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A fast focusing method, device and mobile terminal

A focusing method and technology of a focusing device, which are applied to TVs, color TV parts, TV system parts, etc., can solve the problems of low camera frame rate, unreliable phase detection, slow search speed, etc., and achieve fast focusing Effect

Active Publication Date: 2019-03-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because phase detection focusing only uses half of the pixels on the left or right of some pixels, it will lead to unreliable phase detection in low light, so contrast focus is often used in low light
[0004] However, the frame rate of the camera is relatively low in low light. At this time, the search speed of contrast focus will be very slow, and the overall focus experience is not good.

Method used

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  • A fast focusing method, device and mobile terminal
  • A fast focusing method, device and mobile terminal
  • A fast focusing method, device and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 This is a flow chart of the fast focusing method provided in the first embodiment of the present invention. This embodiment is applicable to the situation where a mobile terminal camera performs focusing. The method can be executed by a mobile terminal with a camera function. The mobile terminal can be a smart phone or a tablet. Computer, etc., the method specifically includes the following steps:

[0026] S110: When a focus instruction is received, acquire a first brightness value and a first focus parameter.

[0027] Wherein, the first brightness value is the brightness value before the fill light is turned on. After the user starts the camera function of the mobile terminal, the screen of the mobile terminal displays the image obtained by the camera, and the user can select the focus in the image by clicking. After receiving the click operation, the mobile terminal triggers a focus instruction.

[0028] When the user triggers the focus instruction, the mobile ter...

Embodiment 2

[0042] figure 2 This is a flowchart of the fast focusing method provided in the second embodiment of the present invention. As a further description of the first embodiment, S110. When a focusing instruction is received, acquiring the first brightness can be implemented in the following manner:

[0043] S111. Acquire the ambient light brightness when the focus instruction is received.

[0044] The ambient light brightness can obtain the light intensity signal through the photosensitive sensor, and install the light intensity signal as the brightness value.

[0045] S112: If the ambient light brightness is less than a preset brightness threshold, obtain the first brightness.

[0046] Exemplarily, the preset brightness threshold is greater than 10 Lux and less than 80 Lux, preferably 50 Lux. After obtaining the ambient light brightness, it is determined whether the ambient light brightness is less than a preset brightness threshold. If the ambient light brightness is less than the pre...

Embodiment 3

[0062] image 3 It is a schematic structural diagram of a fast focusing device 1 provided in the third embodiment of the present invention. The fast focusing device 1 is located in a mobile terminal with a camera function. A fast focusing device 1, including:

[0063] The brightness obtaining unit 11 is configured to obtain a first brightness value when a focus instruction is received, where the first brightness value is the brightness value before the fill light is turned on;

[0064] The calculation unit 12 is configured to determine the first focus parameter according to when the focus instruction is received;

[0065] The fill light control unit 13 is used to turn on the fill light;

[0066] The calculation unit 12 is further configured to determine a second focus parameter according to the first brightness value, the first focus parameter, the second brightness value, and the preset fill light brightness value, and the second brightness value is on The brightness value after the...

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Abstract

The invention discloses a fast focusing method, device and mobile terminal. A fast focusing method, comprising: when a focus command is received, acquiring a first brightness value and a first focusing parameter, the first brightness value being the brightness value before turning on the fill light; turning on the fill light; according to the The first brightness value, the first focus parameter, the second brightness value, and the preset fill light brightness value determine the second focus parameter, and the second brightness value is the brightness value after the fill light is turned on; according to the first brightness value Two focus parameters to focus. The invention can enhance the brightness through a supplementary light before focusing, and then focus in an environment with increased brightness, so as to realize fast focusing in a low-light environment.

Description

Technical field [0001] The embodiments of the present invention relate to mobile terminal photographing technology, and in particular to a fast focusing method, device and mobile terminal. Background technique [0002] With the development of electronic equipment, terminals such as smart phones can take pictures through the configured camera. When taking a picture, the mobile phone camera first focuses, and after focusing, the user performs a picture taking operation through the camera button. [0003] Currently, mobile phone cameras use phase detection to focus in order to increase the focusing speed. However, since phase detection focusing only uses half of the pixels to the left or right of some pixels, it will lead to unreliable phase detection in low light, so contrast focusing is often used in low light. [0004] However, the frame rate of the camera in low light is relatively low. At this time, the search speed using contrast focus will be very slow, and the overall focus ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232H04N5/235
CPCH04N23/67H04N23/74
Inventor 卓世杰
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD