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Index › Discussion › Exhibition › Barcode scanner in pure processing
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Barcode scanner in pure processing (Read 1716 times)
Guru
Barcode scanner in pure processing
Sep 22nd, 2009, 10:45am  
I always considered barcode scanners as a pice of rocketscience that mere mortals like me aren't able to build. But this weekend megalomania hit me and i wrote one in processing. I didn't use any libraries beside GSVideo (on my linux box) or processing.video (wherever quicktime is available)

http://www.local-guru.net/blog/2009/09/22/barcodescanner-in-pure-processing

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liudr
Re: Barcode scanner in pure processing
Reply #1 - Nov 1st, 2009, 11:41am  
Sounds good! What program did you use to print out the bar codes on paper?

One suggestion: try scan vertically, and a couple of diagonal lines. Discard the kind of scans without the start code until you find one scan that has a start code. Loop until you recognize a code, then pause for a second or two and start again.
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antiquekid3
Re: Barcode scanner in pure processing
Reply #2 - Nov 19th, 2009, 3:50pm  
I really like this. How hard would it be to implement it for Code 39 barcode? This doesn't involve any checksums; only detecting two asterisks: one at the beginning, one at the end. There are 9 bars (white/black), three of which are between two and three times as thick as the small lines. I think decoding Code 39 should be easier.

Kyle
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