Automatic focusing method and apparatus and mobile terminal

Abstract

The embodiment of the invention discloses an automatic focusing method and apparatus and a mobile terminal. The method includes that when a focusing event is triggered, and determining a first spot light source determining condition if a camera is detected to be on a first position, wherein the first position is the corresponding position where the surface of the camera faces downwards and the and included angle between the surface of the camera and the vertical surface exceeds a preset angle threshold, the first spot light source determining condition is less restrict than a second spot light source determining condition, and the second spot light source is located at the position outside the first position with respect to the camera. The method further includes determining whether the current shot objected is a spot light source according to the first spot light source determining condition, and executing corresponding focusing operation according to the determining result. When the technical scheme is adopted, the determination process of the mobile terminal on whether a shot object is a spot light source in an automatic focusing process is optimized, focusing accuracy is ensured, defocusing phenomenon is prevented, and the user experience is improved.

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 constantly change the lens position, and the image sensor will obtain the focus value (FocusValue, 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 f...

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)

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