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71 wiersze
3.4 KiB
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<!-- received="Mon Aug 30 11:39:50 1999 PDT" -->
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<!-- sent="Mon, 30 Aug 1999 20:31:22 +0200" -->
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<!-- name="abel deuring" -->
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<!-- email="a.deuring@satzbau-gmbh.de" -->
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<!-- subject="Re: SANE V2 - again..." -->
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<title>sane-devel: Re: SANE V2 - again...</title>
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<h1>Re: SANE V2 - again...</h1>
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<b>abel deuring</b> (<a href="mailto:a.deuring@satzbau-gmbh.de"><i>a.deuring@satzbau-gmbh.de</i></a>)<br>
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<i>Mon, 30 Aug 1999 20:31:22 +0200</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#348">[ date ]</a><a href="index.html#348">[ thread ]</a><a href="subject.html#348">[ subject ]</a><a href="author.html#348">[ author ]</a>
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<li> <b>Next message:</b> <a href="0349.html">abel deuring: "Re: SANE V2 - again..."</a>
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<li> <b>Previous message:</b> <a href="0347.html">Georg Huettenegger: "Re: Mustek MFS-6000CX, once again please."</a>
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<li> <b>Maybe in reply to:</b> <a href="0327.html">abel deuring: "SANE V2 - again..."</a>
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<li> <b>Next in thread:</b> <a href="0349.html">abel deuring: "Re: SANE V2 - again..."</a>
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Hi Oliver!<br>
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<p>
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<i>> If we want to add color correction as a "midend" it could be interesting</i><br>
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<i>> to add a well known option for the color correction matrix (3x3).</i><br>
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<i>> But this could also be done in a frontend, that does not make much</i><br>
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<i>> work so I would'nt write a midend for it.</i><br>
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<p>
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I would like to extend the topic of colour correction: Having a quite<br>
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simple option for a linear transformation is of course fine in many<br>
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situations, but it is not enough for high quality scans. [OK, the<br>
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following mixes the topics of colour correction and calibration...] Look<br>
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for example into some documents of the ICC<br>
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(<a href="http://www.color.org/profiles.html">http://www.color.org/profiles.html</a> or<br>
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<a href="http://www.color.org/iccprofiles.html">http://www.color.org/iccprofiles.html</a>): The ICC profiles allow for<br>
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non-linear transformations in order to achieve better quality. A quite<br>
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complicated but perhaps useful approach to use ICC profiles within Sane<br>
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qould be a transformation <br>
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<p>
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raw<br>
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scan -----------------> CIELab ------------------------> output<br>
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data mapped using data mapped using an data<br>
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an ICC profile ICC profile for <br>
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for the scanner CRT tubes <br>
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(or whatever)<br>
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<p>
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[This develops into another example for a "midend", therefore I won't<br>
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elaborate on that any longer in order to avoid contradictions to my last<br>
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mail...]<br>
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<p>
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Abel<br>
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<p>
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<pre>
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--
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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="0349.html">abel deuring: "Re: SANE V2 - again..."</a>
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<li> <b>Previous message:</b> <a href="0347.html">Georg Huettenegger: "Re: Mustek MFS-6000CX, once again please."</a>
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<li> <b>Maybe in reply to:</b> <a href="0327.html">abel deuring: "SANE V2 - again..."</a>
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<li> <b>Next in thread:</b> <a href="0349.html">abel deuring: "Re: SANE V2 - again..."</a>
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