Posts Tagged ‘camera’

Outdoor Security Cameras In Low Light Conditions

Thursday, October 1st, 2009

When it comes to optimizing the effectiveness of an outdoor security camera the most important thing is capturing useful video images. The first obstacle that most outdoor conditions poise is night surveillance since outdoor environments are little more difficult to control than indoor environments. At night it may be a challenge to provide enough light for the camera’s image sensors to pick up anything. That is when the alternatives must be considered.

Sometimes the best solutions are the simplest. Our first option is to install additional lighting to the area that is to be monitored by an outdoor security camera. There are multiple ways to control the lighting such as lighting sensors to turn the lights on when it gets too dark, or motion activated sensors that could turn the lights as well as start the recording on the camera. If the area is to be lit, make sure the light source is protected just as well as the security camera so vandals don’t get to it.

If the area is not completely dark and the light levels are just too low, try a black and white camera. Colored cameras have higher light requirements than black and white cameras and for that reason a black and white camera can capture images at much lower light levels than a colored camera. This is only effective if there is still some light in the area to be under surveillance. Otherwise a night vision camera will be required.

Night vision security cameras come in varying degrees of effectiveness measured by the LUX rating of the camera. The LUX rating lets us know the minimum light levels required for the security camera to work. The infrared technology records light at a frequency beyond what is visible to our eyes and produces the image in shades of green. The LUX rating is only useful when comparing between similar manufacturers because it is relative to their standards. By itself it doesn’t tell us much except that a LUX rating of 0 means the camera can produce an image in complete darkness.

Although most people are inherently good by nature, there are always discrepancies to that rule and that is why we need things like an outdoor security camera, or two or three, to protect ourselves and validate our accusations against any offenders. Sometimes just lighting an area will be enough to deter criminals, other times they will stop at nothing and the security camera is important for proper recourse.

The most effective way to protect your camera is by installing it properly in the first place. Install the camera inside a housing unit if necessary and it usually will be necessary, and mount the camera flush to the wall or ceiling if possible. Minimize the exposure of the cables to avoid tampering. Take as many threats into consideration when installing the camera to minimize the chances of an attack, and minimize the effect of the attack when it does happen.

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Mitigate Vandalism to Your Outdoor Security Camera

Sunday, June 28th, 2009

The purpose of an outdoor security camera is to monitor an area that is prone to criminal activity or otherwise undesired activity. For this reason the camera itself is put at risk of physical destruction from the very vandals we are protecting ourselves from. There are, however, a few things we can control to minimize the risks.

We must take into consideration the design of the camera or the housing the camera will be encased in. Then how the camera is mounted, where it is mounted, and the very placement of the camera are factors that will determine the amount of risk the camera is in. We can also use intelligent video alarms to deter vandals.

When it comes to the physical toughness of the camera or housing, something made of metal can offer much stronger protection than something made of plastic. Also, a traditional fixed camera that sticks out of a wall or ceiling is more prone to physical destruction than a dome PTZ camera or a dome shaped housing. Also, how it is hidden amongst its environment has a lot to do with whether it is a target for vandalism.

How the camera is mounted also will determine the level of protection from physical abuse. Mounting the camera or housing flush with a wall or ceiling is much more effective than simply mounting it on the wall or ceiling. If most of the camera is mounted inside with only the transparent part showing, it is much better protected from different angles. We also want the cables to be pulled directly through the wall or ceiling but if that can’t be then at least run the cables through a metal conduit tube to protect the cables.

Camera placement is also an important factor in deterring vandalism. By placing a camera out of reach on high walls or in the ceiling, many spur-of-the-moment attacks can be prevented. The downside may be the angle of view, which to some extent can be compensated by selecting a different lens.

Active tampering alarms can detect if a camera is being tampered with and alert the control center or operators. Especially for large systems with many cameras, it is useful as a way of monitoring each camera and making sure they are all working properly. When there is no person to monitor the surveillance live, it is a useful way to notify operators if there is any tampering to the camera.

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