Systems and methods for exposure control

A method for exposure control implemented on an electronic device including at least one lens to intake scenes, at least one exposure-time controller to control an exposure time, at least one sensor to detect a scene from the at least one lens during the exposure time, and at least one processor to receive electronic signals of an image relating to the scene from the at least one sensor during the exposure time, and control the at least one lens, the at least one exposure-time controller, and the at least one sensor, the method comprising:

• obtaining a target frame brightness value of the image;
• obtaining an exposure mode of the electronic device;
• obtaining an exposure table corresponding to the exposure mode, wherein the exposure table includes a plurality of preset values corresponding to one or more exposure parameters of the system, and a plurality of decibel (dB) values each of which corresponds to one of the plurality of preset values;
• determining one or more target values, each of which corresponding to the target frame brightness value and for each of the one or more exposure parameters based on the exposure table;
• and
• adjusting one or more of the at least one lens, the at least one exposure-time controller, and the at least one sensor according to the one or more target values of the one or more exposure parameters.

A system for exposure control, comprising:

• at least one lens to intake scenes;
• at least one exposure-time controller to control an exposure time;
• at least one sensor to detect a scene from the at least one lens during the exposure time;
• and
• at least one processor to receive electronic signals of an image relating to the scene from the at least one sensor during the exposure time, and control the at least one lens, the at least one exposure-time controller, and the at least one sensor, wherein when executing a set of instructions, the at least one processor is directed to cause the system to:
• obtain a current frame brightness value of the image, a current exposure value of the image, and a target frame brightness value of the image;
• determine a target exposure value based on the target frame brightness value, the current frame brightness value, and the current exposure value, the current exposure value and the target exposure value relating to one or more exposure parameters;
• obtain, based on the target frame brightness value, a plurality of candidate values of the one or more exposure parameters;
• determine a weight corresponding to each of the plurality of candidate values, the weight relating to image quality of the image wherein for each of the one or more exposure parameters, the larger the candidate value is, the smaller the weight corresponding to the candidate value is;
• determine, based on the target frame brightness value, the plurality of candidate values, and the weights, a target value for each of the one or more exposure parameters from the plurality of candidate values;
• and
• adjust one or more of the at least one lens, the at least one exposure-time controller, and the at least one sensor according to the target values of the one or more exposure parameters.