Method of controlling auto white balance

Details Method of controlling auto white balance Method of controlling auto white balance

2011-06-28

2011-06-28

Tran, Sinh (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C382S162000, C382S167000

Reexamination Certificate

active

07969480

ABSTRACT:
There is provided a method of controlling auto white balance that can be appropriately used for a camera of an electric device that uses a wide-angle or a super wide-angle lens. A method of controlling auto white balance according to an aspect of the invention may include: converting a color space of an input image from an RGB color space into a YCbCr color space; dividing the input image into a plurality of divided regions; selecting a predetermined number of divided regions in order determined by mean values of Y of pixels included in the plurality of divided regions; comparing a predetermined threshold value with the number of pixels having values of Cb and Cr within a predetermined Cb-Cr range among the pixels included in the selected divided regions in order to determine a white area; and calculating auto white balance gains by using mean values of Y, mean values of Cb, and mean values of Cr of the pixels included in each of the selected divided regions when the number of pixels within the predetermined Cb-Cr range is greater than the threshold value.

REFERENCES:
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patent: 6798449 (2004-09-01), Hsieh
patent: 6965401 (2005-11-01), Takei
patent: 2002/0122120 (2002-09-01), Hsieh
patent: 2008/0068468 (2008-03-01), Kitajima
patent: 2008/0266417 (2008-10-01), Abe
patent: 10-2004-0067086 (2004-07-01), None

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