Editing Chroma subsampling (section)

{{Short description|Practice of encoding color images}}

[[File:Common chroma subsampling ratios YCbCr CORRECTED.svg|thumb|Widely used chroma subsampling formats]]

'''Chroma subsampling''' is the practice of encoding images by implementing less resolution for [[Chrominance|chroma]] [[information]] than for [[luma (video)|luma]] information, taking advantage of the human visual system's lower acuity for color differences than for luminance.<ref>
{{cite book
 | title = Vision models and applications to image and video processing
 | chapter = Vision and Video: Models and Applications
 | author = S. Winkler, C. J. van den Branden Lambrecht, and M. Kunt
 | editor = Christian J. van den Branden Lambrecht
 | publisher = Springer
 | year = 2001
 | isbn = 978-0-7923-7422-0
 | page = 209
 | chapter-url = https://books.google.com/books?id=_s2BlAeR66YC&pg=PA209
 }}</ref>

It is used in many video and still image encoding schemes{{snd}}both analog and digital{{snd}}including in [[JPEG]] encoding.