On Sun, 11 Nov 2001, Michael Thomson wrote: > Hi Henning > > Thanks for your tips - I've successfully built & installed > sane-backends-1.06 and sane-frontends-1.06 as well as xsane-0.80 now. > > Sadly I'm still getting weird stripes, but I found a previous discussion on > this and I've mailed the folk involved to see if they made any progress. > > To answer your question, sane-1.05 came precompiled with my distribution: > Yellow Dog Linux 2.1 from Terrasoft (www.yellowdoglinux.com) >
Usually if you get vertical stripes in scanned images, it means that there is no (or there is a wrong type of) shading correction. Every CCD or CIS is composed of photoelements slightly different in characteristics, so usually the scanned images are not directly converted to images but corrected for lamp and sensor unevenness. I had similar problems with Microtek Phantom 636cx, until Karsten Festag corrected the shading function in microtek2. Since then, everything is working fine. The only strange thing in your image is that the stripes are not dark like in my case but coloured. It seems to me it is a wrong (buggy?) shading correction rather than a non-existant one. Or a communication problem between the scanner and the computer which corrupts the data? Levente
