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<!-- received="Tue May 12 14:24:08 1998 PDT" -->
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<!-- sent="Tue, 12 May 1998 13:01:46 -0700 (PDT)" -->
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<!-- name="Warren Early" -->
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<!-- email="earlyw@sphinx-group.com" -->
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<!-- subject="Re: [umax] Can't use 10-bit scan: "preview cannot handle depth 16"" -->
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<!-- inreplyto="Pine.LNX.3.96.980511193939.139B-100000@steerpike" -->
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<title>sane-devel: Re: [umax] Can't use 10-bit scan: "preview cannot handle depth 16"</title>
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<h1>Re: [umax] Can't use 10-bit scan: "preview cannot handle depth 16"</h1>
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<b>Warren Early</b> (<a href="mailto:earlyw@sphinx-group.com"><i>earlyw@sphinx-group.com</i></a>)<br>
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<i>Tue, 12 May 1998 13:01:46 -0700 (PDT)</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#143">[ date ]</a><a href="index.html#143">[ thread ]</a><a href="subject.html#143">[ subject ]</a><a href="author.html#143">[ author ]</a>
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<li> <b>Next message:</b> <a href="0144.html">David Mosberger-Tang: "Re: Win32 TWAIN DLL to interface with SANE"</a>
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<li> <b>Previous message:</b> <a href="0142.html">Brian Macy: "Re: Win32 TWAIN DLL to interface with SANE"</a>
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</ul>
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My experience with using transparency adapters and 35MM slides is not<br>
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good. One needs at least an 1800dpi *true* optical resolution (not<br>
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interpolated) scanner to get a decent image because the aperture and<br>
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format is so small. You may also have trouble with 'Newton rings' which<br>
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are discolorations at the edges due to reflections from glass surfaces and<br>
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refractions of the light spectrum. If you need to scan 35mm slides better<br>
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to get either a dedicated slide/film scanner or a mixed-media sanner such<br>
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as the AGFA Duo-Scan or Microtek Scanmaker 5.<br>
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<p>
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On Tue, 12 May 1998, Jim Ford wrote:<br>
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<p>
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<i>> </i><br>
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<i>> </i><br>
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<i>> On Fri, 8 May 1998, Paul D. Robertson wrote:</i><br>
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<i>> </i><br>
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<i>> > The adapter seems to work, and *if* I can get the gamma correction working </i><br>
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<i>> > right, I'm sure it will be well-worth it for me. In its current incantation, </i><br>
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<i>> > it works _alright_ for bright slides, as long as I add about 93 to the </i><br>
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<i>> > Image->Brightness/Contrast sliders in the GIMP. Darker slides don't scan </i><br>
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<i>> > well, and negatives are much worse. </i><br>
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<i>> > </i><br>
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<i>> > Once I get things back to normal, I'll see what I can do with the gamma </i><br>
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<i>> > stuff, and report my results back to the list.</i><br>
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<i>> > </i><br>
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<i>> > Since I've got some 6x6 and 6x4.5 slides and negatives, and there aren't </i><br>
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<i>> > a large number of alternatives, I'm in this for as long as I can stand </i><br>
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<i>> > it, or until someone comes out with an inexpensive 120/220 scanner that </i><br>
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<i>> > will work with sane. </i><br>
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<i>> </i><br>
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<i>> Hmmm - sounds like the transparency adaptor might not be such a good idea</i><br>
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<i>> - like I said, in the UK it costs as much as the sanner itself - 199 UK</i><br>
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<i>> pounds! </i><br>
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<i>> </i><br>
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<i>> I'd be using it for 35mm transparencies. How do you think it would perform</i><br>
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<i>> with a good sharp 35mm transparency?</i><br>
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<i>> </i><br>
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<i>> Regards: Jim Ford</i><br>
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<i>> </i><br>
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<i>> </i><br>
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<i>> </i><br>
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<i>> --</i><br>
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<i>> Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a></i><br>
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<i>> To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a></i><br>
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<i>> </i><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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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</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="0144.html">David Mosberger-Tang: "Re: Win32 TWAIN DLL to interface with SANE"</a>
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<li> <b>Previous message:</b> <a href="0142.html">Brian Macy: "Re: Win32 TWAIN DLL to interface with SANE"</a>
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