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75 wiersze
2.8 KiB
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<!-- received="Mon May 26 09:22:54 1997 MST" -->
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<!-- sent="26 May 1997 09:44:37 -0600" -->
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<!-- name="Gordon Matzigkeit" -->
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<!-- email="gord@m-tech.ab.ca" -->
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<!-- subject="a priori image dimensions" -->
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<!-- id="m0wVlMb-000BVpC@charon.beck-sw.de" -->
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<title>sane-devel: a priori image dimensions</title>
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<h1>a priori image dimensions</h1>
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<b>Gordon Matzigkeit</b> (<a href="mailto:gord@m-tech.ab.ca"><i>gord@m-tech.ab.ca</i></a>)<br>
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<i>26 May 1997 09:44:37 -0600</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#18">[ date ]</a><a href="index.html#18">[ thread ]</a><a href="subject.html#18">[ subject ]</a><a href="author.html#18">[ author ]</a>
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<li> <b>Next message:</b> <a href="0019.html">David Mosberger-Tang: "Re: a priori image dimensions"</a>
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<li> <b>Previous message:</b> <a href="0017.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: mustek-probs: color, preview"</a>
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</ul>
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Hi!<br>
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<p>
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Here's question for the list before I spend the time to download<br>
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sane-0.57...<br>
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<p>
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A problem that I've discovered in my PINT backend is that the<br>
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dimensions (both X and Y) cannot be known until the scan is started.<br>
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I've noticed the following line in the TODO:<br>
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<p>
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- xscan: scanning of images whose heights is not known a priori is not<br>
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supported yet; this is going to be important for handheld scanners<br>
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<p>
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Does anybody have ideas on how to implement this, and/or has it been<br>
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done in 0.57?<br>
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<p>
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The easiest way I can think of is to have a call to<br>
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sane_get_parameters after the scan has completed to find out what<br>
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actually happened.<br>
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<p>
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Maybe space for the PNM header could be reserved before the raw data<br>
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is written, such as:<br>
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<p>
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-----<br>
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PX<br>
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# SANE data follows<br>
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# [reserved space, as many bytes as seems appropriate]<br>
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[raw data]<br>
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-----<br>
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<p>
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Then, this could be transformed into a correct PNM header after the<br>
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raw scanner data had been written.<br>
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<p>
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Comments?<br>
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<p>
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<pre>
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--
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Gord Matzigkeit | Proudly running pieces of the GNU operating system.
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gord@m-tech.ab.ca | Jacques Cousteau loved programming in assembler.
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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.azstarnet.com/~axplinux/sane/">http://www.azstarnet.com/~axplinux/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="0019.html">David Mosberger-Tang: "Re: a priori image dimensions"</a>
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<li> <b>Previous message:</b> <a href="0017.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: mustek-probs: color, preview"</a>
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<!-- nextthread="start" -->
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</ul>
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