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<!-- received="Sat Oct 25 03:58:58 1997 MST" -->
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<!-- sent="Sat, 25 Oct 1997 08:39:30 +0200 (MET DST)" -->
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<!-- name="Rogier Wolff" -->
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<!-- email="R.E.Wolff@BitWizard.nl" -->
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<!-- subject="Re: Dark scans with HP ScanJet 3c" -->
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<!-- id="199710250639.IAA00656@cave.BitWizard.nl" -->
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<!-- inreplyto="199710240347.UAA11848@panda.mostang.com" -->
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<title>sane-devel: Re: Dark scans with HP ScanJet 3c</title>
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<h1>Re: Dark scans with HP ScanJet 3c</h1>
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<b>Rogier Wolff</b> (<a href="mailto:R.E.Wolff@BitWizard.nl"><i>R.E.Wolff@BitWizard.nl</i></a>)<br>
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<i>Sat, 25 Oct 1997 08:39:30 +0200 (MET DST)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#130">[ date ]</a><a href="index.html#130">[ thread ]</a><a href="subject.html#130">[ subject ]</a><a href="author.html#130">[ author ]</a>
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<li> <b>Next message:</b> <a href="0131.html">David Mosberger-Tang: "forwarded message from Federico Mena"</a>
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<li> <b>Previous message:</b> <a href="0129.html">Matto Marjanovic: "next release of Microtek back-end: come and get it"</a>
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<li> <b>In reply to:</b> <a href="0125.html">David Mosberger-Tang: "Re: Dark scans with HP ScanJet 3c"</a>
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</ul>
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<!-- body="start" -->
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David Mosberger-Tang wrote:<br>
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<i>> </i><br>
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<i>> >>>>> On Thu, 23 Oct 1997 22:57:29 +0200, Joerg Diederich <<a href="mailto:J_Diederich@herlab.ruhr.de">J_Diederich@herlab.ruhr.de</a>> said:</i><br>
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<i>> </i><br>
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<i>> Joerg> Hi Everyone,</i><br>
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<i>> </i><br>
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<i>> Joerg> excuse me, if this is a RTFM question.</i><br>
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<i>> </i><br>
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<i>> Joerg> I'm using sane 0.65 together with a HP ScanJet 3c (over a</i><br>
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<i>> Joerg> local area network, but that's probably not relevant for my</i><br>
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<i>> Joerg> problem).</i><br>
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<i>> </i><br>
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<i>> Joerg> Everything works fine, but true color scans created by sane</i><br>
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<i>> Joerg> are - compared to results produced by the original HP</i><br>
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<i>> Joerg> software under windoze - very dark.</i><br>
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<i>> </i><br>
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<i>> Joerg> Are there any suggestions for proper values of contrast and</i><br>
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<i>> Joerg> brightness? Or is it possible to calibrate sane?</i><br>
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<i>> </i><br>
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<i>> The HP backend is still very minimal. It was derived from hpscanpbm</i><br>
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<i>> and was adapted to SANE "in the blind" (without access to an HP</i><br>
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<i>> scanner). Features such as gamma correction are not supported yet.</i><br>
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<i>> Getting the docs from HP isn't hard, but what's lacking right now is a</i><br>
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<i>> person to take the HP backend under his or her wing...</i><br>
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<p>
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Joerg, <br>
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<p>
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If you're not going to take the hint from David, you can adjust the<br>
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gamma using a program like "xv". Load the picture in XV, and press "e"<br>
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to edit the colors. In the middle-bottom control you can adjust the<br>
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gamma. Works like a charm. <br>
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<p>
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Roger. <br>
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<p>
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<pre>
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--
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** <a href="mailto:R.E.Wolff@BitWizard.nl">R.E.Wolff@BitWizard.nl</a> ** +31-15-2137555 ** <a href="http://www.BitWizard.nl/">http://www.BitWizard.nl/</a> **
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Florida -- A 39 year old construction worker woke up this morning when a
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109-car freight train drove over him. According to the police the man was
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drunk. The man himself claims he slipped while walking the dog. 080897
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<p>
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<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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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0131.html">David Mosberger-Tang: "forwarded message from Federico Mena"</a>
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<li> <b>Previous message:</b> <a href="0129.html">Matto Marjanovic: "next release of Microtek back-end: come and get it"</a>
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<li> <b>In reply to:</b> <a href="0125.html">David Mosberger-Tang: "Re: Dark scans with HP ScanJet 3c"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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