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Re: [OT] scanned files are large in size

From Nicolas George <george@nsup.org>
Newsgroups linux.debian.user
Subject Re: [OT] scanned files are large in size
Date 2019-01-03 14:20 +0100
Message-ID <xcb4J-46O-9@gated-at.bofh.it> (permalink)
References (2 earlier) <xbLDj-5lA-5@gated-at.bofh.it> <xbLWG-5sg-7@gated-at.bofh.it> <xbUdA-2bP-5@gated-at.bofh.it> <xc1f3-6mc-1@gated-at.bofh.it> <xcaV4-43B-5@gated-at.bofh.it>
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Siard (2019-01-03):
> After scanning, an image almost always needs editing. Crop, rotate to
> correct a skew horizon, remove specks, adjust light and contrast.

That depends on the purpose.

>		    Pdfimages can extract the image first, but its
> original format (tiff? jpg? pnm?) remains unclear then, so there is a
> conversion, again causing loss of quality (AFAIU).

You are mistaken. If the image is stored losslessly in the PDF, then
extracting it to any lossless format will not lose any quality. If the
image is stored with a lossy codec, pdfimages can be directed (RTFM) to
re-wrap the codec data in an adequate container, causing no extra loss
of quality either.

Regards,

-- 
  Nicolas George

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Thread

[OT] scanned files are large in size kamaraju kusumanchi <raju.mailinglists@gmail.com> - 2019-01-01 18:40 +0100
  Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-01 19:50 +0100
    Re: [OT] scanned files are large in size Anders Andersson <pipatron@gmail.com> - 2019-01-01 20:00 +0100
      Re: [OT] scanned files are large in size "Thomas Schmitt" <scdbackup@gmx.net> - 2019-01-01 20:30 +0100
      Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-01 20:40 +0100
    Re: [OT] scanned files are large in size kamaraju kusumanchi <raju.mailinglists@gmail.com> - 2019-01-02 04:50 +0100
      Re: [OT] scanned files are large in size tomas@tuxteam.de - 2019-01-02 10:40 +0100
        Re: [OT] scanned files are large in size Joe <joe@jretrading.com> - 2019-01-02 11:10 +0100
          Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-02 11:30 +0100
            Re: [OT] scanned files are large in size deloptes <deloptes@gmail.com> - 2019-01-02 12:10 +0100
            Re: [OT] scanned files are large in size Chris Ramsden <chris.ramsden@gmail.com> - 2019-01-02 12:10 +0100
              Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-02 12:40 +0100
            Re: [OT] scanned files are large in size mick crane <mick.crane@gmail.com> - 2019-01-02 20:20 +0100
              Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-02 20:30 +0100
              Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-03 03:50 +0100
                Re: [OT] scanned files are large in size Siard <shiems146@kpnplanet.nl> - 2019-01-03 14:10 +0100
                Re: [OT] scanned files are large in size Nicolas George <george@nsup.org> - 2019-01-03 14:20 +0100
                Re: [OT] scanned files are large in size deloptes <deloptes@gmail.com> - 2019-01-03 15:20 +0100
                Re: [OT] scanned files are large in size Siard <shiems146@kpnplanet.nl> - 2019-01-03 16:00 +0100
                Re: [OT] scanned files are large in size Nicolas George <george@nsup.org> - 2019-01-03 17:30 +0100
                Re: [OT] scanned files are large in size deloptes <deloptes@gmail.com> - 2019-01-03 17:30 +0100
                Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-03 21:30 +0100
      Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-02 15:50 +0100
        Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-02 16:00 +0100
          Re: [OT] scanned files are large in size deloptes <deloptes@gmail.com> - 2019-01-02 16:20 +0100
            Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-02 16:30 +0100
              Re: [OT] scanned files are large in size deloptes <deloptes@gmail.com> - 2019-01-02 17:20 +0100
                Re: [OT] scanned files are large in size <tomas@tuxteam.de> - 2019-01-02 17:40 +0100
            Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-02 20:10 +0100
          Re: [OT] scanned files are large in size Nicolas George <george@nsup.org> - 2019-01-02 16:20 +0100
            Re: [OT] scanned files are large in size tomas@tuxteam.de - 2019-01-02 16:20 +0100
          Re: [OT] scanned files are large in size Joe <joe@jretrading.com> - 2019-01-02 18:00 +0100
            Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-03 04:10 +0100
        Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-03 03:30 +0100
          Re: [OT] scanned files are large in size kamaraju kusumanchi <raju.mailinglists@gmail.com> - 2019-01-03 05:00 +0100
            Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-04 18:30 +0100
              Re: [OT] scanned files are large in size Gene Heskett <gheskett@shentel.net> - 2019-01-04 19:50 +0100
                Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-04 20:50 +0100
              Re: [OT] scanned files are large in size deloptes <deloptes@gmail.com> - 2019-01-04 20:40 +0100
                Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-04 21:00 +0100
              Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-05 03:20 +0100
  Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-01 21:10 +0100
    Re: [OT] scanned files are large in size kamaraju kusumanchi <raju.mailinglists@gmail.com> - 2019-01-02 05:00 +0100
      Re: [OT] scanned files are large in size Brian <ad44@cityscape.co.uk> - 2019-01-02 20:20 +0100
  Re: [OT] scanned files are large in size Jörg-Volker Peetz <jvpeetz@web.de> - 2019-01-02 12:40 +0100
    Re: [OT] scanned files are large in size kamaraju kusumanchi <raju.mailinglists@gmail.com> - 2019-01-03 05:00 +0100
      Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-03 06:10 +0100
      Re: [OT] scanned files are large in size Jörg-Volker Peetz <jvpeetz@web.de> - 2019-01-03 09:40 +0100
  Re: [OT] scanned files are large in size Jonathan Dowland <jmtd@debian.org> - 2019-01-03 14:50 +0100
    Re: [OT] scanned files are large in size David Wright <deblis@lionunicorn.co.uk> - 2019-01-03 21:50 +0100
      Re: [OT] scanned files are large in size Jonathan Dowland <jmtd@debian.org> - 2019-01-04 11:00 +0100

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