Surveillance cameras, also known as CCTV cameras, function by capturing video footage of a specific area or location for the purpose of monitoring and security. These cameras consist of several key components that work together to record and transmit video data.
Firstly, surveillance cameras are equipped with an image sensor that converts incoming light into electrical signals. The image sensor may be a CMOS sensor or a CCD sensor, both of which are capable of producing high-quality video images.
Once the light is captured by the image sensor, it is processed by the camera's lens and digital signal processor (DSP). The lens focuses the light onto the image sensor, while the DSP adjusts the image quality by enhancing colors, contrast, and other visual elements.
The video data captured by the image sensor is then compressed and stored onto a physical medium, such as a hard drive or memory card. This allows for the footage to be saved and reviewed at a later time.
Surveillance cameras are typically connected to a monitoring system, which can be accessed locally or remotely. The video data is transmitted through cables or wirelessly to a monitor or recording device, where it can be viewed in real-time or recorded for later use.
Overall, surveillance cameras work by capturing light through an image sensor, processing the video data, and transmitting it to a monitoring system for surveillance and security purposes.