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<!-- received="Mon Apr 5 08:38:39 1999 PDT" -->
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<!-- sent="Mon, 5 Apr 1999 17:38:44 +0200" -->
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<!-- name="Bernd Schroeder" -->
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<!-- email="bernd@aquila.muc.de" -->
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<!-- subject="Re: Green-ness of microtek scanned images" -->
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<!-- inreplyto="199904050618.XAA04210@celeste.ucolick.org" -->
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<title>sane-devel: Re: Green-ness of microtek scanned images</title>
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<h1>Re: Green-ness of microtek scanned images</h1>
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<b>Bernd Schroeder</b> (<a href="mailto:bernd@aquila.muc.de"><i>bernd@aquila.muc.de</i></a>)<br>
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<i>Mon, 5 Apr 1999 17:38:44 +0200</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#83">[ date ]</a><a href="index.html#83">[ thread ]</a><a href="subject.html#83">[ subject ]</a><a href="author.html#83">[ author ]</a>
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<li> <b>Next message:</b> <a href="0084.html">Oliver Rauch: "xsane-0.20 available"</a>
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<li> <b>Previous message:</b> <a href="0082.html">Andreas Dilger: "Re: 16 bit per sample support"</a>
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<li> <b>In reply to:</b> <a href="0073.html">De Clarke: "Green-ness of microtek scanned images"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0122.html">David Mosberger-Tang: "Re: Green-ness of microtek scanned images"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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On Sun, Apr 04, 1999 at 11:18:49PM -0800, De Clarke wrote:<br>
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<i>> </i><br>
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<i>> I just replaced microtek2.c and microtek2.h with those from the </i><br>
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<i>> Mar 31 tarball, since Bernd had recommended that to another user.</i><br>
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<i>> </i><br>
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<i>> It seems to behave about the same -- preview always very red/green,</i><br>
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<i>> with blue being replaced by red and everything else greenish --</i><br>
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<i>> in normal scans, neutral colours seem to be too red/greeny with</i><br>
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<i>> no blue in the mix, but blue areas seem ok.</i><br>
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<p>
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This is a patch against pre1.01-4. Can you tell us, whether this patch<br>
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works for you or not ? Maybe David can include the patch into the<br>
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1.01 release if it works.<br>
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<p>
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---------------------------cut here -----------------------------------<br>
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--- microtek2.c.orig Mon Apr 5 16:54:21 1999<br>
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+++ microtek2.c Mon Apr 5 17:16:32 1999<br>
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@@ -1843,11 +1843,15 @@<br>
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pad = (int) ceil( (double) (ms->ppl * bits_pp_in) / 8.0 ) % 2;<br>
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bpp = bits_pp_out / 8;<br>
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<br>
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- /* The ScanMaker 636 has 3 * ppl + 6 bytes per line and the X6EL */<br>
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- /* 3 * ppl + 2 bytes per line (depth=8, even number of pixels), which */<br>
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- /* can not be explained by the documentation; bpl_ppl_diff corrects this */<br>
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- if (mi->model_code == 0x91<br>
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- && (md->revision == 1.10 || md->revision == 1.20))<br>
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+ /* Some models have 3 * ppl + 6 bytes per line if the number of pixels */<br>
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+ /* per line is even and 3 * ppl + 3 bytes per line if the number of */<br>
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+ /* pixels per line is odd. According to the documentation it should be */<br>
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+ /* bpl = 3*ppl (even number of pixels) or bpl=3*ppl+1 (odd number of */ /* pixels. Even worse: On different models it different at which */ /* position in a scanline the image data starts. bpl_ppl_diff tries */ /* to fix this */ <br>
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+<br>
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+ if ( (mi->model_code == 0x91<br>
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+ && (md->revision == 1.10 || md->revision == 1.20))<br>
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+ || (mi->model_code == 0x98 && md->revision == 1.30 ) )<br>
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+ <br>
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bpl_ppl_diff = ms->bpl - ( 3 * ms->ppl * bpp );<br>
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else<br>
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bpl_ppl_diff = ms->bpl - ( 3 * ms->ppl * bpp ) - pad;<br>
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---------cut there ------------------------------------------------------<br>
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<p>
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<p>
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<i>> PS I think there was some discussion of this a month or two ago,</i><br>
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<i>> but I forget the answer: does the light ever turn off in this</i><br>
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<i>> scanner? it seems to stay on a long time even when idle ...</i><br>
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<p>
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Yes, this is normal.<br>
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<p>
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Bernd<br>
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<pre>
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--
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Bernd Schroeder
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Email: <a href="mailto:bernd@aquila.muc.de">mailto:bernd@aquila.muc.de</a>
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PGP public key available: <a href="mailto:pgp@aquila.muc.de">mailto:pgp@aquila.muc.de</a> | Subject: send key
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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="0084.html">Oliver Rauch: "xsane-0.20 available"</a>
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<li> <b>Previous message:</b> <a href="0082.html">Andreas Dilger: "Re: 16 bit per sample support"</a>
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<li> <b>In reply to:</b> <a href="0073.html">De Clarke: "Green-ness of microtek scanned images"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0122.html">David Mosberger-Tang: "Re: Green-ness of microtek scanned images"</a>
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<!-- reply="end" -->
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</ul>
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