| 摘要 |
A mobile camera rig (1) has a pair of cameras (2, 3) for filming a scene (4) and a chassis (4), which is bodily movable in the Y and Z directions, the X direction being to the scene (4). One camera (2) is mounted on rails (5) and provided with an actuator (6) for altering its position in the Y direction within the rig, that is altering its position laterally of the line of sight to the scene. It receives light from the scene via a beam splitting mirror (8) set at 45° to the line of sight. The other camera (3) is fixed above the mirror and oriented vertically to receive light reflected by the mirror. Movement of the camera (2) within the rig by the actuator changes the apparent inter-axial separation A of the cameras. The rig is provided with an inertial motion sensor (9) and is mounted on apparatus for its bodily movement, including bodily movement of the cameras in the Y and Z direction. The actuator (6) and the motion sensor (9) are connected to a controller (10). The controller is an adjunct to a manual inter-axial separation controller for altering the separation to suit the scene being filmed. The manual controller is not adapted to reduce the separation automatically when the cameras are moved bodily. The controller (10) detects the motion in accordance with the camera movement sensed and causes the separation to be reduced, whilst the cameras are in bodily movement. On cessation of the movement, the separation is restored or rest manually. |
