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3.1 KiB
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68 wiersze
3.1 KiB
HTML
<!-- received="Fri May 21 06:05:23 1999 PDT" -->
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<!-- sent="Fri, 21 May 1999 13:11:58 +0000" -->
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<!-- name="Chris Bitmead" -->
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<!-- email="chris.bitmead@bigfoot.com" -->
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<!-- subject="Re: Gamma and xsane" -->
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<!-- inreplyto="Gamma and xsane" -->
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<title>sane-devel: Re: Gamma and xsane</title>
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<h1>Re: Gamma and xsane</h1>
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<b>Chris Bitmead</b> (<a href="mailto:chris.bitmead@bigfoot.com"><i>chris.bitmead@bigfoot.com</i></a>)<br>
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<i>Fri, 21 May 1999 13:11:58 +0000</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#226">[ date ]</a><a href="index.html#226">[ thread ]</a><a href="subject.html#226">[ subject ]</a><a href="author.html#226">[ author ]</a>
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<li> <b>Next message:</b> <a href="0227.html">Denis Prost: "Re: only negative output with scanimage (Canon Canoscan 300)"</a>
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<li> <b>Previous message:</b> <a href="0225.html">Oliver Rauch: "Re: Gamma and xsane"</a>
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<li> <b>Maybe in reply to:</b> <a href="0214.html">Chris Bitmead: "Gamma and xsane"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0233.html">Oliver Rauch: "Re: Gamma and xsane"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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Oliver Rauch wrote:<br>
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<i>> if the gamma slider in xsane is set to 1.0 the scanned data keeps untouched,</i><br>
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<i>> if you select another value, the data that comes from the scanner is transformed</i><br>
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<p>
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Do you lose any information this way?<br>
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<p>
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<i>> If you need a gamma correction of 1.0 on your monitor, I think the contast and</i><br>
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<i>> brightness</i><br>
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<i>> of your monitor is much too high. Normally you need a gamma correction of about</i><br>
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<i>> 1.5 - 2.5</i><br>
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<i>> to get good results on a monitor.</i><br>
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<i>> Turn down brightness and contrast.</i><br>
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<p>
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I believe that on high-end equipment, like Silicon Graphics workstations<br>
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and stuff, you can set the gamma to 1.0, and the video driver, or maybe<br>
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the video hardware will transform it appropriately for the monitor. In<br>
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other words, all software can assume a gamma of 1.0 and something<br>
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in-between will adjust it appropriately. There is some command -<br>
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"setgamma" or something. I think even some PC cards can do this too.<br>
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Sounds like a neat idea.<br>
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<p>
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<p>
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<pre>
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--
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Chris Bitmead
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<a href="http://www.bigfoot.com/~chris.bitmead">http://www.bigfoot.com/~chris.bitmead</a>
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<a href="mailto:chris.bitmead@bigfoot.com">mailto:chris.bitmead@bigfoot.com</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.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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<!-- 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="0227.html">Denis Prost: "Re: only negative output with scanimage (Canon Canoscan 300)"</a>
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<li> <b>Previous message:</b> <a href="0225.html">Oliver Rauch: "Re: Gamma and xsane"</a>
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<li> <b>Maybe in reply to:</b> <a href="0214.html">Chris Bitmead: "Gamma and xsane"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0233.html">Oliver Rauch: "Re: Gamma and xsane"</a>
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<!-- reply="end" -->
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</ul>
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