Television – Image signal processing circuitry specific to television – Special effects
Reexamination Certificate
2005-08-09
2005-08-09
Yenke, Brian P. (Department: 2614)
Television
Image signal processing circuitry specific to television
Special effects
C348S590000, C348S591000, C382S164000, C382S165000, C345S629000
Reexamination Certificate
active
06927803
ABSTRACT:
A video mixing apparatus carries out a chromakey process producing less degradation of picture quality by generating a key signal which separates a foreground object component from a screen component by using luminance information. In a three-dimensional color space, a smaller oval body surrounding a region where the foreground object is distributed and a larger oval body surrounding the smaller one are set. These two oval bodies and a distribution of a source video signal determine a key signal distribution. Key signal K=0 (zero) when the source video signal is inside the smaller oval body, and K=1 (one) when the signal is outside the larger oval body. 0<K<1 when the signal is between the smaller and the larger oval bodies. Based on the key signal K generated, the source video signal is mixed with the background video signal.
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Toyama Naoki
Yamada Yoshiki
RatnerPrestia
Yenke Brian P.
LandOfFree
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