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Submission + - Optical Mice Used to Detect Counterfeit Coins

JimXugle writes: "El Mundo reports (Original Spanish article, Google Translate) that Spanish researchers at The University of Lleida have used a modified optical mouse to detect counterfeit €2 coins with a success rate comparable to that of an expert trained to do so. Details are to be published freely in the journal "Sensors"."
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Optical Mice Used to Detect Counterfeit Coins

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I have a theory that it's impossible to prove anything, but I can't prove it.