| 摘要 |
<p>In a composite photography system of the type wherein a foreground camera photographs a normal dimensioned live actor while a background camera photographs scenery whose size is on a different scale in such a manner so that when the outputs from both cameras are superimposed the actor will appear to be performing in front of the scenery filmed by the background camera, it is necessary to slave the motion of the background camera to the motion of the foreground camera. With conventional type camera supports, the foreground camera's pivotal motions invariably take place about a pivotal axis which is spaced from the nodal point of the camera lens. In order to avoid distortion in the superimposed scenes as the background camera pivots to follow the pivotal motion of the foreground camera, compensation for the displacement of the foreground and background camera pivotal points from their nodal points must be provided to the background camera. Heretofore this has been done mechanically. This invention provides a method and means of electrical compensation instead of mechanical compensation for this displacement.</p> |
