Method and apparatus for combining video images with proper occl

Details Method and apparatus for combining video images with proper occl Method and apparatus for combining video images with proper occl

1974-05-24

1976-06-01

Britton, Howard W.

Telegraphy

Systems

Simplex-reversing periodic

178DIG6, 178DIG35, 340324AD, H04N 718

Patent

active

039611337

ABSTRACT:
An image generated by a television camera is combined with an image generated from digitally stored information to form a composite scene wherein objects appearing in either image properly occlude one another with respect to the eyepoint from which the scene is viewed. This is accomplished by processing the camera video signal to provide pulses for each raster line which indicate the starting and stopping points of an object viewed by the camera. At the same time, the camera video signal is provided on a delay line to a video switch which also receives the digitally generated video signal. The switch is controlled by logic circuitry in accordance with the established occlusion priority to pass to the video display device the proper signal from either the camera or the image generator.

REFERENCES:
patent: 3441667 (1969-04-01), Novacek
patent: 3479454 (1969-11-01), Wolff
patent: 3621214 (1971-11-01), Romney
patent: 3787619 (1974-01-01), Wolff
patent: 3804977 (1974-04-01), Driskell

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