Hi,
from readme.txt:
Overview
--------
unpaper is a post-processing tool for scanned sheets of paper, especially for book pages that have been scanned from previously created photocopies. The main purpose is to make scanned book pages better readable on screen after conversion to PDF. Additionally, unpaper might be useful to enhance the quality of scanned pages before performing optical character recognition (OCR).
....
Written by Jens Gulden. Project homepage:
http://unpaper.berlios.de/
I've compiled it for OS/2. It's now available on HOBBES/incoming
http://hobbes.nmsu.edu/cgi-bin/h-browse?dir=/pub/incoming
and will later be moved to
ftp://hobbes.nmsu.edu/pub/os2/apps/graphics/scan/unpaper11.zip
Enjoy
Franz
Source: OS2VOICE