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https://issues.apache.org/jira/browse/PDFBOX-4320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16624840#comment-16624840
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Christian Lauer commented on PDFBOX-4320:
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Is there no alternative for using JAI? There are so many problems resulting
from this library and there will be more in future since JAI doesn't seem to be
maintained anymore.
Ok, there is the twelvemonkeys project, but as far as I know, they don't
support Jpeg 2000 because of licensing problems.
So is there a light at the end of the tunnel or is there really no chance to
get these imaging issues solved?
> Weird spots in rendering result of scanned PDF 1.6 document
> -----------------------------------------------------------
>
> Key: PDFBOX-4320
> URL: https://issues.apache.org/jira/browse/PDFBOX-4320
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.11
> Reporter: Christian Lauer
> Priority: Major
> Labels: JPEG2000, JPG2000, JPXDecode, JPXFilter
> Attachments: PDFBOX-4320.jp2, scanned.pdf, weired.tiff
>
>
> The rendering of some scanned Documents in PDF 1.6 format result shows weired
> blurred black spots. It seems to me that the scanning software detects form
> areas and moves them in separate elements, which are not rendered by PDFBox.
> The result in Adobe Reader and other conversion tools like Image Magick
> (which is using ghostscript as PDF renderer) is absolute perfect. Besides the
> mentioned spots, there are some other rendering bugs resulting of wrong
> positioning of the graphical elements of the PDF.
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