An automatic focusing method, device and mobile terminal

Abstract

The embodiment of the invention discloses an automatic focusing method, device and mobile terminal. The method includes: when the focus event is triggered, if it is detected that the camera is at a first position, determining a first point light source determination condition, wherein the first position is that the surface of the camera faces downward and the included angle with the vertical plane exceeds a preset For the position corresponding to the angle threshold, the first point light source judgment condition is stricter than the second point light source judgment condition, and the second point light source judgment condition corresponds to a position where the camera is outside the first position; judge according to the first point light source judgment condition Whether the current subject is a point light source, and perform corresponding focusing operations according to the judgment result. By adopting the above technical solution, the embodiment of the present invention optimizes the mobile terminal's method of judging whether the object is a point light source during the autofocus process, ensures the accuracy of focusing, prevents out-of-focus phenomena, and improves user experience.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of photographing, and in particular to an autofocus method, device, and mobile terminal. Background technique [0002] With the rapid development of mobile terminal photography technology, users more and more frequently use mobile terminals to take pictures, so as to conveniently record the scenery and wonderful moments around them. [0003] At present, most of the cameras of mobile terminals support an auto-focus function, so that users can easily take clear photos. During the autofocus process, the motor in the camera will continuously change the lens position, and the image sensor will obtain the focus value (Focus Value, FV) of the subject image corresponding to different lens positions according to the collected information (which can be understood as Contrast), and the lens position when the focus value peaks corresponds to the final focus point. However, when the subject in the...

AI Technical Summary

Problems solved by technology

However, when the subject in the focus area is a point light source, the focus point determined by the above method is not accurate, resulting in out of focus, so when it is judged that the subject is a point light source, it is necessary to focus on the point The light source is processed to ensure accurate focus

[0004] When users use mobile terminals to take pictures, they often encounter the reflection of the subject. At this time, the subject is likely to be misidentified as a point light source

Especially when the user uses a mobile terminal to shoot down to a certain scene, the subject is likely to reflect light from light sources in other directions, and then be misidentified as a point light source. At this time, the mobile terminal will focus on the The reflective subject is subjected to point light source related processing, resulting in inaccurate focus (out of focus)

Images