By it very nature the environment of a large area is susceptible to all types of weather and environmental interference. If the false alarm rate is too high, it could become a nuisance and this is why the solution requires, in particular, a robust moving object detection feature. 

A system for a large area surveillance project may consist of tens or hundreds of cameras installed around and at the perimeter of the large area. With such an amount of devices, the adjustment of the image quality per camera may vary and could be very complex - this could result in high installation and maintenance costs for a system. It is essential therefore, that such a project should be simple and easy to install.

In a large field, to save on installation costs, each camera should be required to cover as wide a space as possible. This could mean that the objects within the monitored image area appear small. Accordingly, when an intrusion occurs and is detected, the configured PTZ dome camera must move right away to focus on the object in the monitored area to get a clear image on the face or to verify a license plate number relative to the detected event.

TDV's Ibox800 is able to divide an area into 10 zones for each camera (perimeter) view, the coordinates of which are preset for the dome cameras. One Ibox800 can be connected to 8 cameras; this means 80 zones can be programmed relative to the configured PTZ dome cameras. When a camera detects a moving object in a zone, the camera immediately commands the PTZ dome camera to focus its lens on the corresponding coordinates. This is the first step of the zoom. At this time, the image of the PTZ dome camera will be analysed further and its lens will zoom in to the person's head. It is difficult to automatically track close-ups like this, but as long as Auto-focus is fast, a clear photo of the head can be taken.

TDV's Ibox800 has an optical fibre port that can be connected directly to the optical network for long-distance transmission or connected to a Wifi for wireless transmission.