WO2018103299A1

WO2018103299A1 - Focusing method, and focusing device

Info

Publication number: WO2018103299A1
Application number: PCT/CN2017/089223
Authority: WO
Inventors: 郑亮
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-12-09
Filing date: 2017-06-20
Publication date: 2018-06-14
Also published as: CN108616685A; CN108616685B

Abstract

Disclosed in embodiments of the present invention is a focusing method, the method comprising: upon receiving a focusing instruction, controlling a reference camera among at least two cameras to focus, and acquiring the number of data points after the reference camera is in focus; determining, according to the number of the data points of the reference camera, the number of data points of a follower camera, wherein the follower camera is a camera among the at least two cameras other than the reference camera; and controlling, according to the number of the data points of the follower camera, the follower camera to focus. Also disclosed in the embodiments of the present invention is a focusing device.

Description

Focus method and focusing device

Technical field

The present application relates to, but is not limited to, the field of communications, and in particular, to a focusing method and a focusing device.

Background technique

As people in life are more and more photographed to record the bits and pieces of life, people have higher and higher requirements for taking pictures, and the application of multiple cameras has certain advantages in improving the effect of photographing.

At present, the auto-focus multi-camera module generally has a memory inside for burning some parameter information related to photographing, focusing, and the like. Under normal circumstances, the parameters of the voice coil motor of near focus and far focus will be burned. When multiple cameras are taking photos of the same scene, it is necessary to achieve fast and accurate focus. In the related art, the parameters between the cameras are strictly the same, or The focus parameters between the cameras are simply mapped, and the focus speed and focus accuracy are not satisfactory.

However, when focusing more on the camera, how to effectively and quickly increase the speed of focusing is a very challenging task.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

In view of this, the embodiments of the present invention provide a focusing method and a focusing device to achieve fast and effective focusing of a multi-camera when performing multi-camera focusing.

The technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a focusing method, where the method includes:

Receiving a focus command, controlling a reference camera of at least two cameras to perform focusing, and acquiring a data point after the reference camera is in focus;

Determining, according to the number of data points of the reference camera, the number of data points of the follow-up camera; The follower camera is a camera other than the reference camera of the at least two cameras;

The follow-up camera is controlled to perform focusing according to the number of data points of the follow-up camera.

Optionally, the method further includes:

Obtaining an environmental parameter, and determining, from the at least two cameras, a reference camera and/or a follow-up camera corresponding to the environmental parameter according to the environmental parameter.

Optionally, the method further includes:

Obtaining a photographing screen of each of the at least two cameras;

The sharpness of the photographing screen of each camera is determined, and the camera to which the sharpest photographing screen belongs is determined as the reference camera.

Optionally, the step of determining the number of data points of the follow-up camera according to the number of data points of the reference camera comprises:

Determining an object distance corresponding to the reference camera according to a relationship between a data point number of the reference camera and a focus data of the reference camera;

Determining an object distance corresponding to the following camera according to an object distance corresponding to the reference camera;

Determining the number of data points of the follow-up camera according to the object distance corresponding to the follow-up camera and the focus data relationship of the follow-up camera.

Optionally, the method further includes at least one of the following:

Setting a data point number and an object distance having a one-to-one mapping relationship to generate the focus data relationship;

A fitting curve parameter corresponding to the fitting curve relationship is set, and the focus data relationship is generated according to the fitting curve parameter and the fitting curve relationship.

The application further provides a computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.

In order to achieve the above method, an embodiment of the present invention further provides a focusing device, the device comprising: at least two camera units, the device further comprising: a reference focusing unit, a data acquiring unit, and a follow-up focusing unit;

The reference focusing unit is configured to control a reference imaging unit of the at least two imaging units to perform focusing when receiving a focus instruction, and acquire data points after the reference imaging unit is in focus number;

The data acquisition unit is configured to determine the number of data points of the following imaging unit according to the number of data points of the reference imaging unit; wherein the following imaging unit is other than the reference imaging unit of the at least two imaging units Camera unit

The follow-up focusing unit is configured to control the follow-up imaging unit to perform focusing according to the number of data points of the following imaging unit.

Optionally, the device further includes: a first reference determining unit, where the first reference determining unit is configured to:

Obtaining an environment parameter, and determining, from the at least two camera units, a reference camera unit and/or a follow-up camera unit corresponding to the environment parameter according to the environment parameter.

Optionally, the device further includes: a second reference determining unit, where the second reference determining unit is configured to:

Obtaining a photographing screen of each of the at least two camera units;

The sharpness of the photographing screen of each imaging unit is determined, and the imaging unit to which the highest-definition photographing screen belongs is determined as the reference camera.

Optionally, the data obtaining unit is configured to:

Determining an object distance corresponding to the reference camera unit according to a relationship between a data point number of the reference camera unit and a focus data relationship of the reference camera unit;

Determining an object distance corresponding to the following camera unit according to an object distance corresponding to the reference camera unit;

Determining the number of data points of the follow-up imaging unit according to the object distance corresponding to the following imaging unit and the focus data relationship of the following imaging unit.

The embodiment of the invention further provides a focusing device, the device comprising: a controller, a reference camera module and a follow-up camera module; wherein the follow-up camera module is at least two camera modules except the reference a camera module other than the camera module;

The controller is configured to: when the focus command is received, control the reference camera module to perform focusing, and obtain the number of data points after the reference camera module is in focus; and determine the number according to the data points of the reference camera module. The number of data points of the follow-up camera module;

The follow-up camera module is configured to perform focusing according to the number of data points of the following camera module.

Optionally, the device further includes: a sensor;

The sensor is configured to acquire an environmental parameter, and send the environmental parameter to the controller;

The controller is configured to determine a reference camera module and/or a follow-up camera module corresponding to the environment parameter from the at least two camera modules according to an environmental parameter.

Optionally, the controller is further configured to:

Obtaining a shooting image of each of the at least two camera modules;

Determining the sharpness of the captured image of each camera module, and determining the camera module to which the highest-resolution captured image belongs is the reference camera module.

Optionally, the reference camera module includes a reference voice coil motor and a reference lens; the following camera module includes a follower voice coil motor and a follower lens;

The controller determines the number of data points of the following camera module according to the number of data points of the reference camera module in the following manner:

Determining an object distance corresponding to the reference lens according to a relationship between a data point number of the reference voice coil motor and a focus data of the reference camera module;

Determining an object distance corresponding to the following lens according to an object distance corresponding to the reference lens;

Determining the number of data points of the follower voice coil motor according to the object distance corresponding to the following lens and the focus data relationship of the following camera module.

The embodiment of the present invention provides a focusing method and a focusing device. The method includes: when receiving a focus command, controlling a reference camera of at least two cameras to perform focusing, and acquiring data points after focusing of the reference camera; Determining the number of data points of the follow-up camera by the number of data points of the reference camera; wherein the follow-up camera is a camera other than the reference camera of at least two cameras; controlling the follow-up according to the number of data points of the follow-up camera The camera focuses. Therefore, according to the number of data points after the reference camera is focused, the number of data points of the remaining follow-up cameras is determined, and the number of data points of each camera is used to control each camera to focus, thereby effectively improving the focusing speed of the multi-camera and the accuracy of focusing, thereby realizing between multiple cameras. Fast and effective focus.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a focusing method according to Embodiment 1 of the present invention;

2 is a schematic diagram showing a relationship between an object distance and a moving distance of a lens according to Embodiment 2 of the present invention;

3 is a schematic diagram showing a relationship between a moving distance of a lens and a number of data points according to Embodiment 2 of the present invention;

4 is a flowchart of a four focus method according to Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram 1 of a focusing device according to Embodiment 4 of the present invention; FIG.

6 is a second schematic structural diagram of a focusing device according to Embodiment 4 of the present invention;

FIG. 7 is a schematic structural diagram 1 of a focusing device according to Embodiment 5 of the present invention; FIG.

FIG. 8 is a second schematic structural diagram of a focusing device according to Embodiment 5 of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a focusing device according to Embodiment 6 of the present invention.

Embodiments of the invention

In various embodiments of the present invention, when receiving the focus command, controlling a reference camera of the at least two cameras to perform focusing, and acquiring a data point after the reference camera is focused; determining, according to the number of data points of the reference camera The number of data points of the moving camera; wherein the follow-up camera is a camera other than the reference camera of at least two cameras; and the follow-up camera is controlled to perform focusing according to the number of data points of the follow-up camera.

The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.

Embodiment 1

A first embodiment of the present invention provides a focusing method applied to a terminal having at least two cameras. As shown in FIG. 1, the method includes:

S101. When receiving the focus command, control a reference camera of the at least two cameras to perform focusing, and obtain a data point number after the reference camera is in focus;

When the terminal receives the photographing operation or the focusing operation of the user, generating a focus command, acquiring a reference camera of at least two cameras in the terminal to perform focusing and acquiring data points after focusing based on the focus instruction, where the number of data points is in the camera The parameters of the drive output of the voice coil motor, In order to control the moving distance of the lens of the camera, when controlling the moving distance of the lens, it includes controlling the linear motion of the lens and the motion with the swing angle, thereby controlling the linear and angular displacement of the camera.

Before obtaining the data points of the reference camera, the reference camera is determined, and one of the at least two cameras can be determined in advance as the reference camera, and the reference camera can also be determined according to the environmental parameters or the shooting pictures of the cameras.

Here, when one of the at least two cameras is predetermined as the reference camera, the designated camera may be preset as the reference camera, or the first camera to be activated may be used as the reference camera.

In the selection of the reference camera, when any camera has been clearly focused on the focus, the camera can be selected as the reference camera. At this time, it is not necessary to open all the cameras at the same time, and then select from several, thereby saving the reference camera. Choose time and power consumption.

Optionally, when focusing, you can select any camera to focus, or specify a camera to start focusing. When the selected camera is the clearest, use the camera as a reference camera, and then start other cameras to focus. At this time, the camera does not control any movement, and the number of data points or the object distance of each camera is maintained at the state when the focus command is received. When the focus command is received, the number of data points or the object distance of each camera is kept the same. At this point, the reference camera is already at the sharpest point of focus, no need to refocus or additional adjustments.

When determining the reference camera according to the environmental parameter, the method further includes: acquiring an environmental parameter, and determining, from the at least two cameras, a reference camera and/or a follow-up camera corresponding to the environmental parameter according to the environmental parameter. The environmental parameters may include parameters such as light intensity, temperature, and humidity. Taking the environmental parameter as the light intensity and the terminal having the camera 1 and the camera 2 as an example, when the value of the acquired light intensity is relatively large, indicating that the current terminal is in a strong light environment, the camera 1 is selected as the reference camera; when the acquired light is obtained When the value of the intensity is relatively small, indicating that the current terminal is in a low light environment, the camera 2 is selected as the reference camera. Here, the specific correspondence between the corresponding reference cameras selected according to the specific environmental parameters may be set according to requirements.

When determining the reference camera according to the photographing screen of each camera, the method further includes: acquiring a photographing screen of each of the at least two cameras; determining a sharpness of the photographing screen of each camera, and setting a photographing screen with the highest definition The associated camera is determined as the reference camera.

Here, it is not determined which of the plurality of cameras is a reference photo before focusing. In the image head, when the focus is performed, the image capturing screens of the respective cameras are acquired, the screen images of the respective camera images are analyzed, the screen parameters of the respective shooting screens are acquired, the sharpness of each shooting screen is determined, and the highest resolution image is determined. Select the camera to which the highest resolution shooting screen belongs as the reference camera. When the photographing screens of the respective cameras are respectively acquired, the movement of each camera may be controlled without any movement, and the data points or object distances of the respective cameras are maintained at the state when the focus command is received, and the data of each camera is also obtained when the focus command is received. Points or object distances are consistent.

After determining the reference camera, the reference camera is controlled to focus. When the reference camera performs focusing, the object distance of the reference camera lens is adjusted by referring to the data point of the voice coil motor of the camera, and the focus distance of the reference camera is adjusted to make the reference camera The imaging is in the clearest state. After the reference camera finishes focusing, the number of data points of the voice coil motor of the reference camera is obtained, that is, the number of data points of the reference camera is determined.

S102: Determine, according to the number of data points of the reference camera, the number of data points of the follow-up camera; wherein the follow-up camera is a camera other than the reference camera of the at least two cameras;

Here, each camera has a corresponding focus data relationship, wherein the focus data map is closed to a correspondence relationship between the number of data points and the object distance. In the embodiment of the present invention, the method further includes at least one of: setting a data point number and an object distance having a one-to-one mapping relationship, generating a focus data relationship; setting a fitting curve parameter corresponding to the fitting curve relationship, according to the fitting curve The relationship between the parameter and the fitted curve generates a focus data relationship.

In the above relationship between the number of data points having a one-to-one mapping relationship and the object distance generating focus data, the correspondence between the number of data points of each camera and the object distance can be determined according to actual tests, and the one-to-one correspondence is preset in advance in the terminal. The number of data points and the object distance of the relationship generate a focus data relationship composed of the relationship between the number of data points and the object distance.

In the above-mentioned setting curve curve corresponding to the fitting curve relationship, according to the relationship between the fitting curve parameter and the fitting curve relationship to generate a focus data relationship to generate a focus data relationship, the curve relationship can be determined according to the test and preset In combination with the curve parameters, in the curve relationship, the data points and the object distance are used as the fitting parameters, and the curve parameters are fitted as the fitting coefficients, thereby generating the focus data relationship between the data points and the object distance. Among them, when choosing the curve relationship, you can choose different methods to fit, such as polynomial fitting, exponential function fitting, linear fitting and so on. The specific fitting curve relationship is not limited in the embodiment of the present invention.

After obtaining the number of data points after the reference camera completes focusing, determining the number of data points of the follow-up camera according to the data points of the reference camera includes: determining, according to the data point number of the reference camera and the focus data relationship of the reference camera Determining the object distance corresponding to the camera; determining the object distance corresponding to the following camera according to the object distance corresponding to the reference camera; determining the relationship according to the object distance corresponding to the following camera and the focus data relationship of the follow-up camera The number of data points of the follow-up camera. Here, the object distance of the reference camera is determined according to the number of data points of the reference camera, the object distance of the follow-up camera is determined according to the object distance of the reference camera, and the data points of the other follow-up cameras are further determined according to the determined object distance of the follow-up camera. Here, the reference camera and the follow-up camera belong to the same terminal, and the objects to be photographed are the same, and the object distance of the reference camera and the object distance of the follow-up camera are considered to be the same, that is, the object distance of the reference camera and the object distance of the follow-up camera are equal.

For example, when the number of data points of the reference camera is DN1, the corresponding object distance is determined as L1 according to the focus data relationship of the reference camera; then the data point number DN2, DN3 of the follow-up camera is determined according to the focus data relationship of the follow-up camera according to the object distance L1. Etc. Here, the number of determined data points is the same as the number of follow-up cameras, thereby ensuring that one camera has a corresponding number of data points.

S103. Control the follow-up camera to perform focusing according to the number of data points of the follow-up camera.

After determining the number of data points of the follow-up camera, the voice coil motor of each follow-up camera is controlled to perform corresponding movement according to the number of data points of each follow-up camera, thereby achieving focusing of a plurality of cameras including the reference camera and the follow-up camera.

In the embodiment of the present invention, the reference camera may be determined according to a default setting, and the reference camera may be determined according to environmental parameters or imaging of each camera, so that the selection of the reference camera can be flexibly selected according to actual needs, and the focus command is received. After that, first focus on the reference camera, and obtain the number of data points of the reference camera, and further determine the number of data points of other follow-up cameras according to the number of data points of the reference camera, so that all the cameras can quickly focus. In the embodiment of the present invention, it is not mandatory to ensure that the parameters between the cameras are consistent or corresponding mapping, but each camera has its own focus data relationship, so that each camera performs precise focusing.

Embodiment 2

In this embodiment, the focusing method provided by the embodiment of the present invention is further described by a specific scenario application.

Here, first, the relationship of the focus data of each camera in the embodiment of the present invention will be described. Specifically, the method relates to measuring and fitting the focus parameters of a voice coil motor (VCM) of a plurality of cameras. The focusing parameter of the camera is fitted to the corresponding output curve, and the parameters of the fitting curve are stored on the terminal. When focusing is performed, after focusing on one camera, according to the data information of each camera, the positions that other cameras need to reach are calculated, so that the focusing speed can be improved in the multi-camera photographing, and the multi-camera cooperative focusing can be more effectively realized.

Here, through the depth of field information of the lens, the correspondence between the object distance and the focus is clear, and the corresponding distance of the lens needs to be moved as shown in FIG. 2, wherein, in FIG. 2, the horizontal axis represents the object distance (unit: meter), and the vertical axis represents The distance the lens lens needs to move (in millimeters). When the camera focuses on clear imaging, the object distance is represented by L, and the distance that the lens needs to move is represented by M. Different methods are selected according to the distribution data characteristics of the object distance and the movement amount of the lens, for example: polynomial fitting, exponential function Fitting, linear fitting, etc., when using polynomial fitting, the following fitting curve relationship can be used:

When fitting with an exponential function, a fitting curve relationship can be used: M = k1 * e ^{k2 * L} 1 .

Here, the fitting of the fitting curve relationship by the polynomial fitting is explained, and 1 is changed to obtain:

The VCM is driven by the driving circuit. The measured data of the output data point number (DN) of the driving circuit and the moving distance M of the lens (unit: mm) can pass the relationship shown in FIG. 3: where the horizontal axis is lens The moving distance is M, and the vertical axis is the output DN of the driving circuit.

Among them, due to the effect of gravity, VCM will have three orientations of up, down and horizontal when shooting. As shown in Figure 3, the driving current of VCM is horizontally placed. From 0 to full scale / from full scale to 0, that is, two curves of data points from 0 to full scale / from full scale to 0. For the other two direction curve characteristics, you only need to increase or decrease the necessary offset based on the horizontal curve.

M=k3*DN+offset 3 to indicate that

The relationship between the object distance L and the DN of the voice coil motor is obtained from 2 and 3:

That is, the focus data relationship; through the focus data relationship 4, the control can be known according to the object distance L value. The DN value of the drive circuit output of the voice coil motor, and the object distance L is obtained from the DN value.

For the terminal or device with i cameras, test the data of each camera separately, and fit the function relationship between L_i and DN_i respectively:

For camera 1: L ₁ =ln((k3 ₁ *DN ₁ +offset ₁ )/k1 ₁ )/k2 ₁ ;

For camera 2: L ₂ = ln((k3 ₂ *DN ₂ +offset ₂ )/k1 ₂ )/k2 ₂ ;......

For camera i:L _i =ln((k3 _i *DN _i +offset _i )/k1 _i )/k ₂ i

When multiple cameras are in focus, one of the cameras is in focus at DN ₁ , then the object distance L _{1 is} calculated according to the focus data relationship of the camera ₁ , and the focus data relationship 4 is used by L ₁ to calculate other cameras. The DN value of the driver IC output of the voice coil motor.

In practical applications, the focus data relationship can be determined in the following ways:

(1) In the storage device of the camera, parameters of the fitting curve, such as k1, k2, k3, and off, are stored, and a focus data relationship is generated.

(2) According to the fitting curve, a data table of L and DN is generated, and the information is stored in the storage device of the camera.

(3) Determine the data of the correspondence between L and DN, and store the data in the camera memory.

Wherein, the fitting curve parameter is set in the (1) mode, and the focus data relationship between the object distance and the number of data points is generated according to the fitting curve parameter and the fitting curve relationship. In the (2) and (3) modes, the object distance and the number of data points having a one-to-one correspondence relationship are set to generate a focus data relationship regarding the object distance and the number of data points.

When setting the above data, when focusing on multiple cameras, the method of focusing is shown in Figure 4:

S401, start a camera, and load a mapping data relationship of each camera;

S402, the reference camera performs focusing, and obtains the data points of the reference camera;

One of the cameras starts taking a photo to complete the focus. Record the DN value at this time. Here, you can select one camera as the reference camera to complete the focus. You can also select the main camera set by the user as the reference camera to focus, or you can focus multiple cameras separately to get the most clear image. The camera focuses as a reference camera.

After the reference camera is focused, the number of data points of the reference camera is recorded as DN ₀ .

S403. Determine an object distance of the reference camera according to the number of data points of the reference camera.

According to the specific form of the focus data mapping relationship of the reference camera, the object distance L corresponding to the DN _{0 of the} reference camera is determined by a function formula or a table lookup form.

S404. Determine, according to the object distance of the reference camera, the number of data points of the follow-up camera;

Here, the object distance L of the reference camera determined in S403 is the object distance of the follow-up camera, and the DN _{i of the} follow-up camera is determined according to the object distance L according to the function type or the look-up table, and the data point of the i-th camera is DN. _i . Here, the follow-up camera may be one or plural.

S405. Control the follow-up camera to focus according to the data points of the follow-up camera.

The i-th camera is moved to the DNi position according to the DN _i determined in S404.

Here, after moving the camera to the DNi position, it can be further judged whether the camera i is sufficiently clear when the current DNi is photographed, and if the definition is not satisfied, fine adjustment can be made near DNi until the resolution meets the requirements.

When the camera of the terminal is in focus, the data of the camera, video or captured video can be comprehensively processed, such as photo combination.

In practical applications, S401 can be executed when the terminal is started, so that the loaded data is directly used when starting the focusing of the multi-camera.

Embodiment 3

In this embodiment, a focusing method provided by an embodiment of the present invention is described by taking a dual camera device having chrome+mono as an example.

In the glare environment, the chrome camera module is used as the reference camera to focus, and the mono camera module is used as the follow-up camera. After the main camera is focused, the number of data points of the chrome camera module is used to quickly calculate the DN value required for the mono camera module to focus. .

In the dark environment, due to the mono camera module, with higher signal-to-noise ratio and better sensitivity, the mono camera module is selected as the reference camera, and the chrome camera module is used as the follow-up camera. When the mono camera module is in focus, Through the data points of the mono camera module, the DN value required for the focus of the chrome camera module can be accurately obtained.

Embodiments of the present invention further provide a computer readable storage medium storing a computer executable The instructions, when the computer executable instructions are executed, implement the above method.

Embodiment 4

In this embodiment, in order to implement the focusing method provided by the foregoing embodiment, the embodiment provides a focusing device. As shown in FIG. 5, the device includes: at least two imaging units 501, as shown by the dotted line in FIG. The device further includes: a reference focusing unit 502, a data acquiring unit 503, and a follow-up focusing unit 504;

The reference focusing unit 502 is configured to control the reference imaging unit of the at least two imaging units 501 to perform focusing, and acquire the number of data points after the reference imaging unit is in focus;

The data acquisition unit 503 is configured to determine the number of data points of the following imaging unit according to the number of data points of the reference imaging unit; wherein the following imaging unit is an image of the at least two imaging units 501 other than the reference imaging unit unit;

The data acquisition unit 503 is configured to: determine an object distance corresponding to the reference imaging unit according to the data point number of the reference imaging unit and the focus data relationship of the reference imaging unit; determine the object distance according to the object distance corresponding to the reference imaging unit The object distance corresponding to the following camera unit is determined; and the number of data points of the following camera unit is determined according to the object distance corresponding to the following camera unit and the focus data relationship of the following camera unit.

The follow-up focusing unit 504 is configured to control the following imaging unit to perform focusing according to the number of data points of the following imaging unit.

As shown in FIG. 6, the apparatus further includes: a first reference determining unit 505, and the first reference determining unit 505 is configured to:

As shown in FIG. 6, the apparatus further includes: a second reference determining unit 506, and the second reference determining unit 506 is configured to:

Obtaining a photographing screen of each of the at least two imaging units; determining a sharpness of a photographing screen of each of the image capturing units, and determining an image capturing unit to which the sharpest photographing screen belongs is the reference camera.

In an embodiment of the invention, the device sets the focus data relationship by at least one of the following:

Setting a data point number and an object distance having a one-to-one mapping relationship to generate a focus data relationship;

A fitting curve parameter corresponding to the fitting curve relationship is set, and a focus data relationship is generated according to the fitting curve parameter and the fitting curve relationship.

In practical applications, the camera unit 501 can be implemented by a camera. When a logic unit is added to the terminal, the reference focus unit 502, the data acquisition unit 503, and the follow-up focus unit 504 can be centrally located in the terminal (CPU, Central Processing). Unit), Digital Signal Processor (DSP), or Field Programmable Gate Array (FPGA) implementation.

Embodiment 5

In order to implement the focusing method provided by the foregoing embodiment, the embodiment provides a focusing device. As shown in FIG. 7, the device includes: a controller 701, a reference camera module 702, and a follow-up camera module 703. The module 703 is a camera module other than the reference camera module 702 of the at least two camera modules;

The controller 701 is configured to, when receiving the focus command, control the reference camera module 702 to perform focusing, and obtain the number of data points after the reference camera module 702 focuses; determine the follow-up camera module according to the data points of the reference camera module 702. 703 data points;

The follow-up camera module 703 is configured to perform focusing according to the number of data points of the follow-up camera module.

In this embodiment, as shown in FIG. 8, the reference camera module 702 includes a reference voice coil motor 7021 and a reference lens 7022; the follow-up camera module 703 includes a follower voice coil motor 7031 and a follower lens 7032; and the controller 701 Determining the number of data points of the following camera module 703 according to the number of data points of the reference camera module 702 includes: determining the object distance corresponding to the reference lens 7022 according to the data point number of the reference voice coil motor 7021 and the focus data relationship of the reference camera module; Determining the object distance corresponding to the follower lens 7032 according to the object distance corresponding to the reference lens 7022; determining the data points of the follower voice coil motor 7031 according to the object distance of the follower lens 7032 and the focus data relationship of the following camera module .

Optionally, as shown in FIG. 8, the device further includes: a sensor 704;

The sensor 704 is configured to acquire an environmental parameter, and send the environmental parameter to the controller 701;

The controller 701 is configured to determine the ring from the at least two camera modules according to the environmental parameter The reference camera module 702 and/or the follow-up camera module 703 corresponding to the environment parameters.

Optionally, the controller 701 is further configured to: acquire a shooting image of each of the at least two camera modules; determine a sharpness of the captured image of each camera module, and capture the highest resolution The camera module to which the screen belongs is determined as the reference camera module 702.

In an actual application, the memory may be further configured to store a focus data relationship of each camera module; wherein the focus data relationship is generated by at least one of the following:

When the description is made, the camera module in the embodiment of the present invention includes a voice coil motor and a lens. After determining the reference camera module 702 and the follow-up camera module 703 in the camera module, the sound of the camera module 703 will be referred to. The circle motor and the lens are referred to as a reference voice coil motor 7021 and a reference lens 7022, respectively; the voice coil motor and the lens of the following camera module are referred to as a follower voice coil motor 7031 and a follower lens 7032, respectively. Here, the reference camera module 702 determined from the at least two camera modules may be one, and the determined follow-up camera module 703 may be one or more.

Embodiment 6

In the embodiment, the focusing device provided by the embodiment of the present invention is described by the mobile camera shown in FIG. 9. As shown in FIG. 9, the controller 901 and the i camera modules 902 and the i camera modules 902 are included. They are camera modules 9021 to 902i, respectively.

The controller 901 is configured to control functions such as focusing, photographing, effect, ranging, calculation, and compensation of the camera module 902. For the camera module 9021-902i, i≥2, mainly used for photographing, video recording and other functions.

Each camera module includes a lens, a voice coil motor, a sensor, and a memory. The memory stores parameters for photographing and fitting data.

In practical applications, one of the camera modules 9021-902i serves as a reference camera module, and the remaining camera modules serve as a follow-up camera module. When receiving the focus command, the reference camera module performs focusing, and sends the data points of the voice coil motor after the focus is completed to the controller, and the controller according to the received data points and the focus stored in the memory in the reference camera module. Data relationship determination Referencing the object distance of the lens of the camera module and the object distance of the lens of the remaining camera module, and further according to the object distance of the follow-up camera module and the focus data stored in the memory in the follow-up camera module The number of data points of each follow-up data module is determined, and the voice coil motor of the corresponding follow-up camera module is controlled according to each data point to perform focusing, thereby achieving coordinated focusing of multiple cameras. Here, the object distance between the reference camera module and the follow-up camera module is the same.

It should be noted that the focus data relationship of each camera module can be stored through a total memory. The reference camera module is selected by a sensor.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the application can take the form of a hardware embodiment, a software embodiment, or an embodiment in combination with software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable groups thereof. Hehe. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical units; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present application.

Industrial applicability

The embodiment of the invention provides a focusing method and a focusing device, so as to determine the number of data points of the remaining follow-up cameras according to the number of data points after the reference camera is focused, and control the cameras to focus by the number of data points of each camera, thereby effectively improving the number of the cameras. The camera's focusing speed and focus accuracy enable fast and effective focusing between multiple cameras.

Claims

A focusing method comprising:

Receiving a focus command, controlling a reference camera of at least two cameras to perform focusing, and acquiring a data point after the reference camera is in focus;

Determining, according to the number of data points of the reference camera, the number of data points of the follow-up camera; wherein the follow-up camera is a camera other than the reference camera of the at least two cameras;

The follow-up camera is controlled to perform focusing according to the number of data points of the follow-up camera.
The method of claim 1 further comprising:

Obtaining an environmental parameter, and determining, from the at least two cameras, a reference camera and/or a follow-up camera corresponding to the environmental parameter according to the environmental parameter.
The method of claim 1 further comprising:

Obtaining a photographing screen of each of the at least two cameras;

The sharpness of the photographing screen of each camera is determined, and the camera to which the sharpest photographing screen belongs is determined as the reference camera.
The method of claim 1, wherein the step of determining the number of data points of the follower camera based on the number of data points of the reference camera comprises:

Determining an object distance corresponding to the reference camera according to a relationship between a data point number of the reference camera and a focus data of the reference camera;

Determining an object distance corresponding to the following camera according to an object distance corresponding to the reference camera;

Determining the number of data points of the follow-up camera according to the object distance corresponding to the follow-up camera and the focus data relationship of the follow-up camera.
The method of claim 4, the method further comprising at least one of the following:

Setting a data point number and an object distance having a one-to-one mapping relationship to generate the focus data relationship;

A fitting curve parameter corresponding to the fitting curve relationship is set, and the focus data relationship is generated according to the fitting curve parameter and the fitting curve relationship.
A focusing device includes: at least two imaging units, the device further comprising: a reference focusing unit, a data acquiring unit, and a follow-up focusing unit; wherein

The reference focusing unit is configured to control a reference imaging unit of the at least two imaging units to perform focusing when receiving a focus instruction, and acquire a data point after the reference imaging unit is in focus;

The data acquisition unit is configured to determine the number of data points of the following imaging unit according to the number of data points of the reference imaging unit; wherein the following imaging unit is other than the reference imaging unit of the at least two imaging units Camera unit

The follow-up focusing unit is configured to control the follow-up imaging unit to perform focusing according to the number of data points of the following imaging unit.
The apparatus of claim 6, further comprising: a first reference determining unit, the first reference determining unit being configured to:

Obtaining an environment parameter, and determining, from the at least two camera units, a reference camera unit and/or a follow-up camera unit corresponding to the environment parameter according to the environment parameter.
The apparatus of claim 6, further comprising: a second reference determining unit, the second reference determining unit being configured to:

Obtaining a photographing screen of each of the at least two camera units;

The sharpness of the photographing screen of each imaging unit is determined, and the imaging unit to which the highest-definition photographing screen belongs is determined as the reference camera.
The apparatus according to claim 6, wherein said data acquisition unit is configured to:

Determining an object distance corresponding to the reference camera unit according to a relationship between a data point number of the reference camera unit and a focus data relationship of the reference camera unit;

Determining an object distance corresponding to the following camera unit according to an object distance corresponding to the reference camera unit;

Determining the number of data points of the follow-up imaging unit according to the object distance corresponding to the following imaging unit and the focus data relationship of the following imaging unit.
A focusing device includes: a controller, a reference camera module, and a follow-up camera module; the follow-up camera module is a camera module other than the reference camera module of at least two camera modules;

The controller is configured to, when receiving the focus command, control the reference camera module to perform focusing, and acquire data points after the reference camera module is in focus; according to the reference camera module The number of data points determines the number of data points of the follow-up camera module;

The follow-up camera module is configured to perform focusing according to the number of data points of the following camera module.
The apparatus of claim 10 further comprising: a sensor;

The sensor is configured to acquire an environmental parameter, and send the environmental parameter to the controller;

The controller is configured to determine a reference camera module and/or a follow-up camera module corresponding to the environment parameter from the at least two camera modules according to an environmental parameter.
The apparatus of claim 10, the controller further configured to:

Obtaining a shooting image of each of the at least two camera modules;

Determining the sharpness of the captured image of each camera module, and determining the camera module to which the highest-resolution captured image belongs is the reference camera module.
The device according to claim 10, wherein the reference camera module comprises a reference voice coil motor and a reference lens; the follow-up camera module comprises a follower voice coil motor and a follower lens;

The controller determines the number of data points of the following camera module according to the number of data points of the reference camera module in the following manner:

Determining an object distance corresponding to the reference lens according to a relationship between a data point number of the reference voice coil motor and a focus data of the reference camera module;

Determining an object distance corresponding to the following lens according to an object distance corresponding to the reference lens;

Determining the number of data points of the follower voice coil motor according to the object distance corresponding to the following lens and the focus data relationship of the following camera module.
A computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.