and straight-forward software methods to detect camera movement and also allow for an adjustable tolerance, i.e. small changes are acceptable. The first approach shifts a reference edge (from a master image) along a convenient path; the second method uses distance measuring to detect a critical camera movement. Both methods are tested on real-world video from a subway environment. Since the algorithms are proposed for application in a railway environment with typically high requirements on operational robustness and reliability, special emphasis is put on constraints and limitations of the presented algorithms.
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2018 Joint Rail Conference
April 18–20, 2018
Pittsburgh, Pennsylvania, USA
Conference Sponsors:
- Rail Transportation Division
ISBN:
978-0-7918-5097-8
PROCEEDINGS PAPER
Reliable Detection of Security Camera Misalignment in Urban Rail Environments
Johannes Hoentsch,
Johannes Hoentsch
TU Dresden, Dresden, Germany
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Sven Scholz
Sven Scholz
TU Dresden, Dresden, Germany
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Johannes Hoentsch
TU Dresden, Dresden, Germany
Sven Scholz
TU Dresden, Dresden, Germany
Paper No:
JRC2018-6178, V001T06A007; 9 pages
Published Online:
June 14, 2018
Citation
Hoentsch, J, & Scholz, S. "Reliable Detection of Security Camera Misalignment in Urban Rail Environments." Proceedings of the 2018 Joint Rail Conference. 2018 Joint Rail Conference. Pittsburgh, Pennsylvania, USA. April 18–20, 2018. V001T06A007. ASME. https://doi.org/10.1115/JRC2018-6178
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