Intelligent video analysis

April 2013 Perimeter Security, Alarms & Intruder Detection

These days, video sensor technology, ie, the permanent analysis of the video data stream, far exceeds motion detection, which has become an integrated feature in numerous products.

Through image analysis algorithms and self-learning detection systems the DVS 1600 can recognise different situations even in complex scenes. It is thus possible to not just analyse object sizes and speeds but also object types and their specific behaviours.

Using special filters, disruptive environmental influences such as rain, snow or branches moving with the wind are filtered out. Additionally, Dallmeier offers object classification, a self-learning image analysis tool based on neuronal networks. The tool allows the selection of certain object types (eg, persons or cars) for which an alarm should be triggered.

All solutions of the DVS product line are equipped with SEDOR technology. SEDOR is – as the name 'self-learning event detector' implies – a self-learning system. Therefore, the user does not have to make any elaborate settings. Dallmeier also offers a number of high-quality analysis applications which can be used in alarm systems. In research systems they also enable an effective search for certain events.

Specialised intruder detection

With the DVS 1600 Dallmeier offers an excellent solution for protecting certain areas against unauthorised access. The DVS 1600 is based on SEDOR technology. The long years of experience with the multiple award-winning DVS 600 III system were used and integrated into the new product, based on advanced, high-performance picture processing algorithms.

Using the DVS 1600 you can effectively monitor outdoor as well as indoor facilities. The system recognises, for example, if an object approaches an area, and the direction it is coming from or how long it stays in a certain area. Based on the carried out classification the system can differentiate between an object 'human' and an object 'car'.

Particularly with outdoor applications, experience shows that it is insufficient to only evaluate the usual standard criteria (changes in brightness, direction, size, speed). Here, SEDOR is considerably above the norm. The object classification and the analysis of object behaviour provide important information to enable appropriate decisions by the system. Through comprehensive examinations of plausibility, false alarms are reduced to an absolute minimum without ignoring a real alarm message.

Whether the alarm is transmitted to the security control room via network or is carried out via a relay contact, the information is always immediately forwarded to the addressee. The security personnel are supplied with all relevant information at the operator stations to be able to quickly and assuredly make the necessary decisions. Since live pictures are often insufficient for assessing a situation, only the evaluation of the recorded alarm sequence – with pictures from before and after the alarm – can give an explanation about an event. In order to make management easier for the security personnel, the display is carried out automatically, individually and event-related.

Especially outdoors, lighting conditions often change. This affects both the functioning of the camera unit and the image processing algorithms. In order to still achieve optimal analysis results the system automatically adjusts its parameters (auto adaption). During the commissioning, the installer thus has to carry out only a few adjustments of the event rules so that they match the customer’s requirements. Using the graphical user interface the installer can carry out that work quickly and accurately.

For more information contact Dallmeier Southern Africa Office, +27 (0)11 979 4540, [email protected], www.dallmeier.com





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