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https://issues.apache.org/jira/browse/PDFBOX-6199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18077613#comment-18077613
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Maruan Sahyoun commented on PDFBOX-6199:
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That's more or less what I'm currently working on. Having a slow but pixel safe
version to verify the logic. What the improvement shows IMHO is an error in the
sliding window byte to pixel handling we currently have. Will post my result
here too.
> Template 1 handling with TPGRON not supported
> ---------------------------------------------
>
> Key: PDFBOX-6199
> URL: https://issues.apache.org/jira/browse/PDFBOX-6199
> Project: PDFBox
> Issue Type: Sub-task
> Components: JBIG2
> Affects Versions: 3.0.4 JBIG2
> Reporter: Maruan Sahyoun
> Priority: Minor
> Attachments: image-2026-04-28-12-27-28-955.png,
> image-2026-04-28-12-28-19-575.png, image-2026-04-28-12-29-21-038.png,
> screenshot-1.png, screenshot-2.png, screenshot-3.png, screenshot-4.png
>
>
> {{bitmap-refine-template1-tpgron.jbig2}} tests the folling features of JBIG2:
> - Refinement region
> - Template 1
> - TPGRON
> - Reference bitmap reuse
> We currently produce garbled output when decoding
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