Chroma keying system

Details Chroma keying system Chroma keying system

H - Electricity

04

N

350/41

H04N 9/04 (2006.01) H04N 9/75 (2006.01)

Patent

CA 1165433

-17- CHROMA KEYING SYSTEM Abstract of the Disclosure A chroma keying system which prevents the pro- duction of a chroma key signal when the primary color signals are equal is described. This system ef- fectively prevents chroma keys on monochrome portions of color foreground camera signals. These monochrome portions are typically caused by uneven studio light- ing and the resulting shadows and reflections. The system includes a comparator which compares the R, G, and B signals and generates an inhibit signal there- from. This inhibit signal is then used to prohibit the generation of a chroma key signal.

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