Surveillance cameras work by capturing video footage of a specific area and transmitting it to a recording device or monitor for viewing. These cameras use imaging sensors, such as charged-coupled devices (CCDs) or complementary metal-oxide-semiconductor (CMOS) sensors, to convert light into electrical signals.
The captured video footage is then processed by the camera's built-in processor, which can adjust settings such as exposure, focus, and white balance to ensure clear and crisp images. Some surveillance cameras also have infrared sensors to enable night vision capabilities, allowing them to capture footage in low light or complete darkness.
The video data is typically transmitted through cables or wirelessly to a recording device, such as a digital video recorder (DVR) or network video recorder (NVR), where it is stored for later viewing or analysis. Advanced surveillance systems may also have the capability to stream live video footage over the internet, allowing users to monitor the camera feeds remotely using a computer or smartphone.
In summary, surveillance cameras work by using imaging sensors to capture video footage, processing this footage to adjust settings and enhance image quality, and transmitting the video data to a recording device for storage and monitoring.