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CCTV Systems

Video Surveillance

Video surveillance is a complex electronic mechanism that serves to ensure security, surveillance, and recording data at an object or territory. Technological development of video surveillance does not cover a very long period of time - less than a hundred years. A short time period is inversely proportional to the level of technology development. Video surveillance today - a wide range of features, specifications, applications, the ability to interface with other types of security systems. The video surveillance system consists of video cameras, communication (wired or wireless), as well as a data carrier (computer, video recorder, hard drive).

History of the Development of Video Surveillance

The retrospective of the development of video surveillance originates from the time of the Second World War - the forties of the twentieth century. The German firm "Siemens" has developed a system that would serve to monitor the testing of missiles. The use of video cameras for surveillance in public places began in London in the 60s of the last century. The system of video cameras capable of rotation was first installed in the USA, in the state of New York. Continuous recording became available only in the 70s, before that data was recorded exclusively at the request of the operator. In the 1980s, the first security cameras with color images appeared. In the 21st century, the function of face recognition became available - in recent years, many intercoms with this function have been installed.

Video Surveillance Today

Today, the video surveillance system occupies vast levels of human life. Video surveillance can be found everywhere - from private dwellings (houses and apartments) to huge commercial enterprises and citywide centers. The requirements dictated by an individual object force an individual approach to the choice of video surveillance. The video system that will be installed on the car is different from the store's video surveillance system. The necessary security conditions dictate the degree of manufacturability of the video system. The main characteristics by which systems can differ are the presence of one or more cameras, cameras that provide a color or black and white image, wired or wireless. These and other parameters depend on the level of the protected object.

Analog Surveillance Cameras

There are a lot of variations in the manufacturability of video cameras and their specific capabilities. The clearest distinction is between analog and digital camcorders. Analog cameras are a more economical and less technologically advanced option. The signal from the analog camera is transmitted to a TV, VCR or DVR (in the case of cars). The advantages of such a camera will be the simplicity of design - a camera with a VCR is quite enough. Hence the resulting small size of the analog camera. The absence of complex electronics makes the camera less vulnerable to environmental conditions (cold, moisture, heat). The downside of an analog camera is limited functionality, low shooting resolution, unencrypted data transmission.

Digital IP Surveillance Cameras

Digital video cameras or IP video cameras are more advanced video surveillance technology. Another name for IP cameras is network cameras. The main difference between such a video camera and an analog one is a large amount of electronics. The image from such a camera can be broadcast to home or network computers, compact devices. Compared to analog cameras, network cameras have more settings and modes of operation. It is possible to set the necessary operation parameters on a specific video camera. IP video cameras provide the ability to connect additional memory cards, motion sensors, fire sensors, face recognition sensors and car number plates. The line through which the signal from a digital video camera passes is usually protected. More modern models of digital video cameras can transmit data via Wi-Fi, i.e. without wires. A digital camera, like an analog camera, has its drawbacks. The most common ones are the need for a high-quality communication channel, the availability of additional equipment for correct operation, and the high price.

Security Camera Software

Today, most digital video cameras are connected to a computer. Acquisition and installation of cameras is impossible without software. The security market offers two types of camera software. The first kind is free. Free software is bundled with camcorders and is included in their price. The second type of software requires separate costs, since it is developed for an individual system. Paid software has more functionality. The development of unique software contributes to more flexible operation of the product, an expanded number of functions, and the ability to connect additional cameras. The original software may have a limited validity period, which excludes the possibility of integrating other devices into a digital video surveillance system. There are times when free software is enough, but individual development is always better suited to the specific operating conditions of the equipment.

Equipment for Video Surveillance Systems

Choosing and buying a video surveillance system is not difficult. It is much more important to determine the purpose of the system and ensure correct operation. Video cameras are divided into internal and external. The latter are designed to ensure operation in an aggressive weather environment, as well as with a poor light source. Individual video surveillance systems can be equipped with a video server. Using a video server, the owner of the object can track the processes, being at a considerable distance. In addition, a system with a video server can be additionally equipped with fire alarms, motion sensors, and so on. Despite the widespread use of computers for video surveillance systems, a separate video recorder would be a more rational solution. Such equipment is resistant to power surges, and also has a significant amount of memory.

Surveillance Camera Kit

Video cameras also have a number of features, from the set of which the principle of operation of a particular device can be changed. The lens itself can be monofocal or varifocal. The latter type of lens has a variable focus distance (focus can be changed both manually and electronically), monofocal - constant. Thermal imagers are special sensors that respond to body temperature. They are convenient when you need to detect a person in the dark. Microphones are used to receive both picture and sound at the same time. In some cases, different numbers of cameras and microphones are used.

Prospects for the Use of Video Surveillance

Video surveillance is an innovative invention in the field of security, control and access. The development, which was not so long ago used by the military, is today used for the safety of many people and their property. The development of technologies allows video surveillance systems to be integrated into other communications and security systems. Buying a surveillance system, as well as accessories for it, means investing in the safety of both your own and those around you.