Video denoising is the process of removing noise from a video signal. Video denoising methods can be divided into:
- Spatial video denoising methods, where image noise reduction is applied to each frame individually.
- Temporal video denoising methods, where noise between frames is reduced. Motion compensation may be used to avoid ghosting artifacts when blending together pixels from several frames.
- Spatial-temporal video denoising methods use a combination of spatial and temporal denoising. This is often referred to as 3D denoising.
It is done in two areas:
They are chroma and luminance, chroma noise is where one sees color fluctuations and luminance is where one sees light/dark fluctuations. Generally, the luminance noise looks more like film grain while chroma noise looks more unnatural or digital like.