Hangzhou Hikvision Digital Technology Co., Ltd.

Feng Zeng

Gang Liu

Lei Chen

Renfu Tian

The application provides a white balance adjustment method, apparatus, camera, and medium. This method includes: obtaining a current image taken by the camera; determining a brightness value of the image and the acquisition parameter values with which the image is captured by the camera, in which the acquisition parameter values includes the exposure time, the exposure gain and the aperture value with which the image is captured by the camera; determining the first white balance gain, according to brightness value, exposure time, exposure gain and aperture value; calculating a second white balance gain with which the image is captured by the camera, according to the three-primary-color values of the pixel points of the image; adjusting the white balance gain of the camera according to the first white balance gain and the second white balance gain. The white balance gain determined by the embodiment of this application may better compensate for the color difference of the image taken by the camera.

White balance adjustment method and apparatus, camera and medium

Embodiment of the present application provides a method and an apparatus for calculating a luminance value of a region of interest. The method includes: determining a region of interest where an object of interest is located in a current video frame, and determining a state of the object of interest; dividing the region of interest into a preset number of sub-region blocks, and obtaining a luminance value of each of the sub-region blocks; determining a weight for the luminance value of each of the sub-region blocks in the region of interest according to correspondences between preset states of the object of interest and weights for luminance values of the sub-region blocks in the region of interest, and the state of the object of interest; wherein, a preset state of the object of interest corresponds to the preset number of weights for luminance values; and integrating luminance values of the sub-region blocks in the region of interest according to the weights for luminance values of the sub-region blocks to obtain the luminance value of the region of interest. With the solution provided by embodiments of the present application, the luminance value of the region of interest where the object of interest is located can be obtained with increased accuracy.

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Zhejiang, China

Feng Zeng