C. Sacchi et Cs. Regazzoni, A distributed surveillance system for detection of abandoned objects in unmanned railway environments, IEEE VEH T, 49(5), 2000, pp. 2013-2026
In this paper, a distributed video-surveillance system for the detection of
dangerous situations related to the presence of abandoned objects in the w
aiting rooms of unattended railway stations is presented. The image sequenc
es, acquired with a monochromatic camera placed in each guarded room, are p
rocessed by a local PC-based image-processing system, devoted to detecting
the presence of abandoned objects. When an abandoned object Is recognized,
an alarm issue is transmitted to a remote control center, located few miles
far from the guarded stations. A multimedia communication system based on
direct sequence code-division multiple-access (DS/CDMA) techniques aims at
ensuring secure and noise-robust wireless transmission links between the gu
arded stations and the remote control center, where the processing results
are displayed to the human operator. Results concern: 1) the performances o
f each local image processing system in terms of False-alarm and misdetecti
on probabilities, and 2) the performances of the CDMA multimedia transmissi
on system in terms of bit error rates (BERs) and quality of service (QoS).