Hi, On Wednesday 03 August 2005 11:29, Udo L?tkemeier wrote: > Hi Gerhard, > > On Tue, 02.08.2005 09:12 +0200, Gerhard Jaeger wrote: > > it's definitly not a SANE bug - it's a problem in fine calibration - if the > > position > > of the fine-calibration strip is not excactly set, you might get those > > stripes - some > > backends tryy to find it automagically, some set them directly. > > > > For the plustek-backend, you might want to test with various values for > > posShadingY (to set in the options section in plustek.conf), try values > > from 10 to 50... > > and make sure to use the latest CVS snapshot - enable debug and try a scan, > > i.e.: > > export SANE_DEBUG_PLUSTEK=19 ; xsane - send us the output. > > thanks for your answer. > Now, i have test posShadingY with various values from 10 to 50. The > value 40 have a little bit reduce the vertical lines in the scans, but > this option don't remove the extreme lines in my scans. Option 40 have > from values 10 to 50 best the "best" result. > > Output(very long) from "export SANE_DEBUG_PLUSTEK=19 ; xsane":
;) > > http://www.udo-luetkemeier.de/temp/xsane.log > > The picture from this scan(please zoom in): > > http://www.udo-luetkemeier.de/temp/scan_with_sane-cvs.jpeg > > This scan was made with following version: > > sane-backends-2005-08-02.tar.gz > > Then, I have this detected: > > When I make with xsane a empty scan, I can better see the vertical > lines. The following picture was the result of a scan with these > settings in xsane: > > "XSane mode" "Save", > "Color", > "Full color range", > "testscan.jpeg", > Step "+1", > Type "JPEG", > resolution "300" dpi, > gamma "0.30", > brightness "-100.0", > contrast "100.0" > > With these stettings, you can best see the lines without a > picture/document. > > http://www.udo-luetkemeier.de/temp/testscan.jpeg > > Are the lines in testscan.jpeg normal or are this lines also _the_ > lines of my other scans? these are the lines that should not appear :( I've done some tests here with a LiDE30 and there were no lines, then I connected the N670 (which should be the same device as the LiDE20) and I see also these damned lines - I don't know currently where the problem is - I have to do some more testing. Ciao, Gerhard
