Convert PDF/PS to DJVU using DjvuDigital
Source (link to git-repo or to original if based on someone elses unmodified work): Add the source-code for this project on git.opendesktop.org
With the help of this script, a selected PDF or PS-file is being converted into a Djvu-File using a program called DjvuDigital. DjvuDigital has to be compiled from source, which you may find difficult. By default, the script creates a Djvu-file with a resolution of 300 dpi.
You can find out all about DjVuDigital here: http://djvu.sourceforge.net/gsdjvu.html
Read more about the Djvu file format here: http://djvu.org/
