[jira] [Created] (PDFBOX-4484) Some JBIG2 images are corrupted when subsampling is enabled

["Pete Nattress (JIRA)" <ji...@apache.org>]

Pete Nattress created PDFBOX-4484:
-------------------------------------

             Summary: 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
            Reporter: Pete Nattress
         Attachments: test-jbig2.pdf

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