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<!-- received="Sun May 31 13:43:33 1998 PDT" -->
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<!-- sent="Sun, 31 May 1998 22:46:57 +0200 (MET DST)" -->
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<!-- name="Daniel Deckers" -->
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<!-- email="fh5y076@public.uni-hamburg.de" -->
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<!-- subject="[PATCH] Fix re: Mustek Scan Express 12000SP Problems" -->
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<!-- id="199805312042.WAA20426@public.uni-hamburg.de" -->
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<!-- inreplyto="Mustek Scan Express 12000SP Problems" -->
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<title>sane-devel: [PATCH] Fix re: Mustek Scan Express 12000SP Problems</title>
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<h1>[PATCH] Fix re: Mustek Scan Express 12000SP Problems</h1>
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<b>Daniel Deckers</b> (<a href="mailto:fh5y076@public.uni-hamburg.de"><i>fh5y076@public.uni-hamburg.de</i></a>)<br>
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<i>Sun, 31 May 1998 22:46:57 +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#306">[ date ]</a><a href="index.html#306">[ thread ]</a><a href="subject.html#306">[ subject ]</a><a href="author.html#306">[ author ]</a>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0307.html">Thomas S Dorr: "RE: xscanimage and the gimp"</a>
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<li> <b>Previous message:</b> <a href="0305.html">Hugo van der Kooij: "Re: sane & umac-astra 610s"</a>
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<li> <b>Maybe in reply to:</b> <a href="0293.html">Ole Gerden: "Mustek Scan Express 12000SP Problems"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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Ole Gerden wrote:<br>
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<p>
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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 resolution or</i><br>
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<i>>if the scanwidth is reduced. In other modes the result contains</i><br>
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<i>>some horizontal stripes in irregular distances. It seems so that the</i><br>
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<i>>imagedata in these stripes is shifted to the left or right. In these</i><br>
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<i>>memory-hungry modes the scanner also sometimes pauses while scanning</i><br>
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<i>>(undependant of strip-height). But I do not know if this normal.</i><br>
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<p>
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I have been experiencing the same problem with a Mustek MFS-12000SP<br>
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(firmware v1.02) and found this was caused by sending the gamma correction<br>
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values to the scanner twice. The following patch completely cured this<br>
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problem for me (it also removes two superfluous lines of code):<br>
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<p>
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<i>>>>>>>>></i><br>
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--- sane-0.73/backend/mustek.c Sat May 16 08:23:51 1998<br>
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+++ sane-0.73/backend/mustek.c Sun May 31 22:18:00 1998<br>
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@@ -2703,18 +2703,11 @@<br>
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<br>
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s->scanning = SANE_TRUE;<br>
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<br>
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- status = send_gamma_table (s);<br>
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- if (status != SANE_STATUS_GOOD)<br>
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- goto stop_scanner_and_return;<br>
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-<br>
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status = start_scan (s);<br>
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if (status != SANE_STATUS_GOOD)<br>
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goto stop_scanner_and_return;<br>
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<br>
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status = send_gamma_table (s);<br>
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- if (status != SANE_STATUS_GOOD)<br>
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- goto stop_scanner_and_return;<br>
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-<br>
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if (status != SANE_STATUS_GOOD)<br>
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goto stop_scanner_and_return;<br>
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<br>
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<i>>>>>>>>></i><br>
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<p>
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NB. The scanner works fine unless "option linedistance-fix" is set; so try<br>
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without this option first. Please report back whether this patch works for<br>
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your Scanexpress (which firmware version?).<br>
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<p>
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Could people with other Mustek scanners please check if this patch has any<br>
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adverse effects for them?<br>
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<p>
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Hope this helps (without triggering new problems :-/),<br>
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Dan<br>
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<p>
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<pre>
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--
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<a href="mailto:Daniel_Deckers@public.uni-hamburg.de">Daniel_Deckers@public.uni-hamburg.de</a>
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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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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</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="0307.html">Thomas S Dorr: "RE: xscanimage and the gimp"</a>
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<li> <b>Previous message:</b> <a href="0305.html">Hugo van der Kooij: "Re: sane & umac-astra 610s"</a>
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<li> <b>Maybe in reply to:</b> <a href="0293.html">Ole Gerden: "Mustek Scan Express 12000SP Problems"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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