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JBIG2 Support In Outside In 8.5.6 And Newer Releases (Related To Symptom: PDF Input Files Viewed As Gray X; Blank/Blurred PDF Pages) (Doc ID 1146284.1)

Last updated on OCTOBER 25, 2022

Applies to:

Oracle Outside In Technology - Version 8.5.6 and later
Information in this document applies to any platform.


Purpose

JBIG2 is a compression used mainly within certain PDF files, such as scanned or faxed documents, for which Outside In 8.5.6 includes expanded support. However, JBIG2 is not fully supported by the Outside In Technology, so this document discusses the known limitations with JBIG2 support in version 8.5.6 and newer releases.

Scope

The Outside In team has seen an increased usage of JBIG2 compression in PDF files in recent years. Due to this increased volume of customer issues, support for JBIG2 is being continuously expanded in each new release, including expanded support for different segment types in the Outside In 8.3.5 release and "Typical Row Prediction" support in the 8.3.7 release.  The 8.5.6 release adds existing functionality but nothing specific that pertains to the categories in this article.  

For most users of Outside In, the specific details of JBIG2 compression are too low-level to be useful in diagnosing problems, or explaining these limitations to customers or developers. Therefore, this document will first give a high-level description of some JBIG2 "features", which are also known as "segment types". Most casual users of Outside In can ignore some of the more low-level notes included in this discussion, but this information has been included for more advanced users who may benefit from this knowledge.

Details

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In this Document
Purpose
Scope
Details
 JBIG2 Segment Types
 Symbol Dictionary Exceptions
 Additional Notes On JBIG2 Support - for older releases
 
 Change History
References

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