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I don't want any of these files, I've benn hacked.
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{{short description|Metadata standard in digital images}}
{{short description|Metadata standard in digital images}}'''Exchangeable image file format''' (officially '''Exif''', according to JEIDA/JEITA/CIPA specifications) is a standard that specifies formats for images, sound, and ancillary tags used by digital cameras (including smartphones), scanners and other systems handling image and sound files recorded by digital cameras. The specification uses the following existing encoding formats with the addition of specific metadata tags: JPEG lossy coding for compressed image files, TIFF Rev. 6.0 (RGB or YCbCr) for uncompressed image files, and RIFF WAV for audio files (linear PCM or ITU-T G.711 μ-law PCM for uncompressed audio data, and IMA-ADPCM for compressed audio data). It does not support JPEG 2000 or GIF encoded 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}}
{{Infobox file format
| screenshot = Epepeotes uncinatus @ Kanjirappally Exif 02.png
| caption = Exif of a file in [[Wikimedia Commons]] (compact form)
| extension = <code>.JPG</code>, <code>.TIF</code>, <code>.WAV</code>, <code>.PNG</code>,<ref name="Extensions to the PNG 1.2 Specification, Version 1.5.0">{{cite web |title=Extensions to the PNG 1.2 Specification, Version 1.5.0 |website=ftp-osl.osuosl.org |url=http://ftp-osl.osuosl.org/pub/libpng/documents/pngext-1.5.0.html#C.eXIf |access-date=4 March 2021}}</ref><code>.WEBP</code><ref name="The Metadata in WEBP (.webp) files">{{cite web |title= The Metadata in WEBP (.webp) files |website=dev.exiv2.org |url=https://dev.exiv2.org/projects/exiv2/wiki/The_Metadata_in_WEBP_files |access-date=16 Feb 2022}}</ref>
| 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 |website=[[Library of Congress]] |date=26 February 2014 |access-date=2020-08-18}}</ref>
| latest release version = 3.0<ref name="exif30-iptc" />
| latest release date = {{Start date and age|2023|05|df=yes}}<ref name="exif30-iptc" />
| extended from = [[TIFF]], [[JPEG]], [[WAV]]
| extended to = [[Design rule for Camera File system|DCF]]
| standard =
}}
 
▲{{short description|Metadata standard in digital images}}'''Exchangeable image file format''' (officially '''Exif''', according to JEIDA/JEITA/CIPA specifications)<ref>{{Cite web |title=Exif2-1.PDF |url=http://www.exif.org/Exif2-1.PDF |url-status=dead |archive-url=https://web.archive.org/web/20131111073619/http://www.exif.org/Exif2-1.PDF |archive-date=2013-11-11 |format=PDF}}</ref> is a standard that specifies [[file format|formats]] for images[[image]]s, [[sound]], and ancillary tags used by [[digital camerascamera]]s (including smartphones[[smartphone]]s), [[Image scanner|scanners]] and other systems handling image and sound files recorded by digital cameras. The specification uses the following existing encoding formats with the addition of specific [[Metadata (computing)|metadata]] tags: [[JPEG]] lossy coding for compressed image files, [[TIFF]] Rev. 6.0 ([[RGB color model|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]]-[[Adaptive differential pulse-code modulation|ADPCM]] for compressed audio data).<ref name="auto">{{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 does not support [[JPEG 2000]] or [[GIF]] encoded images.
 
This standard consists of the Exif image file specification and the Exif audio file specification.
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===Time Tags===
In addition to the basic date and time tags (<code>DateTime</code>, <code>DateTimeOriginal</code>, and <code>DateTimeDigitized</code>), there are three corresponding "subsecond" tags: <code>SubsecTime</code>, <code>SubsecTimeOriginal</code>, and <code>SubsecTimeDigitized</code>. The <code>SubsecTime</code> tag is defined in version 2.3 as "a tag used to record fractions of seconds for the DateTime tag;"<ref name="auto">{{cite web |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 |url=http://www.cipa.jp/std/documents/e/DC-008-2012_E.pdf |access-date=2014-04-08}}</ref> the <code>SubsecTimeOriginal</code> and <code>SubsecTimeDigitized</code> fields are defined similarly. The subsecond tags are of variable length, meaning manufacturers may choose the number of ASCII-encoded decimal digits to place in these tags. For <code>DateTime = 2000:01:01 00:00:00</code>, the actual time with various subsecond values would be:
* <code>SubsecTime = 2</code>: <code>2000:01:01 00:00:00.2</code>
* <code>SubsecTime = 23</code>: <code>2000:01:01 00:00:00.23</code>
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