[sane-devel] [genesys] canon lide 210: scans contain circles

[m. allan noah]

Those circles are called half-toning. Look at your original paper with
a magnifier, and you will see them.

allan

On Wed, Jun 8, 2011 at 3:22 PM, Jiri Slaby <jirislaby at gmail.com> wrote:
> Hi,
>
> I've just bought a Canon Lide 210 scanner. So I've enabled genesys
> driver and ran xsane.
>
> I did no calibration as described in the manpage as there is no cal
> sheet and no --calibrate option for scanimage. So I took a preview and
> did a real scan then. But after scanned, the picture contains small (7px
> in diameter) circles. This can be seen here (16M picture, 1200 dpi, full
> color):
> http://www.fi.muni.cz/~xslaby/sklad/circles.png
>
> The same happens for grey-scale scans.
>
> Is it that the scanner is that bad? Or is it broken? Or is there
> something I should set? I tried despeck and swdespeck options without
> any changes.
>
> Note that I can't set resolution to 2400. Neither with scanimage, nor in
> xsane. Why? According to changelog and git commits in git, this should
> be already supported in my version. Regarding versions, I have:
> sane-backends-1.0.22-13.2.x86_64
> xsane-0.998-7.2.x86_64
> from openSUSE Factory.
>
> thanks,
> --
> js
>
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