Foreground stabilization system for use in composite photography

Details Foreground stabilization system for use in composite photography Foreground stabilization system for use in composite photography

1978-01-23

1979-10-02

Hayes, Monroe H.

Optics: motion pictures

Special effects

352 46, 352 53, 352133, G03B 2132

Patent

active

041696662

ABSTRACT:
In a composite photography system of the type wherein a foreground camera photographs life-size actors and objects while a background camera photographs scenery on a life-size scale or a scale different from life-size so that when the outputs from both cameras are combined the actor or foreground objects will appear to be located in the scenery filmed by the background camera, it is crucial that the motion of the background camera be slaved to the motion of the foreground camera. The foreground camera is mounted on a yaw and pitch support mechanism which is in turn mounted on a boom that provides movement along the z axis. The boom is carried by a dolly that moves the entire assembly in the x-y plane. Sensors on the dolly detect movement along the five axes of x, y, z, yaw and pitch, and cause the background camera to move its corresponding amount.
These sensors, however, do not detect dolly rotation about its vertical, or z, axis which is perpendicular to the stage floor, or x-y plane, on which the dolly moves. Even a slight rotation of the dolly as it moves on the stage floor causes a misalignment of the foreground and background scenes. An inertial sensor, located on the dolly, is utilized to sense this rotation.

REFERENCES:
patent: 3902798 (1975-09-01), Trumbull et al.
patent: 3914540 (1975-10-01), Slater

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