Suzhou Keda Technology Co., Ltd.

Suzhou Keyuan Software Technology Co., Ltd.

Suzhou Keda Special Video Co., Ltd.

Jiayang Song

Yong Zhang

Lijun Cao

Fengfeng Tang

Weidong Chen

An automatic focusing method and apparatus comprise the following steps: acquiring a target image that has been divided into blocks; acquiring the definition of each block, respectively; acquiring normalized central coordinates and a normalized size of a region of interest on the target image; respectively calculating a full width at half maximum coefficient in the horizontal direction and the vertical direction according to the normalized size; calculating a weight value of each block using a two-dimensional discrete Gaussian function according to the normalized central coordinates and the full width at half maximum coefficient; calculating a normalized overall definition of the target image according to the weight value and definition of each block; and focusing according to the normalized overall definition. The method and apparatus can automatically calculate a mask of the region of interest, thereby avoiding the occupying of storage space required when storing ROI mask data.

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Jiangsu, China

Jiayang Song