| 摘要 |
<p>A composite photography system of the registered matte type including a foreground camera movable linearly in X, Y and Z directions and in pan and tilt, and a background camera coupled with the former for corresponding movement so that the perspectives from which the cameras view their respective scenes remain substantially identical despite movement of the cameras relative to their viewed scenes. In a preferred form, the background camera views a background scene constructed on a different scale from the scale of the scene viewed by the foreground camera, and the coupling means includes scaling means for correspondingly modifying certain signals generated as functions of foreground camera movement. The scaling means also includes adjustable means for selectively changing the ratio of linear movement of the background camera relative to such movement of the foreground camera, in order to facilitate adaptation of the system for use with plural background scenes having different ratios of size relative to the foreground scene. When the background objects are in the form of a miniaturized set, the optical system of the background camera desirably includes a periscopic lens so that the camera proper can be spaced from the set. Means are provided in the mounting of the background camera for compensating for the effect of the displacement, in the typical mounting of the foreground camera, of the nodal point of its optical system from the mechanical center around which the foreground camera pivots in pan and tilt movements.</p> |
