Patent ID: 8144212

Claim:
A white balance adjustment apparatus which is input image data acquired by an imager element to adjust a balance among color signals of the image data of a present frame, comprising: an image data storage unit configured to store image data of at least one previous frame which is acquired before the present frame; an evaluation value acquisition unit configured to acquire a plurality of groups of color signal data at each pixel position, as evaluation values, from the image data of the present frame and from the image data of the at least one previous frame; a white balance coefficient calculation unit configured to calculate white balance coefficients on the basis of the plurality of groups of evaluation values acquired by the evaluation value acquisition unit; and a white balance correction unit configured to correct the image data of the present frame acquired by the imager element on the basis of the white balance coefficients calculated by the white balance coefficient calculation unit, wherein the evaluation value acquisition unit includes an overlap area detection unit configured to detect image areas overlapping with each other between the image data of the at least one previous frame and the image data of the present frame, and selectively acquires the evaluation values to be acquired from the image data of the at least one previous frame, in response to a detection result from the overlap area detection unit.