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<TITLE>sane-devel: Re: SnapScan</TITLE>
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<META NAME="Author" CONTENT="Oliver Schwartz (Oliver.Schwartz@gmx.de)">
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<META NAME="Subject" CONTENT="Re: SnapScan">
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<H1>Re: SnapScan</H1>
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<!-- received="Thu May 4 09:27:50 2000" -->
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<!-- name="Oliver Schwartz" -->
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<!-- subject="Re: SnapScan" -->
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<STRONG>From:</STRONG> Oliver Schwartz (<A HREF="mailto:Oliver.Schwartz@gmx.de?Subject=Re:%20SnapScan&In-Reply-To=<00050418391400.00383@oliverspc>"><EM>Oliver.Schwartz@gmx.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Thu May 04 2000 - 09:18:01 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0037.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0035.html">Steffen Kluge: "Re: Acer Prisa620ST woes and hope"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0033.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0037.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0007.html">Petter Reinholdtsen: "Re: SnapScan"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0037.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0038.html">Karl Heinz Kremer: "Re: SnapScan"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0042.html">Steve Underwood: "Re: SnapScan"</A>
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<HR NOSHADE><P>
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<P>
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<EM>> > I have an Acer ScanPrisa 620 UT. It works, but the RGB offsets are noticeable.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Maybe the overhead (transparency unit) lamp *needs* special
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</EM><BR>
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<EM>> calibration? The manual for the Prisa 620ST states that when
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</EM><BR>
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<EM>> scanning slides or negs you must use the supplied mask and you
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</EM><BR>
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<EM>> must leave the calibration window in this mask unobstructed.
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</EM><BR>
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<P>Yes, that's correct. And of course I'm using the mask in transparency mode. I
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<BR>
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have the impression that the calibration is done by the firmware - at least the
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<BR>
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trays move to the calibration area before each scan.
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<BR>
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<P>The offsets appear in flatbed and transparency mode, though.
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<BR>
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<P>However, the RGB offsets as I understand them are not an offset in value but a
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<BR>
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spatial offset. E. g. if you scan a black square on white background in
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<BR>
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color mode it doesn't have sharp edges but maybe a blue edge on one side and an
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<BR>
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orange edge on the other. Just try it.
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<BR>
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<P>Oliver
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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:%20SnapScan&In-Reply-To=<00050418391400.00383@oliverspc>">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="0037.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0035.html">Steffen Kluge: "Re: Acer Prisa620ST woes and hope"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0033.html">Steffen Kluge: "Re: SnapScan"</A>
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<!-- nextthread="start" -->
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0037.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0007.html">Petter Reinholdtsen: "Re: SnapScan"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0037.html">Steffen Kluge: "Re: SnapScan"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0038.html">Karl Heinz Kremer: "Re: SnapScan"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0042.html">Steve Underwood: "Re: SnapScan"</A>
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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>Thu May 04 2000 - 09:30:49 PDT</EM>
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