Automatic focusing method, device and system for lens

An automatic focus and lens technology, which is applied to focusing devices, TV system components, installation, etc., can solve problems such as SFR method failure, photosensitive image blur, and inability to achieve lens focus, so as to improve reliability and efficiency. Effect

Active Publication Date: 2021-07-27
GEER TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the SFR method has relatively high requirements on the photosensitive image. If the initial position of the lens is not good

Method used

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  • Automatic focusing method, device and system for lens
  • Automatic focusing method, device and system for lens
  • Automatic focusing method, device and system for lens

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Embodiment Construction

[0073] The core of the present invention is to provide a lens automatic focusing method, device and system, which improves the reliability and efficiency of the lens automatic focusing.

[0074] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0075] Please refer to figure 1 , figure 1 It is a process flow chart of an automatic focusing method of a lens provided by the present invention.

[007...

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Abstract

The invention discloses an automatic focusing method, device and system for a lens, and the method comprises the steps of obtaining a first photosensitive image obtained after the lens shoots a focusing graphic card after determining a first focusing rotation direction of the lens and switching to a first mode, obtaining the definition of the first photosensitive image, and if the definition is smaller than a preset definition threshold value, indicating that the first photosensitive image is clear, an SFR method can be switched to carry out fine adjustment on the lens so as to find the first optimal position of the lens in the first mode, and the automatic focusing of the lens is realized; and if the definition is not smaller than the preset definition threshold value, indicating that the first photosensitive image is still not clear and does not meet the processing requirement of the SFR method, and the lens is rotated by a first stepping angle according to the first focusing rotation direction so as to carry out coarse adjustment on the lens. According to the invention, the lens is roughly adjusted based on the definition, and when the definition requirement is met, the SFR method is switched to carry out fine adjustment on the lens, so that the reliability and efficiency of automatic focusing of the lens are improved.

Description

technical field [0001] The invention relates to the technical field of optical components, in particular to an automatic focusing method, device and system for a lens. Background technique [0002] In the production process of the camera, it is usually necessary to focus the lens of the camera. Focusing is to adjust the distance between the lens in the camera and the photosensitive sensor, and the purpose is to adjust the distance between the lens and the photosensitive sensor to an optimal distance. , the position of the lens at this time is also called the best position. [0003] In the prior art, an SFR (Spatial frequency response, spatial frequency response) method is usually used to adjust the focus of the lens. Specifically, the camera takes pictures of the chart card placed in front of it, and obtains the photosensitive image based on the data collected by the photosensitive sensor, and then processes the photosensitive image based on the SFR method to obtain the MTF...

Claims

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Application Information

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IPC IPC(8): G03B13/36G02B7/36H04N5/232
CPCG03B13/36G02B7/36H04N23/675H04N23/67
Inventor 盖增园迟小羽孙昱祖
Owner GEER TECH CO LTD
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