
Anyone interested in digital photography for any length of time will have no doubt come across the term noise reduction. Digital cameras are subject to interference in their signal, referred to as ‘noise’ and usually presented when there is a weak signal or data input – such as when shooting in low light or with a high ISO.
Think of this a bit like turning up the gain knob on an amplifier; the image gets brighter, but at the expense of introducing more digital noise.