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 L?tkemeier: > 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 L?tkemeier > > -- > Udo L?tkemeier 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