[
https://issues.apache.org/jira/browse/PDFBOX-4484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16790824#comment-16790824
]
Tilman Hausherr commented on PDFBOX-4484:
-----------------------------------------
It happens in 2.0.14, but not in the trunk, so the jbig2 decoder is unlikely to
be the culprit.
> Some JBIG2 images are corrupted when subsampling is enabled
> -----------------------------------------------------------
>
> Key: PDFBOX-4484
> URL: https://issues.apache.org/jira/browse/PDFBOX-4484
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.14
> Reporter: Pete Nattress
> Priority: Minor
> Attachments: test-jbig2.pdf, test-jbig21-no-subsampling.jpg,
> test-jbig21-subsampling.jpg
>
>
> We have observed problems when rendering some PDFs containing JBIG2 images if
> the subsampling option is enabled.
> It is possible to reproduce this with the file I have attached using the CLI:
> {code:java}
> $ java -jar pdfbox-app-2.0.14.jar PDFToImage -subsampling test-jbig2.pdf
> Mar 12, 2019 3:17:09 PM
> org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader from1Bit
> WARNING: premature EOF, image will be incomplete
> {code}
> In the output, the extracted image is distorted and has incorrect dimensions.
> This does not appear to affect all JBIG2 images, for instance the file
> "ItDoesntWorkScan.pdf" attached to PDFBOX-1067 contains a JBIG2 image and is
> rendered correctly with the above code. PDFs containing images encoded with
> algorithms other than JBIG2 also appear to be OK, although I haven't tested
> this exhaustively.
> We have worked around this problem for now by disabling the subsampling
> option.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
