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Friday, November 6, 2009

The Advantages of Having Day and Night Cameras For Your Video Camera Surveillance Needs

By Dan Musse

A Short Summary

Either black and white or colored CCTV security cameras both have their distinctive advantages for your video camera surveillance requirements. Color security cameras have very evident advantage of giving excellent color feature. It has the capacity to capture the color details of a criminal's skin tone, clothing, or vehicle. This is actually very advantageous in solving the crime and prevent the criminals to break lose. As image is produced, IR cut filter is positioned over the imager In order for color security cameras to accurately create colors. The cut filter permits the camera to only see light in the visible spectrum (400nm to 750nm). As a result, color surveillance cameras fails when it comes to creating important images in not so lighted scenes.

On the contrary, black and white video camera surveillance setups don't have an IR cut filter because they are intended to interpret color. Without the filter, B...W CCTV camera options can utilize other light frequencies like infrared. Infrared which come from a numerous sources, including the sun, fluorescent lights, incandescent lights and especially infrared illuminators. Consequently ,B...W surveillance cameras operates notably better in low light and some can see at light levels 0.0001 lux which is almost complete darkness. Other advantage of B...W video surveillance cameras is the ability to illuminate an area with IR. It provides the camera with sufficient lighting but gives natural darkness which can help in suspects' arrest.

The Advantages of Day/Night Cameras

Day/Night security cameras provide the exceptional advantages of both color and black and white CCTV camera setups. D/N video security cameras operate the same color cameras during daytime and automatically switch in B...W mode during the night with the use of removable IR cut filter. When the darkness comes, day/night cameras sense the lower light levels and automatically take away the IR cut filter, instantly changing to a more responsive black and white mode.

Day/night surveillance cameras are offered in all forms to get the satisfaction needed in every establishment or home.Effective undercover operations gadgets like dome cameras, fixed cameras, bullet cameras and even in tiny board cameras are presented in many D/N technology forms. Those mentioned gadgets are very helpful since secret operations sometimes happen in diverse lighting circumstances. Numerous day/night CCTV cameras also present built in infrared illumination, which makes an excellent turn-key camera package.

D/N security cameras are frequently referred to as the true day/night cameras and and the most effective tool. On the other hand, digital day/night cameras (or electronic day/night cameras) also exist, which electronically regulate colors during the day, as a substitute of with an infrared filter. This gives the digital day/night cameras to send comparable benefits of true day/night cameras, although at a lower cost. Because of the innovation, without the filter, digital day/night technology can be adopted to be used in smaller and more modern gadgets, such as bullet cameras.

Whatever type of day/night camera you pick, It is suggested to take into account of the following points to make sure you get the greatest answer for your security needs:

1. Lux ratings - Unlike traditional cameras, day/night cameras typically have two lux ratings - one for the camera's color mode, and one for its black and white mode. Understanding both will allow you to draw a true comparison between day/night and more familiar traditional CCTV cameras.

2. Lenses - If you are buying a fixed security day/night camera that requires a C- or CS-mount lens, be sure to get a CCTV camera lens that is rated for use with infrared light. IR ready camera lenses allow for the proper passage of IR light, the full use of the camera's day/night capabilities, and of course, lower light performance.

3. S/N Ratio - Choose a security camera with a signal-to-noise ratio of 48dB or higher. Lots of surveillance cameras in the open market with low lux ratings, however this does not assure it will produce a quality picture in low light.

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