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71 wiersze
2.9 KiB
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<!-- received="Sun Feb 28 23:31:37 1999 PST" -->
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<!-- sent="Mon, 01 Mar 1999 08:29:59 +0100" -->
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<!-- name="Wolfgang Goeller" -->
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<!-- email="wgoeller@active.ch" -->
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<!-- subject="Re: Acer 310s" -->
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<title>sane-devel: Re: Acer 310s</title>
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<h1>Re: Acer 310s</h1>
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<b>Wolfgang Goeller</b> (<a href="mailto:wgoeller@active.ch"><i>wgoeller@active.ch</i></a>)<br>
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<i>Mon, 01 Mar 1999 08:29:59 +0100</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#257">[ date ]</a><a href="index.html#257">[ thread ]</a><a href="subject.html#257">[ subject ]</a><a href="author.html#257">[ author ]</a>
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<li> <b>Previous message:</b> <a href="0256.html">Rick Knight: "Re: Acer 310s"</a>
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<li> <b>Maybe in reply to:</b> <a href="0247.html">Rick Knight: "Acer 310s"</a>
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</ul>
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Rick Knight wrote:<br>
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<i>> </i><br>
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<i>> Found one of the problems. I found snapscan patch 5.0-6, applied it</i><br>
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<p>
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Well, I assumed all the time, that you would use this version - since<br>
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only this version contains the patches for the recoginition of the<br>
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ACER / VUEGO.<br>
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<p>
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<i>> and rebuilt. Now xscanimage and scanimage do see the scanner but the</i><br>
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<i>> image isn't usable. The top edge starts out ok but then the image goes</i><br>
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<i>> black or is so smeared it looks like a jumble of color. </i><br>
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<p>
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That's exactly what I've discovered: Since the top edge is okay, their<br>
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must be a wide similarity. But it's not a jumble of colours. If you<br>
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start with a small b/w stippled pattern or some black lines you will<br>
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see, that the forms are "raytraced". <br>
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<p>
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<i>> Any idea where to start with the snapscan module?</i><br>
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<p>
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Look at the SCSI-Module: Are expected bytes and got bytes identical?<br>
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If so: Use a simple pattern and control, from when on the pattern is<br>
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not correct. That might give you the amount of correct data.<br>
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Then start debugging, why the data gets corrupted.<br>
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Is it in the beginning of a line?<br>
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Are lines (partly) missing.<br>
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Simple test: Use a little white square on black background and a <br>
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little black square on white background. Scan the squares with<br>
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a little frame. Best: use the edges and give the values vor<br>
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length and width not via prescan and xscanimage but with exact<br>
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numbers using scanimage. Thus you can better count the amount<br>
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of bytes.<br>
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<p>
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Regards<br>
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Wolfgang<br>
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<p>
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<pre>
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--
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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>Previous message:</b> <a href="0256.html">Rick Knight: "Re: Acer 310s"</a>
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<li> <b>Maybe in reply to:</b> <a href="0247.html">Rick Knight: "Acer 310s"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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