Automatic digital white-balancing circuit utilizing memory addre

Details Automatic digital white-balancing circuit utilizing memory addre Automatic digital white-balancing circuit utilizing memory addre

1991-12-11

1994-03-29

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Color balance or temperature

348223, H04N 973

Patent

active

052989798

ABSTRACT:
An automatic digital white-balancing circuit comprises multipliers, a color difference matrix, an encoder sampling part, a integrating memory part, a comparing part, and a microcomputer, wherein the multipliers multiply color separated digital signals by multiplying coefficients applied from the microcomputer, the sampling part samples Y signals and R-Y and B-Y color difference signals of the matrix part, the integrating memory part integrates the output data from the sampling part and stores in the memory, and the comparing part decides whether the integrated data is included in a white balance adjusting region. Thus, the white balance can be adjusted even in a digital video camera as well as in an analogue video camera.

REFERENCES:
patent: 4562459 (1985-12-01), Sokei

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