What is the tradeoff described by the term 'gain' in video technology?

The term 'gain' in video technology specifically refers to the relationship between image brightness and noise. When gain is increased, it amplifies the incoming signal, which can enhance the brightness of an image. However, this amplification also raises the level of noise present in the image, leading to a tradeoff: while the image may appear brighter, it can also become grainier, with unwanted visual artifacts becoming more pronounced.

This is particularly significant in low-light conditions, where increasing gain may be necessary to achieve a usable image, but it can compromise the overall quality due to enhanced noise levels. Understanding this tradeoff is crucial for professionals in video production and surveillance, as they must balance the need for a bright image against the potential detriment to visual clarity and detail caused by increased noise.