A surveillance camera works by capturing images or video footage of a specific area or location in real-time. The camera is typically connected to a monitoring system or recording device that stores the footage for later viewing.
Most surveillance cameras use a combination of sensors, lenses, and digital signal processing to capture and process the images. The lens gathers light and focuses it onto a photosensitive sensor, such as a CCD or CMOS sensor. The sensor converts the light into an electronic signal which is then processed and converted into a digital image or video format.
Some surveillance cameras are equipped with motion sensors or infrared technology to detect movement or to enable night vision capabilities. The cameras may also have pan, tilt, and zoom capabilities to allow for remote control of the camera's position and field of view.
Overall, a surveillance camera relies on advanced technology and precise mechanisms to monitor and record activities in a particular area for security or surveillance purposes.