Updated: 04/30/2020 by Computer Hope

A security camera is a hardware device that takes pictures or records video, either indoors or outdoors, for purposes of watching for intruders or thieves. Security cameras are used in businesses, retail stores, schools, homes, parking lots, roads, and almost any other place where people are found. These cameras can help catch criminals in the act and help deter crime by scaring would-be criminals away.

Some security cameras record video 24 hours a day, especially in busy places where there is a lot of people traffic. Other security cameras are designed to record video or take pictures only when motion is detected. Motion-sensing security cameras are more common in homes or small businesses, where there’s less foot traffic, and to reduce the amount of storage needed to save and transmit.

There are many companies that manufacture and sell security cameras. Some of the more popular companies include ADT, Arlo, Nest, Lorex, Ring, and Swann.

How many security cameras to use

Number of security cameras to use - house versus street

The number of security cameras to use is mostly based on the size of the area needing to be monitored. It can also depend on the type and quality of security camera chosen for use. Cheaper security cameras usually have a shorter field of view and are designed for small areas. More expensive security cameras may have a larger field of view, as well as improved video and picture quality.

In smaller, tighter locations, like a home, small business, or alley between buildings or houses, a single security camera is often used. One camera can view and monitor most, or all, of the area, especially if the camera can pan left and right for increased range of view.

In larger, more open locations, like large businesses, schools, or roads, multiple security cameras are often used to view and monitor the area.

How to connect a security camera

HDMI and Wi-Fi connections

Security cameras connect to a storage system, like a computer or server, either by a wired connection or a wireless connection. If wired, security cameras usually connect using HDMI, network, or USB cables. If the connection distance is greater than 50 feet, network cables are the best option to reduce the loss of video quality.

If wireless, security cameras usually connect to a storage system using Wi-Fi. Multiple cameras can connect to a single storage system through Wi-Fi, making it easier to install security cameras where they are needed the most, without the hassle of multiple, long cables.

Depending on the security camera, software may need to be installed for it to be recognized and controlled. Cameras for the home market, like video doorbells, can also be accessed through a smartphone application, linked to other smart home devices on the network.

How to store pictures and video from a security camera

Hard drive

The pictures taken and video recorded by a security camera is usually stored on a storage device. Older security cameras utilized a VCR to record video onto VHS tapes. Today, security cameras utilize hard drives on a computer or server to store pictures and videos. Hard drives allow for a greatly increased amount of storage space, especially for video, which takes up a lot of storage space.

Camera terms, Field of view, Server, Wireless


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By VenomJi

2 thought on “What is Security Camera?”
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