Method and apparatus for automatically adjusting white balance

Details Method and apparatus for automatically adjusting white balance Method and apparatus for automatically adjusting white balance

1988-08-12

1989-11-28

Scott, Jr., Leon

Optics: measuring and testing

By shade or color

G01J 346

Patent

active

048833606

ABSTRACT:
An automatic white balance adjusting method in which color difference signals (E.sub.R -E.sub.Y) and (E.sub.B -E.sub.Y) obtained by photographing an object are respectively integrated over the entire screen and the gains of red and blue signals are respectively controlled so that the resultant integration average values can be respectively indentical with predetermined reference levels. In the method, when the respective color difference signals are integrated, only the weak color difference signals are selectively integrated. Also, there are set predetermined limits respectively to the gains of the red and blue signals.

REFERENCES:
patent: 4504853 (1985-03-01), Faroudja
patent: 4646754 (1987-03-01), Seale

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