Key signal generating apparatus for digital chromakey system

Details Key signal generating apparatus for digital chromakey system Key signal generating apparatus for digital chromakey system

H - Electricity

04

N

350/41

H04N 9/76 (2006.01) H04N 9/75 (2006.01)

Patent

CA 1202409

KEY SIGNAL GENERATING APPARATUS FOR DIGITAL CHROMAKEY SYSTEM ABSTRACT OF THE DISCLOSURE A key signal generating apparatus for digital chromakey system for generating a key signal in accordance with a distance between a reference hue corresponding to a back color data and a hue of all input video data in U-V chroma signal coordinates is disclosed, in which the gain of the key signal is determined by quadratic curve groups in the U-V chroma signal coordinates.

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