CCITT Group 4 - Revision history

Dan Tobias at 01:33, 25 August 2020

2020-08-25T01:33:14Z

2019-10-28T06:01:31Z

Add list of software

2015-11-11T21:38:15Z

2015-09-04T23:53:55Z

Category:Fax

2013-08-02T19:48:26Z

2013-03-25T21:13:22Z

LoCFDD

2013-03-03T20:21:49Z

2013-02-28T20:33:59Z

Cleanup

2013-02-27T16:30:40Z

Make cat/infobox reflect its place in structure

2013-02-26T18:00:38Z

Expanded this page

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 |formattype=electronic
 |subcat=Compression
 |locfdd={{LoCFDD|fdd000136}}
 |pronom={{PRONOM|x-cmp/15}}

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 == Specifications ==
 * [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]
 == References ==

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 {{FormatInfo
 |formattype=electronic
-|subcat=Graphics
+|subcat=Compression
 |locfdd={{LoCFDD|fdd000136}}
 |pronom={{PRONOM|x-cmp/15}}
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 * [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]
-[[Category:Compression]]
+[[Category:Graphics]]
 [[Category:Fax]]

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 |pronom={{PRONOM|x-cmp/15}}
 }}
-== Overview ==
+[[CCITT Group 4]] is a widely-used lossless compression algorithm for bitonal images. It is also known as '''T6''', '''T.6''', '''Fax4''', '''G4''', '''Group 4''', or '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.
-[[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.
 It uses [[Modified Modified READ]] (MMR) compression. '''MMR''' is probably another synonym for CCITT Group 4.

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 [[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.
-It is based on [[Modified Modified READ]] (MMR) compression.
+It uses [[Modified Modified READ]] (MMR) compression. '''MMR''' is probably another synonym for CCITT Group 4.
 == Related formats ==

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 }}
-[[CCITT Group 4]] is a widely used lossless compression algorithm used for bitonal images. It is also known as '''T.6''', '''Fax 4''', and '''ITU-T Fax Group 4'''. It is frequently used in [[TIFF]] images created by scanning bitonal images.
+[[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.
 It is based on [[Modified Modified READ]] (MMR) compression.
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 In a [[TIFF]] file, compression type 4 is CCITT Group 4.
-In theory, CCITT Group 4 can be used in [[SPIFF]] files (compression type 3).
+Other formats that can use CCITT Group 4 compression include [[PDF]] and [[SPIFF]].
 == See also ==