A coin discriminating method includes steps of irradiating a surface of a coin with light, photoelectrically detecting light reflected by the surface of the coin, producing detected pattern data of the surface of the coin, binarizing corresponding reference pattern data so that “1” is assigned to...http://www.google.de/patents/US7209582?utm_source=gb-gplus-sharePatent US7209582 - Coin discriminating method and apparatus
