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<!-- received="Sat Aug 30 03:39:01 1997 MST" -->
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<!-- sent="Sat, 30 Aug 1997 11:44:00 +0200 (CEST)" -->
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<!-- name="Michael Ritzert" -->
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<!-- email="Ritzert@t-online.de" -->
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<!-- subject="Re: Backtracking in color scanning" -->
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<!-- id="199708300730.JAA01016@cave.BitWizard.nl" -->
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<!-- inreplyto="9708291813.AA19446@gypsy.atlantic.infi.net" -->
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<title>sane-devel: Re: Backtracking in color scanning</title>
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<h1>Re: Backtracking in color scanning</h1>
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<b>Michael Ritzert</b> (<a href="mailto:Ritzert@t-online.de"><i>Ritzert@t-online.de</i></a>)<br>
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<i>Sat, 30 Aug 1997 11:44:00 +0200 (CEST)</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#107">[ date ]</a><a href="index.html#107">[ thread ]</a><a href="subject.html#107">[ subject ]</a><a href="author.html#107">[ author ]</a>
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<li> <b>Next message:</b> <a href="0108.html">Oliver.Rauch@Wolfsburg.DE: "umax-backend"</a>
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<li> <b>Previous message:</b> <a href="0106.html">Rogier Wolff: "Re: Backtracking in color scanning"</a>
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<li> <b>In reply to:</b> <a href="0105.html">Rainer Krienke: "Re: Backtracking in color scanning"</a>
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<li> <b>Next in thread:</b> <a href="0116.html">Wolfgang Jung: "Re: Backtracking in color scanning"</a>
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</ul>
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<!-- body="start" -->
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Hallo shendrix!<br>
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<p>
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On 29-Aug-97 <a href="mailto:shendrix@gypsy.atlantic.infi.net">shendrix@gypsy.atlantic.infi.net</a> wrote:<br>
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<p>
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<i>>> If increasing the scan buffer size to 127.5KB doesn't help, the</i><br>
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<i>>> backtracking could be due to timing problems. If the scanner software</i><br>
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<i>>> is too slow to issue the next "read data" command then backtracking</i><br>
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<i>>> would occur. What kind of computer are you using and how much memory</i><br>
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<i>>> does it have?</i><br>
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<i>></i><br>
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<i>>Since I'm having the same problem, I'll reply here.</i><br>
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<p>
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Well, I also have this problem, so I join this thread, too.<br>
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<p>
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<i>>I have a Pentium 200 with 96mb RAM and the scanner is on its own Adaptec</i><br>
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<i>>1540 controller. The buffer is 128K and my scanning is very slow and does</i><br>
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<i>>the backtracking. Turning backtrack has no substantial speedup and the</i><br>
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<i>>colors are completely screwed up.</i><br>
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<p>
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The color problem might be solved by compiling with --disable-ld-fix.<br>
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<p>
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I have the Mustek MFS-12000SP. It's connected to an Adaptec AHA 1542CF as the<br>
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only device. The harddisks are connected to an AHA 2940UW. The computer is an<br>
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PPro 200, 64MB RAM. Buffer size is 127.5 kB. Sane version 0.62.<br>
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<p>
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<i>>Grayscale is great, and fast. Color under Windows is fast too. Of </i><br>
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<i>>course, now I cannot use it under Windows because the TWAIN driver </i><br>
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<i>>won't support my Adaptec.</i><br>
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<p>
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It actually does. I only had to load ASPI4DOS.??? in my config.sys and<br>
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reinstall the TWAIN driver and it worked fine. It only brought the processor<br>
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to near 100% load under Win95...<br>
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If it doesn't work with your version of the TWAIN driver or if you don't<br>
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have ASPI4DOS, feel free to contact me for more information.<br>
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<p>
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Ciao, Michael<br>
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<pre>
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---
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_
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|\/|_) -=> <a href="mailto:Ritzert@T-Online.de">Ritzert@T-Online.de</a> <=-
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| | \ *Michael Ritzert* - <a href="http://home.t-online.de/home/ritzert">http://home.t-online.de/home/ritzert</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.azstarnet.com/~axplinux/sane/">http://www.azstarnet.com/~axplinux/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="0108.html">Oliver.Rauch@Wolfsburg.DE: "umax-backend"</a>
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<li> <b>Previous message:</b> <a href="0106.html">Rogier Wolff: "Re: Backtracking in color scanning"</a>
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<li> <b>In reply to:</b> <a href="0105.html">Rainer Krienke: "Re: Backtracking in color scanning"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0116.html">Wolfgang Jung: "Re: Backtracking in color scanning"</a>
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<!-- reply="end" -->
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</ul>
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