sane-project-website/old-archive/1997-10/0130.html

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<!-- name="Rogier Wolff" -->
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<!-- subject="Re: Dark scans with HP ScanJet 3c" -->
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<title>sane-devel: Re: Dark scans with HP ScanJet 3c</title>
<h1>Re: Dark scans with HP ScanJet 3c</h1>
<b>Rogier Wolff</b> (<a href="mailto:R.E.Wolff@BitWizard.nl"><i>R.E.Wolff@BitWizard.nl</i></a>)<br>
<i>Sat, 25 Oct 1997 08:39:30 +0200 (MET DST)</i>
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David Mosberger-Tang wrote:<br>
<i>&gt; </i><br>
<i>&gt; &gt;&gt;&gt;&gt;&gt; On Thu, 23 Oct 1997 22:57:29 +0200, Joerg Diederich &lt;<a href="mailto:J_Diederich@herlab.ruhr.de">J_Diederich@herlab.ruhr.de</a>&gt; said:</i><br>
<i>&gt; </i><br>
<i>&gt; Joerg&gt; Hi Everyone,</i><br>
<i>&gt; </i><br>
<i>&gt; Joerg&gt; excuse me, if this is a RTFM question.</i><br>
<i>&gt; </i><br>
<i>&gt; Joerg&gt; I'm using sane 0.65 together with a HP ScanJet 3c (over a</i><br>
<i>&gt; Joerg&gt; local area network, but that's probably not relevant for my</i><br>
<i>&gt; Joerg&gt; problem).</i><br>
<i>&gt; </i><br>
<i>&gt; Joerg&gt; Everything works fine, but true color scans created by sane</i><br>
<i>&gt; Joerg&gt; are - compared to results produced by the original HP</i><br>
<i>&gt; Joerg&gt; software under windoze - very dark.</i><br>
<i>&gt; </i><br>
<i>&gt; Joerg&gt; Are there any suggestions for proper values of contrast and</i><br>
<i>&gt; Joerg&gt; brightness? Or is it possible to calibrate sane?</i><br>
<i>&gt; </i><br>
<i>&gt; The HP backend is still very minimal. It was derived from hpscanpbm</i><br>
<i>&gt; and was adapted to SANE "in the blind" (without access to an HP</i><br>
<i>&gt; scanner). Features such as gamma correction are not supported yet.</i><br>
<i>&gt; Getting the docs from HP isn't hard, but what's lacking right now is a</i><br>
<i>&gt; person to take the HP backend under his or her wing...</i><br>
<p>
Joerg, <br>
<p>
If you're not going to take the hint from David, you can adjust the<br>
gamma using a program like "xv". Load the picture in XV, and press "e"<br>
to edit the colors. In the middle-bottom control you can adjust the<br>
gamma. Works like a charm. <br>
<p>
Roger. <br>
<p>
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<li> <b>Next message:</b> <a href="0131.html">David Mosberger-Tang: "forwarded message from Federico Mena"</a>
<li> <b>Previous message:</b> <a href="0129.html">Matto Marjanovic: "next release of Microtek back-end: come and get it"</a>
<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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