The purpose of video surveillance is not to constantly monitor the image, but the detection and recording of unusual events taking place around the building, in front of the main entrance, in front of the garage, on the terrace. Based on the recorded images, a reconstruction of the events can later be performed. The camera is not used only to record images, but also as a motion detector. Even if nothing is happening, image is being transferred, but it is only recorded upon activation by pre-set events.

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Dahua kamera

DAHUA kamera

For protection of buildings, and especially the areas outside the buildings, surveillance video cameras are highly recommended. Of course it is useful to have a complete system, however even a good camera housing (even though empty) with a red LED which flashes from time to time has a psychological effect. Obvious visible signs of an alarm system presence will avert many attempted burglaries or thefts.

Modern video surveillance systems are computational devices with advanced features and digital data (image) processing that include many possibilities of automation of monitoring and recording of events in supervised areas. All these useful possibilities are achieved by dividing the image into a number of sensor fields, marked out on the image of individual cameras and assigned an operation mode. Depending on the purpose, they may trigger a specific view (zooming on the location of an unusual event), a silent alarm, activation of the alarm monitor, recording of events, communication of an event through various electronic channels, starting or stopping of a certain process etc.

In the process of protecting people and property, sensitive and often private information is being collected. Access to this information by unauthorized persons must be prevented. Among all technical security systems, video surveillance systems are the most sensitive to the risk of information being collected by unauthorised persons. Due to possible misuses and for the purpose of the regulation of this field, technical security systems (as all other security systems) are subject to legislative provisions. The Private Security Act needs to be mentioned here – it regulates who, how and under what conditions can plan and implement technical security systems, including video surveillance systems, and the Personal Data Protection Act, which regulates how to handle video recordings, i.e. where and for how long they can be stored, who and under what conditions has access to them, etc. Of course legal regulations are only a necessary condition and they aren’t sufficient on their own; therefore it has to be ensured that security systems are planned, implemented and maintained by experienced experts, and that protection of sensitive information is entrusted to reliable persons with required expertise.

Video surveillance system as analytical tool

Video surveillance can help us perform many preventive and detection actions.

The most common and most useful functions of advanced analytics are the following:

  • counting (entries, exits, products, occupancy etc.);
  • detection-identification of persons and objects/things (access, limitations, control of size, height, width);
  • determination of speed and direction of movement (speed and direction limitation – wrong-way driving);
  • detection and tracking of movement (due to its high reliability this is the most commonly used function within the security sector, as it allows the identification of movement in the pre-set sensor fields);
  • detection of presence and absence (unknown objects in prohibited areas, obstacles, absence of valuable objects);
  • number plate recording (restrictions on access and crossing control);
  • remote access (events can be monitored from anywhere, via mobile network, both on landlines as well as mobile devices);
  • authentication identification and protection against counterfeiting (watermark).

IP-protocol is prevailing

IP-protocol, like everywhere else, has found its way also into the field of security, mostly (or exclusively) in relation to information transfer. Its presence is very strong on the visual front, where IP-cameras are at the forefront with all their benefits and capabilities (high-resolution cameras with up to 11 MP, flexibility, optimization, numerous built-in smart algorithms).

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