Denoising

The process of removing noise from a video signal.

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.

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Denoising
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Adapted from content published on wikipedia.org
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  • Image by Simon Strandgaard: some rights reserved — from flic.kr
Last modified on October 14, 2020, 1:16 am
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