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Posted to dev@pdfbox.apache.org by "Jani Pehkonen (JIRA)" <ji...@apache.org> on 2018/05/08 14:10:00 UTC
[jira] [Updated] (PDFBOX-4211) Some text is missing in JBIG2 images
[ https://issues.apache.org/jira/browse/PDFBOX-4211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jani Pehkonen updated PDFBOX-4211:
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Attachment: EncodedTable.patch
> Some text is missing in JBIG2 images
> ------------------------------------
>
> Key: PDFBOX-4211
> URL: https://issues.apache.org/jira/browse/PDFBOX-4211
> Project: PDFBox
> Issue Type: Bug
> Components: JBIG2
> Affects Versions: 2.0.9
> Reporter: Jani Pehkonen
> Priority: Major
> Attachments: EncodedTable.patch
>
>
> [This PDF|http://library.sciencemadness.org/library/books/unitized_experiments_in_ochem.pdf] has problems.
> See pages "iii" (2), "ix" (6), "x" (7) etc. These pages have most of their text missing or in wrong position when rendered in PDFDebugger. Each page is a JBIG2 image that uses Huffman encoding. You may need to use for example -Xmx1000M to avoid OutOfMemoryError because the JBIG2 images are very large.
> Apply my patch to file EncodedTable.java in package org.apache.pdfbox.jbig2.decoder.huffman. I have fixed one line of code that does not follow the JBIG2 standard.
> The JBIG2 standard is freely available [here|https://www.itu.int/rec/T-REC-T.88-200002-I/en]
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