Focusing method and terminal

A mobile terminal, comprising:

• a processor;
• a camera module;
• a camera driving device;
• a memory;
• and
• one or more programs;
• the one or more programs being stored in the memory and configured to be executed by the processor;
• the one or more programs comprising instructions configured to:
• obtain a set of focus value (FV) sampling parameter groups and a set of phase difference defocus value sampling parameter groups;
• determine a first mapping relation between step angles and FVs according to the set of FV sampling parameter groups and a first predetermined fitting scheme, and determine a second mapping relation between the step angles and defocus values according to the set of defocus value sampling parameter groups and a second predetermined fitting scheme, the step angles being step angles of the camera driving device of the camera module;
• determine a first step angle in a first step angle set according to the first mapping relation, and determine a second step angle in a second step angle set according to the second mapping relation, an FV corresponding to the first step angle being maximum among FVs respectively corresponding to step angles in the first step angle set, and a defocus value corresponding to the second step angle being zero;
• and
• complete focusing according to the first step angle and the second step angle.

A computer-readable storage medium storing computer programs for electronic data interchange, the computer programs causing a computer to:

• obtain a set of focus value (FV) sampling parameter groups and a set of phase difference defocus value sampling parameter groups;
• determine a first mapping relation between step angles and FVs according to the set of FV sampling parameter groups and a first predetermined fitting scheme, and determine a second mapping relation between the step angles and defocus values according to the set of defocus value sampling parameter groups and a second predetermined fitting scheme, the step angles being step angles of a camera driving device of a camera module;
• determine a first step angle in a first step angle set according to the first mapping relation, and determine a second step angle in a second step angle set according to the second mapping relation, an FV corresponding to the first step angle being maximum among FVs respectively corresponding to step angles in the first step angle set, and a defocus value corresponding to the second step angle being zero;
• and
• complete focusing according to the first step angle and the second step angle.