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97 wiersze
4.9 KiB
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<!-- received="Thu Mar 13 11:24:34 1997 MST" -->
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<!-- sent="Thu, 13 Mar 1997 12:22:10 -0600 (CST)" -->
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<!-- name="Nem W Schlecht" -->
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<!-- email="nem@abattoir.cc.ndsu.nodak.edu" -->
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<!-- subject="Scan Area & Origin (4.5.2)" -->
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<!-- id="199703131822.MAA10624@abattoir.cc.ndsu.nodak.edu" -->
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<title>sane-devel: Scan Area & Origin (4.5.2)</title>
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<h1>Scan Area & Origin (4.5.2)</h1>
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<b>Nem W Schlecht</b> (<a href="mailto:nem@abattoir.cc.ndsu.nodak.edu"><i>nem@abattoir.cc.ndsu.nodak.edu</i></a>)<br>
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<i>Thu, 13 Mar 1997 12:22:10 -0600 (CST)</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#11">[ date ]</a><a href="index.html#11">[ thread ]</a><a href="subject.html#11">[ subject ]</a><a href="author.html#11">[ author ]</a>
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<li> <b>Next message:</b> <a href="0012.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: Scan Area & Origin (4.5.2)"</a>
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<li> <b>Previous message:</b> <a href="0010.html">David Mosberger-Tang: "Re: sane and java?"</a>
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<li> <b>Next in thread:</b> <a href="0012.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: Scan Area & Origin (4.5.2)"</a>
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<li> <b>Reply:</b> <a href="0012.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: Scan Area & Origin (4.5.2)"</a>
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</ul>
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I have a question relating to the origin and the scanning coordinates.<br>
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My scanner is a little odd (I think) in that the lamp is in the front of<br>
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the scanner. ie: (bad ascii drawings)<br>
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<p>
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---------- Lid<br>
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o-------o | <br>
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/|\ |\ v /^\a<br>
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<i> | | \ | \ |</i><br>
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<i> | | \ | \ |</i><br>
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<i> | | \___+___\ | Scanning goes this way</i><br>
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<i> | | | |</i><br>
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<i> | |_______|</i><br>
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<i> |/_______/ <---- light element here when scanner idle</i><br>
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<p>
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<p>
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Now... my origin is located, in what I consider to be the front left side<br>
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(marked with 'o'):<br>
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<p>
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+-+ +-o<br>
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Mine | | HP | | <br>
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o-+ +-+<br>
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<p>
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The rulers and a big red arrow both correspond to this. On one of the HP<br>
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scanners here that I looked at, the origin in is the back right side (but<br>
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the element is stored in the back also).<br>
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Now to the actual question.. I noticed in section 4.5.2 of the SANE<br>
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Project docs that the origin is specified as the back left corner. I have<br>
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no problem with converting scanning co-ordinates or changing bits around<br>
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for BW/Halftone scans, but I'm wondering if this should be somehow<br>
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corellated (sp?) to where the light element and CCD array start from.<br>
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Otherwise, whenever I scan in something from 0x0 to 2x2, my light element<br>
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has to travel all the way to the other side and then back again.<br>
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I'm probably being *way* too picky about this, especially since having a<br>
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preview window will let the user do whatever they want, but it is kinda<br>
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odd. (BTW - I have to put pictures/etc in my scanner upside down, with the<br>
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top of the picture facing me when I place it in scanner. I already have<br>
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most of the code to switch it around done, though).<br>
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<p>
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PS:<br>
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I have BW/Halftone/Greyscale (Color still not working) scanning now<br>
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working on my SGI and Scanpaq SQ2400 (this is still with mtekscan - once I<br>
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get this working, I'm going to start on my Microtek backend for SANE). I<br>
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think I'm really close to finishing up `the now named' sanei_scsi.c for my<br>
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platform.<br>
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One other question - the SCSI code is quite different for my machine, and<br>
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I'm guessing it's going to look pretty radical with the ioctl() calls that<br>
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I'm going to have to do under Digital UNIX. Are we going to try to keep<br>
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this all in one file and use preprocessor commands, or do something where<br>
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we have a "scsi" directory, and we make a sym-link to the proper scsi<br>
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module, naming it "sanei_scsi.c". Something to think about...<br>
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<p>
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<pre>
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--
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Nem W Schlecht <a href="mailto:nem@plains.nodak.edu">nem@plains.nodak.edu</a>
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NDUS UNIX SysAdmin <a href="http://www.nodak.edu/~nem">http://www.nodak.edu/~nem</a>
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"Perl did the magic. I just waved the wand."
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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="0012.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: Scan Area & Origin (4.5.2)"</a>
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<li> <b>Previous message:</b> <a href="0010.html">David Mosberger-Tang: "Re: sane and java?"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0012.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: Scan Area & Origin (4.5.2)"</a>
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<li> <b>Reply:</b> <a href="0012.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: Scan Area & Origin (4.5.2)"</a>
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</ul>
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