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https://issues.apache.org/jira/browse/PDFBOX-958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13002898#comment-13002898
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Eric Schwarzenbach commented on PDFBOX-958:
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We also have another document (from a client so I can't share it), with a
number of black and white photos in it, all of which come out with the colors
inverted (like a negative). There is also a non-photographic image, a map,
which gets messed up in an entirely different way. In general our success rate
just trying random PDFs had not been great for images. Could one of the PDFBox
developers comment? Is this an area of the tool that is in rudimentary state?
> convertToImage mangles images which were in the PDF
> ---------------------------------------------------
>
> Key: PDFBOX-958
> URL: https://issues.apache.org/jira/browse/PDFBOX-958
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.2.1, 1.4.0, 1.5.0
> Environment: RHEL5 and WinXP, java version "1.6.0_23"
> Reporter: Eric Schwarzenbach
> Priority: Critical
> Attachments: Image of Page 13.jpeg, Image of Page 13.png, Wrycan®
> Lorem Ipsum Test.pdf
>
>
> Of the PDFs we've tried running through PDFBox and generating page images, a
> number of them (coming from disparate sources and method of creation) seem to
> produce images where an image that was embedded in the page of the PDF shows
> somewhat mangled. It seems to be divided by horizontal stripes, where some
> stripes look normal, others seem to have some kind of "smearing" effect going
> on. See attached images and original PDF (image is of page 13).
> I marked this as critical as we are trying to use PDFBox in a project where
> page images are crucial, and inability to produce reasonable looking page
> images is pretty much a deal breaker.
> The code we use to extract the images looks more or less like the following:
> BufferedImage image =
> page.convertToImage();
>
> SmartDeferredFileOutputStream outStream
> = new SmartDeferredFileOutputStream();
> String[] writerFormatNames =
> ImageIO.getWriterFormatNames();
> ImageIO.write(image, "jpeg", outStream);
> outStream.close()
> We've also tried specifying "png". In both "jpg" and "png" cases we get an
> image file that is indeed the correct format, and both images look exactly
> the same.
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