教你学习一些安防摄像机产品参数（Teach you to learn some security camera product parameters）.doc

教你学习一些安防摄像机产品参数（Teach you to learn some security camera product parameters） Surveillance cameras, the parameters as follows: CCD size, horizontal resolution, minimum illumination value, signal-to-noise ratio, shutter speed and other basic parameters, automatic white balance automatic gain, power supply, installation mode, communication interface and other hardware facilities. If it is an integrated camera, you also need to study the performance of the lens and other indicators. These parameters list enough to the user how to eliminate dazzling, you must first clear selection of product demand, the corresponding demand investigation of key indicators. Definition: This is the index parameters of camera product catalogue will be concerned at first glance. In a sense, the cameras sharpness index determines its grade. Now most of the analog products on the market have more than 500 lines of clarity level, part of the 960H program products have reached the level of 700 lines. Digital cameras usually show the level of resolution they can achieve at pixel level, such as 1 million 300 thousand pixels and 2 million pixels, which can correspond to 700TVL and 1000TVL respectively. But individual businesses will exist vacuity or Overgeneralization. If the analog camera Monogram horizontal resolution 540TVL, a little attention will find behind the center line of small print definition. What does that mean? Limited by the camera with CCD lens, DSP solutions and other factors, some camera can only show the highest resolution in the position near the center of the image, and the edge part cannot reach this definition, the overall average resolution may only 520TVL, or even lower. So you need to pay extra attention when choosing. Minimum illumination index: This is an important parameter of the analog camera, but this parameter is the most mysterious (no one) in the network camera index. The minimum illumination of a camera is also known as the sensitivity of the camera. There are ma