A highly efficient auto focus method and system

By selecting focus points at fixed intervals and processing the blur kernel matrix, the problem of low clear image generation rate in the imaging module of the autofocus system is solved, achieving efficient image detection and improving the detection efficiency of the focusing device.

CN121603779BActive Publication Date: 2026-05-01HEFEI I TEK OPTOELECTRONICS CO LTD
4 Cites 0 Cited by

Patent Information

Application Number
CN202610107866.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-27
Publication Date
2026-05-01
Estimated Expiration
2046-01-27

AI Technical Summary

Technical Problem

In high-speed detection scenarios, existing autofocus systems suffer from limitations in detection efficiency because the rate at which the imaging module generates a clear image is lower than the rate at which the autofocus module detects the defocusing amount. This is especially true in off-axis autofocus systems, where the lag in objective lens focus movement prevents real-time focusing on all measurement points, resulting in blurred images.

Method used

The height values ​​of multiple measurement points are detected by the ranging module, and the focus points with fixed intervals are selected. The height of the objective lens focus is adjusted at a constant speed based on the height difference between adjacent focus points so that it coincides with the focus point position. The image is then deblurred using a blur kernel matrix to generate a clear image.

Benefits of technology

The detection efficiency of the autofocus device has been improved, making the rate of generating clear images basically consistent with the rate of height value detection, thus improving real-time focusing performance and ensuring that the image at each measurement point is clear.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application discloses a high-efficiency automatic focusing method and system, and relates to the field of automatic focusing. The method is applied to an off-axis automatic focusing device comprising a ranging module and an imaging module, and comprises the following steps: detecting height values of multiple measuring points by using the ranging module, and screening fixed-interval focusing points; based on a first height difference between adjacent focusing points, adjusting the height of an objective lens focal point in the imaging module at a constant speed, so that the height of the objective lens focal point is consistent with the horizontal plane position of the focusing point; when the horizontal plane position of the objective lens focal point coincides with that of any correction point, determining a corresponding blur kernel matrix according to a second height difference between the objective lens focal point and the correction point; and based on the blur kernel matrix, performing deblurring processing on an image generated by an image sensor to obtain a measured object image. Based on the above processing, the image blurring problem caused by poor real-time focusing performance is improved, and the detection rate of the automatic focusing device is improved.
Need to check novelty before this filing date? Find Prior Art