Hi all. Is it possible that the stripes in the Avision-USB scans appear, because we do no yet do any calibration? (The SCSI ones do not need / and even to do support it). - But they are really black and very regular ... ???
http://www.rhrk.uni-kl.de/~bauerc/ct-cut.jpeg http://www.neatech.nl/oss/HP5300C/stripe.jpg Hm. Now when I watch to these two pictures they are not as black as the ones I got via eMail. Seems to be clear that the USB scanners _simply_ need software calibration and software color pack (color channel displacement). I will do this in the next days ... On Mon, 12 Nov 2001 06:25:15 +0100 (MET) Novak Levente <[email protected]> wrote: > 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 k33p h4ck1n6 René -- René Rebe (Registered Linux user: #127875 <http://counter.li.org>) eMail: [email protected] [email protected] Homepage: http://www.tfh-berlin.de/~s712059/index.html Anyone sending unwanted advertising e-mail to this address will be charged $25 for network traffic and computing time. By extracting my address from this message or its header, you agree to these terms.
