- Use 'scan tailor' - installed on Thinlinc.
Nice article: http://www.heise.de/open/artikel/Toolbox-Scan-Tailor-bringt-gescannte-Dokumente-in-Form-1787142.html (in german)
- Scan Tailor needs 'TIFF' files, not 'PDF'. You can convert PDF to and from TIFF files by using Image Magicks 'convert':
# PDF > TIFF convert source.pdf new.tiff # TIFF > PDF convert source.tiff new.pdf