From: Marcelo de Moraes Serpa <celoserpa@gmail.com>
To: Achim Gratz <Stromeko@nexgo.de>
Cc: emacs-orgmode@gnu.org
Subject: Re: [OT] Scanning for archiving
Date: Sat, 5 Nov 2011 14:52:12 -0600 [thread overview]
Message-ID: <CACHMzOGS63L_r5v4x9UY-HvUYKVfZhb4yVawNVv8dtn+9eahEg@mail.gmail.com> (raw)
In-Reply-To: <87fwi2ux4h.fsf@Rainer.invalid>
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Thanks Achim!
On Sat, Nov 5, 2011 at 2:34 PM, Achim Gratz <Stromeko@nexgo.de> wrote:
> Marcelo de Moraes Serpa <celoserpa@gmail.com> writes:
> > I just bought a scanner and started to scan important documents as a
> > backup, and archiving them with meaningful metadata in orgmode files.
> > Then a question came to mind - what dpi to use? I'm not really savvy
> > when it comes to scanning or printing, and I want like a dpi that
> > allows me to reprint the document at an acceptable quality later if
> > necessary, but that also doesn't take that much space (600dpi pdfs
> > take around 5MB).
>
> Fax in fine mode has about 200dpi resolution. The raw scan should be in
> higher resolution (usually 2x-4x the target resolution depending on the
> document quality). The file to be archived then needs to be compressed
> (lossless compression is preferred, e.g. TIFF or PNG) and the bit depth
> reduced (black and white, usually). When making PDF files you need to
> make sure that the image data doesn't get re-coded (often into much
> inferior JPEG). For documents containing (color) images it is often
> preferrable to separately treat text and images. The best compression
> would be achieved if the whole text was extracted via OCR, but that is
> probably a lot more effort than you're willing to spend.
>
>
> Regards,
> Achim.
> --
> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
>
> Samples for the Waldorf Blofeld:
> http://Synth.Stromeko.net/Downloads.html#BlofeldSamplesExtra
>
>
>
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next prev parent reply other threads:[~2011-11-05 20:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-05 20:03 [OT] Scanning for archiving Marcelo de Moraes Serpa
2011-11-05 20:34 ` Achim Gratz
2011-11-05 20:52 ` Marcelo de Moraes Serpa [this message]
2011-11-05 21:01 ` Jan Böcker
2011-11-05 21:06 ` Marcelo de Moraes Serpa
2011-11-05 22:36 ` Pieter Praet
2011-11-05 23:35 ` Samuel Wales
2011-11-06 21:59 ` Pieter Praet
2011-11-07 6:14 ` TP
2011-11-09 8:51 ` Pieter Praet
2011-11-20 13:57 ` Matt Lundin
2011-11-07 17:44 ` Karl Voit
2011-11-09 7:40 ` Pieter Praet
2011-11-09 9:06 ` Johnny
2011-11-09 11:05 ` Karl Voit
2011-11-09 14:53 ` Karl Voit
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