Scan document pages to a compressed PDF

[Ed Suominen]

I'd like to write a Python-based commandline tool that will scan pages with
SANE, applying CCITT Group 4 compression during scanning, and produce a
single PDF file. I would release it under GPL. Right now, I'm relying on a
workable but inflexible shell script that pipes stuff between scanimage,
tiffcp, tiff2ps, and ps2pdf.

What's the best way currently to do CCITT4 compression (e.g., of
intermediate TIFF-format images) from Python? PIL doesn't seem to support
CCITT4 compression, and the read-only patch [1] that's available won't help
in my case. I'd like to incorporate as much as possible into the Python
code and imported packages, rather than relying on pipes to a bunch of
external programs.

Same question regarding SANE -- I can't seem to find the supposed PIL
support for SANE in the release on my system. Anyone know about that, or
alternatives?

---
Ed Suominen
Registered Patent Agent
Open-Source Software Author (yes, both...)
Web Site: http://www.eepatents.com

[1] http://mail.python.org/pipermail/image-sig/2003-July/002354.html

 

[Paul Rubin]

What's the best way currently to do CCITT4 compression (e.g., of
intermediate TIFF-format images) from Python? PIL doesn't seem to support
CCITT4 compression, and the read-only patch [1] that's available won't help
in my case. I'd like to incorporate as much as possible into the Python
code and imported packages, rather than relying on pipes to a bunch of
external programs.

I ended up doing about the same thing as you, generating shell scripts
to run existing command line stuff.

This might also be of some interest: http://tumble.brouhaha.com/

 

[Ed Suominen]

Replying to my own post, this looks like a very promising tool:

"Pytiff is a library for using TIFF files and advanced imaging in Python."
http://pubweb.northwestern.edu/~omh221/software_projects/pytiff/pytiff.html