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71 wiersze
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<!-- received="Sat Mar 13 20:02:33 1999 PST" -->
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<!-- sent="Sun, 14 Mar 1999 04:03:10 +0000 (GMT)" -->
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<!-- name="Nick Lamb" -->
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<!-- email="njl98r@ecs.soton.ac.uk" -->
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<!-- subject="HP ScanJet IIc ADF report" -->
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<title>sane-devel: HP ScanJet IIc ADF report</title>
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<h1>HP ScanJet IIc ADF report</h1>
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<b>Nick Lamb</b> (<a href="mailto:njl98r@ecs.soton.ac.uk"><i>njl98r@ecs.soton.ac.uk</i></a>)<br>
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<i>Sun, 14 Mar 1999 04:03:10 +0000 (GMT)</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#131">[ date ]</a><a href="index.html#131">[ thread ]</a><a href="subject.html#131">[ subject ]</a><a href="author.html#131">[ author ]</a>
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<li> <b>Next message:</b> <a href="0132.html">Bernd Schroeder: "Re: microtek2 driver"</a>
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<li> <b>Previous message:</b> <a href="0130.html">Kaz Sasayama: "Re: Epson backend"</a>
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<li> <b>Next in thread:</b> <a href="0148.html">Peter Kirchgessner: "Re: HP ScanJet IIc ADF report"</a>
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<li> <b>Reply:</b> <a href="0148.html">Peter Kirchgessner: "Re: HP ScanJet IIc ADF report"</a>
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</ul>
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Well, I've finally got access to an HP scanner, so that my ramblings on<br>
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this list are supported by more than the PNM backend and a desire to learn.<br>
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<p>
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The scanner is an ancient HP ScanJet IIc with an ADF, and it is connected<br>
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to a Pentium 90 with a DPT SCSI card of the same vintage as the scanner.<br>
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The Pentium 90 usually runs Windows 95, but I've installed a Linux 2.2.2<br>
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kernel with 64Kb SG_BIG_BUF and I'm talking to it mostly via saned & net.<br>
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<p>
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Discoveries so far<br>
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<p>
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(1) Although the frontends report a resolution up to 1600 dpi the scanner<br>
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really only offers up to 800 dpi real (optical?) resolution.<br>
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<p>
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(2) 800 dpi is a lot of bandwidth. The scanner backtracks in all modes<br>
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but B&W if the resolution and scan width exceed certain values.<br>
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<p>
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(3) Even when backtracking, Linux + SANE is faster than Win95. A decent<br>
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high resolution colour scan takes half as long in Linux as Win95.<br>
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<p>
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(4) The network doesn't slow down scanning (perhaps it even speeds it up<br>
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since the hard disk is on the same SCSI controller as the scanner)<br>
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<p>
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(5) Playing with the load next/ eject etc. stuff in xscanimage causes it<br>
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to crash. The remote saned seems fine, so presumably this is a network<br>
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backend or xscanimage bug. I had trouble tracking this down further.<br>
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<p>
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I also found (and reported) an Xsane memory allocation bug.<br>
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<p>
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Nick.<br>
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<p>
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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="0132.html">Bernd Schroeder: "Re: microtek2 driver"</a>
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<li> <b>Previous message:</b> <a href="0130.html">Kaz Sasayama: "Re: Epson backend"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0148.html">Peter Kirchgessner: "Re: HP ScanJet IIc ADF report"</a>
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<li> <b>Reply:</b> <a href="0148.html">Peter Kirchgessner: "Re: HP ScanJet IIc ADF report"</a>
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<!-- reply="end" -->
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</ul>
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