Optical chromakey field

Details Optical chromakey field Optical chromakey field

1989-11-30

1990-12-18

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358185, 352 88, 362 16, H04N 975, H04N 5222

Patent

active

049790218

ABSTRACT:
A method and apparatus for causing a video camera to produce a video signal to selectively cue special effects, comprising an optical chromakey field including a transparent assembly an illumination apparatus. The transparent assembly is placed in the field of view of the video camera. The on-camera talent can see through the transparent assembly to view a monitor or other object located behind the transparent assembly. The illumination apparatus selectively illuminates the transparent assembly. The transparent assembly presents light of a certain color for reception by the video camera. When special effects are selected, the video camera produces a characteristic video signal operative to cue the special effects.

REFERENCES:
patent: 2314680 (1943-03-01), Batsel
patent: 2323754 (1943-07-01), Oliver
patent: 2797612 (1957-07-01), Holmes
patent: 2962547 (1960-11-01), Douglas
patent: 2977850 (1961-04-01), Vanstrum

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