Method and device for focusing camera

Abstract

The invention relates to the field of optical imaging, and discloses a method and device for focusing a camera. In the method and device for focusing the camera, the sizes, positions and priorities of two focusing windows can be set to solve errors of a lens structure, so that the searching speed and accuracy of the optimized focusing position can be improved; the step length of a motor is reduced to a clear zone in a gradient way in the focusing search, so that the focusing speed is improved; rolling focusing is carried out at least twice in a microstep speed reducing way in the clear area, so that the focusing accuracy is completed in the clearest position of an image; and focusing is started at a regular moment when the focusing is fuzzy, so that focusing is effectively ensured to be not focused once again in a scene with contrast ratio. When the optical lens is in an adaptive step length with different magnifications and corresponding settings, different focusing modes can be selected for quick focusing, so that the method can be used for effectively determining whether to start focusing and focusing direction or not in various zooms and scenes, identifying whether the image is in a fuzzy state or not and quickly finding out the clearest point.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to a method and device for focusing a camera integrated with multiple optical lenses. Background technique [0002] At present, with the improvement of people's living standards, the rapid development of electronic products, and the use of cameras are becoming more and more popular. The cameras in the prior art have the following defects: the focus is too slow when the scene changes, the focus is too high, the focus direction cannot be recognized, and the image repeatedly oscillates. The focus is blurred, the focus cannot be activated, etc. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a camera focusing method and device for the above-mentioned defects of the prior art, which solves the problem of image shaking, repeated shaking, focusing positi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a camera focusing method and device for the above-mentioned defects of the prior art, which solves the problem of image shaking, repeated shaking, focusing position not on the clearest picture, focusing too far, too slow , when the scene changes, the focus cannot be started; it can realize self-adaptive fast focus, so that the image is in a clear picture

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