A method for dynamically adjusting frame rate to optimize autofocus

By decomposing the focus window into multiple sub-windows and dynamic parameter adjustments, the autofocus accuracy problem under the influence of light environment in the prior art is solved, and a fast and accurate autofocus effect in different light environments is achieved.

CN113709361BActive Publication Date: 2025-03-28深圳市睿梁科技有限公司
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Patent Information

Application Number
CN202110850408.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-07-27
Publication Date
2025-03-28
Estimated Expiration
2041-07-27

AI Technical Summary

Technical Problem

The existing autofocus technology cannot quickly achieve focus in environments with good light, and cannot achieve accurate focus due to noise in environments with dim light, making it difficult to accurately focus based on the light in the current environment.

Method used

By decomposing the focus window into multiple focus subwindows, the frame rate parameters and exposure parameters of each subwindow are obtained, the confidence weighting calculation and adjustment are performed, the frame rate and exposure parameters are dynamically adjusted, and the frame synchronization motor is driven based on the acquired running parameters until autofocus is completed.

Benefits of technology

It realizes dynamic adjustment of frame rate and exposure parameters according to the current ambient light, and can quickly and accurately complete autofocus in a good and dim environment.

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Abstract

The present invention discloses a method for dynamically adjusting frame rate to optimize autofocus, which comprises the following steps: decomposing a focus window into a plurality of focus sub-windows, and obtaining a frame rate parameter and an exposure parameter of each of the focus sub-windows; performing credibility weighted calculation and adjustment on the frame rate parameter and the exposure parameter of each of the focus sub-windows to obtain an autofocus adjustment parameter set; dynamically adjusting the current frame rate parameter and the exposure parameter based on the light value of the current frame; driving an in-frame synchronous motor based on the obtained plurality of operating parameters, and obtaining focus statistics of the current frame, until all frames are processed, completing autofocus based on the calculated focus position, and being able to accurately perform autofocus according to the light of the current environment.
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