Focusing method and focusing system based on a distance sensor of mobile terminal

A focusing method based on a distance sensor of a mobile terminal, comprising:

• acquiring and storing an initial distance between a camera and an object to be shot by using the distance sensor after detecting that a shooting function of the mobile terminal has started;
• judging whether a current distance acquired by the distance sensor is equal to the initial distance;
• in response to the judging that the current distance is not equal to the initial distance, querying a correspondence table to acquire a target micro-adjustment range of the motor according to the current distance, controlling the motor to move within the target micro-adjustment range, and collecting images from the camera;
• and
• acquiring focus values of the images when the motor moves into different positions within the target micro-adjustment range, and controlling the motor to move to a position corresponding to a largest focus value of the focus values, thereby focusing the camera.

A focusing system based on a distance sensor of a mobile terminal, comprising:

• a detection and acquisition module acquiring and storing an initial distance between a camera and the object to be shot by using the distance sensor after detecting that a shooting function of the mobile terminal has started;
• a judgment module judging whether a current distance acquired by the distance sensor is equal to the initial distance;
• in response to the judgment module judging that the current distance is not equal to the initial distance, a query and image collection module querying a correspondence table to acquire the target micro-adjustment range of a motor according to the current distance, controlling the motor to move within the target micro-adjustment range, and collecting images from the camera;
• and
• an acquisition and control module acquiring focus values of the images when the motor moves into different positions within the target micro-adjustment range, and controlling the motor to move to a position corresponding to a largest focus value of the focus values, thereby focusing the camera.

A storage medium for storing a processor-executable instruction therein, wherein the processor-executable instruction is configured to cause, when executed by a processor:

• acquiring and storing an initial distance between a camera and the object to be shot by using the distance sensor after detecting that a shooting function of the mobile terminal has started;
• judging whether a current distance acquired by the distance sensor is equal to the initial distance;
• in response to the judging that the current distance is not equal to the initial distance, querying the correspondence table to acquire the target micro-adjustment range of the motor according to the current distance, controlling the motor to move within the target micro-adjustment range, and collecting images from the camera;
• and
• acquiring focus values of the images when the motor moves into different positions within the target micro-adjustment range, and controlling the motor to move to a position corresponding to a largest focus value of the focus values, thereby focusing the camera.