JPEG - Revision history

Dexvertbot: /* Sample files */

2023-12-28T05:18:50Z

‎Sample files

Jsummers: Updating old ExifTool links

2023-09-23T14:17:37Z

Updating old ExifTool links

Eiim: Add Kaitai Struct

2023-09-15T01:52:04Z

Add Kaitai Struct

Parchivist: /* External links */

2023-08-28T14:38:28Z

‎External links

Thorsted: /* Identifiers */

2023-05-25T18:59:39Z

‎Identifiers

Sembiance: /* Sample files */

2020-07-26T20:43:01Z

‎Sample files

Johanvanderknijff: /* External links */

2020-07-15T15:34:18Z

‎External links

Sembiance: Added sample file

2020-05-26T15:02:29Z

Added sample file

Jsummers: /* Specifications */

2020-01-24T13:26:25Z

‎Specifications

Jsummers at 15:40, 16 November 2019

2019-11-16T15:40:55Z

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 == Sample files ==
-* https://telparia.com/fileFormatSamples/image/jpg/
+* {{DexvertSamples|image/jpg}}
 == Metaformat files ==

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 * [http://www.itu.int/rec/T-REC-T.851-200509-I/en ITU-T Rec. T.851]: (JPEG-1)-based still-image coding using an alternative arithmetic coder
 * [http://www.itu.int/rec/T-REC-T.872/en ITU-T Rec. T.872]: Application to printing systems
-* [http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html#Adobe ExifTool: The APP14 "Adobe" segment]
+* [https://exiftool.org/TagNames/JPEG.html#Adobe ExifTool: The APP14 "Adobe" segment]
 * ISO/IEC 10918: Digital compression and coding of continuous-tone still images
 ** [http://www.iso.org/iso/catalogue_detail.htm?csnumber=18902 ISO/IEC 10918-1:1994] - Requirements and guidelines
@@ Line 229: / Line 229: @@
 == External links ==
 * [[Wikipedia:JPEG|JPEG (Wikipedia)]]
-* [http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html ExifTool JPEG Tags]
+* [https://exiftool.org/TagNames/JPEG.html ExifTool JPEG Tags]
 * [https://www.disktuna.com/list-of-jpeg-markers/ List of JPEG Markers]
 * [http://blog.sucuri.net/2013/07/malware-hidden-inside-jpg-exif-headers.html Malware Hidden Inside JPG EXIF Headers]

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 |wikidata={{wikidata|Q27996264}}
 |released=1992
 }}
 '''JPEG''' is a popular raster image format well-suited to photographic images. It usually uses lossy [[DCT compression]]. It is named after the Joint Photographic Experts Group, the organization which developed the format. It is sometimes called '''JPEG1''', '''JPEG-1''', or '''JPEG 1992''' to help disambiguate it. (Also see [[JPEG 2000]] and [[JP2]].)

@@ Line 229: / Line 229: @@
 * [[Wikipedia:JPEG|JPEG (Wikipedia)]]
 * [http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html ExifTool JPEG Tags]
 * [http://blog.sucuri.net/2013/07/malware-hidden-inside-jpg-exif-headers.html Malware Hidden Inside JPG EXIF Headers]
 * [http://www.theatlantic.com/technology/archive/2013/09/what-is-a-jpeg-the-invisible-object-you-see-every-day/279954/ What Is a JPEG? The Invisible Object You See Every Day]

@@ Line 69: / Line 69: @@
 |[[JFIF]] 1.02    || {{PRONOM|fmt/44}}    || {{LoCFDD|fdd000018}}
 |-
-|Exif 2.0 JPEG    || {{PRONOM|x-fmt/398}} ||rowspan="3"| {{LoCFDD|fdd000147}}
+|Exif 2.0 JPEG    || {{PRONOM|x-fmt/398}} ||rowspan="5"| {{LoCFDD|fdd000147}}
 |-
 |Exif 2.1 JPEG    || {{PRONOM|x-fmt/390}}
 |-
 |[[Exif]] 2.2 JPEG || {{PRONOM|x-fmt/391}}
 |-
 |[[SPIFF]]        || {{PRONOM|fmt/112}}   || {{LoCFDD|fdd000019}}

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 * [http://openpreservation.org/blog/2017/04/09/using-exiftool-to-address-tag-out-of-sequence-errors-in-images-and-a-101-level-dive-into-tags/ Using EXIFTool to address “Tag out of sequence” errors in images (and a 101 level dive into tags)]
 * [https://openpreservation.org/blog/2019/11/07/jpeg-got-the-blues/ JPEG Got the Blues] - on properly rendering 32-bit (CMYK) JPEGs
 == References ==

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 ** [https://www.iso.org/standard/78466.html ISO/IEC 19566-7]: JPEG Linked Media Format
 * [https://jpeg.org/downloads/jpeg/wg1n76028-CfP-JPEG-reference-software.pdf Final Call for Proposal for a JPEG Reference Software] (2017-07)
 == Metaformat files ==

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 ** ISO/IEC 10918-5:2013 - Refer to [[JFIF]]
 ** [http://www.iso.org/iso/catalogue_detail.htm?csnumber=59634 ISO/IEC 10918-6:2013] - Application to printing systems
 * [https://jpeg.org/jpegsystems/index.html ISO/IEC 19566: JPEG Systems] (a collection of JPEG-related standards)
 ** [https://www.iso.org/standard/65348.html ISO/IEC 19566-1]: Packaging of information using codestreams and file formats
@@ Line 196: / Line 197: @@
 ** [https://www.iso.org/standard/73607.html ISO/IEC 19566-4]: Privacy, security and IPR features
 ** [https://www.iso.org/standard/73604.html ISO/IEC 19566-5]: JPEG Universal Metadata Box Format (JUMBF)
-** ISO/IEC 19566-6 = [[JPEG 360]]
+** ISO/IEC 19566-6 - Refer to [[JPEG 360]]
 * [https://jpeg.org/downloads/jpeg/wg1n76028-CfP-JPEG-reference-software.pdf Final Call for Proposal for a JPEG Reference Software] (2017-07)

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 * [[FlashPix]] data is contained in APP2 "FPXR" segments in Exif-compliant JPEGs. Refer to the [[Exif]] specification.
 * [[Photoshop Image Resources]] is contained in an APP13 "Photoshop 3.0" segment.
-* [[IPTC]] metadata often appears in JPEG files, embedded in [[Photoshop Image Resources]].
+* [[IPTC-IIM]] metadata often appears in JPEG files, embedded in [[Photoshop Image Resources]].
 * [[XMP]] metadata is contained in an APP1 <nowiki>"http://ns.adobe.com/xap/1.0/"</nowiki> segment.
 * [[ICC profile]] data is contained in an APP2 "ICC_PROFILE" segment.
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 == Notes ==
 When saving a JPEG image from [[Twitter]] in Google Chrome / Chromium, it will save with the default extension '''.jpg-large'''. This is due to a [https://code.google.com/p/chromium/issues/detail?id=172529 known bug] (and one which shows no signs of being solved any time soon) in the way the browser sanitises Twitter image URLs (the filename is determined to be e.g. Xyzxyzxyz.jpg:large, which is sanitised to Xyzxyzxyz.jpg-large).
 == External links ==
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 * [http://openpreservation.org/blog/2017/04/09/using-exiftool-to-address-tag-out-of-sequence-errors-in-images-and-a-101-level-dive-into-tags/ Using EXIFTool to address “Tag out of sequence” errors in images (and a 101 level dive into tags)]
 * [https://openpreservation.org/blog/2019/11/07/jpeg-got-the-blues/ JPEG Got the Blues] - on properly rendering 32-bit (CMYK) JPEGs
 [[Category:Compression]]
 [[Category:JPEG (organization)]]