JFIF - Revision history

Lucidiot: Add Kaitai Struct schema

2024-12-26T17:49:21Z

Add Kaitai Struct schema

Kunch: Changed link to updated "JFIF poster"

2020-03-02T17:01:27Z

Changed link to updated "JFIF poster"

Dan Tobias at 00:21, 2 June 2019

2019-06-02T00:21:05Z

Jsummers at 17:12, 22 May 2019

2019-05-22T17:12:57Z

Jsummers: PRONOM cleanup

2016-10-24T15:41:36Z

PRONOM cleanup

Jsummers: /* Versions */

2016-06-15T19:31:19Z

‎Versions

Jsummers: /* Specifications */

2015-11-15T15:32:36Z

‎Specifications

Jsummers: /* Versions */

2015-11-14T18:17:20Z

‎Versions

Dan Tobias: /* Links */

2014-11-20T02:23:11Z

‎Links

Jsummers: EGFF link

2014-10-08T00:53:31Z

EGFF link

@@ Line 7: / Line 7: @@
 |pronom={{PRONOM|fmt/42}}, {{PRONOM|fmt/43}}, {{PRONOM|fmt/44}}
 |wikidata={{wikidata|Q26329975}}
 |released=1991
 }}

@@ Line 50: / Line 50: @@
 * [[Wikipedia:JPEG File Interchange Format|Wikipedia article]]
 * {{EGFF|jpeg|JPEG File Interchange Format File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]]
-* [https://twitter.com/angealbertini/status/535157859135127552/photo/1 JFIF poster]
+* [https://github.com/corkami/pics/blob/master/binary/JPG.png JFIF poster]
 [[Category:JPEG]]

@@ Line 6: / Line 6: @@
 |locfdd={{LoCFDD|fdd000018}}
 |pronom={{PRONOM|fmt/42}}, {{PRONOM|fmt/43}}, {{PRONOM|fmt/44}}
 |released=1991
 }}

@@ Line 27: / Line 27: @@
 == Versions ==
-* JFIF 1.00 was the original version.
+* The original version (let's call it JFIF 1.00) must have existed in some form, but little seems to be known about it.
 * JFIF 1.01 (1991-12-10) may have changed the subsampling position to ''centered''.
@@ Line 36: / Line 36: @@
 == Specifications ==
-* [ftp://ftp.tnt.uni-hannover.de/pub/tmp/visualization/graphic-formats/jpeg.jfif.doc.1.01.ps.Z JFIF version 1.01]
+* JFIF 1.02:
-* [http://www.w3.org/Graphics/JPEG/jfif3.pdf JFIF version 1.02]
+** [https://www.w3.org/Graphics/JPEG/jfif3.pdf jfif3.pdf]
-* [http://www.itu.int/rec/T-REC-T.871/en ITU-T Rec. T.871] (not free to download)
+** [http://www.textfiles.com/programming/FORMATS/jpegjfif JFIF description (Eric Hamilton, 1992-09-01)]
-* [http://www.ecma-international.org/publications/files/ECMA-TR/TR-098.pdf ECMA TR/98] (JFIF 1.02)
+** [https://web.archive.org/web/20011026132227/http://www.ijg.org/files/ Archive of www.ijg.org/files/] → jfif.ps.gz, jfif.txt.gz
-* [http://www.iso.org/iso/catalogue_detail.htm?csnumber=54989 ISO/IEC 10918-5:2013 Digital compression and coding of continuous-tone still images: JPEG File Interchange Format (JFIF)] (Not free to download)
+* Based on JFIF 1.02:
 == Links ==
 * [[Wikipedia:JPEG File Interchange Format|Wikipedia article]]
 * {{EGFF|jpeg|JPEG File Interchange Format File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]]
 * [https://twitter.com/angealbertini/status/535157859135127552/photo/1 JFIF poster]
 [[Category:JPEG]]

@@ Line 5: / Line 5: @@
 |mimetypes={{mimetype|image/jpeg}}
 |locfdd={{LoCFDD|fdd000018}}
-|pronom={{PRONOM|fmt/44}}
+|pronom={{PRONOM|fmt/42}}, {{PRONOM|fmt/43}}, {{PRONOM|fmt/44}}
 |released=1991
 }}
@@ Line 27: / Line 27: @@
 == Versions ==
-* JFIF 1.00 (PRONOM: {{PRONOM|fmt/42}}) was the original version.
+* JFIF 1.00 was the original version.
-* JFIF 1.01 (December 10, 1991; PRONOM: {{PRONOM|fmt/43}}) may have changed the subsampling position to ''centered''.
+* JFIF 1.01 (1991-12-10) may have changed the subsampling position to ''centered''.
-* JFIF 1.02 (September 1, 1992; PRONOM: {{PRONOM|fmt/44}}) added an optional JFXX segment, capable of storing a compressed thumbnail image.
+* JFIF 1.02 (1992-09-01) added an optional JFXX segment, capable of storing a compressed thumbnail image.
 * JFIF 2.xx (~2014): Starting with version 9a, the Independent JPEG Group's software supports "JFIF 2.01" (e.g. using <code>cjpeg -bgycc</code>), which apparently implies that the image uses "big gamut YCC". We have not located any specifications for this JFIF version. Note that some buggy JFIF encoders have been known to label a file as version 2.01, when 1.02 was intended.

@@ Line 33: / Line 33: @@
 * JFIF 1.02 (September 1, 1992; PRONOM: {{PRONOM|fmt/44}}) added an optional JFXX segment, capable of storing a compressed thumbnail image.
-* JFIF 2.xx (~2014): Starting with version 9a, the Independent JPG Group's software supports "JFIF 2.01" (e.g. using <code>cjpeg -bgycc</code>), which apparently implies that the image uses "big gamut YCC". We have not located any specifications for this JFIF version.
+* JFIF 2.xx (~2014): Starting with version 9a, the Independent JPG Group's software supports "JFIF 2.01" (e.g. using <code>cjpeg -bgycc</code>), which apparently implies that the image uses "big gamut YCC". We have not located any specifications for this JFIF version. Note that some buggy JFIF encoders have been known to label a file as version 2.01, when 1.02 was intended.
 == Specifications ==