Patent ID: 11968459
Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. A method for automatic exposure control, comprising:
obtaining a first frame and a second frame of a current scene from a camera, wherein a ratio of a first exposure time of the first frame to a second exposure time of the second frame is a first exposure ratio;
obtaining a first average luminance of a brightest region in the second frame;
obtaining a second average luminance of a darkest region in the first frame;
determining a dynamic range of the current scene based on the first exposure ratio, the first average luminance, and the second average luminance;
obtaining a high average luminance of a high luminance region, a medium average luminance of a medium luminance region, and a low average luminance of a low luminance region in the first frame;
obtaining an overexposure degree of the second frame; and
determining a total luminance result of the current scene based on the dynamic range, the high average luminance, the medium average luminance, the low average luminance, and the overexposure degree.