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Everything about Group 4 compression
Bitstream encoding format for still images
CCITT Group 4 compression, also referred to as G4 or Modified Modified READ (MMR), is a lossless method of image compression used in Group 4 fax machines defined in the ITU-T T.6 fax standard. It is only used for bitonal (black-and-white) images. Group 4 compression is based on the Group 3 two-dimensional compression scheme (G3-2D), also known as Modified READ, which is in turn based on the Group 3 one-dimensional compression scheme (G3), also known as Modified Huffman coding. Group 4 compression is available in many proprietary image file formats as well as standardized formats such as TIFF, CALS, CIT and the PDF document format. Wikipedia →
🧭 Start here: a 6-step reading path
- Read the overview: Group 4 compressionA 5-minute orientation
- Skim a recent paper: GroupedMixer: An Entropy Model With Group-Wise Token-Mixers for Learned Image CompressionInfluential work since 2022
- Pick up a classic book: Handbook of Pharmaceutical Manufacturing FormulationsThe most-reprinted book on the subject
- Read the landmark paper: Quantum data compression, quantum information generation, and the density-matrix renormalization-group methodCited 154 times
- Go sideways: FaxA closely related topic
- Go sideways: Run-length encodingA closely related topic
📖 Definitions
No dictionary entry for this exact phrase.
🗂️ The subject at a glance
No outline available.
🏆 Landmark papers (most cited)
Quantum data compression, quantum information generation, and the density-matrix renormalization-group method
Tubular compression fossils from the Ediacaran Nama group, Namibia
Group testing for image compression
Negative group delay and pulse compression in superluminal pulse propagation
Joint Photographic Experts Group (JPEG) compatible data compression of mammograms
Pulse compression in a synchronously pumped optical parametric oscillator from group-velocity mismatch
All-fiber distributed compression of weak pulses in the regime of negative group-velocity dispersion
Compression bounds for Lipschitz maps from the Heisenberg group to L1
🆕 Influential since 2022
GroupedMixer: An Entropy Model With Group-Wise Token-Mixers for Learned Image Compression
Human murmuration: Group polarisation as compression in interaction-language dynamics captured by large language models
An Efficient Approximate Multiplier with Encoded Partial Products and Inexact Counter for Joint Photographic Experts Group Compression
A Novel Deep-Learning Model Compression Based on Filter-Stripe Group Pruning and Its IoT Application
Data-Aware Adaptive Pruning Model Compression Algorithm Based on a Group Attention Mechanism and Reinforcement Learning
📚 Books worth reading
Handbook of Pharmaceutical Manufacturing FormulationsSarfaraz K. Niazi · 2004
Bulletin of the United States Army Medical DepartmentUnited States. Army Medical Service. · 1944
Computer Engineering and TechnologyWeixia Xu · 2013
Technical CommunicationJohn M. Lannon · 2000
Data Communications and NetworkingBehrouz A. Forouzan, Catherine Ann Coombs · 2000
Mixing secrets for the small studioMike Senior · 2011
Automate the Boring Stuff with PythonAl Sweigart · 2015- 📕Compression for great video and audioBen Waggoner · 2010
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
🔗 Related topics
- Fax Fax (short for facsimile), sometimes called telecopying or telefax (short for telefacsimile), is the telephonic transmission of scanned printed material…
- Run-length encoding Run-length encoding (RLE) is a form of lossless data compression in which runs of data (consecutive occurrences of the same data value) are stored as a…
- TIFF Tag Image File Format or Tagged Image File Format, commonly known by the abbreviations TIFF or TIF, is an image file format for storing raster graphics…
- Modified Huffman coding Modified Huffman coding is used in fax machines to encode black-on-white images (bitmaps). It combines the variable-length codes of Huffman coding with…
- JPEG JPEG (/ˈdʒeɪpɛɡ/ JAY-peg, short for Joint Photographic Experts Group and sometimes retroactively referred to as JPEG 1) is a commonly used method of lossy…
- T.38 T.38 is an ITU recommendation for allowing transmission of fax over IP networks (FoIP) in real time. The T.38 fax relay standard was devised in 1998 as…
- Video coding format A video coding format (or sometimes video compression format) is an encoded format of digital video content, such as in a data file or bitstream. It typically…
- JBIG JBIG is an early lossless image compression standard from the Joint Bi-level Image Experts Group, standardized as ISO/IEC standard 11544 and as ITU-T recommenda…