plustek: HP2200 calibration and version 0.44-0
Subject:
Re: HP2200 calibration and version 0.44-0
From:
Mike Causer ####@####.####
Date:
2 Oct 2002 20:09:19 -0000
Message-Id: <20021002210638.5f116f8a.mikec@mikecauser.org>
On Tue, 1 Oct 2002 18:13:33 +0200 Jaeger, Gerhard wrote:
> Tell me your investigation results...
There seem to be two problems, which I call the "brown stripe" and the
"light stripes". They will only appear against medium density parts of
the scan, never against light or very dark parts.
When they do appear they are always at the same X co-ordinates of the
scanner.
This might make you immediately think that the scanner is dirty or
faulty, but the scanner glass has been cleaned with iso-propyl alcohol
and has no marks or unevenness visible under a strong light from above.
And the same problems do not show up with Sane-plustek 43.3
The website images (4 at ~40Kb each) do show some effects of the pnm to
jpg conversion, but I expect that no-one really wants the 0.75Mb
originals;-)
There are at least 5 light stripes, maybe more, and one or maybe two
brown stripes. There is always one at 145mm in X, and about 1.5-2.0mm
wide in glass co-ordinates -- and perhaps another at 222mm in X, but
this may be an "edge of scan" effect.
Pictures and log files at http://www.mikecauser.org/hp2200-2.html
Cheers,
Mike
--
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