A method and a device for the registration of the movement of a vehicle

摘要

PCT No. PCT/SE94/00503 Sec. 371 Date Jul. 23, 1996 Sec. 102(e) Date Jul. 23, 1996 PCT Filed May 27, 1994 PCT Pub. No. WO94/28377 PCT Pub. Date Dec. 8, 1994A device and method for registering the displacement of a vehicle using a video camera device located above the ground and including a pair of cameras spaced parallel to the ground and directed to record on their respective image planes areas of the ground which overlap at least partly whereby there are produced in the cameras pairs of stereo records. These pairs of stereo records are utilized in an image processing of the mutual locations of contrast fields within the contour of the vehicle for comparison. The contrast fields are located at different height levels above the ground so that evaluation of at least one of the fields may be used in the image processing as an indicator in tracking the displacement of the vehicle for successive positions of displacement to be registered.