A choosing CCTV camera is a reliable modern means of protecting your home from intruders. With its help, you can organize monitoring of the site, parking or warehouse, thereby preventing theft or damage to property.
In this article, we will tell you what to look for when choosing a CCTV camera.
Resolution: Make no mistake, but make sure
We have developed a special infographic table (see figure below) that allows you to compare the degrees of image clarity provided by cameras with different sensor resolutions from different distances. It is important to note here that our cameras are equipped with high-quality sensors that provide resolution that fully meets the declared specifications, unlike cheap cameras sold on your favourite marketplace (with a tropical name). The low-quality sensors used in these cameras produce images with noticeable interpolation. You can focus on the declared resolution of the matrix only when buying a camera from a reputable manufacturer – for cheap cameras, it often does not correspond to the actual picture quality, which will be noticeably worse.
The number of megapixels is a quantitative characteristic of the resolution of a camera. The larger this number, the more pixels are contained in each frame captured by the camera. For example, if you compare the quality of video shot with cameras with 2MP and 4MP resolutions, in the second case you can find twice as many fine details. This allows the 4MP camera to use digital zoom and capture a fairly sharp face image from up to 40 feet (12 meters), while the 2MP camera only provides equivalent detail from 20 feet (6 meters), i.e., half as much.
You may alos read: How To Choose A CCTV Camera?
So, ask yourself how far from each camera you need to identify people’s faces. The table above clearly shows the role of resolution in providing clarity and image detail required for face recognition from various distances within a standard viewing angle (about 84 degrees for cameras with a lens with a focal length of 3.6 or 4 mm).
Why do you need cameras – to protect you from thieves or vice versa?
Video recording with dropped out fragments or a jumping picture is a common problem for many owners of CCTV cameras. Jumping recording instead of smooth is obtained when the camera records video at a low frame rate – a small number of frames per second (frames per second, fps). Surveillance cameras from 2013 and older usually recorded at a frame rate of 7 fps – due to the limited processing speed of the camera’s processor or due to lack of space for multi-frame recording on the information carrier. As a result, cameras often failed to capture frames when recording fast-paced action such as armed robbery.
Modern battery security camera typically write at 15 to 30 fps. Cameras that can record at 30 fps are most commonly used to capture license plates or to control cash registers at currency exchanges. In places with low traffic, we recommend setting the video recording rate to 15 fps, which will save storage space when recording content in HD resolution and above. Where you may need to record dynamic scenes, it is recommended to set the recording speed to 30 fps.
If you are looking to choose a good Choosing A CCTV Camera, make sure you learn all about and research it thoroughly before making a final purchase.