Surveillance cameras work by capturing video footage of a certain area or space in real time. These cameras are equipped with lenses that focus light onto a sensor, which then converts the light into an electrical signal. This signal is then processed by a video processing unit, which converts the signal into a digital video format that can be viewed and recorded.
The video footage captured by surveillance cameras can be monitored in real time by security personnel or stored for later review. Some surveillance cameras also have built-in motion sensors that can trigger recording when movement is detected in the camera's field of view.
Surveillance cameras can be connected to a central monitoring system via wired or wireless networks, allowing for remote monitoring and control. In addition, some cameras are equipped with advanced features such as infrared night vision, pan-tilt-zoom capabilities, and facial recognition technology.
Overall, surveillance cameras play a crucial role in enhancing security and providing valuable evidence in the event of any incidents or crimes. Their ability to continuously monitor and record activities makes them an essential tool in modern security systems.