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Resources and Ideas

Created by Carl Wilson on Apr 01, 2014 · last edited by Ed Fay · on Sep 02, 2014 (view history) · 9 versions

Resources

GoPortis Github project

https://github.com/friesey/PdfEventPrep

Installation of VirtualBox

In order to check that your VirtualBox and Vagrant installs are working please open a terminal (command line interface) in an empty directory and type:

You should see:

If so try typing:

This should start up a virtual machine image, it will take a minute or two and the output should start:

Once it's finished to test that it's worked try:

which should give the output:

If that's the case tidy up by typing:

If anything seems to go amiss feel free to contact our Technical Lead: carl [at] openplanetsfoundation [dot] org

Software

JHOVE Bespoke PDF Module used by DP Community.
Apache Tika Open Source characterisation / content extraction tool.
Apache PDF Box The Open Source PDF parsing library that powers Apache Tika .
pdfeh PDF Box preflight functionality wrapping.
pdf-preflight A Ruby pre-flight project on GitHub.

Ideas

Some ideas which kind of tools as an output can be useful to build during the Hackathon.

Create a scalable test if the PDF file can be opened by the Acrobat reader by using the (but I guess that is not open source) PDF Library
Create a scalable comparison workflow by converting both PDF files (original and new representation) to images and compare via e. g. matchbox tool if there are visible difference
Idea Andres/Slub about Repair PDF + QA: Save all the PDF objects like e. g. streams, hashmaps, strings, floats in a list and save the MD5 checksum. Reapir the structures of the PDF and put all the objects back. MD5 should not have changed.