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

Claim 0:
1. A system for automatic exposure control, comprising:
at least one storage medium including a set of instructions for automatically adjusting exposure parameters of a camera; and
at least one processor in communication with the storage medium, wherein when executing the set of instructions, the at least one processor is directed to:
obtain a first frame and a second frame of a current scene from the 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;
obtain a first average luminance of a brightest region in the second frame;
obtain a second average luminance of a darkest region in the first frame;
determine a dynamic range of the current scene based on the first exposure ratio, the first average luminance, and the second average luminance;
obtain 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;
obtain an overexposure degree of the second frame; and
determine 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.