FAX image compression/decompression

[Glenn Roberts]

>"Is anyone aware of Sun software (preferably shareware) that implements
>the CCITT Group IV (Facsimile) binary image compression/decompression
>algorithm? 

I received this response from our local Sun office:

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"Sun Cunsulting Special" call your sales rep and order it today!  (:-)

Price:
                        Single        Quantity 10   Unlimited   Upgrade
CONSULT-FAXCOMP           300             900         4,000       300

"The Consulting CCITT Image Compression/Decompression Special is a
software implementation of the Group 3 1-dimensional and the Group 4
2-dimensional digital facsimile transmission standards as defined by
the CCITT (Comite Consultatif International Telegraphique et
Telephonique), an international standards defining body.  These are the
compression/decompression schemes used for FAX facsimile transmission.

"The Group 3 1-dimensional scheme encodes an input image run length
using a modified Huffman code to produce the transmittable facsimile.
The Group 4 2-dimensional encoding is an extension to the Group 3
1-dimensional algorithm (mentioned above) and is known as the modified
READ (relative element address designate) code.  It is a more efficient
coding technique and has been designed for future expansion in the
areas of color-coding, grey-scaling, and pattern recognition."

(source is included)

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- Glenn Roberts, The MITRE Corp., McLean VA (703) 883-6820
  gfr at cobra.mitre.org