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Focusing method and apparatus for mobile terminal

A technology of mobile terminal and focusing method, which is applied in the field of camera focusing, can solve the problems that the focusing speed and accuracy cannot be guaranteed, and achieve the effect of improving the focusing speed and accuracy

Inactive Publication Date: 2015-09-02
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, mobile terminals have many focusing methods, such as phase focusing, contrast focusing, laser focusing, etc., but there are some disadvantages. Phase focusing is based on phase difference, and contrast focusing is based on the The contrast between the backgrounds is used to focus; the laser focus first uses laser ranging and then focuses according to the contrast. These focusing methods need to be compared before and after focusing. Due to differences in image processors and focusing algorithms, the Focusing speed and accuracy cannot be guaranteed

Method used

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  • Focusing method and apparatus for mobile terminal
  • Focusing method and apparatus for mobile terminal
  • Focusing method and apparatus for mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] figure 1 It is a flow chart of a mobile terminal focusing method provided by Embodiment 1 of the present invention. This embodiment is applicable to fast focusing when using a mobile terminal to take pictures. This method can be executed by a mobile terminal, and specifically includes the following steps:

[0047] Step 110, measure the distance between the camera and the object currently to be photographed by the camera of the mobile terminal.

[0048] When using the camera function of the mobile terminal to take pictures of an object, the user first turns on the camera function of the mobile terminal, and points the camera of the mobile terminal at the object to be photographed. After the mobile terminal starts the camera function according to the user's instruction, it uses a ranging sensor (such as an ultrasonic ranging sensor, a laser ranging sensor or an infrared ranging sensor, etc.) to measure the distance between the object currently to be photographed by the mo...

Embodiment 2

[0056] figure 2 It is a flowchart of a focusing method for a mobile terminal provided in Embodiment 2 of the present invention, specifically including the following steps:

[0057] Step 210, emit infrared light through the infrared laser device, and record the time when the infrared laser device emits the infrared light as the first time.

[0058] Wherein, the infrared laser device includes a transmitting device and a receiving device; the transmitting device is used for emitting infrared light; the receiving device is used for receiving the reflected infrared light. The infrared laser device is located in the focusing system of the mobile terminal, that is, close to the camera.

[0059]After starting the camera function, the mobile terminal emits infrared light through the emitting device of the infrared laser device, and records the time of emitting the infrared light, which is recorded as the first time.

[0060] Step 220: Receive the reflected infrared light after the i...

Embodiment 3

[0067] image 3 It is a flowchart of a focusing method for a mobile terminal provided in Embodiment 3 of the present invention, specifically including the following steps:

[0068] Step 310, when focusing the camera module of the mobile terminal, record the corresponding relationship between the object distance at the focus position and the position of the focus motor.

[0069] When adjusting the focus of the camera module of the mobile terminal, record the corresponding relationship between the object distance of each focus position and the position of the focus motor, "X" indicates the object distance of each focus position, and "Y" indicates the corresponding focus motor position.

[0070] For example: when the object distance is X1, when the lens is focused at the focus position, the corresponding focus motor position is Y1;

[0071] When the object distance is X2, when the lens focuses on the focus position, the corresponding focus motor position is Y2;

[0072] When th...

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Abstract

The invention discloses a focusing method and an apparatus for a mobile terminal. The method includes: measuring the distance between an object which is currently needed to be shot by a camera of the mobile terminal and the camera; and driving a focusing motor to the position of a focus according to the distance between the object in need of being shot and the camera and a preset corresponding relation between an object distance and the position of the focusing motor. According to the focusing method and the apparatus for the mobile terminal, the focusing motor can be directly driven to the position of the focus according to the preset corresponding relation between the object distance and the position of the focusing motor, and the focusing speed and the accuracy of the mobile terminal are improved.

Description

technical field [0001] Embodiments of the present invention relate to a camera focusing technology, and in particular to a focusing method and device for a mobile terminal. Background technique [0002] With the development of smart mobile terminals, mobile terminals are more and more widely used, and the camera function has become an essential and important function of the mobile terminal. [0003] In the prior art, mobile terminals have many focusing methods, such as phase focusing, contrast focusing, laser focusing, etc., but there are some shortcomings. Phase focusing is based on phase difference, and contrast focusing is based on objects and The contrast between the backgrounds is used to focus; the laser focus first uses laser ranging and then focuses according to the contrast. These focusing methods need to be compared before and after focusing. Due to the difference in image processors and focusing algorithms, the Focusing speed and accuracy cannot be guaranteed. ...

Claims

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Application Information

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IPC IPC(8): H04N5/232
Inventor 彭植远胡铂
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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