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70 wiersze
3.7 KiB
HTML
<!-- received="Fri Aug 29 11:57:08 1997 MST" -->
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<!-- sent="Fri, 29 Aug 97 14:13:36 -0400" -->
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<!-- name="shendrix@gypsy.atlantic.infi.net" -->
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<!-- email="shendrix@gypsy.atlantic.infi.net" -->
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<!-- subject="Re: Backtracking in color scanning" -->
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<!-- id="9708291813.AA19446@gypsy.atlantic.infi.net" -->
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<!-- inreplyto="199708291754.KAA02430@hopper.mosberger" -->
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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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<a href="mailto:shendrix@gypsy.atlantic.infi.net"><i>shendrix@gypsy.atlantic.infi.net</i></a><br>
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<i>Fri, 29 Aug 97 14:13:36 -0400</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#104">[ date ]</a><a href="index.html#104">[ thread ]</a><a href="subject.html#104">[ subject ]</a><a href="author.html#104">[ author ]</a>
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<li> <b>Next message:</b> <a href="0105.html">Rainer Krienke: "Re: Backtracking in color scanning"</a>
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<li> <b>Previous message:</b> <a href="0103.html">David Mosberger-Tang: "Re: Nikon LS-1000"</a>
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<li> <b>In reply to:</b> <a href="0102.html">David Mosberger-Tang: "Re: Backtracking in color scanning"</a>
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In message <199708291754.KAA02430@hopper.mosberger> <br>
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<a href="mailto:David.Mosberger@acm.org">David.Mosberger@acm.org</a> (> ) writes:<br>
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<p>
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<i>> >>>>> On Fri, 29 Aug 1997 17:04:01 +0200, Rainer krienke <<a href="mailto:krienke@mailhost.un">krienke@mailhost.un</a></i><br>
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<i>>i-koblenz.de> said:</i><br>
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<p>
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<i>> Rainer> What suprises me a lot, is that under windows doing the same</i><br>
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<i>> Rainer> scanprocess at the same resolution (via the mustec-twain</i><br>
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<i>> Rainer> driver) does not cause backtracking to occur and is</i><br>
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<i>> Rainer> completed much much faster (not even half the time).</i><br>
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<i>> </i><br>
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<i>> What size scan-buffer are you using? If you're using the default size</i><br>
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<i>> of 32KB, could you try increasing it to 127.5KB? See sane-scsi(5) for</i><br>
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<i>> info on how to do that.</i><br>
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<i>> </i><br>
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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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<p>
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Since I'm having the same problem, I'll reply here.<br>
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<p>
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I have a Pentium 200 with 96mb RAM and the scanner is on its own Adaptec<br>
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1540 controller. The buffer is 128K and my scanning is very slow and does<br>
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the backtracking. Turning backtrack has no substantial speedup and the<br>
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colors are completely screwed up.<br>
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<p>
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Grayscale is great, and fast. Color under Windows is fast too. Of <br>
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course, now I cannot use it under Windows because the TWAIN driver <br>
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won't support my Adaptec.<br>
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<p>
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<pre>
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--
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</pre>
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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="0105.html">Rainer Krienke: "Re: Backtracking in color scanning"</a>
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<li> <b>Previous message:</b> <a href="0103.html">David Mosberger-Tang: "Re: Nikon LS-1000"</a>
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<li> <b>In reply to:</b> <a href="0102.html">David Mosberger-Tang: "Re: Backtracking in color scanning"</a>
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<!-- nextthread="start" -->
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</ul>
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