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70 wiersze
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<!-- received="Wed Jul 22 22:29:59 1998 PDT" -->
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<!-- sent="Wed, 22 Jul 1998 22:29:56 -0700" -->
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<!-- name="David Mosberger-Tang" -->
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<!-- email="David.Mosberger@acm.org" -->
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<!-- subject="Re: [PATCH] Fix re: Mustek Scan Express 12000SP Problems" -->
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<!-- id="199807230529.WAA11118@panda.mostang.com" -->
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<!-- inreplyto="199805312042.WAA20426@public.uni-hamburg.de" -->
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<title>sane-devel: Re: [PATCH] Fix re: Mustek Scan Express 12000SP Problems</title>
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<h1>Re: [PATCH] Fix re: Mustek Scan Express 12000SP Problems</h1>
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<b>David Mosberger-Tang</b> (<a href="mailto:David.Mosberger@acm.org"><i>David.Mosberger@acm.org</i></a>)<br>
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<i>Wed, 22 Jul 1998 22:29:56 -0700</i>
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<p>
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<ul>
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<li> <b>Next message:</b> <a href="0136.html">David Mosberger-Tang: "Re: Installing SANE on DU machines"</a>
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<li> <b>Previous message:</b> <a href="0134.html">Wolfgang Kaess: "Parallel port OS/2 support"</a>
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<i>>>>>> On Sun, 31 May 1998 22:46:57 +0200 (MET DST), "Daniel Deckers" <<a href="mailto:fh5y076@public.uni-hamburg.de">fh5y076@public.uni-hamburg.de</a>> said:</i><br>
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<p>
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Daniel> Ole Gerden wrote:<br>
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<i> >> I have got a Mustek Scanexpress 12000SP and have another problem:</i><br>
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<i> >> Scanning in gray- and colourmode only works correct in low</i><br>
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<i> >> resolution or if the scanwidth is reduced. In other modes the</i><br>
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<i> >> result contains some horizontal stripes in irregular</i><br>
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<i> >> distances. It seems so that the imagedata in these stripes is</i><br>
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<i> >> shifted to the left or right. In these memory-hungry modes the</i><br>
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<i> >> scanner also sometimes pauses while scanning (undependant of</i><br>
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<i> >> strip-height). But I do not know if this normal.</i><br>
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<p>
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Daniel> I have been experiencing the same problem with a Mustek<br>
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Daniel> MFS-12000SP (firmware v1.02) and found this was caused by<br>
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Daniel> sending the gamma correction values to the scanner<br>
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Daniel> twice. The following patch completely cured this problem for<br>
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Daniel> me (it also removes two superfluous lines of code):<br>
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<p>
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Daniel> [snip]<br>
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<p>
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Daniel> Could people with other Mustek scanners please check if this<br>
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Daniel> patch has any adverse effects for them?<br>
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<p>
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Daniel> Hope this helps (without triggering new problems :-/), Dan<br>
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<p>
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Unfortunately, some Mustek scanners require the gamma table to be sent<br>
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before the start_scan() call, while others need it afterwards. If the<br>
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MFS-12000SP can't tolerate the the gamma table before start_scan(),<br>
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then we should omit it only for those versions that don't tolerate it.<br>
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Do you know whether the gamma problems exist with firmware version<br>
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v1.02 only or whether it exists for all MFS-12000SP versions?<br>
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<p>
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--david<br>
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<p>
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<pre>
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--
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</pre>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0136.html">David Mosberger-Tang: "Re: Installing SANE on DU machines"</a>
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<li> <b>Previous message:</b> <a href="0134.html">Wolfgang Kaess: "Parallel port OS/2 support"</a>
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