CommonG4Doc.tioga
Russ Atkinson (RRA) March 8, 1993 5:03 pm PST
CommonG4Doc
CEDAR 10.1 — FOR INTERNAL XEROX USE ONLY
CommonG4
Common CCITT group 4 decompression code
Russ Atkinson
© Copyright 1993 Xerox Corporation. All rights reserved.
Abstract: Common CCITT group 4 decompression in Cedar.
Created by: Russ Atkinson
Maintained by: Russ Atkinson:PARC:Xerox
Keywords: CCITT group 4, decompression, G4
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For Internal Xerox Use Only
Introduction
CommonG4 is a place to hold onto the common CCITT group 4 decompression code used by both PostScript and Interpress.
The initial decompression code (IPCCITTImpl) was written by Michael Plass for Interpress. It was adapted in early 1993 by Russ Atkinson, who also enhanced the performance.
The PixelArrayCCITTG4 interface allows the creation of a ImagerPixelArray.PixelArray object from a stream. For more detailed manipulation, use the PixelArrayCCITTG4Private interface.