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<!-- received="Thu Dec 3 09:30:07 1998 PST" -->
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<!-- sent="03 Dec 1998 09:29:07 -0800" -->
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<!-- name="David Fox" -->
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<!-- email="dsfox@cogsci.ucsd.edu" -->
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<!-- subject="Re: Adjusting contrast and brightness" -->
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<!-- inreplyto="Wed, 02 Dec 1998 18:03:31 +0100"" -->
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<title>sane-devel: Re: Adjusting contrast and brightness</title>
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<h1>Re: Adjusting contrast and brightness</h1>
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<b>David Fox</b> (<a href="mailto:dsfox@cogsci.ucsd.edu"><i>dsfox@cogsci.ucsd.edu</i></a>)<br>
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<i>03 Dec 1998 09:29:07 -0800</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#24">[ date ]</a><a href="index.html#24">[ thread ]</a><a href="subject.html#24">[ subject ]</a><a href="author.html#24">[ author ]</a>
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<li> <b>Next message:</b> <a href="0025.html">Sakari Aaltonen: "Umax Astra 1220S Opinions?"</a>
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<li> <b>Previous message:</b> <a href="0023.html">William L. Sebok: "Re: Adjusting contrast and brightness"</a>
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<li> <b>In reply to:</b> <a href="0018.html">Oliver Rauch: "Re: Adjusting contrast and brightness"</a>
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<li> <b>Next in thread:</b> <a href="0023.html">William L. Sebok: "Re: Adjusting contrast and brightness"</a>
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</ul>
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<!-- body="start" -->
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Oliver Rauch <<a href="mailto:oliver.rauch@Wolfsburg.DE">oliver.rauch@Wolfsburg.DE</a>> writes:<br>
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<p>
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<i>> William L. Sebok wrote:</i><br>
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<i>> </i><br>
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<i>> > David Fox says:</i><br>
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<i>> > > What I miss from the Windows scanning software is the way it could</i><br>
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<i>> > > automatically choose good settings for the brightness and contrast</i><br>
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<i>> > > based on the selected section of the preview. I'm interested in</i><br>
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<i>> > > implementing this for xscanimage, can anyone point me to a good</i><br>
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<i>> > > algorithm for doing this, or to a source of good algorithms?</i><br>
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<i>> ></i><br>
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<i>> > Actually, automatically choosing brightness, contrast and gamma</i><br>
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<i>> > from a selection on the preview is exactly the feature on the</i><br>
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<i>> > windows driver for my Umax S12 that I miss most in sane. That and</i><br>
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<i>> > being able to zoom the preview window to make a decently precise</i><br>
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<i>> > selection.</i><br>
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<i>> ></i><br>
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<i>> </i><br>
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<i>> Will all be included into my new frontend.</i><br>
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<i>> Online gamma/contrast/brightness-changes already work,</i><br>
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<i>> automatic contrast/brightness is easy to implement.</i><br>
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<i>> </i><br>
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<i>> I think I will make a pre-alpha-version available next week!</i><br>
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<p>
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I'm looking forward to it! I'd also be interested in hearing how this<br>
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is implemented. It ``feels'' like at least a semi-difficult problem<br>
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to me.<br>
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<pre>
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--
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David Fox <a href="http://hci.ucsd.edu/dsf">http://hci.ucsd.edu/dsf</a> xoF divaD
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UCSD HCI Lab baL ICH DSCU
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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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<!-- 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="0025.html">Sakari Aaltonen: "Umax Astra 1220S Opinions?"</a>
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<li> <b>Previous message:</b> <a href="0023.html">William L. Sebok: "Re: Adjusting contrast and brightness"</a>
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<li> <b>In reply to:</b> <a href="0018.html">Oliver Rauch: "Re: Adjusting contrast and brightness"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0023.html">William L. Sebok: "Re: Adjusting contrast and brightness"</a>
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<!-- reply="end" -->
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</ul>
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