Image

===Still or moving===
[[File:Pencil drawing of a girl in ecstasy.jpg|thumb|2D image|alt=Picture, Image]]
A ''{{vanchor|still image}}'' is a single [[wikt:static|static]] image.<ref>{{Cite journal |last=Woodcock |first=Karen |date=2011-06-26 |title=Static Image |url=https://www.slideshare.net/Kazmania/static-image#:~:text=What%20is%20a%20Static%20Image,combining%20visual%20elements%20with%20words. |url-status=dead |journal=Slideshare |publisher=Scribd |archive-url=https://web.archive.org/web/20220922000929/https://www.slideshare.net/Kazmania/static-image#:~:text=What%20is%20a%20Static%20Image,combining%20visual%20elements%20with%20words. |archive-date=Sep 22, 2022}}</ref>{{Unreliable source?|date=February 2023}}<ref>{{Cite web |title=Still Image File |url=https://www.archives.gov/preservation/products/definitions/raster-type.html |url-status=live |archive-url=https://web.archive.org/web/20221016225535/https://www.archives.gov/preservation/products/definitions/raster-type.html |archive-date=Oct 16, 2022 |website=National Archives}}</ref> This phrase is used in photography, visual [[Electronic media|media]] and the [[computer industry]] to emphasize that one is not talking about movies, or in very precise or pedantic technical writing such as a [[Standardization|standard]].

A ''{{vanchor|moving image}}'' is typically a movie ([[film]]) or [[video]], including [[digital video]]. It could also be an [[animation|animated display]] such as a [[zoetrope]].

A [[still frame]] is a still image derived from one [[Film frame|frame]] of a moving one. In contrast, a [[film still]] is a photograph taken on the set of a movie or television program during production, used for promotional purposes.

In [[image processing]], a '''picture function''' is a mathematical representation of a [[two-dimensional]] image as a [[Function (mathematics)|function]] of two [[Spatial dependence|spatial variables]].<ref>{{cite web|url=https://www.jstor.org/stable/2301228 |title=Meaning and Function of a Picture, Published by:Taylor & Francis, Ltd. on behalf of the Mathematical Association of America, DOI: 10.2307/2301228on Jstor.Org|jstor=2301228 }}</ref> The function f(x,y) describes the [[Amplitude|intensity]] of the point at [[coordinates]] (x,y).<ref>{{cite book
  | last = Forsyth
  | first = David
  | author2=Ponce, Jean
  | title = Computer Vision: A Modern Approach
  | publisher = Prentice-Hall
  | year = 2002
  | url = http://www.cs.berkeley.edu/~daf/book.html
  | isbn = 978-0-13-085198-7 }}</ref>