AGC, or Automatic Gain Control, is a feature in surveillance cameras that adjusts image brightness automatically. It increases the signal strength when lighting is low, helping to keep footage visible in dark conditions.
For example, when a camera records at night or in a dim hallway, AGC boosts the video signal to make details clearer. This allows security teams to monitor areas effectively without manual adjustments.
While AGC improves low-light performance, it can also introduce noise. Therefore, users should balance AGC settings with other tools like infrared lighting or exposure control.
By using AGC correctly, systems can deliver consistent video quality across changing environments.