Printing Keys and using OCR.

[Casey Jones]

Roscoe wrote:
>Does anyone :
> 
> Know of a system that can take binary data and output an image to be
> printed out, that is then capable of extracting that binary data from
> an imperfect scan of the image.

The wiki page on barcodes
http://en.wikipedia.org/wiki/Barcode
has a list of 2d barcodes including one proprietary one that can store 
1MB of data per page. One funny application they suggested for it on 
their website was to print a sound file of how to pronounce your name on 
your business card.

There appears to be an open source project going for PDF417
http://en.wikipedia.org/wiki/PDF417