Auto white balance apparatus and white balance adjusting method

Details Auto white balance apparatus and white balance adjusting method Auto white balance apparatus and white balance adjusting method

2005-10-24

2008-11-11

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07450160

ABSTRACT:
To provide an auto white balance apparatus capable of performing stable white balance adjustment. A parent block is divided into child blocks by a block-dividing circuit110,and a typical value is calculated every child block by a typical-value calculating circuit120,and then the distance between the typical color difference component of each parent block and the typical color difference component of each child block is obtained on a color difference plane. A child block satisfying a condition equal to or less than a threshold value S is selected to recalculate reliability of a parent blocks by using only selected child blocks. Moreover, a white balance evaluating circuit130corrects reliabilities of parent blocks in accordance with the number of unselected child blocks.

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