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 > > -- > sane-devel mailing list: sane-devel at lists.alioth.debian.org > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > ? ? ? ? ? ? to sane-devel-request at lists.alioth.debian.org > -- "The truth is an offense, but not a sin"
