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https://issues.apache.org/jira/browse/PDFBOX-1018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040661#comment-13040661
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Andreas Lehmkühler commented on PDFBOX-1018:
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I agree with Roland concerning the error message. We should change it to
something more meaningful.
Due to the license issue we can't bundle pdfbox with the mentioned jar so that
it is a good idea to use something else. IMO it doesn't make sense to add a new
dependency only to use a very small piece of it. But the more important fact is
that AFAIK sanslan doesn't support the needed CCITTFaxDecoder.
I'm experimenting with the TIFFFaxDecoder which is part of Apache XMLGraphics
[1]. It works with your pdf but fails with others. I've to dig deeper into it
and try to understand decode algo.
[1]
http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/image/codec/tiff/TIFFImageEncoder.java?view=markup
> PDPage convertToImage bug creates white images from black and white pdf files.
> ------------------------------------------------------------------------------
>
> Key: PDFBOX-1018
> URL: https://issues.apache.org/jira/browse/PDFBOX-1018
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.2.0, 1.2.1, 1.3.1, 1.4.0, 1.5.0
> Environment: JDK 1.6.0_22
> Reporter: Roland Quast
> Assignee: Andreas Lehmkühler
> Priority: Critical
> Labels: pdfbox
> Attachments: BlackAndWhiteBug.java, ColorWorks.java,
> PDFBOX1018-black_and_white1.png, black_and_white.pdf, color.pdf
>
>
> This bug has been reported in various other tickets submitted before. I am
> attempting to conclusively prove that this is an issue, and it needs to be
> attended to since all past tickets regarding this bug have been marked
> invalid.
> I have attached a video showing very basic code that will reproduce the
> issue. I have also attached the code that causes the issue, as well as a PDF
> file that works (a color one), and a black and white PDF file that doesn't.
> The main issue is that when reading a black and white PDF file (see attached
> black and white pdf file), the following message is displayed, and the
> contents of the output image is completely white.
> 26/05/2011 3:20:14 PM org.apache.pdfbox.util.operator.pagedrawer.Invoke
> process
> WARNING: getRGBImage returned NULL
> We use PDFBox in our program for reading PDF files, and at least 50 percent
> of our customer's PDF files (from different scanners) will not read because
> of this issue. This is a complete show stopper, and I'd be more than happy to
> help in any way I could to resolve it.
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