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<!-- received="Mon Mar 8 14:20:32 1999 PST" -->
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<!-- sent="Mon, 8 Mar 1999 17:33:18 -0500 (EST)" -->
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<!-- name="Tripp Lilley" -->
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<!-- subject="Re: Bar codes" -->
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<!-- inreplyto="2.2.32.19990308211005.00f5ce18@mdsakl" -->
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<title>sane-devel: Re: Bar codes</title>
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<h1>Re: Bar codes</h1>
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<b>Tripp Lilley</b> (<a href="mailto:tlilley@perspex.com"><i>tlilley@perspex.com</i></a>)<br>
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<i>Mon, 8 Mar 1999 17:33:18 -0500 (EST)</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#83">[ date ]</a><a href="index.html#83">[ thread ]</a><a href="subject.html#83">[ subject ]</a><a href="author.html#83">[ author ]</a>
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<li> <b>Next message:</b> <a href="0084.html">De Clarke: "Re: OCR [was: Bar codes]"</a>
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<li> <b>Previous message:</b> <a href="0082.html">Matthew Diesch: "Bar codes"</a>
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<li> <b>In reply to:</b> <a href="0082.html">Matthew Diesch: "Bar codes"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0088.html">Matthew Diesch: "Re: Bar codes"</a>
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</ul>
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On Tue, 9 Mar 1999, Matthew Diesch wrote:<br>
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<p>
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<i>> Not strictly connected to this list but I'm trying all over the place to get</i><br>
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<i>> this info so here goes. I want to do barcode detection/recognition on</i><br>
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<i>> scanned images and so far the only s/w I can find is proprietry toolkits</i><br>
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<i>> (mostly OCX stuff for MS). </i><br>
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<i>> </i><br>
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<i>> What I really want is either an open source library/toolkit or if all else</i><br>
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<i>> fails some pointers to some algorithms for doing it in which case I'll do it</i><br>
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<i>> myself.</i><br>
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<p>
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Good luck! (Said with equal measures sincerity and sarcasm). I'm right<br>
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there with you, though. There are a couple of open-source OCR projects<br>
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I've found, but none really concerned with barcodes and other<br>
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machine-readable formats.<br>
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<p>
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The latest (March 1999) issue of Circuit Cellar, Ink,<br>
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<a href="http://www.circuitcellar.com/">http://www.circuitcellar.com/</a> has an article on Code 39 with details on<br>
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how to decode it in hardware, which are largely applicable to decoding<br>
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from an image. However, you'll need to investigate deskewing and the like<br>
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before you actually get to the point of having a usable image from which<br>
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to recognize barcode.<br>
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<p>
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If you're interested in recognizing 2D barcodes (like PDF-417), you've a<br>
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bit more work ahead of you. PDF-417 (a pretty popular 2D symbology) is, I<br>
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believe, owned by Symbol Technologies, but I understand that they're<br>
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pretty good about tech support, which means it ought to be straightforward<br>
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to get specs out of them.<br>
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<p>
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I'm certainly interested in joining you on writing some GPL'ed recognition<br>
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code, if we can't find anything else. I have to warn you, though, that I<br>
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have a number of other things on my plate right now :-) (like the revised<br>
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reference PNM backend, and the Fujitsu backend once my docs come in).<br>
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<p>
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Keep in touch!<br>
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<p>
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<pre>
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--
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Tripp Lilley + Innovative Workflow Engineering, Inc. + (<a href="mailto:tripp@iweinc.com">tripp@iweinc.com</a>)
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------------------------------------------------------------------------------
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"Stallman, after all, still has a point: greed, competition, and secrets
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really are, on some level, bad for us; they really do rob the industry of
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a certain amount of genius. The time and energy that is poured into the
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maintenance of proprietary frameworks could be much better spent elsewhere,
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like on real innovation."
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<p>
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<pre>
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--
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Thomas Scoville in <a href="http://opensource.oreilly.com/news/scoville_0399.html">http://opensource.oreilly.com/news/scoville_0399.html</a>
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<p>
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<p>
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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="0084.html">De Clarke: "Re: OCR [was: Bar codes]"</a>
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<li> <b>Previous message:</b> <a href="0082.html">Matthew Diesch: "Bar codes"</a>
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<li> <b>In reply to:</b> <a href="0082.html">Matthew Diesch: "Bar codes"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0088.html">Matthew Diesch: "Re: Bar codes"</a>
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<!-- reply="end" -->
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</ul>
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