Chromakey signal producing apparatus

Details Chromakey signal producing apparatus Chromakey signal producing apparatus

1983-10-18

1986-12-16

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358183, H04N 974

Patent

active

046301011

ABSTRACT:
A chromakey signal producing apparatus is disclosed. A color to be keyed is set as a first reference color and a color not to be keyed is set as a second reference color. A clear chromakey signal is automatically produced by discriminating the difference between the first and second reference colors. According to the invention, even when a part of the TV picture has a color similar to that of the part to be keyed, a clearly discriminated chromakey signal is produced without the need for any complicated sensitivity factor judgment, simply by designating the color of that particular part as the second reference color corresponding to the maximum sensitivity.

REFERENCES:
patent: 4506289 (1985-03-01), Shirakami

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