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{{short description|Metadata standard in digital images}}
{{About|a format for storing metadata in image and audio files|information about filename and directory structures of digital cameras|Design rule for Camera File system}}
{{About|a format for storing metadata in image and audio files|information about filename and directory structures of digital cameras|Design rule for Camera File system}}'''Exchangeable image file format''' (officially '''Exif''', according to JEIDA/JEITA/CIPA specifications) is a standard that specifies the formats for [[image]]s, [[sound]], and ancillary tags used by [[digital camera]]s (including smartphones), scanners and other systems handling image and sound files recorded by digital cameras. The specification uses the following existing file formats with the addition of specific [[Metadata (computing)|metadata]] tags: [[JPEG]] [[discrete cosine transform]] (DCT)<ref>{{Citation |first=N. |last=Ahmed |author1-link=N. Ahmed |first2=T. |last2=Natarajan |first3=K. R. |last3=Rao |title=Discrete Cosine Transform |journal=IEEE Transactions on Computers |date=January 1974 |volume=C-23 |issue=1 |pages=90–93 |doi=10.1109/T-C.1974.223784}}</ref> for compressed image files, [[Tagged Image File Format|TIFF]] Rev. 6.0 (RGB or YCbCr) for uncompressed image files, and [[Resource Interchange File Format|RIFF]] [[WAV]] for audio files (Linear [[Pulse-code modulation|PCM]] or ITU-T [[G.711]] μ-Law PCM for uncompressed audio data, and [[Interactive Multimedia Association|IMA]]-[[ADPCM]] for compressed audio data).<ref>{{cite web |url=http://www.cipa.jp/std/documents/e/DC-008-2012_E.pdf |title=Standard of the Camera & Imaging Products Association, CIPA DC-008-Translation-2012, Exchangeable image file format for digital still cameras: Exif Version 2.3 |access-date=2014-04-08 }}</ref> It is not used in [[JPEG 2000]] or [[GIF]].▼
{{Infobox file format
| screenshot = Epepeotes uncinatus @ Kanjirappally Exif 02.png
| caption = Exif of a file in Wikimedia commons (compact form)
| extension = <tt>.JPG</tt>, <tt>.TIF</tt>, <tt>.WAV</tt>
| owner = [[Japan Electronic Industries Development Association|JEIDA]], now [[Japan Electronics and Information Technology Industries Association|JEITA]], [[Camera & Imaging Products Association|CIPA]]
| released = {{start date and age|1995}}<ref>{{cite web |url=https://www.loc.gov/preservation/digital/formats/fdd/fdd000146.shtml |title=Exif Exchangeable Image File Format, Version 2.2,Sustainability of Digital Formats: Planning for Library of Congress Collections |access-date=2020-08-18}}}}</ref>
| latest release version = 2.32
| latest release date = {{Start date and age|2010|04|26|df=yes}}, revised {{Start date and age|2019|05||df=yes}}
| extended from = [[Tagged Image File Format|TIFF]], [[JPEG]], [[WAV]]
| extended to = [[Design rule for Camera File system|DCF]]
| standard =
}}
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This standard consists of the Exif image file specification and the Exif audio file specification.
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