The correct choice of the cameras - it is a decisive factor, determining the effectiveness of the monitoring system. There are many guides on the right of their choice, but most of them do not indicate the most important criteria for the usefulness of cameras in the surveillance system. The following is offered the most important parameters, affecting the usability of the camera and what to consider when choosing a.
Analog and digital cameras
CCTV cameras can be divided into two types - digital and analog. The differences between them are so extensive, that they deserve a separate article. Usually, digital models, available at triniti-sb.com.ua, almost all respects superior to analog. However, in some cases it is necessary to use the second, eg, in places with little light.
camera heart
The "heart" of every camera is its sensor. In this respect, they are divided according to the type of technology of its production - CCD and CMOS. The differences between them are relatively large and to describe them all here does not make sense. Basically, CMOS-sensors have a slightly better picture performance, but can not effectively operate in low-light conditions due to the excessive influence of the noise signals. In this way, to work at night are recommended cameras with CCD sensor.
chipset
An important characteristic of the camera is its “brain”, or DSP. This unit is responsible for processing the image, obtained from a matrix. intuitively, that the more functions in the DSP, all the better. But this is not the - the camera should perform certain tasks. It means, that part of the functions of the DSP are completely unnecessary. Besides, Not all chip sets perform the same functions with the same precision and speed.
Resolution
The resolution is a very important parameter, and should be matched as closely as possible. The main factor, influencing his choice, a surveillance area. The larger the area, the higher the resolution you need, and the image obtained should allow the identification or detection, depending on the destination device.
Sensitivity
an important factor, determining the possibility of using the camera, is its sensitivity - how well it works in low light or infrared light. Sensitivity is expressed in Lux, and determines the required minimum light intensity to be effective. Usually, the smaller the value, the camera is more sensitive in terms of this parameter it is better. When you purchase the device should pay attention - if the sensitivity is suitable for their conditions and the type of lighting.
Lens
The last parameter, determining the usefulness of the camera - the lens is used. Generally, the right choice of lens is one of the most important for the camera. With this option, linked popular today lens with variable focal length. They allow you to change the coverage area, to adapt the device to the specific needs, which may change over time.
