The most important trends of the supervisory
In just a few decades, the video surveillance industry has developed technologies fabulous and has changed substantially the way in which it conducts business around the branches. From the first models of systems, analog up to IP surveillance systems today, the change has been a constant element. Today, this change takes place at an accelerated pace and there are no signs that it will slow down too soon.
The use of software applications for management systems (ex: mobile app) recorded a strong growth, and the prediction is an increase of at least 7%. IP surveillance systems these days offer maintenance and powerful benefits of management, and at the same time allow for future expansion and flexibility.
The safety of cybernetics has become critical in everyday life, transforming it thus into a market segment major and, of course, significant. As more and more cases of information theft are reported, concerns over the skills of protecting the networks is intensifying. As a result, careful buyers are turning to data protection.
As a result of the increases the threats of security in the last year, the security of the public becomes a priority. With the help of advanced technology used by the surveillance systems with the analysis of the video files, but also with the centers of command and control found in the systems of Public Security, the video resources will enable citizens to improve their response time the face of various incidents and will function as a tool of help to the citizens.
Another change comes from the perception of citizens vis a vis security systems street. The tendency to look them as a tool of government control is replaced with the perception of providing a more secure environment.
Just as the visibility of the human can be clarified through a lens with diopters larger or smaller, to view more clear at distance or near, it can be clarified and the image of a CCTV cameras through the choice of a lens suited.
When purchasing a video surveillance system you need to take into account and the lens of the camera, because this is one of the most important elements for a video recording quality, and without it, the camera would not be functional.
The selection process is very simple and does not require any technical knowledge.
Types of lenses
– Fixed lens
– Lenses varifocale
– Lens motorized zoom
The human eye is the equivalent of a lens CCTV camera fixed 3mm; the most common type of lens fix for cameras is 3.6 mm, so the viewing angle of the human eye on the line right is about 80 degrees, and the angle of the CCTV cameras with a lens fixed 3.6 mm, is about 75 degrees, with a distance of viewing of approximately 30 metres.
As the lens increases, so the angle of view narrows, for example, a lens fix 16mm has an angle of about 20 degrees.
The most common and used lenses varifocale are 2.8-12mm due to its versatility. They allow you to adjust manually the lens from 2.8 mm (wide angle) to 12 mm (zoom), so you can focus on a particular area, anytime you want. The lens varifocala is useful as it gives you total control over the cameras. The adjustment is made either through an allen wrench, either directly on the OSD of the camera, depending on what model of camera you choose.
Rooms varifocale are most often used for cash registers, supervision of hallways, to access areas in buildings or for supervision cars in the parking lot. No matter what area you use them are useful long-term and can adapt very easily depending on your preference.
Important! The size of the angle is inversely proportional to the size of the lens.
Another type of lens would be the lens motorized zoom, considered all lenses varifocale in industry health surveillance, they have a greater capacity to capture detail (due to zoom, activated by a mini motor built-in). This can be adjusted manually or electronically and is i meets often PTZ (Pan Tilt Zoom). The Zoom for these cameras can be controlled in several ways: directly from the DVR, joystick or through a special remote control. It is often used in cases such as: the recognition of the tiles of license plate, facial recognition, etc.