| 摘要 |
An image tracking system (2) comprises a video camera (3) or other device for presenting a sequence of images to a processor (4). The images are presented in real time in the form of a sequence of video fields. The processor (4) determines (79) the position of a target image in a preceding image frame, for instance using a template matching technique limited to the region of the image field where the target image may be located. The processor (4) then determines (76) the amount of movement between the preceding field and the next field, for instance by using a differential technique. The updated position of the target image is then formed (77) as the sum of the position of the target image in the preceding field and the amount of movement between the preceding field and the next consecutive field. The position data are supplied (78), for instance, to a window steering mechanism (6) of an autostereoscopic 3D display (7) so that the eyes of an observer (8) can be tracked to ensure autostereoscopic viewing of the display (7) with an enlarged degree of freedom of movement of the observer. <IMAGE> <IMAGE> |
