Verification of a video surveillance system

Please, note that the article is automatically translated from Russian into English, so the translation may not be accurate.

Mironov E.A., Mosolov A.S. Moscow, Russia, "Amulet"

Kirienko A.S., Minsk, Belarus, LLC "Synesis"

The article deals with setup and testing of video surveillance cameras as they are installed on-site security or maintenance. A brief description of the software function module verifikation (module CAD tools SDB Amulet), its objectives, outcomes, that  an expert gets while using the module. Denotes the direction of further development of the module.

This article is devoted to the verification of security cameras as they are installed at the facility or maintenance.

First, let's say a few words in general about the computer-aided design of integrated security "Amulet" (hereinafter - CAD Design Bureau "Amulet"). CAD Design Bureau "Amulet" is a system of software modules include certain tools, using which a user (operator) can design a system of complex engineering and technical protection (henceforth - SITZ) for some object, with its three-dimensional model, as well as to assess effectiveness of the newly constructed his system, or to assess the effectiveness of an already existing SITZ, installed and operated on some object. CAD Design Bureau "Amulet" is a collection of software modules that implement the functional elements that can be used to simulate virtual SITZ object to its 3D model, choosing one or another of its components from a database of technical means.

One of the components, and certainly one of the major, sub-SITZ is a subsystem of video surveillance, or as it is now commonly called, closed-circuit television system (hereinafter - the COT). Video surveillance - is an integral part of almost any modern security system. The main function of SOT - an assessment of the situation in the controlled area. Operator to ETS could quickly, promptly and adequately assess the situation, the subsystem must be designed to effectively and properly installed in accordance with the project SITZ. Should not be blind, uncontrolled zones or, if this is impossible by any cause, no matter what, the number and size of these zones should be minimal. In addition, the ETS should not be too many cameras. No need to scenes that are measured in camcorders, unnecessarily duplicated, because duplication can enter the operator ETS to mislead or confuse. In addition, the more cameras the operator, the harder it is to them controlled, the stronger the need for equipment for processing video streams and more storage space for archived video. And the cost of redundant system will be higher. CAD Design Bureau "Amulet" SITZ allows to design efficient, and verification module, which is included in the toolkit is the subject of this article, just sent out an engineer to help install a security system so that it will perform its functions effectively. The effectiveness of the designed SITZ confirmed by the results of testing and evaluation. How exactly determined efficiency - an issue which, inter alia, was discussed at previous conferences on security [1].

As mentioned above, one of the functional elements of CAD SDB "Amulet" is a module verification of video cameras at the three-dimensional model of the protected object. Verification will be a very useful tool just for evaluating the effectiveness of in accordance with the scenario of an already existing at a certain site and operated CCTV systems, as well as for the maintenance of security systems to verify compliance with the expanded on-site COT project. The essence of the verification tool is that with it we can more accurately set the camera to the object model: it helps us to achieve compliance with the scene, observed a real video camera mounted on the object (Fig. № 1), the stage of virtual camera to a 3D model of the object (Figure . № 2) (in this example, data entry of a cottage industry).

Of great importance is how accurate 3D model reproduces the real object. This is particularly relevant to the linear dimensions and several smaller concerns the degree of detail. In the verification tool shows what the camera sees on the 3D model. Architectural elements of the object presented as a frame (wire) model, with the removal of hidden lines. Upload an image scene with a real camcorder, we are using the CAD tool to manually set the camera on a model so that it passed the scene in exactly the same scene with a real camera. When this is achieved, the frame and image are the same. To install the matching of real and virtual scenes are used as parameters of the optical system of cameras installed, and the toolbar for controlling the spatial orientation of the camera to a 3D model. Fig. № 3 shows the result of verification, which shows that the scenes with the real and virtual cameras are the same.

Fig. №1 A shot with a real camcorder

Fig. №2 Window verification with the model of the object under the camera review

Fig. №3 Verification of the picture made by a real camcorder

Verification is working in real time. This is achieved through the use of display wireframe model, taking into account the distance to the model elements and their visibility, and thanks to the display using graphics technology DirectX. This is particularly important for models containing a large number of architectural elements. To date, the implementation process - verification on the live-video.

After establishing the correspondence between real and virtual surveillance systems, using the other features of CAD, assess the effectiveness of security video surveiilance systems installed. Analyzing the results, both numerically and what we visually see on the model, we can draw conclusions about how well a particular camera position when placing it in some coordinates, and is it worth to have a camera in this place. At the moment, the original premise for using the tool is also the fact that the model we get a clear, sharp images without distortion across the displayed scene.

REFERENCES

1. Mosolov S. Evaluating the effectiveness of video surveillance systems / / Proceedings of X International Scientific-Practical Conference "Information Security. - Taganrog, 2008, Part I », p. 52-55.

2. Mosolov AS, Novikov Yu.V. Generalized criterion for evaluating the effectiveness of the detection subsystem, and SDB score probability of detection of the offender in Proceedings of the VI International Scientific and Practical Conference "Information Security. - Taganrog, 2004, p. 118-120.

3. Belyaeva EA, Kuzoyatov OP, Mosolov, AS, Novikov, V. Method of designing integrated security system object.Patent RF № 2219576 from 05.03.2002.