video surveillance articles

The internal structure of the security camera

On the whole, we can divide the interior of the security camera into three major parts: image acquisition, video image processing and coding, and image output.

Related Wi-Fi knowledge in security

Wi-Fi is the abbreviation of wireless fidelity, which literally means “wireless fidelity.” Now we are talking about Wi-Fi generally refers to wireless lan (WLAN), wireless local area network, wireless hotspot or wireless network. If this LAN is connected to the external network through a router, then Wi-Fi can connect to the Internet.

Security camera classification

If the standards are set too trivially and the classification is too fine, many cameras will appear in different classifications at the same time, which is not conducive to the overall Grasp the entire security camera system.

Resolution in security

Resolution in security, reading in conjunction with Related concepts of video coding.

Explosion-proof and anti-corrosion cameras in security

Occasions and environments prone to explosions include oil refineries, pipeline gas transportation, oil and gas exploration, mining, etc. If you use security monitoring equipment in these places and environments, you must use explosion-proof products with explosion-proof shields.

Fisheye lens

A fisheye lens is a lens with a viewing angle close to or equal to 180° (maybe greater than 180°). It is an extreme wide-angle lens, fisheye lens is its common name. In order to maximize the viewing angle of the lens, the front lens of this photographic lens has a short diameter and a parabolic projection to the front of the lens, which is quite similar to the eyes of a fish, so it is called a fisheye lens.

i-CS lens

The i-CS lens lens is completely reversed, and the lens information, such as lens interface type (CS), lens distortion, zoom, focus, and aperture information is provided to the camera. Based on this information, the camera can continuously adjust and optimize the image effect.

Application of 4G LTE cat.1 in the Internet of Things and Security

Now that we have entered the 5G era, it seems a bit out of date to introduce 4G/LTE. However, at the beginning of this year (2020), LTE cat.1 in 4G suddenly became hot, especially since it brought new opportunities to the Internet of Things and security video.

PoE power supply for video security ipcamera

PoE, Power over Ethernet, is to supply power to connected devices through a network cable. Network cable, also called twisted pair cable. Twisted pair, as the name implies, is two wires twisted together. The general network cable is composed of 4 pairs of twisted pairs, that is, 8 wires.