Introduction: Video surveillance lenses are essential components of video surveillance systems, responsible for capturing outdoor surveillance scenes and projecting them onto a plane. The coordination between surveillance cameras and lenses is crucial to achieve effective video monitoring.   What are Video Surveillance Lenses? Video surveillance lenses are responsible for the on-site video signal acquisition, serving as the original signal source for the entire video image management system.   Classification of Video Surveillance Lenses There are various types of video surveillance cameras, and the classification methods vary according to user needs. Here, we will introduce the classification...

Network video surveillance systems are composed of central management platforms, front-end devices, transmission networks, and client terminals. Let's explore these components in terms of their logical structure and functionalities.   Logical Structure of Network Video Surveillance The network video surveillance system consists of central management platforms, front-end devices, support systems, transmission networks, and client terminals. The central management platform is responsible for controlling signals and commands, media exchange, user management, business management, network management, billing management, and statistical analysis. The central management unit, media distribution unit, media storage unit, and business management unit collectively handle control...

The development of network video surveillance technology has gone through four stages:   (1) Close-range Monitoring: In the early stage of video surveillance, video images were transmitted from the front-end monitoring points to the monitoring center through coaxial cables and displayed on the monitoring equipment. As the number of monitoring points increased, the cost and management difficulty of video display and recording equipment also increased significantly. The introduction of video matrix technology effectively addressed these issues by allowing multiple video images to be switched, displayed, and shared. However, analog video transmission was limited and did not...