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81 wiersze
3.5 KiB
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<!-- received="Fri Dec 3 05:28:57 1999 PST" -->
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<!-- sent="Fri, 03 Dec 1999 08:38:12 -0500" -->
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<!-- name="Douglas Gilbert" -->
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<!-- email="dgilbert@interlog.com" -->
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<!-- subject="Re: detrammage" -->
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<!-- inreplyto="detrammage" -->
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<title>sane-devel: Re: detrammage</title>
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<h1>Re: detrammage</h1>
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<b>Douglas Gilbert</b> (<a href="mailto:dgilbert@interlog.com"><i>dgilbert@interlog.com</i></a>)<br>
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<i>Fri, 03 Dec 1999 08:38:12 -0500</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#34">[ date ]</a><a href="index.html#34">[ thread ]</a><a href="subject.html#34">[ subject ]</a><a href="author.html#34">[ author ]</a>
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<li> <b>Next message:</b> <a href="0035.html">Douglas Gilbert: "Re: Problem with SANE and SCSI scanner"</a>
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<li> <b>Previous message:</b> <a href="0033.html">Oliver Rauch: "Re: Cross platform GUI toolkit"</a>
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<li> <b>Maybe in reply to:</b> <a href="0006.html">Philippe Amelant: "detrammage"</a>
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</ul>
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Dave Hill wrote:<br>
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<i>> </i><br>
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<i>> Philippe Amelant wrote:</i><br>
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<i>> ></i><br>
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<i>> > hi, i 'am french and i don't speak english very well so</i><br>
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<i>> > please be indulgent.</i><br>
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<i>> ></i><br>
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<i>> > i vould like to know howto make a "detrammage"</i><br>
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<i>> > i don't know the english word to say that...</i><br>
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<i>> > this operation is required when you scan from mag</i><br>
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<i>> > else you obtain an ugly image...</i><br>
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<i>> > i hope you understand what i mean ...</i><br>
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<i>> ></i><br>
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<i>> > thank</i><br>
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<i>> ></i><br>
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<i>> </i><br>
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<i>> Hello Philippe,</i><br>
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<i>> </i><br>
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<i>> I think that you mean "descreen". This is to get rid of the</i><br>
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<i>> nasty pattern that you get when scanning a magazine or</i><br>
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<i>> newspaper image. It is caused by the dots that make up the</i><br>
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<i>> image interfering with the scan.</i><br>
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<i>> </i><br>
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<i>> If you are using GIMP as your image processor, there is a</i><br>
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<i>> descreen filter in "Filters -> Enhance -> Despeckle" that</i><br>
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<i>> will go the job.</i><br>
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<i>> </i><br>
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<i>> If you don't have GIMP, you can try softening the image if</i><br>
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<i>> your backend drivers supports it, or for a last resort, try</i><br>
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<i>> this:-</i><br>
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<i>> </i><br>
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<i>> Carefully (!!) place a suitable sheet of glass on the scanner</i><br>
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<i>> bed and put the image on top of that. Scan as usual. The glass</i><br>
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<i>> will slightly defocus the image and remove the pattern. Be very</i><br>
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<i>> careful not to scratch the scanner's own glass!!</i><br>
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<p>
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So that is why I get that effect when I scan magazines!<br>
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That has been puzzling me for a long time.<br>
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<p>
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Thanks for that useful insight.<br>
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<p>
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Doug Gilbert<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>Next message:</b> <a href="0035.html">Douglas Gilbert: "Re: Problem with SANE and SCSI scanner"</a>
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<li> <b>Previous message:</b> <a href="0033.html">Oliver Rauch: "Re: Cross platform GUI toolkit"</a>
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<li> <b>Maybe in reply to:</b> <a href="0006.html">Philippe Amelant: "detrammage"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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