pdfbox-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PDFBOX-4484) Some JBIG2 images are corrupted when subsampling is enabled
Date Tue, 12 Mar 2019 18:04:00 GMT

     [ https://issues.apache.org/jira/browse/PDFBOX-4484?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tilman Hausherr updated PDFBOX-4484:
------------------------------------
    Affects Version/s: 2.0.9
                       2.0.10
                       2.0.11
                       2.0.12

> 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: 2.0.9, 2.0.10, 2.0.11, 2.0.12, 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: dev-unsubscribe@pdfbox.apache.org
For additional commands, e-mail: dev-help@pdfbox.apache.org


Mime
View raw message