Systems and methods for automatic exposure control
AssigneeZhejiang Dahua Technology Co., Ltd.
InventorsPeng ZHU, Xingjian ZHENG, Guangxiu YAO, Wei FANG, Yinchang YANG
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to systems and methods for automatic exposure control. The methods may include 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; and determining a dynamic range of the current scene based on the first exposure ratio, the first average luminance, and the second average luminance.
Claims22
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;
- and
- determine a dynamic range of the current scene based on the first exposure ratio, the first average luminance, and the second average luminance.
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 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 a first frame of a current scene obtained from the camera;
- obtain an overexposure degree of a second frame of the current scene obtained from the camera;
- determine a total luminance result of the current scene based on a dynamic range of the current scene, the high average luminance, the medium average luminance, the low average luminance, and the overexposure degree;
- and
- determine first exposure parameters associated with the first frame based on the total luminance result of the current scene.
(canceled)
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;
- and
- determining a dynamic range of the current scene based on the first exposure ratio, the first average luminance, and the second average luminance.
22-26. (canceled)
Dependencies are inferred from the claim text.