http://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&feed=atom&action=historyCCITT Group 4 - Revision history2024-03-28T15:47:21ZRevision history for this page on the wikiMediaWiki 1.19.2http://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=37752&oldid=prevDan Tobias at 01:33, 25 August 20202020-08-25T01:33:14Z<p></p>
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</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=33736&oldid=prevZzo38: Add list of software2019-10-28T06:01:31Z<p>Add list of software</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Specifications ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Specifications ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.itu.int/rec/T-REC-T.6-198811-I/en T.6 : Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.itu.int/rec/T-REC-T.6-198811-I/en T.6 : Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus]</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== Software ==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [[Farbfeld Utilities]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [[ImageMagick]] (specify the file format as "GROUP4")</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td></tr>
</table>Zzo38http://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=23742&oldid=prevJsummers at 21:38, 11 November 20152015-11-11T21:38:15Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml ITU-T Group 4 FAX Compression (T.6), from Library of Congress resource on Sustainability of Digital Formats]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml ITU-T Group 4 FAX Compression (T.6), from Library of Congress resource on Sustainability of Digital Formats]</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:<del class="diffchange diffchange-inline">Compression</del>]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[Category:<ins class="diffchange diffchange-inline">Graphics</ins>]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Fax]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Fax]]</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=23327&oldid=prevJsummers: Category:Fax2015-09-04T23:53:55Z<p>Category:Fax</p>
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</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=12773&oldid=prevJsummers at 19:48, 2 August 20132013-08-02T19:48:26Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|pronom={{PRONOM|x-cmp/15}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|pronom={{PRONOM|x-cmp/15}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">== Overview ==</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely<ins class="diffchange diffchange-inline">-</ins>used lossless compression algorithm for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4<ins class="diffchange diffchange-inline">''', '''Group 4</ins>''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm <del class="diffchange diffchange-inline">used </del>for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It uses [[Modified Modified READ]] (MMR) compression. '''MMR''' is probably another synonym for CCITT Group 4.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It uses [[Modified Modified READ]] (MMR) compression. '''MMR''' is probably another synonym for CCITT Group 4.</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=10629&oldid=prevJsummers: LoCFDD2013-03-25T21:13:22Z<p>LoCFDD</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div> </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">== Overview ==</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td></tr>
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</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=10211&oldid=prevJsummers at 20:21, 3 March 20132013-03-03T20:21:49Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>It <del class="diffchange diffchange-inline">is based on </del>[[Modified Modified READ]] (MMR) compression.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>It <ins class="diffchange diffchange-inline">uses </ins>[[Modified Modified READ]] (MMR) compression<ins class="diffchange diffchange-inline">. '''MMR''' is probably another synonym for CCITT Group 4</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Related formats ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Related formats ==</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=10132&oldid=prevJsummers: Cleanup2013-02-28T20:33:59Z<p>Cleanup</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as '''T.6''', '''<del class="diffchange diffchange-inline">Fax 4</del>''', <del class="diffchange diffchange-inline">and </del>'''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as <ins class="diffchange diffchange-inline">'''T6''', </ins>'''T.6''', '''<ins class="diffchange diffchange-inline">Fax4''', '''G4</ins>''', <ins class="diffchange diffchange-inline">or </ins>'''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is based on [[Modified Modified READ]] (MMR) compression.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is based on [[Modified Modified READ]] (MMR) compression.</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In a [[TIFF]] file, compression type 4 is CCITT Group 4.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In a [[TIFF]] file, compression type 4 is CCITT Group 4.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">In theory, </del>CCITT Group 4 <del class="diffchange diffchange-inline">can be used in </del>[[SPIFF]] <del class="diffchange diffchange-inline">files (compression type 3)</del>.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Other formats that can use </ins>CCITT Group 4 <ins class="diffchange diffchange-inline">compression include [[PDF]] and </ins>[[SPIFF]].</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=10118&oldid=prevDan Tobias: Make cat/infobox reflect its place in structure2013-02-27T16:30:40Z<p>Make cat/infobox reflect its place in structure</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>{{FormatInfo</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>{{FormatInfo</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>|subcat=<del class="diffchange diffchange-inline">Compression</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>|subcat=<ins class="diffchange diffchange-inline">Graphics</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml ITU-T Group 4 FAX Compression (T.6), from Library of Congress resource on Sustainability of Digital Formats]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml ITU-T Group 4 FAX Compression (T.6), from Library of Congress resource on Sustainability of Digital Formats]</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:Compression]]</ins></div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=CCITT_Group_4&diff=10089&oldid=prevJsummers: Expanded this page2013-02-26T18:00:38Z<p>Expanded this page</p>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. <del class="diffchange diffchange-inline"> </del>It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. <ins class="diffchange diffchange-inline">It is also known as '''T.6''', '''Fax 4''', and '''ITU-T Fax Group 4'''. </ins>It is frequently used in [[TIFF]] images created by scanning bitonal images.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>== <del class="diffchange diffchange-inline">References </del>==</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">It is based on [[Modified Modified READ]] (MMR) compression.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>== <ins class="diffchange diffchange-inline">Related formats ==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">In a [[TIFF]] file, compression type 4 is CCITT Group 4.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">In theory, CCITT Group 4 can be used in [[SPIFF]] files (compression type 3).</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">== See also ==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* [[CCITT Group 3]]</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">== Specifications </ins>==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.itu.int/rec/T-REC-T.6-198811-I/en T.6 : Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.itu.int/rec/T-REC-T.6-198811-I/en T.6 : Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== References ==</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml ITU-T Group 4 FAX Compression (T.6), from Library of Congress resource on Sustainability of Digital Formats]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml ITU-T Group 4 FAX Compression (T.6), from Library of Congress resource on Sustainability of Digital Formats]</div></td></tr>
</table>Jsummers