The EURion constellation is a pattern of symbols found on a number of banknote designs worldwide since about 1996. It is added to help software detect the presence of a banknote in a digital image. Such software can then block the user from reproducing banknotes to prevent counterfeiting using colour photocopiers.
Monday, January 31, 2011
EURion constellation
https://secure.wikimedia.org/wikipedia/en/wiki/EURion_constellation
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