Patent ID: 7552811

Claim:
Method for testing coins which are inserted into a coin checker and run past an image sensor which has lines and columns and which records an image of the coin to be checked, comprising the steps of: providing information about the movement of the coin with at least one of the front columns in the direction of movement of the coin and at least one line of the image sensor detecting parameters, together with temporal detection information; determining when the coin will appear in a coverage area of the image sensor as a function of the parameters for recording; switching the image sensor into activation of the columns and lines of the coverage area; and triggering the recording; scanning the front edge and the apex of the coin by at least one of the front columns in the direction of movement; determining the diameter of the coin from the scanning of the apex; and after detecting the apex of the coin, then activating at least one line of the image sensor at the level of half the diameter.