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63 wiersze
3.1 KiB
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<!-- received="Mon May 25 23:01:30 1998 PDT" -->
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<!-- sent="Mon, 25 May 1998 23:01:22 -0700" -->
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<!-- name="John Labovitz" -->
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<!-- email="johnl@meer.net" -->
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<!-- subject="Re: [long] Overall usage impressions" -->
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<title>sane-devel: Re: [long] Overall usage impressions</title>
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<h1>Re: [long] Overall usage impressions</h1>
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<b>John Labovitz</b> (<a href="mailto:johnl@meer.net"><i>johnl@meer.net</i></a>)<br>
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<i>Mon, 25 May 1998 23:01:22 -0700</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#262">[ date ]</a><a href="index.html#262">[ thread ]</a><a href="subject.html#262">[ subject ]</a><a href="author.html#262">[ author ]</a>
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<li> <b>Next message:</b> <a href="0263.html">John Labovitz: "Re: [long] Overall usage impressions"</a>
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<li> <b>Previous message:</b> <a href="0261.html">becka@rz.uni-duesseldorf.de: "Re: sane"</a>
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<li> <b>Maybe in reply to:</b> <a href="0258.html">Paul D. Robertson: "[long] Overall usage impressions"</a>
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<li> <b>Next in thread:</b> <a href="0263.html">John Labovitz: "Re: [long] Overall usage impressions"</a>
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Paul D. Robertson <<a href="mailto:proberts@clark.net">proberts@clark.net</a>> said:<br>
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<p>
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<i>> Oliver once again stepped to my rescue and explained the </i><br>
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<i>> true gamma correction method for xscanimage, and after pressing the gamma </i><br>
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<i>> button and entering a value, things got much, much better. </i><br>
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<p>
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Could you write more about this? I've been scanning black and white<br>
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negatives (Tri-X Pan, mostly) and found a curve setting that worked,<br>
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but i did it by hand (using the straight-line tool at the bottom of<br>
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the left-hand curve toolbar), not using a gamma number. I haven't had<br>
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as good luck scanning color transparencies (Kodak EPD).<br>
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<p>
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I've been meaning to ask a question (to the list in general, not just<br>
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you, Paul) about gamma -- does setting the gamma (either by number or<br>
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by manually shaping the curve) affect the actual scanning operation?<br>
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That is, does the gamma get downloaded to the scanner and used to<br>
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shape the scanned samples, or is just something that's applied to the<br>
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data once it comes back from the scanner?<br>
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<p>
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And while I'm at it, what's the `Highlight (%)' slider do?<br>
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<p>
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john<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="0263.html">John Labovitz: "Re: [long] Overall usage impressions"</a>
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<li> <b>Previous message:</b> <a href="0261.html">becka@rz.uni-duesseldorf.de: "Re: sane"</a>
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<li> <b>Maybe in reply to:</b> <a href="0258.html">Paul D. Robertson: "[long] Overall usage impressions"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0263.html">John Labovitz: "Re: [long] Overall usage impressions"</a>
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<!-- reply="end" -->
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</ul>
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