Activity-based system and method for reducing gain imbalance...

Details Activity-based system and method for reducing gain imbalance... Activity-based system and method for reducing gain imbalance...

2008-03-13

2011-11-22

Tran, Sinh (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S255000, C382S254000

Reexamination Certificate

active

08063949

ABSTRACT:
An activity-based system for, and method of, reducing Gr-Gb gain imbalance and a digital camera incorporating the system or the method. In one embodiment, the system includes: (1) a sensor configured to provide a input Bayer pattern array containing amplitudes corresponding to Gr and Gb cells and (2) a processor coupled to the sensor and configured to (2a) compute for at least some of the Gr and Gb cells: activity measures for pluralities of adjacent, same-type cells, green precompensation factors based on the activity measures, averages for the pluralities of adjacent, same-type cells and averages for pluralities of adjacent, opposite-type cells and (2b) use the green precompensation factors, the averages for the pluralities of adjacent, same-type cells and the averages for the pluralities of adjacent, opposite-type cells to form an output Bayer pattern in which the Gr-Gb gain imbalance is reduced.

REFERENCES:
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patent: 7826656 (2010-11-01), Chiu
patent: 2002/0167602 (2002-11-01), Nguyen
patent: 2005/0088455 (2005-04-01), Chang
patent: 2006/0050159 (2006-03-01), Ahn
patent: 2006/0146149 (2006-07-01), Palum et al.
patent: 2007/0165116 (2007-07-01), Hung et al.
Munenori Oizumi, “Proximity-Based System and Method for Reducing Gain Imbalance in a Bayer Pattern and Digital Camera Employing the Same” U.S. Appl. No. 12/037,449, filed Feb. 26, 2008.

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