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Focusing method and device

A technology of focusing method and focusing value, which is applied in the field of photography and can solve problems such as inability to focus on the subject

Inactive Publication Date: 2017-02-15
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the embodiments of the present invention provide a focusing method and device to solve the technical problem in the prior art that the subject that the user expects cannot be focused

Method used

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  • Focusing method and device

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Experimental program
Comparison scheme
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Embodiment 1

[0024] figure 1 It is a schematic flow chart of a focusing method provided in Embodiment 1 of the present invention, and the method in this embodiment is applicable to the case where a photographing device focuses on a subject to be photographed. It can be performed by a focusing device, which can be realized by means of hardware and / or software, and can generally be applied to a photographing device. The photographing device can include: a camera, a video camera, a mobile phone with a camera function, a tablet computer, a PDA Wait.

[0025] see figure 1 , the focusing method includes:

[0026] S110. When an event of adjusting the focal length interval is triggered, move the lens to the focal length interval pointed to by the event.

[0027] Focusing refers to the process of changing the object distance and distance to make the image of the subject clear. Usually can be divided into automatic focus, manual focus and multiple focus methods. The focal length refers to the d...

Embodiment 2

[0034] figure 2 It is a schematic flowchart of the focusing method provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiments. In this embodiment, the definition reference value is specifically optimized as: focus value; correspondingly, the definition of each frame preview image is calculated according to the preview image The specific optimization is as follows: calculating the focus value of the preview image according to the contrast and brightness of the preset area of ​​the preview image and the contrast and brightness of the preset area of ​​the previous frame adjacent to the preview image.

[0035] Correspondingly, the focusing method provided in this embodiment includes:

[0036] S210. When an event of adjusting the focal length interval is triggered, move the lens to the focal length interval pointed to by the event.

[0037] S220. Adjust the focal length from the end point of the focal length in...

Embodiment 3

[0045] image 3 It is a schematic flowchart of the focusing method provided by Embodiment 3 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiments. In this embodiment, the following steps are added: acquiring the imaging image corresponding to the focal length of the maximum definition reference value; image.

[0046] Correspondingly, the focusing method provided in this embodiment includes:

[0047] S310. When the focus adjustment interval event is triggered, adjust the focus to the focus interval pointed to by the event.

[0048] S320. Acquire a preview image corresponding to each preset position in the focal length interval, and calculate a sharpness reference value of each frame of the preview image according to the preview image.

[0049] S330. Adjust the focal length to the focal length corresponding to the maximum definition reference value, and acquire an imaging image with the focal length corresponding to the maximum...

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Abstract

The embodiment of the invention discloses a focusing method and device. The focusing method comprises the steps of adjusting a focal length to a focal length range pointed by an event when adjusting event trigger of the focal length range; acquiring a preview image corresponding to each preset position within the focal length range, and calculating a definition reference value of the preview image per frame according to the preview image; and adjusting the focal length to a focal length corresponding to the maximum definition reference value. The focusing method and the focusing device provided by the invention can realize focusing according to a focal length space selected by a user, and can focus on a desired theme of the user.

Description

technical field [0001] The present invention relates to the technical field of imaging, in particular to a focusing method and device. Background technique [0002] In the process of image shooting, the distance between the camera or video camera and the object is often changed, so the image is often blurred due to exceeding the depth of field range. In order to keep the image clear, it is necessary to change the focus position of the lens during the viewfinder process to keep the image clear. This process of adjusting the focus position is called focusing or focusing. [0003] Autofocus technology has been widely used in imaging fields such as cameras, video cameras, and image scanning. It enables the imaging system to automatically adjust the position of the focusing lens in the lens according to the distance of the object, so that the object is clearly imaged on the imaging plane. There are many kinds of autofocus methods in traditional optical imaging systems, which c...

Claims

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Application Information

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IPC IPC(8): H04N5/232
CPCH04N23/67
Inventor 高灵波徐彭飞
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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