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Focusing method and mobile terminal

A mobile terminal and focusing method technology, applied in the field of communication, can solve the problems of slow image data speed, phase focusing cannot support all areas, and low phase focusing accuracy, etc.

Active Publication Date: 2017-01-11
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a focusing method and a mobile terminal to solve the problems that phase focusing cannot support all areas, the precision of phase focusing is low, and the speed of continuous output of image data is slow

Method used

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  • Focusing method and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0023] refer to figure 1 , which shows a flowchart of a focusing method according to Embodiment 1 of the present invention, which may specifically include the following steps:

[0024] Step 101 , during the process of capturing a preview image by the second camera, first focus data of the first camera is acquired.

[0025] Phase focusing (English: Phase Detection Auto Focus, referred to as: PDAF) refers to reserving some pixels for focusing on the photosensitive element, which are specially used for phase detection, and the distance between pixels and its changes can be used to detect A focusing method that determines the offset value of the focus to achieve accurate focus. Generally speaking, pixels for focusing are mainly set in the central area of ​​the imaging area, and less are set in some areas away from the central area.

[0026] In the embodiment of the present invention, the mobile terminal is configured with two cameras, wherein the first camera is specially used f...

no. 2 example

[0040] refer to figure 2 , which shows a flowchart of a focusing method according to Embodiment 2 of the present invention, which may specifically include the following steps:

[0041] Step 201 , during the process of capturing preview images by the second camera, receiving a selection operation of a preset focus area on an image preview interface of the second camera by the user of the mobile terminal.

[0042] The mobile terminal can monitor the selection operation performed by the user on the image preview interface of the second camera, and the position selected by the received selection operation is the target position to be focused on.

[0043] In the embodiment of the present invention, the preset focus area includes an area within a preset range away from the center of the image preview interface in the image preview interface, wherein the area within a preset range away from the center of the image preview interface It refers to the area on the camera that does not ...

no. 3 example

[0055] image 3 It is a block diagram of a mobile terminal according to Embodiment 3 of the present invention. image 3 The mobile terminal 300 shown includes a focus acquisition module 301 and a focus data conversion module 302 .

[0056] A focusing result acquisition module 301, configured to acquire a first focusing result of phase focusing performed by the first camera;

[0057] A focus data conversion module 302, configured to convert the first focus result into a second focus result of the second camera, where the focus pixels of the first camera are more than the focus pixels of the second camera;

[0058] exist image 3 On the basis of , optionally, the mobile terminal 300 also includes: an image generation module 303, see Figure 4 .

[0059] The image generation module 303 is configured to convert the first focus result into the second focus result according to the positional relationship between the first camera and the second camera.

[0060] Optionally, the f...

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Abstract

The embodiment of the invention provides a focusing method and a mobile terminal. The method is applied to the mobile terminal having a first camera and a second camera. The method comprises the steps of acquiring first focusing data of the first camera during a preview image collection process of the second camera; and converting the first focusing data into the second focusing data, and arranging the data into the second camera, wherein the number of pixel points used for focusing in the first camera is more than that of the pixel points used for focusing in the second camera. According to the method and the mobile terminal provided by the embodiment of the invention, the problem that a part of area cannot support phase focusing as the part of area lacks of the focusing pixel points is solved while imaging quality is not reduced, and accuracy of phase focusing is improved; when no-delay photographing or picture recording is performed, no-delay photographing speed and focusing speed in picture recording when a focus changes are improved, and thus the picture recording effect when the focus changes becomes better.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a focusing method and a mobile terminal. Background technique [0002] At present, the focus methods used in mobile phone cameras mainly include contrast focus and phase focus. Contrast focusing is more accurate, but the speed is too slow; phase focusing is fast, but some pixels for focusing need to be reserved on the photosensitive element for phase detection. The pixels used for focusing on the photosensitive element will cause a certain loss in image quality, and in order to reduce the loss of image quality, there cannot be too many pixels used for focusing. In order to ensure the image quality, the number of pixels used for focusing should not be too many, which not only affects the accuracy of phase focusing, but also causes the pixels used for focusing to be placed in the subject area, resulting in the failure of phase focusing in some a...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04M1/725H04M1/72403
CPCH04M2250/52H04M1/72403H04N23/67
Inventor 殷求明
Owner VIVO MOBILE COMM CO LTD
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