| Day and Night Security Cameras - The Best of Both Worlds |
 |
 |
 |
| Written by Ernesto Amadon |
| Monday, 08 February 2010 15:02 |
|
A Brief Overview
A Brief Overview When it comes to video camera surveillance requirements, color and black and white CCTV security cameras are feasible security options. However, these two have different specialties. If you want to have color features, use color security cameras which is very effective in getting colors of criminals, vehicles or other possessions done during the crime. By getting the color information, it may hasten the flow of investigation. Color security cameras accurately produce colors because on the time of creating, IR cut filter is positioned on top of the imager. This let the cut filter to see only with the visible levels of spectrum. As a result, color surveillance cameras have less capability in creating functional images in low light setting. Conversely, black and white video camera surveillance setups don't use an IR cut filter because they do not need to see color. With the absence of this filter, B...W CCTV camera options can make use of other light frequencies - such as infrared - which come from a variety of sources, including the sun, fluorescent lights, incandescent lights and of course... infrared illuminators. As a result, B...W surveillance cameras perform significantly better in low light and some can see at light levels as low as 0.0001 lux (almost complete darkness). An additional benefit of B...W video surveillance cameras seeing in the infrared range is the ability to illuminate an area with IR, providing the camera with ample lighting while leaving the area naturally dark which can aide in the capture of suspects. 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. All shapes and sizes of day/night surveillance cameras are offered get the satisfaction you need virtually in every application required. D/N technology is offered in many types such as dome cameras, fixed cameras, and bullet cameras as well as in tiny board cameras .Tiny cameras are very valuable in secret operations which usually happens in any lighting conditions. Lots of day/night CCTV cameras are also offered in built in infrared illumination in which is a good trade. The traditional and most effective D/N security cameras are often referred to as true day/night cameras, and use a removable mechanical cut filter, as described above. However, digital day/night cameras (or electronic day/night cameras) are also available, which electronically adjust colors during the day, instead of using an infrared filter. This allows the digital day/night cameras to deliver similar benefits of true day/night cameras, but at a lower cost. Without the need for a physical filter, digital day/night technology can also be leveraged for smaller form factors, 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 conventional cameras, day/night cameras normally have two lux ratings .The first one is for the camera's color mode, and the other one is for black and white mode. Considering both will let you compare between day/night and more familiar customary 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 - Numerous surveillance cameras in the marketplace with low lux ratings, however it does not automatically mean they will produce a high-quality picture in low light. To make sure you get both, choose a security camera with a signal-to-noise ratio of 48dB or higher. DISCLAIMER: This article is provided as information only and is not to be taken as financial advice. Video camera surveillance can be an competent instrument and is utilized in many industries. Employing video surveillance systems can have many very good effects. |