WO2016062083A1

WO2016062083A1 - Focusing method, device and terminal

Info

Publication number: WO2016062083A1
Application number: PCT/CN2015/079601
Authority: WO
Inventors: 陈惠智
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-10-24
Filing date: 2015-05-22
Publication date: 2016-04-28
Also published as: CN105592260A

Abstract

Disclosed are a focusing method, device and terminal. The method comprises: obtaining via a distance measuring sensor of the terminal the photographing distance of an object to be photographed in the photographing direction of the camera when the camera set up on the terminal is detected to be on; controlling the camera lens to photograph according to the photographing distance and focus on the object to be photographed. The solution of the present invention automatically controls the camera lens to focus on the object in front of the camera according to the accurate photographing distance after a user turns on the camera lens, thus avoiding user missing a shot taking opportunity due to time spent on manual focus.

Description

Focus method, device and terminal

Technical field

This article relates to the field of camera shooting, especially a focusing method, device and terminal.

Background technique

With the popularity of various social platforms, people like to share the little bit of life on Weibo and WeChat. As the performance of mobile phone hardware continues to improve, it has become the best choice to replace digital cameras. Some wonderful moments are fleeting, and if the phone can't be shot quickly, it will be missed. At present, the camera focusing method includes auto focus and manual focus. Whether it is automatic or manual, it is necessary to collect the image at the current focal length first, and adjust the focal length of the camera according to the image sharpness until the image is clear, but the focusing method takes a long time and leads to miss. The best shooting time.

Summary of the invention

The technical problem to be solved by the present invention is to provide a focusing method, a device and a terminal, which can automatically control the camera to focus on an object in front of the camera according to an accurate photographing distance after the user turns on the camera, thereby preventing the user from missing the capture due to manual focus. opportunity.

In order to solve the above technical problems, the following technical solutions are adopted:

A focusing method comprising:

After detecting that the camera provided in the terminal is turned on, obtaining a shooting distance of the shooting object in the shooting direction of the camera by using the distance measuring sensor of the terminal;

The camera is controlled to focus on the photographing object according to the photographing distance.

Optionally, the method further includes:

After the step of controlling the camera to focus on the photographing object according to the photographing distance, if the focus command input by the user is detected, the camera is controlled to refocus according to the focus command.

Optionally, the ranging sensor is an infrared ranging sensor.

Optionally, the step of obtaining, by the ranging sensor, the shooting distance of the shooting object in the shooting direction of the camera includes:

Controlling the infrared ranging sensor to emit an infrared signal to a direction in which the camera is photographed;

Obtaining a shooting distance of the photographing object according to an electrical signal generated by the infrared ranging sensor, wherein the electrical signal is when the infrared ranging sensor receives the infrared signal reflected by the photographing object The infrared ranging sensor determines a shooting distance of the photographed object according to a reflection condition of the infrared signal, and generates an electrical signal indicating the photographing distance.

Optionally, the electrical signal is that after the infrared ranging sensor receives the infrared signal reflected by the photographing object, the infrared ranging sensor will be closest according to the reflection of the infrared signal. The object in the shooting direction of the camera serves as a photographing object, and determines a photographing distance of the photographed object, and generates an electrical signal indicating the photographing distance.

Optionally, the method further includes

If the infrared ranging sensor fails to receive the reflected infrared signal, the camera is controlled to focus on the distant view.

A focusing device includes a ranging module and a focusing module, wherein:

The ranging module is configured to: after detecting that the camera provided in the terminal is turned on, obtain a shooting distance of a shooting object in a shooting direction of the camera by using a ranging sensor of the terminal;

The focusing module is configured to: control the camera to focus on the shooting object according to the shooting distance.

Optionally, the focusing module is further configured to:

After controlling the camera to focus on the object, if the focus command input by the user is detected, the camera is controlled to perform focusing again according to the focus command.

Optionally, the ranging sensor is an infrared ranging sensor.

Optionally, the ranging module includes a control submodule and a determining submodule, wherein

The control sub-module is configured to: control the infrared ranging sensor to emit an infrared signal in a shooting direction of the camera;

The determining sub-module is configured to: obtain a shooting distance of the shooting object according to the electrical signal generated by the infrared ranging sensor, wherein the electrical signal is received by the infrared ranging sensor after being reflected by the shooting object After the infrared signal, according to the reflection condition of the infrared signal, the shooting distance of the shooting object is determined, and an electrical signal representing the shooting distance is generated.

A terminal includes: a camera, a ranging sensor, and any of the above focusing devices.

A computer program comprising program instructions that, when executed by a computer, cause the computer to perform any of the above focusing methods.

A carrier carrying the computer program.

The beneficial effects of the above technical solution of the present invention are as follows:

The solution of the invention can automatically control the camera to focus on the object in front according to the accurate photographing distance after the user turns on the camera, thereby preventing the user from missing the snapping timing due to manual focus.

BRIEF abstract

1 is a schematic diagram showing the steps of a focusing method of the present invention;

2 is a schematic flow chart of performing photographing using a focusing method according to an embodiment of the present invention;

3 is a schematic structural diagram of a focusing device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram showing a partial structure of a terminal according to an embodiment of the present invention.

Preferred embodiment of the invention

The detailed description will be made below in conjunction with the accompanying drawings and specific embodiments.

An embodiment of the present invention provides a focusing method applied to a terminal. As shown in FIG. 1, the focusing method includes:

Step 11: After detecting that the camera provided in the terminal is turned on, obtaining a shooting distance of the shooting object in the shooting direction of the camera by using a distance measuring sensor of the terminal;

Step 12: Control the camera to focus on the shooting object according to the shooting distance.

According to the above description, the focus method of the embodiment can automatically control the camera to focus on the object in front of the camera according to the accurate photographing distance after the user turns on the camera, thereby preventing the user from missing the snap timing due to manual focus.

Of course, if the auto-focusing object is not the shooting shooting desired by the user, the user may re-focus according to the operation, that is, based on the above embodiment, the focusing method further includes:

Step 13: After controlling the camera to focus on the shooting object, if the focus command input by the user is detected, the camera is controlled to perform focusing again according to the focus instruction.

Specifically, as an alternative, the ranging sensor is specifically an infrared ranging sensor popularized by the current terminal.

The above step 12 specifically includes:

Step 121: Control the infrared ranging sensor to emit an infrared signal in a shooting direction of the camera; wherein, when the infrared ranging sensor receives the infrared signal reflected by the shooting object, according to the a reflection condition of the infrared signal, determining a shooting distance of the shooting object, and generating an electrical signal indicating the shooting distance;

Step 122: Obtain a shooting distance of the photographing object according to the electrical signal generated by the infrared ranging sensor.

Of course, as a feasible solution, if the infrared ranging sensor fails to obtain the reflected infrared signal, an electrical signal indicating a default shooting distance can be generated, so that the camera can focus according to a preset default shooting distance. For example, if the user wants to shoot a distant view, the infrared ranging sensor cannot detect the shooting distance of the front object normally. This method can focus by using the distance of the distant view by default.

Specifically, the infrared ranging sensor can take an object closest to the shooting direction of the camera as a photographing object according to the reflection condition of the infrared signal, and determine a photographing distance of the photographing object. In this way, when the user picks up the terminal and aligns with the photographed object, even if there is other object interference beside the photographed object, the user's photographing intention can be accurately recognized.

It should be noted that, the position of the infrared ranging sensor relative to the camera in the present invention is not fixed, and may be in any position of up, down, left, and right, considering that the measurement area of the infrared ranging sensor should be as close as possible to the center position of the camera framing. As a further alternative, the ranging sensor is disposed adjacent to a side of the camera.

The focusing method of this embodiment will be described in detail below in conjunction with a practical application.

As shown in Figure 2, the following steps are included:

S201, the user starts the mobile phone camera to view the image, and simultaneously turns on the infrared ranging sensor.

S202. The infrared ranging sensor emits an infrared signal and receives the reflected infrared signal, and converts into an electrical signal.

S303. Determine a shooting distance according to an electrical signal transmitted by the infrared sensor.

S304, adjusting the focal length of the camera according to the determined shooting distance.

S305, the user determines whether the focus result reaches the desired requirement. If yes, go to step S306; otherwise, go to step 307;

In step S306, the user selects the shooting, and the process ends.

In step 307, the user manually touches an area in the terminal screen that needs to be in focus, and performs focusing in a conventional manner. Then, it returns to step S305.

In summary, the focusing method of the present invention can automatically focus on the area in front of the camera, facilitating the user to take a quick shot.

In addition, another embodiment of the present invention further provides a focusing device, which is applied to a terminal having a shooting function, the terminal includes a ranging sensor and a camera. As shown in FIG. 3, the focusing device includes:

The 301 ranging module is configured to: after detecting that the camera is turned on, obtain a shooting distance of a shooting object in a shooting direction of the camera by using the ranging sensor;

The 302 focus module is configured to: control the camera to focus on the photographing object according to the photographing distance.

According to the above description, the focusing device of the embodiment can automatically control the camera to focus on the object in front according to the accurate photographing distance after the user turns on the camera, thereby preventing the user from missing the snapping timing due to manual focus.

After the focus module controls the camera to focus on the object, if a focus command input by the user is detected, the focus module controls the camera to perform focusing again according to the focus command.

Wherein, the ranging sensor is specifically an infrared ranging sensor.

The ranging module 301 includes:

a control sub-module, configured to: control the infrared ranging sensor to emit an infrared signal in a shooting direction of the camera; wherein, when the infrared ranging sensor receives the infrared signal reflected by the shooting object And determining, according to the reflection condition of the infrared signal, a shooting distance of the shooting object, and generating an electrical signal indicating the shooting distance;

The determining submodule is configured to obtain a shooting distance of the photographing object according to the electrical signal generated by the infrared ranging sensor.

Specifically, the infrared ranging sensor can take an object closest to the shooting direction of the camera as a photographing object according to the reflection condition of the infrared signal, and determine a photographing distance of the photographing object.

In addition, if the infrared ranging sensor is not capable of generating an electrical signal of the shooting distance, the focusing module controls the camera to focus on the distant view, for example, controlling the focusing module to perform auto focusing according to a preset distance of the shooting distance.

Further, as an alternative, the ranging sensor is disposed adjacent to a side of the camera.

Obviously, the focusing device of the present embodiment can achieve the same technical effect as the focusing method of the present invention.

In addition, another embodiment of the present invention further provides a terminal, as shown in FIG. 4, including a camera. 41 and a ranging sensor 42 (e.g., an infrared ranging sensor), the camera 41 and the ranging sensor 42 are optionally disposed together. It should be noted that FIG. 4 is only a schematic representation of the position of the camera 41 and the distance measuring sensor 42. As another implementation manner, the camera 41 and the ranging sensor 42 may also use a rear cover opening of one terminal, which will not be further described herein.

In this embodiment, the focus module 302 can be a processor of the terminal. The infrared ranging sensor emits an infrared signal and is reflected back after encountering the measured object. The infrared ranging sensor generates an electrical signal indicating the shooting distance according to the reflection condition; the electrical signal is amplified and processed and transmitted to the processor of the terminal, in the processor chip. The analog-to-digital conversion module converts the analog electrical signal into a digital signal, and converts the digital signal into a distance value according to a certain data code table; the processor chip adjusts the focal length of the camera according to the distance value, and realizes a fast shooting function.

The embodiment of the invention also discloses a computer program, comprising program instructions, which when executed by a computer, enable the computer to perform any of the above focusing methods.

The embodiment of the invention also discloses a carrier carrying the computer program.

The above is an alternative embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and retouchings without departing from the principles of the present invention. It should also be considered as the scope of protection of the present invention.

Industrial applicability

The solution of the invention can automatically control the camera to focus on the object in front according to the accurate photographing distance after the user turns on the camera, thereby preventing the user from missing the snapping timing due to manual focus. Therefore, the present invention has strong industrial applicability.

Claims

A focusing method comprising:

After detecting that the camera provided in the terminal is turned on, obtaining a shooting distance of the shooting object in the shooting direction of the camera by using the distance measuring sensor of the terminal;

The camera is controlled to focus on the photographing object according to the photographing distance.
The focusing method according to claim 1, further comprising:

After the step of controlling the camera to focus on the photographing object according to the photographing distance, if the focus command input by the user is detected, the camera is controlled to refocus according to the focus command.
The focusing method according to claim 1, wherein the ranging sensor is an infrared ranging sensor.
The focusing method according to claim 3, wherein the step of obtaining the shooting distance of the photographing object in the photographing direction of the camera by the ranging sensor comprises:

Controlling the infrared ranging sensor to emit an infrared signal to a direction in which the camera is photographed;

Obtaining a shooting distance of the photographing object according to an electrical signal generated by the infrared ranging sensor, wherein the electrical signal is when the infrared ranging sensor receives the infrared signal reflected by the photographing object The infrared ranging sensor determines a shooting distance of the photographed object according to a reflection condition of the infrared signal, and generates an electrical signal indicating the photographing distance.
The focusing method according to claim 4, wherein the electric signal is after the infrared ranging sensor receives the infrared signal reflected by the photographing object, the infrared ranging sensor according to the infrared In the case of the reflection of the signal, the object closest to the photographing direction of the camera is taken as a photographing object, and the photographing distance of the photographed object is determined, and an electric signal representing the photographing distance is generated.
The focusing method according to claim 4, further comprising

If the infrared ranging sensor fails to receive the reflected infrared signal, the camera is controlled to focus on the distant view.
A focusing device includes a ranging module and a focusing module, wherein:

The ranging module is configured to: after detecting that the camera provided in the terminal is turned on, obtain a shooting distance of a shooting object in a shooting direction of the camera by using a ranging sensor of the terminal;

The focusing module is configured to: control the camera to focus on the shooting object according to the shooting distance.
The focusing device of claim 7, wherein the focusing module is further configured to:

After controlling the camera to focus on the object, if the focus command input by the user is detected, the camera is controlled to perform focusing again according to the focus command.
The focusing device according to claim 7, wherein the ranging sensor is an infrared ranging sensor.
The focusing device of claim 9, wherein the ranging module comprises a control sub-module and a determining sub-module, wherein

The control sub-module is configured to: control the infrared ranging sensor to emit an infrared signal in a shooting direction of the camera;

The determining sub-module is configured to: obtain a shooting distance of the shooting object according to the electrical signal generated by the infrared ranging sensor, wherein the electrical signal is received by the infrared ranging sensor after being reflected by the shooting object After the infrared signal, according to the reflection condition of the infrared signal, the shooting distance of the shooting object is determined, and an electrical signal representing the shooting distance is generated.
The focusing device according to claim 9, wherein the electrical signal is after the infrared ranging sensor receives the infrared signal reflected by the photographic subject, the infrared ranging sensor according to the infrared In the case of the reflection of the signal, the object closest to the photographing direction of the camera is taken as a photographing object, and the photographing distance of the photographed object is determined, and an electric signal representing the photographing distance is generated.
A terminal comprising: a camera, a ranging sensor, and a focusing device according to any one of claims 7-12.
A computer program comprising program instructions which, when executed by a computer, cause the computer to perform the focusing method of any of claims 1-6.
A carrier carrying the computer program of claim 13.