Abstract: A relative positioning system, an arrangement, and a method. A method for determining a position of a second vehicle relative to a first vehicle. At least an image of a field of view wherein the second vehicle is positioned within the field of view is recorded using an optical device mounted on the first. Image data is processed in a processor to determine a position of the second vehicle relative the first vehicle measuring at least one marker arranged on the second vehicle in the image.

Abstract: Image-based movement tracking of a number of objects in a particular area. A number of image registration units repeatedly record data pertaining to multiple simultaneous representations of events occurring within the area. At least one stereo-pair of cameras repeatedly record stereo-image data based upon which a data processing unit repeatedly determines a respective position for each of the objects. A first camera and a second camera in the stereo-pair are separated by a base distance. Moreover, the cameras are essentially parallel and directed towards the area, such that a first image plane of the first camera registers a portion of the area, which substantially overlaps a portion of the area registered by a second image plane of the second camera.

Abstract: A 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.