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Automatic focusing method and device

An automatic focus and block technology, applied in the field of image processing

Active Publication Date: 2021-04-02
ZHEJIANG HUACHUANG VISION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present application provides an automatic focusing method and device to solve the problem of clearly focusing on the target area on an object screen with multiple depths of field

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  • Automatic focusing method and device

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Embodiment Construction

[0059] In order to make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are the Some embodiments of the technical solution, but not all embodiments. Based on the embodiments described in the application documents, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the technical solutions of the present application.

[0060] With the development of science and technology, the problem of multi-object depth of field caused by the diversity of lens magnifications is becoming more and more serious. Figure 1a As shown in the picture, the foreground in the picture is clear and the foreground is blurred, or as Figure 1b As shown, the distant view in...

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Abstract

The invention relates to the technical field of image processing, and provides an automatic focusing method and device, which are used for solving the problem of clearly focusing a target area on a multi-depth-of-field object picture; the method comprises the following steps: partitioning a current frame of image acquired by an image acquisition device, and according to the definition value of each block, obtaining a target image; determining a definition value of each block, and determining an intra-frame block weight of each block; determining an inter-frame block weight of each block on thecurrent frame image according to the definition change rate of each block on the current frame image; and finally, determining a target area on the current frame of image according to the intra-frameblock weight and the inter-frame block weight, and focusing the target area. According to the invention, the target area on the current frame of image is determined by adaptively adjusting the blockweight, and the target area is focused by selecting the proper focusing step length.

Description

[0001] This application claims the priority of a Chinese patent application filed with the Intellectual Property Office of the People's Republic of China on October 27, 2020, with the application number 202011167274.1 and the title of the invention "An automatic focusing method and device", the entire content of which is incorporated by reference In this application. technical field [0002] The present application relates to the technical field of image processing, and provides an automatic focusing method and device. Background technique [0003] In the current AF (Auto Focus) method, the focus is generally on the central area of ​​the screen or the entire screen, but the target area is not necessarily in the above area. In order to clearly focus on the target area, manual marking of the area of ​​interest is often used to increase the sensitivity The method of combining the weight of the area of ​​interest can focus on the picture. [0004] However, with the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
CPCH04N23/675
Inventor 王文龙华旭宏杨国全曹亚曦王克彦
Owner ZHEJIANG HUACHUANG VISION TECH CO LTD