[Coco] Scanning documents...

[Fedor Steeman]

Thanks, Frank! I found out that scanning at 300dpi and B&W gives fine
results and small files.

Cheers,
Fedor

On 31/03/2008, Frank Swygert <farna at att.net> wrote:
>
> Scanning text in B&W doesn't always produce satisfactory results. If you
> do use B&W, use as high a resolution as the scanner will support (up to 1200
> dpi anyway, but 600 usually produces good results, and some scanners are
> usable at 300). Scan one at 150 dpi intervals (starting at 150) and you'll
> see what I mean, and find the best compromise for your scanner. B&W works
> best on typed sheets of good white paper. Even using a high resolution will
> still produce a compact document because there's only two color levels
> instead of 64 (typical grey scale is 64 shades). Color scans are clearer at
> much lower resolution -- no point in going over 150 dpi though. The
> differing shades take a lot of storage space though. 100 dpi is usually
> clear enough for full color and grey-scale.
> The storage format makes the biggest difference! Many older scanners
> default to TIFF (or TIF) format. Great detail, big files. JPG (or JPEG)
> isn't quite as detailed but has superior compression. It's pretty much a
> standard now and is a great compromise. If your scanner doesn't allow saving
> as a JPG, load the file in your photo/picture editing software and use the
> "save as" feature to change the file format. I do this all the time with
> Corel PhotoPaint. The file will be much smaller with little loss of clarity,
> if any.
> -------------
> Date: Sun, 30 Mar 2008 21:24:50 +1000
> From: "Bob Devries" <devries.bob at gmail.com>
>
> I always scan in Black & White, *unless* the document has colours which do
> not scan properly that way. If necessary, I scan in either colour or
> grayscale, but for just straight text docs, b&w works best.
>
> I think using grayscale does increase the file size significantly.
>
> I have no idea whether Acrobat 6 (which I use) does a better job of
> compression than version 4, or whether the output of the scanner has some
> bearing on that.
>
> What I'll do is print one of those docs from your PDF files, and then
> re-scan that doc, and see if I end up with a significantly smaller doc. I'll
> let you know the result.
>
> --
>
> --
> Frank Swygert
> Publisher, "American Motors Cars" Magazine (AMC)
> For all AMC enthusiasts
> http://farna.home.att.net/AMC.html
> (free download available!)
>
>
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