| 摘要 |
The present invention relates to playing cards that include a machine-readable bar code in the form of a number of mutually parallel and juxtaposed bars, wherein the code is adapted to be read by light sensitive detectors. The invention is characterised in that each playing card (1) includes at least one six-position binary code (2) where a bar is either present or absent at each position (11-16); in that the code (2) is expanded with a reference code (18) in the form of a bar in at least one further position (19) by the side of said binary code; and in that the reference code (18) is arranged for detection by a light sensitive detector (3), wherein the binary code is intended to be read by means of said light sensitive detectors (11-16) when the reference code is detected. <IMAGE> |
