kopia lustrzana https://gitlab.com/sane-project/website
67 wiersze
2.9 KiB
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67 wiersze
2.9 KiB
HTML
<!-- received="Thu Dec 31 12:23:20 1998 PST" -->
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<!-- sent="Thu, 31 Dec 1998 20:16:53 GMT" -->
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<!-- name="D C Haslam" -->
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<!-- email="dch@sirius.demon.co.uk" -->
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<!-- subject="Short pnm files" -->
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<!-- id="199812312016.UAA00103@woody.noname.non" -->
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<title>sane-devel: Short pnm files</title>
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<h1>Short pnm files</h1>
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<b>D C Haslam</b> (<a href="mailto:dch@sirius.demon.co.uk"><i>dch@sirius.demon.co.uk</i></a>)<br>
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<i>Thu, 31 Dec 1998 20:16:53 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#331">[ date ]</a><a href="index.html#331">[ thread ]</a><a href="subject.html#331">[ subject ]</a><a href="author.html#331">[ author ]</a>
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<li> <b>Next message:</b> <a href="0332.html">Peter Kirchgessner: "Re: Forwards-Backwards"</a>
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<li> <b>Previous message:</b> <a href="0330.html">Robert Brink: "Re: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)"</a>
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</ul>
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I have a Umax 600S connected to an AV-1515, and in general<br>
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it seems to work ok with sane 1.0.<br>
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<p>
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However, sometimes the pnm file generated by scanimage or xscanimage<br>
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is invalid, the file is generally too short.<br>
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<p>
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Has anyone else seen this? I've been trying different settings, but<br>
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don't have anything conclusive yet. 300dpi (the max for this scanner)<br>
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seems ok, but lower resolutions seem to suffer. It is affected by the<br>
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area scanned.<br>
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<p>
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I ran scanimage with various debugging environment variables set, and<br>
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the debug output suggests that sane_read is not returning<br>
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all the data from the scanner as this extract suggests:<br>
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<p>
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[umax] merged line as color 0 to line 36<br>
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[umax] sane_read: read 4096 bytes<br>
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[umax] merged line as color 2 to line 39<br>
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[umax] merged line as color 0 to line 37<br>
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[umax] merged line as color 2 to line 40<br>
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[umax] sane_read: read 233 bytes<br>
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[umax] reader_process: buffer of 4563 bytes read; 0 bytes to go<br>
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[umax] sane_read: read 0 bytes<br>
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<p>
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(the full session log is over 500 lines, available on request :)<br>
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<p>
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I'll debug some more, but umax.c doesn't make a lot of sense to me<br>
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yet, not being familiar with the finer points of scanner interfacing.<br>
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<p>
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David Haslam<br>
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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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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0332.html">Peter Kirchgessner: "Re: Forwards-Backwards"</a>
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<li> <b>Previous message:</b> <a href="0330.html">Robert Brink: "Re: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)"</a>
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<!-- nextthread="start" -->
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</ul>
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