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https://issues.apache.org/jira/browse/PDFBOX-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13068841#comment-13068841
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Mehdi Houshmand commented on PDFBOX-1073:
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Yeah, not my proudest bit of work... But I haven't the time to delve into the
TIFF spec and find out what is wrong with the image in question. The problem is
thus, we have a TIFF embedded in a PDF and as far as I can tell, the TIFF is
corrupted or invalid in some way. When PDFBox attempts to decode the TIFF image
and return a BufferedImage, it throws an error. The TIFF being used is the same
as the one in a previous bug:
https://issues.apache.org/jira/browse/PDFBOX-834, however, because PDFBox has
changed how it handles TIFF images, I have to ensure no regressions occur.
The error is thrown in/near CCITTFaxDecodeFilter, this TIFF doesn't have a "K"
value, so I've set it to default to 0 as in 834, but in
TIFFFaxDecoder.decodeNextScanline() the error is thrown because bits == 0. I
don't have a clue what that means. I'm not even convinced if defaulting "K" to
0 is the right thing to do there.
> Error when handling a TIFF image
> --------------------------------
>
> Key: PDFBOX-1073
> URL: https://issues.apache.org/jira/browse/PDFBOX-1073
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.6.0
> Environment: Ubuntu 11/04
> Reporter: Mehdi Houshmand
> Priority: Trivial
> Attachments: tiffErrorFix.patch
>
>
> There is an error in a TIFF image within a PDF document and when
> PDCcitt.getRGBImage() is called, there is a disparity between current PDFBox
> and v0.8.0. The issue is that there now TIFF decoding features whereas the
> older PDFBox used to hand that off to java.imageio.
> The bug here isn't in the Ccitt decoder, but rather in how
> PDCcitt.getRGBImage() handles an error. Rather than bombing out, I have
> reimplemented the old feature when an error is thrown.
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