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<TITLE>sane-devel: Re: Problems with Mustek 1200 SP, mode color</TITLE>
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<META NAME="Author" CONTENT="Henning Meier-Geinitz (hmg-ml@gmx.de)">
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<META NAME="Subject" CONTENT="Re: Problems with Mustek 1200 SP, mode color">
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<H1>Re: Problems with Mustek 1200 SP, mode color</H1>
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<!-- received="Wed Sep 20 10:46:50 2000" -->
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<!-- name="Henning Meier-Geinitz" -->
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<!-- subject="Re: Problems with Mustek 1200 SP, mode color" -->
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<STRONG>From:</STRONG> Henning Meier-Geinitz (<A HREF="mailto:hmg-ml@gmx.de?Subject=Re:%20Problems%20with%20Mustek%201200%20SP,%20mode%20color&In-Reply-To=<20000920185200.A17614@hmg1.vortex.swb.de>"><EM>hmg-ml@gmx.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Wed Sep 20 2000 - 09:52:00 PDT
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0197.html">bob van der Poel: "xsane DOES NOT WORK"</A>
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<UL>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0195.html">Joseph R. + Martina Eoff: "Re: Good 2nd PCI SCSI Card?"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0187.html">Paul Aschenborn: "Problems with Mustek 1200 SP, mode color"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0203.html">Paul Aschenborn: "Re: Problems with Mustek 1200 SP, mode color. WITH debug.log"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0190.html">Oliver Schwartz: "Re: whereabouts of snapscan-usb.[c,h]"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0203.html">Paul Aschenborn: "Re: Problems with Mustek 1200 SP, mode color. WITH debug.log"</A>
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<HR NOSHADE><P>
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<P>
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Hi,
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<BR>
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<P>On Tue, Sep 19, 2000 at 11:53:16PM +0200, Paul Aschenborn wrote:
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<BR>
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<EM>> The scanner has a physical resolution of 1200 dpi, color.
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</EM><BR>
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<P>600x1200 dpi to be exact.
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<BR>
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<P><EM>> Black/white and gray
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</EM><BR>
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<EM>> scanned images work perfect, I have no trouble at all, but when I switch to
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</EM><BR>
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<EM>> color scan, I have some fancy effect I can not use at all.
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</EM><BR>
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<EM>> First of all the color dont match with the real ones. The are totally shifted
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</EM><BR>
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<EM>> into
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</EM><BR>
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<EM>> blue, green or red. Well not just shifted, that I could correct ...
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</EM><BR>
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<EM>> The most remarkeable thing about it is, that it is reproduceable and the
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</EM><BR>
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<EM>> type of the wrong color depends on the used resolution. So scanning at
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</EM><BR>
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<EM>> 120 dpi ist a blue like image without any red scanning with 125 dpi becomes
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</EM><BR>
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<EM>> more and more green ...
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</EM><BR>
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<P>That's the "standard" line-distance correction problem. Could you please send a
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<BR>
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debug log to me, I need to know the firmware version and some further
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<BR>
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details of your scanner.
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<BR>
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<P>SANE_DEBUG_MUSTEK=5 scanimage -L 2>debug.log
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<BR>
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<P>Thank you.
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<BR>
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<P><EM>> Additionally I get some "bad lines" in the pictures, they repeat in a constant
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</EM><BR>
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<EM>> frequent all over the image. If the image is dark, those lines (1-3 pixel
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</EM><BR>
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<EM>> broad)
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</EM><BR>
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<EM>> are bright and visa versa.
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</EM><BR>
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<P>These are at the place where the scanner starts a new block ob data. If you
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<BR>
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change the buffersize (option buffersize in mustek.conf) the distance
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<BR>
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between these lines should change, too.
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<BR>
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<P><EM>> Since there are no options in the mustek.conf I tried out so change almost
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</EM><BR>
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<EM>> everything
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</EM><BR>
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<EM>> I can.
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</EM><BR>
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<P>In mustek.conf, option linedistance-fix should be removed or commented out
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<BR>
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if it's there.
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<BR>
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<P>The problem is probabaly easy to solve in mustek.c when I know the firmware
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<BR>
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version. I had one more report about a similar problem since SANE 1.0.3.
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<BR>
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<P><EM>> The problem is the same with different types of images, different
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</EM><BR>
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<EM>> kernels (2.2.14 - 2.2.17)
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</EM><BR>
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<EM>> and I even plugged a Adaptec 2490 in. All the same error.
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</EM><BR>
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<P>The error results from different methods to compensate fort the line shift
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<BR>
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of the three color CCD lines. Some scanners do this line-distance correction
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<BR>
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internally, for some this must be done in the backend. So the backend must
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<BR>
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know for which firmware version it should do the correction and for which
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<BR>
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it's not necessary.
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<BR>
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<P><EM>> Then I realized, that the scanner is recognized as Mustek 12000 SP and not as
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</EM><BR>
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<EM>> 1200 SP.
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</EM><BR>
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<EM>> As far as I know the only difference are some cheaper mechanical parts in the
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</EM><BR>
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<EM>> 12000, so I
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</EM><BR>
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<EM>> dont know if there is something wrong.
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</EM><BR>
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<P>No, that's OK. They are identical. Mustek's scanner names are quite "funny".
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<BR>
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I have two 1200 SPs, both are labeled MFS-12000SP on the back. One is labeled
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<BR>
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"MFS-12000SP" on the front, the other one is a "1200 SP" (without MFS). If
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<BR>
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you ask the firmware for their name, it's "MSF-12000SP" (not MFS!). Ah and
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<BR>
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yes, a Paragon 1200 SP III would be a total different scanner despite its
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<BR>
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name.
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<BR>
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<P><EM>> At last I got another question: I configured saned to scan via network (this
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</EM><BR>
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<EM>> does not affect the
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</EM><BR>
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<EM>> problem above in anything - it occurs when scanning on local device and over
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</EM><BR>
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<EM>> net ...)
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</EM><BR>
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<EM>> Now I did some "scanimage -dnet:computer:mustek:/dev/scanner ..." which worked
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</EM><BR>
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<EM>> fine.
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</EM><BR>
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<EM>> But scanning with the X-frontends like xsane, xscanimage refused with the
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</EM><BR>
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<EM>> message
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</EM><BR>
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<EM>> "no device found".
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</EM><BR>
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<EM>> How can I teach them to use the network - scanner ??
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</EM><BR>
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<P>Check if "net" is in dll.conf. You can add the name of the backend+device to
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<BR>
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xsane/xscanimage:
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<BR>
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<P>xsane mustek:/dev/scanner
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<BR>
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<P>Does this work?
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<BR>
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<P>The Mustek backend homepage is at <A HREF="http://hmg.home.pages.de/sane/">http://hmg.home.pages.de/sane/</A> . You may
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<BR>
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find some tips about the Mustek backend there.
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<BR>
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<P>Bye,
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<BR>
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Henning
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<BR>
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<P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Problems%20with%20Mustek%201200%20SP,%20mode%20color&In-Reply-To=<20000920185200.A17614@hmg1.vortex.swb.de>">majordomo@mostang.com</A>
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</PRE>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0197.html">bob van der Poel: "xsane DOES NOT WORK"</A>
|
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<LI><STRONG>Previous message:</STRONG> <A HREF="0195.html">Joseph R. + Martina Eoff: "Re: Good 2nd PCI SCSI Card?"</A>
|
|
<LI><STRONG>In reply to:</STRONG> <A HREF="0187.html">Paul Aschenborn: "Problems with Mustek 1200 SP, mode color"</A>
|
|
<!-- nextthread="start" -->
|
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0203.html">Paul Aschenborn: "Re: Problems with Mustek 1200 SP, mode color. WITH debug.log"</A>
|
|
<LI><STRONG>Next in thread:</STRONG> <A HREF="0190.html">Oliver Schwartz: "Re: whereabouts of snapscan-usb.[c,h]"</A>
|
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<LI><STRONG>Reply:</STRONG> <A HREF="0203.html">Paul Aschenborn: "Re: Problems with Mustek 1200 SP, mode color. WITH debug.log"</A>
|
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<SMALL>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Wed Sep 20 2000 - 10:47:21 PDT</EM>
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