Split white balance processing of a color image

Details Split white balance processing of a color image Split white balance processing of a color image

1997-03-19

1999-06-29

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Color balance or temperature

348223, 348280, H04N 973

Patent

active

059175567

ABSTRACT:
A method for correcting a color video signal for white balance comprising the steps of:
providing a digital color image signal having a sequence of monocolor pixels, wherein each of the pixels represents one color of first, second, and third different colors, which are repeated in a preset pattern;
coarse white balance processing each monocolor pixel for a coarse white balance;
spatial processing the sequence of monocolor pixels to produce a sequence of tricolor pixels, wherein each of the tricolor pixels represents the first, second, and third different colors; and
color correction and fine white balance processing each of the tricolor pixels by means of a matrix multiplier for color correction and fine white balance.

REFERENCES:
patent: 3971065 (1976-07-01), Bayer
patent: 4234890 (1980-11-01), Astle
patent: 4706108 (1987-11-01), Kumagai
patent: 5668596 (1997-09-01), Vogel

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