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Group 4 compression: Revision history

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curprev 09:4009:40, 26 June 2026 SZC 03 talk contribs 2,262 bytes −18 No edit summary undo

curprev 17:2117:21, 8 November 2025 Neiltonks talk contribs 2,280 bytes +65 Importing Wikidata short description: "Bitstream encoding format for still images" undo Tag: Shortdesc helper

curprev 00:5000:50, 17 January 2021 Monkbot talk contribs m 2,215 bytes +2 Task 18 (cosmetic): eval 2 templates: hyphenate params (2×); undo Tag: AWB

curprev 23:1423:14, 26 July 2020 Mikhail Ryazanov talk contribs m 2,213 bytes +17 punct. undo

curprev 12:0912:09, 6 June 2017 199.168.151.173 talk 2,196 bytes +1 × undo

curprev 01:5801:58, 2 October 2016 IceKarma talk contribs m 2,195 bytes −1 →See also: ce undo

curprev 14:0214:02, 23 July 2016 APh talk contribs 2,196 bytes +36 added CIT — one of the first industrial image file formats using G4 undo

curprev 08:5408:54, 26 April 2016 193.85.190.18 talk 2,160 bytes −2 lower-case K should always mean 10^3 (upper-case K or the controvesial "Ki" should be used for 2^10) undo

curprev 13:5613:56, 10 November 2014 Kku talk contribs 2,162 bytes +74 lx undo

curprev 18:2718:27, 12 May 2014 John of Reading talk contribs m 2,088 bytes 0 Typo fixing, replaced: a 8 → an 8 using AWB undo

curprev 01:4101:41, 17 April 2014 Conquerist talk contribs 2,088 bytes −57 fixed wikilinks, changes to improve flow undo

curprev 22:3622:36, 16 April 2014 173.63.34.214 talk 2,145 bytes 0 No edit summary undo

curprev 13:4713:47, 2 January 2014 Conquerist talk contribs 1,808 bytes +4 →See also: more relevant link undo

curprev 17:4317:43, 29 December 2013 Conquerist talk contribs 1,804 bytes +1 WP:MOS undo
curprev 17:4217:42, 29 December 2013 Conquerist talk contribs 1,803 bytes +35 aka modified modified read (see Fax) undo

curprev 12:4212:42, 28 December 2013 Conquerist talk contribs 1,768 bytes +203 →External links: add external link to T.6 recommendation undo

curprev 11:3911:39, 24 November 2013 Codename Lisa talk contribs 1,565 bytes +24 Added {{Compression formats}} undo

curprev 14:0514:05, 22 July 2013 50.46.144.226 talk 1,541 bytes +645 Removed incorrect reference to PNG. Added more details about how G4 works and how it differs from G3. undo

curprev 19:4319:43, 12 June 2013 Adams13 talk contribs 896 bytes +38 added link to Portable Network Graphics file format undo

curprev 21:4521:45, 2 November 2012 ByronAulick talk contribs m 858 bytes +215 Added the compression rate, with an example. undo

curprev 18:0818:08, 11 May 2011 Grump1489 talk contribs 643 bytes +85 No edit summary undo

curprev 19:3119:31, 26 July 2010 LobStoR talk contribs 558 bytes +47 ITU-T T.6 fax standard undo
curprev 19:2419:24, 26 July 2010 LobStoR talk contribs m 511 bytes −14 Undid revision 370053723 by 124.104.190.59 (talk) - false undo

curprev 07:4707:47, 25 June 2010 124.104.190.59 talk 525 bytes +14 No edit summary undo

curprev 08:0808:08, 14 May 2010 Malcolma talk contribs m 511 bytes −16 cat undo

curprev 15:3715:37, 28 April 2010 Rich Farmbrough talk contribs m 527 bytes +31 →External links: Tag uncategorised and general fixes: using AWB undo

curprev 06:1506:15, 4 March 2010 Moxfyre talk contribs 496 bytes +496 ←Created page with ''''Group 4 compression''', usually abbreviated as '''G4''', is a method of image compression used in Group 4 fax machines. It is only used for [[monochrome...'

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