Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

pdfbeads problem under Ubuntu Linux 14.04

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Storm
Posts: 1
Joined: 21 Feb 2016, 12:17
E-book readers owned: iPAD
Number of books owned: 600
Country: Germany

pdfbeads problem under Ubuntu Linux 14.04

Post by Storm » 29 Mar 2016, 12:52

Hello to all Book-Scanners out in the world.

I am pretty new to this forum but I am already addicted about digitally preserving information about things that otherwise will be lost in the future..

I read Nate Crowns web article about book-scanning under Linux and tried to install all necessary tools to build good quality PDF-Documents with lowest possible data sizes.

I am not an in-depth-user of Ubuntu-Linux, so the installation of all necessary software pieces took quite a while due to the numerous dependencies that are not documented and lead to lots of problems if something is missing...

I am finally able to run pdfbeads to bind my ScanTailor output but it only seems to work with mixed mode pages that include text and picture areas...
Text-only pages cause the error-message below and I have no clue what to do in this case:

walter@Ubuntu-ThinkPad-T43p:~/work/out$ pdfbeads Philips_PM6303_OM-001.tif > test.pdf
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': iconv will be deprecated in the future, use String#encode instead.
[DEPRECATION] requiring "RMagick" is deprecated. Use "rmagick" instead
Prepared data for processing Philips_PM6303_OM-001.tif
JBIG2 compression complete. pages:1 symbols:2 log2:1
/var/lib/gems/1.9.1/gems/pdfbeads-1.1.1/lib/pdfbeads/pdfpage.rb:483:in `block in jbig2Encode': undefined method `>' for nil:NilClass (NoMethodError)
from /var/lib/gems/1.9.1/gems/pdfbeads-1.1.1/lib/pdfbeads/pdfpage.rb:461:in `each_index'
from /var/lib/gems/1.9.1/gems/pdfbeads-1.1.1/lib/pdfbeads/pdfpage.rb:461:in `jbig2Encode'
from /var/lib/gems/1.9.1/gems/pdfbeads-1.1.1/bin/pdfbeads:225:in `<top (required)>'
from /usr/local/bin/pdfbeads:23:in `load'
from /usr/local/bin/pdfbeads:23:in `<main>'


In my humble opinion the JBIG2 compression worked, but something is wrong with the ruby script "pdfpage.rb", which is part of the pdfbeads1.1.1-package. I have no clue about ruby and just installed it to be able to run pdfbeads... Maybe I am still missing another dependency but I am not aware what I might have missed to install.

Can anyone in this forum give me a helping hand in order to solve this problem so I can finally use the pdfbeads-script to produce high-quality, low size pdf-manuals of my measurement gear? The file I tried to convert above is attached to this message.

Hoping for some suggestions,

Walter
Attachments
Philips_PM6303_OM-001.tif

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