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Re: Photocopying money
>It's the same chip that's used in vending machines to scan dollar bills.
To my knowledge, vending machines don't do optical recognition. They have
a pair of photo-sensors, it's true, but these are used in conjunction with
tractors only to measure the bill. Another sensor decodes the magnetic ink
to determine validity and denomination.
I saw this demonstrated recently on a PBS science program.
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