Suzhou Keda Technology Co., Ltd.

Suzhou Keyuan Software Technology Co., Ltd.

Suzhou Keda Special Video Co., Ltd.

Fengfeng Tang

Yong Zhang

Lijun Cao

Weidong Chen

Guoqing Meng

Jiayang Song

The present disclosure provides a method for generating a high dynamic range image from a low dynamic range image, including performing grey-level adjustment on a low dynamic range image to be processed in accordance with a preset mapping relationship to obtain an image after the grey-level adjustment, the grey-level adjustment includes inverse-gamma correction and grey-level value increase; selecting a plurality of saturation areas in the image after the grey-level adjustment; performing grey-level enhancement of the saturation areas in the image after the grey-level adjustment, to obtain a target high dynamic range image; and outputting the target high dynamic range image.

Method for generating high dynamic range image from low dynamic range image

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.

Automatic focusing method and apparatus based on region of interest

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Jiangsu, China

Fengfeng Tang