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70 wiersze
3.6 KiB
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<!-- name="becka@sunserver1.rz.uni-duesseldorf.de" -->
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<!-- subject="Re: different x and y scan resolution (mustek) ?" -->
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<title>sane-devel: Re: different x and y scan resolution (mustek) ?</title>
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<h1>Re: different x and y scan resolution (mustek) ?</h1>
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<a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de"><i>becka@sunserver1.rz.uni-duesseldorf.de</i></a><br>
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<i>Sun, 20 Jul 1997 18:46:12 +0200 (MET DST)</i>
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<p>
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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">Kolja Waschk: "More on Mustek 8000SP adventures..."</a>
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<li> <b>Previous message:</b> <a href="0103.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: More on Mustek 8000SP adventures..."</a>
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<i>> Is there any way to tell a mustek (MFS-12000SP) scanner to use different</i><br>
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<i>> resolutions for x and y direction ? </i><br>
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I haven't got the mustek docs handy yet (got to search for them ... they are <br>
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somewhere lost in drive-space), but from the sane-source I believe this is <br>
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not possible (only a single value is set).<br>
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<p>
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<i>> I want to use it for G3 fax, ie. 204x98 or 204x196 dpi, with accurate scaling;</i><br>
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<i>> dropping or doubling lines is no good idea and I'm looking for some better</i><br>
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<i>> (generic) way than interpolating from a higher resolution... Any ideas ?</i><br>
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<p>
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The typical Fax-Application is sending black text/simple graphics on white<br>
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background. Thus I would suggest scanning at 204 dpi and or-ing (|) the <br>
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lines you would otherwise drop with the previous ones. <br>
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<p>
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If you scan in Lineart mode, I think this is the way to go. "Dropping" 8 <br>
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lines per inch will result in such an "artifact-line" every 3 mm what should <br>
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be close enough not to be too much annoying.<br>
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<p>
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Real interpolation will require using a grayscale image and weighted adding <br>
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of the lines. I don't believe it will give much better results, except if <br>
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you are sending greyscale images or weird patterns.<br>
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<p>
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What I actually do (inspired by my system setup) is always converting the<br>
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scan (resolution chosen at scan-time) to postscript and sending it to one<br>
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of my printer-queues (one of which is a FAX driver). So I leave the problem<br>
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to Ghostscript. Works pretty well for me, though I probably don't have<br>
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exact scaling.<br>
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<p>
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CU,Andy<br>
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<p>
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<pre>
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--
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Andreas Beck | Email : <<a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de">becka@sunserver1.rz.uni-duesseldorf.de</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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<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">Kolja Waschk: "More on Mustek 8000SP adventures..."</a>
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<li> <b>Previous message:</b> <a href="0103.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: More on Mustek 8000SP adventures..."</a>
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