Contrast type focusing method and device and electronic equipment

A technology of contrast focusing and focal length, which is applied to TVs, electrical components, color TVs, etc., and can solve the problems of severe camera preview image shaking and slow focusing speed.

Inactive Publication Date: 2019-10-15
XIAMEN MEITUZHIJIA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Contrast focusing is widely used in the focusing of mobile terminals such as cameras, mobile phones, and tablets. At present, most of the mobile terminal cameras mainly have the problems of slow focusing speed and severe jitter in the camera preview screen when focusing.

Method used

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  • Contrast type focusing method and device and electronic equipment
  • Contrast type focusing method and device and electronic equipment
  • Contrast type focusing method and device and electronic equipment

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Embodiment Construction

[0053] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0054] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in t...

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Abstract

The embodiment of the invention provides a contrast type focusing method and device and electronic equipment, and relates to the technical field of imaging. The method comprises the following steps of: determining the displacement step length of a driving motor according to the relationship between each object distance in a plurality of different object distances of a focusing target and a corresponding image distance; then, obtaining the current position of the lens, and determining the initial position of focusing according to the current position; and finally, controlling the driving motorto push the lens from the initial position according to the displacement step length, and finishing focusing when it is determined that the lens is located at the focus point and the state is a stablestate. Thus, different displacement steps are set according to the relationship between different object distances and image distances, the focusing search time is reduced on the premise of ensuringthe focusing success rate and the focusing precision, and meanwhile, the problem of violent shaking of a preview image during focusing is relieved by setting the initial position of focusing.

Description

technical field [0001] The present application relates to the field of imaging technology, in particular, to a contrast focusing method, device and electronic equipment. Background technique [0002] The process of focusing is to achieve the clearest image in the focus area by moving the lens. When the image clarity is the best, the contrast is the largest and the aberration is the smallest. Contrast focusing is to find the focus area with the largest contrast. The point at which the focus is accurate is also called the focal point. [0003] Contrast focusing is widely used in the focusing of mobile terminals such as cameras, mobile phones, and tablets. At present, most mobile terminal cameras mainly have the problems of slow focusing speed and severe jitter in the camera preview screen when focusing. Contents of the invention [0004] Based on the above problems, the embodiments of the present application provide a contrast focusing method, device and electronic equipmen...

Claims

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Application Information

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IPC IPC(8): H04N5/232
CPCH04N23/67
Inventor 林奇周凡张长定李骈臻张伟
Owner XIAMEN MEITUZHIJIA TECH
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