| 摘要 |
A navigation system comprising a navigational device suitable for fitment on or carriage by a vehicle (100) and at least one positional marker (400) located in a fixed position relative to a highway along which the vehicle can travel. The navigational device includes a processing means arranged to receive a feed from a camera including an image of a scene ahead of the vehicle (100), process the image to identify any positional markers (400) in the scene, determine the absolute position of the positional marker (400) using information associated with the marker, determine the distance between the vehicle (100) and the positional marker (400) by processing of the image fed from the camera; and from the absolute position and distance determine an estimate of the position of the vehicle (100). |
