An operator input device (40) is configured to provide position information based on relative movement of a surface (116) and the operator input device (40). The operator input device (40) includes an image detector (110) which is configured to detect an image on the surface (116) and provide an image signal corresponding to the image detected. A controller (112) is coupled to the image detector (110) and is configured to receive the image signal and provide the position information based on a position of the image relative to the image detector (110).
