Scan document pages to a compressed PDF

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  • Ed Suominen
    #1

    Scan document pages to a compressed PDF

    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/ima...ly/002354.html
    Tags: None
    • Paul Rubin
      #2
      Re: Scan document pages to a compressed PDF

      Ed Suominen <ed-no@spam-eepatents.com> writes:[color=blue]
      > 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.[/color]


      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/

        Comment

        • Ed Suominen
          #3
          Re: Scan document pages to a compressed PDF

          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


          Ed Suominen wrote:
          [color=blue]
          > 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/ima...ly/002354.html[/color]

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