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https://issues.apache.org/jira/browse/PDFBOX-4556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16873459#comment-16873459
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Tilman Hausherr commented on PDFBOX-4556:
-----------------------------------------
Your annotation has (again) a PNG image encoded as a JPEG image. Open the PDF
file with an editor you'll see "%PNG" at offset 7274. As I wrote, it's the
annotation that counts, not the page content stream. Just don't use it! If you
want to use a PNG, then use the {{PDPixelMap}} class. You did this, but your
code has:
{code:java}
//resources.addXObject(xobj, "Im"); // just prefix
resources.addXObject(new PDJpeg(doc, new FileInputStream(tickImagePath)), "Im");
{code}
so you commented out the correct code and kept the rest.
Had you used PDFDebugger 2.0.16 on your file, then you would have seen the
error message that it isn't a JPEG.
So please retry with the corrected code.
Another (small) mistake: "150 150 150 150 re" won't paint the rectangle at the
correct place. It should have been "0 0 150 150 re"
Btw you have hit a bug, i.e. that no exception is thrown if a PNG is passed to
a PDJpeg constructor. This has been fixed in PDFBOX-4582.
> how the visual representation of the signature is achieved
> ------------------------------------------------------------
>
> Key: PDFBOX-4556
> URL: https://issues.apache.org/jira/browse/PDFBOX-4556
> Project: PDFBox
> Issue Type: Wish
> Components: .NET
> Affects Versions: 1.8.16
> Reporter: bal
> Priority: Major
> Attachments: as_TobeSigned.pdf, pdfImage-modified-by-tilman.pdf,
> pdfImage.pdf
>
>
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