Redundant visual surveillance – Use of multiple camera types


In environments which require heavy security, having a system with built-in redundancy can be almost as important as the security apparatus itself.

Building a visual surveillance matrix which can continue to operate under extenuating circumstances is vital in today’s world. More sophisticated techniques to bypass standard security systems are being developed every day, so we must be ready for more unique situations as they arise.

Many who install and operate visual surveillance systems will be familiar with the differing types of cameras available. The two most common types are dome cameras and bullet style cameras. In general, the more bulky bullet style cameras are used in outdoor applications, and domes are found inside buildings. In many heavy security environments a combination of these camera types is optimal.

Redundancy can be achieved in a particular area by using more than one camera type with overlapping fields of view. It can be advantageous to use a longer range bullet style camera with infrared capabilities to oversee perimeter areas. These cameras can also be light and motion activated, which makes them ideal in many situations. Every camera type has certain limitations, however, and concealing a dome camera nearby can provide a safety net if perimeter cameras are disabled.

In recent times, the advances in cameras have resulted in newer dome cameras being capable of long range clarity which rivals some of the contemporary bullet style models’ function. If possible, try to have the dome camera concealed so if the primary bullet camera is disabled, the perpetrator will not be aware they are still being surveilled. Also, using a combination of feed types can help greatly. If the perimeter bullet camera is IR (infrared), it may be disabled by clever use of laser pointers, or arrays of LED lights. Many criminals have caught onto this by now, so a concealed backup with a normal feed can offer continued visuals even when the infrared device is struggling to adjust to light saturation. Take into consideration these items when building a visual surveillance matrix:

– If a perpetrator disables the main camera in this area, will all visual observation be disabled?
– What if a perpetrator is able to disable the main (most obvious) camera at a location?
– Can a backup camera be disabled in the same way?
– Can the combination of differing camera types overlooking a common area provide redundancy – not only from technological attacks, but also physical vandalism?

Those in the security field are aware of how perception can cause differing reactions in criminals. To save money, some have even found the use of ‘dummy’ cameras useful as a deterrent. If the criminal sees an obvious camera which he is familiar with disabling, it is likely he will move on his next objective so long as he is unaware of the concealed secondary unit. It is recommended that the secondary camera be of a dome type as they are much easier to conceal, and much more difficult to vandalize.

It is typical to arrange cameras to overlook common areas for general redundancy, however, creative use of multiple camera types can result in an even more robust observance network.

Author’s Bio: Sidra, a well known writer is known for writing articles on technological security issues. Visit the website IdentityTheft.net for better knowledge.

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