Hi,
Am 16.10.2012 09:15, schrieb Erik Scholtz:
Hi everybody,
Since version 1.2 (Acrobat 3) on, PDF supports OPI. From PDF 1.3 onwards, both
OPI 1.3 and 2.0 comments are supported.
Nowadays it is usual, to use the XMP-Metadata: But I have a lot of old
PDF-files, still containing OPI-Metadata and no XMP-Metadata.
Does anyone of you have a glue, how to get the OPI-data from these PDF with
pdfbox to work with them?
I don't know what OPI is in detail but according to the pdf specs OPI data may
occur within XObjectImages and XObjectForms.
ExtractImages [1] demonstrates where to look for those XObjects. PDFBox doesn't
provide a getter for those OPI data so that you have to get them like this:
XObjectImage xobject = ....
COSDictionary opi = (COSDictionary)xobject.getCOSStream()
.getDictionaryObject("OPI");
The opi dictionary should contain the data you are looking for.
Thanks in advance,
Erik
BR
Andreas Lehmkühler
[1]
http://svn.apache.org/repos/asf/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/ExtractImages.java
