[sane-devel] Canon LiDE 20 vertical lines

[Gian Domeni Calgeer]

Hmm... This seems to be a common problem, maybe a bug in sane (see 
http://lists.alioth.debian.org/pipermail/sane-devel/2005-July/014006.html, 
http://lists.alioth.debian.org/pipermail/sane-devel/2005-July/014018.html, 
http://lists.alioth.debian.org/pipermail/sane-devel/2005-July/014019.html, 
http://lists.alioth.debian.org/pipermail/sane-devel/2005-July/014020.html)

Am Montag, 1. August 2005 01.43 schrieb Udo Lütkemeier:
> Hello,
>
> i have bought a new Canon LiDE 20.
> I have me decide for these Scanner, because these is list on the website
> from the sane-project with status "complete". Also have another LiDE 20
> user from the ELUG(Essener Linux User Group) send me demo-scans.
> These scans have also a good quality.
>
> Yesterday, i have install the Scanner on Debian etch(testing) with
> follow sane version:
>
> $ scanimage --version
> scanimage (sane-backends) 1.0.15; backend version 1.0.15
>
> The Scanner runs also, only the quality is under Linux bad.
> The pictures have dark vertical lines through the scans. :-(
>
> I have make test scans, that you can see these vertical lines. Please
> follow the links to the testscans below.
>
> The lines are not on the glass plate of the scanner and not on the
> original photos.
>
> Yesterday, i have try adjust the settings in xsane. These adjust was of
> no avail. :-(
>
> Now, i have these scanner install on windows. There are no vertical
> lines in the scans. See the links to my testscans below.
>
> I have yesterday also tested the latest snapshot of sane-backends. With
> these, there was the same dark vertical lines.
>
> How can I remove the dark vertical lines in the scans on linux?
>
> Why are these lines not at the demo-scans of the other LiDE 20 user
> from the ELUG on Linux?
>
> Where do the dark vertical lines come from and why are they not on
> windows?
>
> Testscans(please zoom in, that you can better see the lines):
>
> - Testscans with dark vertical lines on Linux:
>
>   http://www.udo-luetkemeier.de/temp/Schnee-Linux.jpg
>   http://www.udo-luetkemeier.de/temp/Berge-Linux.jpg
>
> - Testscans without dark vertical lines on Windows:
>
>   http://www.udo-luetkemeier.de/temp/Schnee-Win.jpg
>   http://www.udo-luetkemeier.de/temp/Berge-Win.jpg
>
> - Testscan without dark vertical lines from another LiDE 20 user from
>   the ELUG on Linux:
>
>   http://www.udo-luetkemeier.de/temp/out0003.jpg
>
> System information:
>
> OS: Debian GNU/Linux etch(testing)
> CPU: Intel P4 2.8 GHz
> RAM: 1024 MB
>
> $ uname -r
> 2.6.8-2-686-smp
>
> sane version:
> $ scanimage --version
> scanimage (sane-backends) 1.0.15; backend version 1.0.15
>
> Scanner:
> $ scanimage -L
> device `plustek:libusb:005:008' is a Canon N670U/N676U/LiDE20 USB
> flatbed scanner
>
> $ sane-find-scanner
> [...]
> found USB scanner (vendor=0x04a9 [Canon], product=0x220d [CanoScan],
> chip=LM9832/3) at libusb:005:008
> [...]
>
> With best regards,
>
> Udo Lütkemeier
>
> --
> Udo Lütkemeier			       http://www.udo-luetkemeier.de
> GPG Key-ID: 0xB234C956           Public key available on my website.
> Key fingerprint = 6827 CC47 6ADE 124B B81A  32E3 00BB FF25 B234 C956