US Patent 8150158 Unique sensing system and apparatus for reading playing cards

A sensing apparatus is provided for the determination of at least one of rank or suit of a playing card. The sensing apparatus includes an imaging array capable of sensing at least an area of a playing card that represents rank and or suit. A position sensor is provided for determining card position. A hardware component receives signals from the imaging array and the card position sensor. The hardware component forms a vector set from the output from the imaging array and card position sensor, and compares the vector set to known reference vector sets to determine rank and suit of a card.