CN105827944B

CN105827944B - A kind of focusing method and mobile terminal

Info

Publication number: CN105827944B
Application number: CN201510833262.0A
Authority: CN
Inventors: 张新远
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2019-05-17
Anticipated expiration: 2035-11-25
Also published as: CN105827944A

Abstract

The present invention provides a kind of focusing method, which includes: the object pixel size obtained focused when completing every time and motor position and save；According to object pixel size and motor position, the matching relationship function of motor position and object pixel size is generated；Obtain the first object Pixel Dimensions focused next time；According to matching relationship function, it is calculated and first object Pixel Dimensions matched first motor calculating position；According to the first motor calculating position, motor position is adjusted, this focusing is completed.The present invention also provides a kind of corresponding mobile terminals.Focusing method provided by the invention, the matching relationship function for generating motor position and object pixel size is fitted based on object pixel size and motor position, to directly obtain the first motor calculating position by matching relationship function in focus process next time, focusing speed when shooting the same target object or same type objects is improved, user experience is improved.

Description

A kind of focusing method and mobile terminal

Technical field

The present invention relates to fields of communication technology, and more particularly, to a kind of focusing method and mobile terminal.

Background technique

Current mobile terminal camera, which is taken pictures, increasingly pursues ultimate attainment user experience, and wherein quickly captures and clap with moving object Taking the photograph is extremely common scene.

Current mobile terminal camera is after unlatching, and with the variation of photographed scene, focus process is very frequent, focusing speed Low, the prior art generallys use a kind of mode based on contrast focusing, needs to search out most on entire motor stroke space Motor position when good focusing needs repeatedly the continuous contrast attempted mobile motor position and calculate image sampling point, consumption When and power consumption it is all larger；Focusing mode (the Phase Detection Auto based on phase that another kind is widely used Focus, PDAF), there is the case where damaging image quality and cannot settling at one go, on the basis of the initial focusing position of PDAF, together Sample is needed to be adjusted motor position based on contrast and completes focusing；Depth finding focusing based on multi-cam stereo vision, is deposited Needing to increase additional camera, system complexity, cost and power consumption all dramatically increase.

Summary of the invention

The embodiment of the present invention provides a kind of focusing method and mobile terminal, is needed in a manner of the focusing for solving the prior art more The position of secondary mobile motor leads to the problem of time-consuming and power consumption.

In a first aspect, the embodiment of the present invention provides a kind of focusing method, it is applied to a mobile terminal, the mobile terminal packet Camera module is included, the camera module includes the motor for focusing, and the focusing method includes:

It obtains the object pixel size and motor position when focusing is completed every time and saves；

Object pixel size and motor position when being completed according to each focusing of the preservation, and utilize preset algorithm It is fitted operation, generates the matching relationship function of motor position and object pixel size；

Obtain the first object Pixel Dimensions focused next time；

According to the matching relationship function of the generation, it is calculated matched with the first object Pixel Dimensions of the acquisition First motor calculating position；

According to the first motor calculating position being calculated, motor position is adjusted, this focusing is completed.

On the other hand, the embodiment of the present invention also provides a kind of mobile terminal, including camera module, the camera module Including the motor for focusing, the mobile terminal includes:

Processing module, for obtaining each object pixel size focused when completing and motor position and saving；

Fitting module, object pixel size and horse when each focusing for being saved according to the processing module is completed It is fitted operation up to position, and using preset algorithm, generates the matching relationship function of motor position and object pixel size；

Module is obtained, for obtaining the first object Pixel Dimensions focused next time；

Computing module, the matching relationship function for being generated according to the fitting module, is calculated and the acquisition First object Pixel Dimensions matched first motor calculating position；

Module is adjusted, the first motor calculating position for being calculated according to the computing module adjusts motor position, Complete this focusing.

In this way, object pixel size and motor in the focusing method of the embodiment of the present invention, when being completed based on each focusing Position is fitted the matching relationship function generated between motor position and object pixel size, thus in focus process next time In, the first motor calculating position is calculated according to the first object Pixel Dimensions of the secondary focusing, adjusts motor position, completion pair It is burnt.It solves the problems, such as that the focusing mode of the prior art needs repeatedly the position of mobile motor to lead to time-consuming and power consumption, is promoted Focusing speed when the shooting same target object or same type objects, improves user experience.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 shows the flow charts for the focusing method that the first embodiment of the present invention provides；

Fig. 2 indicates the flow chart for the focusing method that the second embodiment of the present invention provides；

Fig. 3 indicates the basic composite structural diagram for the mobile terminal that the third embodiment of the present invention provides；

Fig. 4 indicates the concrete structure diagram for another mobile terminal that the third embodiment of the present invention provides；

Fig. 5 indicates the concrete structure diagram for another mobile terminal that the third embodiment of the present invention provides；

Fig. 6 indicates the composite structural diagram for the mobile terminal that the fourth embodiment of the present invention provides；

Fig. 7 indicates the composite structural diagram for the mobile terminal that the fifth embodiment of the present invention provides.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

First embodiment

As shown in Figure 1, the first embodiment of the present invention provides a kind of focusing method, it is applied to a mobile terminal, the shifting Dynamic terminal includes camera module, and the camera module includes the motor for focusing, and the focusing method includes:

Step 101, the object pixel size and motor position when focusing is completed every time are obtained and is saved.

In this step, when focusing is completed when the success of shooting photo, after camera module is opened, camera module is taken the photograph As head will start, camera be towards position the camera module shooting area, camera module can be automatically in shooting area Focusing area is determined in domain, and focus target is determined out of described focusing area；The focus target can be with appointing in focusing area One object, such as face, automobile etc., are not specifically limited herein.It is focused after determining focus target by automatic center region Or manual touch-control focusing focuses to realize focusing and completes simultaneously successfully to shoot photo, then obtain the target of focus target in this photo The motor position of Pixel Dimensions and camera module.

In the embodiment of the present invention, the motor position of camera module is indicated with its driving current, i.e., by changing driving The size of electric current changes the position of motor to realize.

The condition setting saved to data (object pixel size and motor position) is as follows: when this focusing is completed, Motor position is compared with all motor positions saved, if the motor position completed of this acquired focusing with The motor position of preservation is identical or very close, then does not save motor position and object pixel size that this is taken pictures.Specifically, The total stroke for remembering motor is [0, J], and carrying out K equal part to [0, J], (value of K is big according to specific camera module motor stroke Depending on small), such as obtain NHV (the nearest history motor of position in present motor position and the motor position saved Positional value), and the absolute value of present motor positional value and the difference of NHV is calculated, then obtain the absolute value and motor stroke range The ratio r atio of value, if ratio less than a preset value ST, shows that new motor position is very close or identical with NHV, then The motor position and object pixel size that this is taken pictures are not saved.Ratio r atio=(the mo-NHV)/J；Wherein, mo is new Motor position do not save the motor position and object pixel size that this is taken pictures if ratio < (J/K) (preset value).

Step 102, object pixel size and motor position when being completed according to each focusing of the preservation, and utilize Preset algorithm is fitted operation, generates the matching relationship function of motor position and object pixel size.

In this step, object pixel size and motor position as data to saving, i.e., object pixel size with Motor position saves correspondingly.The purpose of this step is to obtain multiple discrete data continuously to operation is fitted Matching relationship function.

The fit approach of the matching relationship function of the embodiment of the present invention, the focus target suitable for any classification.One It is associated with a kind of target with relation function, such as the matching relationship function is to obtain based on the focus target that classification is " face ", Then the matching relationship function is matched for " face "；Such as the matching relationship function is the focusing mesh for being " XX object " based on classification What mark obtained, then the matching relationship function is matched for " XX object ".

Step 103, the first object Pixel Dimensions focused next time are obtained.

In this step, focusing refers to any primary focusing after determining matching relationship function, the first object next time Pixel Dimensions are the object pixel size for determining any any one focus target once focused after matching relationship function.

Step 104, according to the matching relationship function of the generation, the first object pixel ruler with the acquisition is calculated Very little matched first motor calculating position.

In this step, first object Pixel Dimensions are substituted into the matching relationship function, to obtain and first object Pixel Dimensions matched first motor calculating position.

Step 105, according to the first motor calculating position being calculated, motor position is adjusted, this focusing is completed.

In this step, motor is moved directly into the first motor calculating position first, the first motor calculating position is this The initial focusing position of the motor of focusing, but since the first motor calculating position is certain inclined with the presence of actual motor focusing position Difference also needs adjustment motor position at this time, so that the clarity of the focus target of this focusing meets predetermined condition, to realize this Secondary focusing.

In the embodiment of the present invention, after the completion of matching relationship Function Fitting, it is possible to realize that a step is focused, i.e., move motor It moves to after the first motor calculating position, this focusing can be completed, no longer need to carry out focusing adjustment.Due to depositing for such situation In the first embodiment of the present invention, after the first motor is moved to the first motor calculating position, current focusing need to obtained The clarity of target；If its clarity meets preset condition, without carrying out focusing adjustment, this focusing is completed；If it is clear Degree is unsatisfactory for preset condition, then carries out focusing adjustment, until the clarity of focus target meets predetermined condition, this has been focused At.

Of the invention first passes through the matching relationship function that fitting generates motor position and object pixel size in implementing, from And the first motor calculating position can be quickly determined in focus process next time, and according to the first motor calculating position, adjust horse It realizes and focuses up to position, the focusing mode for solving the prior art needs repeatedly the position of mobile motor to lead to time-consuming and power consumption Focusing low efficiency the problem of, have improve focusing speed, realize rapid focus.

Further, in the first embodiment of the present invention, step 102 is specifically included:

By the number of the object pixel size of the preservation and the data pair of motor position with to the unknown of fitting function Several number N are compared, and the value of the N is according to selected to fitting function prototype and the first motor calculating position Depending on precision；

When the number of data pair is more than or equal to N, meet the formation condition of matching relationship function, then according to pre- imputation Method carries out least square fitting operation, obtains the value of each unknown number to fitting function；

According to the value of obtained each unknown number to fitting function, motor position and object pixel size are generated Matching relationship function.

The step 105 specifically includes:

By the first motor calculating position being calculated towards the nearly burnt mobile preset safe distance S in direction, and will Unidirectionally locally focusing direction is determined as remote Jiao Fangxiang to motor, adjusts motor position, completes this focusing, the value foundation of the S Depending on camera module characteristic commissioning.

In the first embodiment of the present invention, fortune is fitted to object pixel size and motor position using preset algorithm It before calculation, need to first determine one to fitting function, it is preferred that for example determine one to fitting function (using the form of Taylor expansion) Are as follows: f (x)=a+b (x-a)+c (x-a)²+d(x-a)³+e(x-a)⁴；Wherein, x indicates object pixel size when focusing is completed；f (x) calculated first motor calculating position is indicated.Such as should be 5 to the number N value of unknown number in fitting function, respectively a,b,c,d,e；Then according to mathematical logic, 5 unknown numbers of demand then at least need 5 data pair, i.e., the number that ought have only saved According to pair number be more than or equal to 5 when, just meet fitting generate matching relationship function condition.

Its specific approximating method is, according at least five data pair, is fitted operation using least square method, respectively Obtain the occurrence of a, b, c, d, e；To which the occurrence of a, b, c, d, e are substituted into above-mentioned f (x)=a+b (x-a)+c (x-a)²+d (x-a)³+e(x-a)⁴In, the matching relationship function of motor position Yu object pixel size can be obtained.

Further, after obtaining the first motor calculating position according to matching relationship function, for the first motor calculating position The case where not being the final motor position of this focusing, the step of motor position is adjusted in step 105 specifically: by motor from the One motor position towards the mobile default safe distance S in nearly burnt direction, safe distance S according to camera module characteristic commissioning and It is fixed, do not make the restriction of occurrence herein.I.e. first by motor towards the nearly burnt mobile S in direction, then to remote burnt direction movement, to realize this Secondary focusing.Such as first motor position be 5, S be equal to 0.5, then be reduced to 4.5 for 5 first, then tune up, prevent toning.

Fit procedure is described in detail in the first embodiment of the present invention, the least square method that is directed to, Taylor Expansion is presently preferred embodiments of the present invention, is not used in the protection scope of limitation the application；Other volume approximating methods are equally suitable For the application, will not repeat them here.

Being increasing with the number of data pair in the first embodiment of the present invention, motor position and object pixel size Matching relationship Function Fitting after the completion of, need not continue to save focusing complete when motor position and object pixel size, Motor position directly is obtained using the matching relationship function that fitting is completed in subsequent focus process.As well as matching Relation function has been fitted completion, then the motor position and object pixel size saved is no in all senses, in order to save movement The motor position saved and object pixel size are then deleted, and terminate fit procedure by the memory space of terminal.

In the embodiment of the present invention, specifically judge the method whether matching relationship function terminates to be fitted are as follows: according to fitting Matching relationship function f (x), object pixel size matched first motor calculating position f when completing with focusing is calculated (x_i)；By the first motor calculating position f (x_i) with focusing complete when object pixel size actual motor position P_iIt (has saved Focusing complete when all motor positions) compared one by one, obtain absolute difference: Δ x_i=abs (f (x_i)-P_i)；Statistics All motor position f (x being calculated_i) and actual motor position P_iThe average value of absolute difference:(wherein: m The number of motor position data when focusing to have saved is completed), ifThen terminate to be fitted, and deletes Except all data for fitting, wherein δ is the threshold value of a system intialization, whole stroke of the specific value according to focusing motor Range [0, J] is fixed.

In the embodiment of the present invention, by the motor position and object pixel that save camera module when completing of focusing every time Size has all determined an independent variable of the functional relation and the discrete respective value of functional value when focusing is completed every time.According to existing Some Function Fitting technologies, to linear or nonlinear functional relation is fitted, work as discrete data using the discrete data of preservation Pair number when meeting certain requirements, the Function Fitting of single independent variable can obtain optimal fitting effect.

In the embodiment of the present invention, in order to save the memory space of mobile terminal, can periodically clear up it is a part of for a long time not by The data reused, such as user remove snow mountain, shoot the photo of a snow mountain, then can be stored with each pixel ruler of snow mountain The very little corresponding relationship with best focusing position.And the even longer time of this latter year, 2 years, it is taken the photograph with this is not reused per family As head mould group shot snow mountain, therefore user can delete its data about snow mountain manually, to guarantee the memory space of mobile terminal Abundance.Others, can also by for each focus target image be arranged a timing aging device come be arranged the corresponding period come Achieve the purpose that delete and does not have to data.

Object pixel size and motor position when in the first embodiment of the present invention by completing each focusing are intended Symphysis is at matching relationship function, to can directly determine motor position according to the Pixel Dimensions of focus target when focusing next time It sets, then realizes the purpose of focusing by adjusting motor position, the focusing mode for solving the prior art needs repeatedly to move horse The position reached leads to the problem of time-consuming and power consumption, according to the matching relationship function generated is fitted, can quickly be calculated Motor position improves focusing speed when shooting the same target object or same type objects, improves user experience.

To sum up, the first embodiment of the present invention mainly for can be fitted generate matching relationship function application scenarios, and For without generating matching relationship function or can not temporarily generate the application scenarios of matching relationship function, the embodiment of the present invention is also mentioned For a second embodiment.

Second embodiment

As shown in Fig. 2, the second embodiment of the present invention provides a kind of focusing method, it is applied to a mobile terminal, the shifting Dynamic terminal includes camera module, and the camera module includes the motor for focusing, which is applied to save Object pixel size and the number of data pair of motor position the case where being less than number N to the unknown number of fitting function or The object pixel size and motor position that person's second embodiment is applied to without fitting function according only to preservation obtain the The case where one motor calculating position.

Specifically, focusing method described in the second embodiment of the present invention includes:

Step 201, the object pixel size and motor position when focusing is completed every time are obtained and is saved.

In the embodiment of the present invention, for the application scenarios without carrying out Function Fitting, if when being completed to all focusings Object pixel size and motor position are saved, and the data volume that will lead to preservation is very big, and there are a large amount of repetitions or close Data, lead to the waste of data.In the embodiment of the present invention, for new primary focusing, when focusing is completed, by motor position It is compared with all motor positions saved, if new motor position is identical as the motor position saved or unusual phase Closely, then the motor position and object pixel size that this is taken pictures are not saved.Specifically, total stroke of note motor is [0, J], it is right [0, J] K equal part (depending on the value of K is according to specific camera module motor stroke size) is carried out, such as obtains present motor position NHV (a nearest history motor position value of position) in the motor position set and saved, and calculate present motor position The difference of value and NHV, then obtains the ratio r atio of the difference Yu motor stroke range value, if ratio less than a preset value ST, Then show that new motor position is very close or identical with NHV, does not then save motor position and object pixel ruler that this is taken pictures It is very little.That is ratio r atio=(mo-NHV)/J；Wherein, mo is new motor position, if ratio < (J/K) (preset value), is not protected Deposit the motor position and object pixel size that this is taken pictures.

Step 202, the first object Pixel Dimensions focused next time are obtained.

Step 203, according to the object pixel size and motor position of the preservation, by default computation rule obtain with The first object Pixel Dimensions matched first motor calculating position of the acquisition.

Matching relationship function is generated due to not being fitted in the second embodiment of the present invention, then the first motor calculating position can not According to matching relationship function, then the second embodiment obtains the first motor calculating position by step 203, that is, passes through discrete number According to calculating the first motor calculating position.

Step 204, according to the first motor calculating position being calculated, motor position is adjusted, this focusing is completed.

Specifically, four kinds of situations are broadly divided into come the method that calculates the first motor calculating position by discrete data, These four situations are described in detail separately below:

Situation one: the step 203 specifically includes:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, work as institute The the second object pixel size stated in the first object Pixel Dimensions of acquisition and all object pixel sizes of the preservation is identical When, it will be with matched second motor position of the second object pixel size as the first motor calculating position.

The situation once, one in object pixel size that first object Pixel Dimensions have exactly equal to saved, then with The equal corresponding motor position of the object pixel size of preservation of first object Pixel Dimensions is then and first object Pixel Dimensions Corresponding first motor calculating position.

Preferably, the step 204 specifically includes:

By the first motor calculating position being calculated towards the nearly burnt mobile preset safe distance S in direction, and will Unidirectionally locally focusing direction is determined as remote Jiao Fangxiang to the motor, adjusts motor position, completes this focusing, the value of the S According to depending on camera module characteristic commissioning.

In this step, after obtaining the first motor calculating position according to step 203, it is not for the first motor calculating position The case where final motor position of this focusing, the step of motor position is adjusted in step 205 specifically: by motor from the first horse Move a default safe distance S along nearly burnt direction up to position, safe distance S according to depending on camera module characteristic commissioning, The restriction of occurrence is not made herein.I.e. first by motor towards the nearly burnt mobile S in direction, then to remote burnt direction movement, to realize this Focusing.Such as first motor position be 5, S be equal to 0.5, then be reduced to 4.5 for 5 first, then tune up, prevent toning.

Situation two: the step 203 specifically includes:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, work as institute It, will be with when stating the first object Pixel Dimensions of acquisition and being less than the minimum target Pixel Dimensions in the object pixel size of the preservation The minimum motor position of the minimum target pixel matching is as the first motor calculating position.

In the situation two, first object Pixel Dimensions and any one in the object pixel size saved not phase Deng, and the first object Pixel Dimensions are less than the minimum target Pixel Dimensions in the object pixel size of the preservation, then it will most The corresponding minimum motor position of Small object Pixel Dimensions as with first object Pixel Dimensions matched first motor calculating position.

Preferably, the step 204 specifically includes:

Situation three: the step 203 specifically includes:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, work as institute It, will be with when stating the first object Pixel Dimensions of acquisition and being greater than the maximum target Pixel Dimensions in the object pixel size of the preservation The maximum motor position of the maximum target pixel matching is as the first motor calculating position.

In the situation three, first object Pixel Dimensions and any one in the object pixel size saved not phase Deng, and the first object Pixel Dimensions are greater than the maximum target Pixel Dimensions in the object pixel size of the preservation, then it will most The corresponding maximum motor position of big object pixel size as with first object Pixel Dimensions matched first motor calculating position.

Preferably, the step 204 specifically includes:

By the first motor calculating position being calculated towards the remote burnt mobile preset safe distance S in direction, and will Unidirectionally locally focusing direction is determined as nearly Jiao Fangxiang to motor, adjusts motor position, completes this focusing, the value foundation of the S Depending on camera module characteristic commissioning.

In this step, after obtaining the first motor calculating position according to step 203, it is not for the first motor calculating position The case where final motor position of this focusing, the step of motor position is adjusted in step 205 specifically: by motor from the first horse Move a default safe distance S along remote burnt direction up to position, safe distance S according to depending on camera module characteristic commissioning, The restriction of occurrence is not made herein.I.e. first by motor towards the remote burnt mobile S in direction, then to nearly burnt direction movement, to realize this Focusing.Such as first motor position be 5, S be equal to 0.5, then increase to 5.5 for 5 first, then turn down, prevent toning.

Situation four: the step 203 specifically includes:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, work as institute The first object Pixel Dimensions of acquisition are stated greater than the third object pixel size in the object pixel size of the preservation, and are less than It, will be with the third object pixel size matched when the 4th object pixel size in the object pixel size of the preservation Three motor positions are as the first motor calculating position.

In the situation four, first object Pixel Dimensions and any one in the object pixel size saved not phase Deng, and the first object Pixel Dimensions are placed exactly between third object pixel size and the 4th object pixel size, then at this time It is calculated using the corresponding third motor position of third object pixel size as with matched first motor of first object Pixel Dimensions Position；Or using corresponding 4th motor position of the 4th object pixel size as with first object Pixel Dimensions matched first Motor calculating position.

In the embodiment of the present invention, using the corresponding third motor position of third object pixel size as with first object pixel When the matched first motor calculating position of size, the step 204 is specifically included:

In this step, after obtaining the first motor calculating position according to step 203, it is not for the first motor calculating position The case where final motor position of this focusing, the step of motor position is adjusted in step 204 specifically: by motor from the first horse Move a default safe distance S along remote burnt direction up to position, safe distance S according to depending on camera module characteristic commissioning, The restriction of occurrence is not made herein.I.e. first by motor towards the remote burnt mobile S in direction, then to nearly burnt direction movement, to realize this Focusing.Such as first motor position be 5, S be equal to 0.5, then increase to 5.5 for 5 first, then turn down, prevent toning.

In the embodiment of the present invention, using corresponding 4th motor position of the 4th object pixel size as with first object pixel When the matched first motor calculating position of size, step 204 includes:

The motor is moved into a preset safety towards nearly burnt direction from the first motor calculating position being calculated Distance S, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this focusing, the S Value according to depending on camera module characteristic commissioning.

In this step, after obtaining the first motor calculating position according to step 203, it is not for the first motor calculating position The case where final motor position of this focusing, the step of motor position is adjusted in step 204 specifically: by motor from the first horse Move a default safe distance S along nearly burnt direction up to position, safe distance S according to depending on camera module characteristic commissioning, The restriction of occurrence is not made herein.I.e. first by motor towards the nearly burnt mobile S in direction, then to remote burnt direction movement, to realize this Focusing.Such as first motor position be 5, S be equal to 0.5, then be reduced to 4.5 for 5 first, then tune up, prevent toning.

The number that the second embodiment of the present invention is applicable not only to data pair is unsatisfactory for the application scenarios of the condition of fitting, also Suitable for the application scenarios without carrying out Function Fitting, specifically, as follows without the application scenarios for carrying out Function Fitting:

It obtains the object pixel size and motor position when focusing is completed every time and saves, directly acquire later next time The first object Pixel Dimensions of focusing, then accordingly any situation into situation four determines and the first mesh Mark Pixel Dimensions corresponding first motor calculating position；Finally according to the first motor calculating position, motor position is adjusted, completes this Secondary focusing.

The above-mentioned application scenarios without carrying out Function Fitting, eliminate fit procedure, reduce calculation amount, from another point of view Accelerate the process of taking pictures.

To sum up, process of specifically taking pictures of the invention is as follows: receiving the photographing instruction of user, the photographing instruction of user can lead to The modes such as virtual key, physical button, gesture, sound are crossed to input；Detect the object pixel size saved and motor position The number for the data pair set；Judge whether the number M of the data pair is more than or equal to N；If the number of data pair be greater than or Person is equal to N, then shows that matching relationship Function Fitting is completed, and the first motor is calculated according to the matching relationship function and calculates position It sets；If the number M of data pair is less than N, show that matching relationship function is not fitted completion, then the first motor of interpolation calculation calculates position It sets；Specifically, M=0 (numbers of data pair), does not do any operation, keeps the current state of motor；If 0 < M < N (N=5), root According to the object pixel size in current preview frame, and the data centering target picture of object pixel size and motor position saved Plain size compares, and an initial motor position is arranged according to comparative situation and present motor position.

Such as: save two groups of object pixel size-motor position data pair: (t1-m1) and (t2-m2), and t1 < t2. Object pixel size=t0 divides three kinds of situations then the motor position of lens module voice coil motor is arranged in current preview frame:

When a.t0 > t2, motor position=m2+deta is set_t, wherein deta_tIt is 2 one safe adjustment spaces (default), because not A fixed value depending on same lens module motor current value value range.And adjust motor position to small value direction；(5 first 5.5 are added to, then is turned down, toning is prevented)

When b.t1 < t0 < t2, motor position=t1-deta is set_t, and adjust motor position to big value direction；

When c.t0 < t1, motor position=t1+deta is set_t, and adjust motor position to small value direction.

After motor is finally moved to the first motor calculating position, motor position is adjusted, realizes this focusing.

The number of object pixel size and motor position when the second embodiment of the present invention is completed by saving each focusing According to right, so that the first object pixel ruler of the secondary focusing be calculated according to default computation rule in focus process next time Very little corresponding first motor calculating position adjusts motor position, completes focusing.Solve the prior art focusing mode need it is more The position of secondary mobile motor leads to the problem of time-consuming and power consumption, according to default computation rule, can quickly obtain motor position, The process for eliminating fitting adaptation function has further speeded up the speed of focusing, has improved user experience.

3rd embodiment

As shown in figure 3, third embodiment of the invention provides a kind of mobile terminal 300, including camera module, the camera shooting Head mould group includes the motor for focusing, and the mobile terminal 300 includes:

Processing module 301, for obtaining each object pixel size focused when completing and motor position and saving.

Fitting module 302, object pixel size when each focusing for being saved according to the processing module 301 is completed And motor position, and it is fitted operation using preset algorithm, generate the matching relationship of motor position and object pixel size Function.

Module 303 is obtained, for obtaining the first object Pixel Dimensions focused next time.

Computing module 304, the matching relationship function for being generated according to the fitting module 302, be calculated with it is described The first object Pixel Dimensions matched first motor calculating position of acquisition.

Module 305 is adjusted, the first motor calculating position for being calculated according to the computing module 304 adjusts horse Up to position, this focusing is completed.

Further, as shown in figure 4, the fitting module 302 specifically includes:

Third is fitted submodule 3021, for by the data pair of the object pixel size of the preservation and motor position Number is compared with the number N of the unknown number to fitting function, and the value of the N is according to selected to fitting function prototype And first motor calculating position precision depending on.

4th fitting submodule 3022, for meeting matching relationship function when the number of data pair is more than or equal to N Formation condition, then least square fitting operation is carried out according to preset algorithm, obtains each unknown number to fitting function Value.

5th fitting submodule 3023 is generated for the value of each unknown number to fitting function obtained according to The matching relationship function of motor position and object pixel size.

Preferably, the adjustment module 305 specifically includes:

5th adjusting submodule 3051, for the first motor calculating position being calculated is mobile towards nearly burnt direction One preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this Secondary focusing, the value of the S is according to depending on camera module characteristic commissioning.

The third embodiment of the present invention generates the matching relationship function of motor position and object pixel size by fitting, from And the first motor calculating position is directly calculated by matching relationship function in focus process next time, and by adjusting motor Focusing is completed in position, and solving the focusing mode of the prior art, to need the position of repeatedly mobile motor to cause time-consuming and power consumption Problem has and improves focusing speed, realizes rapid focus, improves the candid photograph experience of user.

Mobile terminal shown in Fig. 4 is the mobile terminal of the focusing method provided using above-mentioned first embodiment, then above-mentioned All embodiments for the focusing method that first embodiment provides are suitable for the mobile terminal.

Further, as shown in figure 5, the 3rd embodiment of the embodiment of the present invention also provides another mobile terminal 400, packet It includes:

Processing module 401, for obtaining each object pixel size focused when completing and motor position and saving.

Fitting module 402, object pixel size when each focusing for being saved according to the processing module 401 is completed And motor position, and it is fitted operation using preset algorithm, generate the matching relationship of motor position and object pixel size Function.

Module 403 is obtained, for obtaining the first object Pixel Dimensions focused next time.

Computing module 404, the matching relationship function for being generated according to the fitting module 402, be calculated with it is described The first object Pixel Dimensions matched first motor calculating position of acquisition.

Module 405 is adjusted, the first motor calculating position for being calculated according to the computing module 404 adjusts horse Up to position, this focusing is completed.

Preferably, the fitting module 402 specifically includes:

First fitting submodule 4021, object pixel size and motor position for saving the processing module 401 The number for the data pair set is compared with the number N of the unknown number to fitting function, the value of the N according to it is selected to Depending on the precision of fitting function and the first motor calculating position.

Second fitting submodule 4022, for not meeting the generation of matching relationship function when the number of data pair is less than N Condition.

Then the computing module 404 includes:

First computational submodule 4041, object pixel size and motor for being saved according to the processing module 401 Position is calculated by default computation rule and calculates position with matched first motor of the first object Pixel Dimensions of the acquisition It sets.

Preferably, first computational submodule 4041 specifically includes:

First position determination unit 40411, first object Pixel Dimensions and institute for obtaining the acquisition module 403 All object pixel sizes for stating preservation are compared, when the first object Pixel Dimensions of the acquisition and owning for the preservation It, will be with matched second motor of the second object pixel size when the second object pixel size in object pixel size is identical Position is as the first motor calculating position.

Preferably, the adjustment module 405 specifically includes:

The first adjustment submodule 4051, for the first motor calculating position being calculated is mobile towards nearly burnt direction One preset safe distance S, and by the motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, it is complete At this focusing, the value of the S is according to depending on camera module characteristic commissioning.

Preferably, first computational submodule 4041 specifically includes:

Second position determination unit 40412, first object Pixel Dimensions and institute for obtaining the acquisition module 403 All object pixel sizes for stating preservation are compared, when the first object Pixel Dimensions of the acquisition are less than the mesh of the preservation When marking the minimum target Pixel Dimensions in Pixel Dimensions, using with the minimum motor position of the minimum target pixel matching as the One motor calculating position.

Preferably, the adjustment module 405 specifically includes:

Second adjustment submodule 4052, for the first motor calculating position being calculated is mobile towards nearly burnt direction One preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this Secondary focusing, the value of the S is according to depending on camera module characteristic commissioning.

Preferably, first computational submodule 4041 specifically includes:

The third place determination unit 40413, first object Pixel Dimensions and institute for obtaining the acquisition module 403 All object pixel sizes for stating preservation are compared, when the first object Pixel Dimensions of the acquisition are greater than the mesh of the preservation When marking the maximum target Pixel Dimensions in Pixel Dimensions, using with the maximum motor position of the maximum target pixel matching as the One motor calculating position.

Preferably, the adjustment module 405 specifically includes:

Third adjusting submodule 4053, for the first motor calculating position being calculated is mobile towards remote burnt direction One preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as nearly Jiao Fangxiang, adjusts motor position, completes this Secondary focusing, the value of the S is according to depending on camera module characteristic commissioning.

Preferably, first computational submodule 4041 specifically includes:

4th position determination unit 40414, first object Pixel Dimensions and institute for obtaining the acquisition module 403 All object pixel sizes for stating preservation are compared, when the first object Pixel Dimensions of the acquisition are greater than the mesh of the preservation Mark the third object pixel size in Pixel Dimensions, and the 4th object pixel ruler being less than in the object pixel size of the preservation It, will be with the matched third motor position of the third object pixel size as the first motor calculating position when very little.

Preferably, the adjustment module 405 specifically includes:

4th adjusting submodule 4054, for the first motor calculating position being calculated is mobile towards nearly burnt direction One preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this Secondary focusing, the value of the S is according to depending on camera module characteristic commissioning.

Another mobile terminal that the third embodiment of the present invention provides is the focusing provided using above-mentioned second embodiment All embodiments of the mobile terminal of method, the then focusing method that above-mentioned second embodiment provides are suitable for the mobile terminal.

The mobile terminal of the embodiment of the present invention can be realized mobile terminal in the embodiment of the method for Fig. 1 to Fig. 2 realize it is each A process, to avoid repeating, which is not described herein again.The mobile terminal of the embodiment of the present invention is by above-mentioned module, according to target picture Plain size and motor position fitting generate matching relationship function or default computation rule, can be according to right when focusing next time The Pixel Dimensions of burnt target directly determine motor position, then the purpose of focusing is realized by adjusting motor position, solve existing There is the problem of focusing mode of technology needs the position of repeatedly mobile motor to lead to time-consuming and power consumption, according to be fitted generation Motor position can be quickly calculated in matching relationship function, improve and shoot the same target object or same type objects When focusing speed, improve user experience.

Fourth embodiment

Further, be as shown in Figure 6 fourth embodiment of the invention mobile terminal block diagram.It is shown in fig. 6 mobile whole End 500 includes: at least one processor 501, memory 502, at least one network interface 504 and other users interface 503.It moves Various components in dynamic terminal 500 are coupled by bus system 505.It is understood that bus system 505 is for realizing these Connection communication between component.Bus system 505 further includes power bus, control bus and shape in addition to including data/address bus State signal bus.But for the sake of clear explanation, various buses are all designated as bus system 505 in Fig. 6.

Wherein, user interface 503 may include display, keyboard or pointing device (for example, mouse, trace ball (trackball), touch-sensitive plate or touch screen, camera module etc., the camera module include the motor for focusing.

It is appreciated that the memory 502 in the embodiment of the present invention can be volatile memory or nonvolatile memory, It or may include both volatile and non-volatile memories.And memory 502 is for saving object pixel size and motor position Set and the number N, preset safe distance S etc. of the unknown number to fitting function preservation in need value and constant.Its In, nonvolatile memory can be read-only memory (Read-Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), Erasable Programmable Read Only Memory EPROM (Erasable PROM, EPROM), electric erasable Programmable read only memory (Electrically EPROM, EEPROM) or flash memory.Volatile memory can be arbitrary access Memory (Random Access Memory, RAM) is used as External Cache.By exemplary but be not restricted theory Bright, the RAM of many forms is available, such as static random access memory (Static RAM, SRAM), dynamic random access memory Device (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data Rate synchronization dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic with Machine accesses memory (Enhanced SDRAM, ESDRAM), synchronized links dynamic random access memory (Synchlink DRAM, SLDRAM) and direct rambus random access memory (Direct Rambus RAM, DRRAM).The present invention is implemented The memory 502 of the system and method for example description is intended to include but is not limited to the memory of these and any other suitable type.

In some embodiments, memory 502 stores following element, executable modules or data structures, or Their subset of person or their superset: operating system 5021 and application program 5022.Memory 502 is also used to store The number N, preset safe distance S of unknown number for saving object pixel size and motor position and to fitting function Deng preservation in need value and constant.

Wherein, operating system 5021 include various system programs, such as ccf layer, core library layer, driving layer etc., are used for Realize various basic businesses and the hardware based task of processing.Application program 5022 includes various application programs, such as media Player (Media Player), browser (Browser) etc., for realizing various applied business.Realize the embodiment of the present invention The program of method may be embodied in application program 5022.

In embodiments of the present invention, by the program or instruction of calling memory 502 to store, specifically, can be application The program or instruction stored in program 5022, the camera module in user interface 503 are used to obtain when focusing is completed every time Object pixel size and motor position are simultaneously saved to memory 502；Processor 501 is according to saving in the memory 502 Object pixel size and motor position when focusing is completed every time, and it is fitted operation using preset algorithm, generate motor The matching relationship function of position and object pixel size；Camera module in user interface 503 obtains the to focus next time One object pixel size；The first mesh with the acquisition is calculated according to the matching relationship function of the generation in processor 501 Mark Pixel Dimensions matched first motor calculating position；The camera module of user interface 503 be calculated according to One motor calculating position adjusts motor position, completes this focusing.

The method that the embodiments of the present invention disclose can be applied in processor 501, or be realized by processor 501. Processor 501 may be a kind of IC chip, the processing capacity with signal.During realization, the above method it is each Step can be completed by the integrated logic circuit of the hardware in processor 501 or the instruction of software form.Above-mentioned processing Device 501 can be general processor, digital signal processor (Digital Signal Processor, DSP), dedicated integrated electricity Road (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic, Discrete hardware components.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.It is general Processor can be microprocessor or the processor is also possible to any conventional processor etc..In conjunction with institute of the embodiment of the present invention The step of disclosed method, can be embodied directly in hardware decoding processor and execute completion, or with the hardware in decoding processor And software module combination executes completion.Software module can be located at random access memory, and flash memory, read-only memory may be programmed read-only In the storage medium of this fields such as memory or electrically erasable programmable memory, register maturation.The storage medium is located at The step of memory 502, processor 501 reads the information in memory 502, completes the above method in conjunction with its hardware.

It is understood that the embodiment of the present invention description these embodiments can with hardware, software, firmware, middleware, Microcode or combinations thereof is realized.For hardware realization, processing unit be may be implemented in one or more specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing appts (DSP Device, DSPD), programmable logic device (Programmable Logic Device, PLD), field programmable gate array (Field-Programmable Gate Array, FPGA), general place It manages in device, controller, microcontroller, microprocessor, other electronic units for executing herein described function or combinations thereof.

For software implementations, can by execute the embodiment of the present invention described in function module (such as process, function etc.) come Realize technology described in the embodiment of the present invention.Software code is storable in memory and is executed by processor.Memory can With portion realizes in the processor or outside the processor.

Optionally, as another embodiment, processor 501 is also used to the object pixel ruler for saving the memory 502 The number of very little and motor position data pair is compared with the number N of the unknown number to fitting function, the value root of the N According to it is selected to fitting function prototype and the precision of the first motor calculating position depending on；When the number of data pair is less than N, The formation condition of matching relationship function is not met, then according to the object pixel size and motor position of the preservation, by pre- If computation rule obtains the first object Pixel Dimensions matched first motor calculating position with the acquisition.

Optionally, as another embodiment, processor 501 is also used to the object pixel for saving the memory 502 The number of size and the data pair of motor position is compared with the number N of the unknown number to fitting function, the value of the N According to it is selected to the precision of fitting function and the first motor calculating position depending on；When the number of data pair is greater than or waits When N, least square fitting operation is carried out according to preset algorithm, obtains the value of each unknown number to fitting function；Root According to the value of obtained each unknown number to fitting function, the matching relationship letter of motor position and object pixel size is generated Number；The camera module of user interface 503 is one mobile towards nearly burnt direction by the first motor calculating position being calculated Preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, it is right to complete this Coke, the value of the S is according to depending on camera module characteristic commissioning.

Optionally, as another embodiment, processor 501 is also used to the camera module of the user interface 503 The first object Pixel Dimensions of acquisition are compared with all object pixel sizes that the memory 502 saves, and obtain when described The first object Pixel Dimensions taken be less than the preservation object pixel size in minimum target Pixel Dimensions when, will with it is described The minimum motor position of minimum target pixel matching is as the first motor calculating position；The camera module of user interface 503 will The first motor calculating position being calculated is towards the mobile preset safe distance S in nearly burnt direction, and by the unidirectional office of motor Portion focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this focusing, the value of the S is according to camera module Depending on characteristic commissioning.

Optionally, as another embodiment, processor 501 is also used to the camera module of the user interface 503 The first object Pixel Dimensions of acquisition are compared with all object pixel sizes that the memory 502 saves, and obtain when described The first object Pixel Dimensions taken be greater than the preservation object pixel size in maximum target Pixel Dimensions when, will with it is described The maximum motor position of maximum target pixel matching is as the first motor calculating position；The camera module of user interface 503 will The first motor calculating position being calculated is towards the mobile preset safe distance S in remote burnt direction, and by the unidirectional office of motor Portion focusing direction is determined as nearly Jiao Fangxiang, adjusts motor position, completes this focusing, the value of the S is according to camera module Depending on characteristic commissioning.

Optionally, as another embodiment, processor 501 is also used to the camera module of the user interface 503 The first object Pixel Dimensions of acquisition are compared with all object pixel sizes that the memory 502 saves, and obtain when described The first object Pixel Dimensions taken are greater than the third object pixel size in the object pixel size of the preservation, and are less than described It, will be with the matched third horse of the third object pixel size when the 4th object pixel size in the object pixel size of preservation Up to position as the first motor calculating position；The camera module of user interface 503 is by the first motor meter being calculated Position is calculated towards the nearly burnt mobile preset safe distance S in direction, and unidirectionally locally focusing direction is determined as remote Jiao Fangxiang by motor, Motor position is adjusted, completes this focusing, the value of the S is according to depending on camera module characteristic commissioning.

Optionally, as another embodiment, processor 501 is also used to the object pixel for saving the memory 502 The number of size and the data pair of motor position is compared with the number N of the unknown number to fitting function, the value of the N According to it is selected to fitting function prototype and the precision of the first motor calculating position depending on；Be greater than when the number of data pair or When person is equal to N, meet the formation condition of matching relationship function, then least square fitting operation is carried out according to preset algorithm, obtained The value of each unknown number to fitting function；According to the value of obtained each unknown number to fitting function, generate The matching relationship function of motor position and object pixel size；The camera module of user interface 503 is calculated described First motor calculating position is towards the nearly burnt mobile preset safe distance S in direction, and unidirectionally locally focusing direction determines by motor For remote Jiao Fangxiang, motor position is adjusted, completes this focusing, the value of the S is according to depending on camera module characteristic commissioning.

Mobile terminal 500 can be realized each process that mobile terminal is realized in previous embodiment, to avoid repeating, here It repeats no more.The mobile terminal of the embodiment of the present invention is fitted by above-mentioned module according to object pixel size and motor position Matching relationship function or default computation rule are generated, it can be directly true according to the Pixel Dimensions of focus target when focusing next time Determine motor position, then realize the purpose of focusing by adjusting motor position, solve the prior art focusing mode need it is more The position of secondary mobile motor leads to the problem of time-consuming and power consumption, can be quick according to the matching relationship function generated is fitted Motor position is calculated, improves focusing speed when shooting the same target object or same type objects, improves use Family experience.

5th embodiment

As shown in fig. 7, mobile terminal 600 can be mobile phone, tablet computer, personal digital assistant (Personal Digital Assistant, PDA) or the communication equipment with RF circuit 610 such as vehicle-mounted computer.

Mobile terminal 600 in Fig. 7 includes radio frequency (Radio Frequency, RF) circuit 610, memory 620, input Unit 630, display unit 640, camera module 650, processor 660, voicefrequency circuit 670, WiFi (Wireless Fidelity) module 680 and power supply 690.

Wherein, input unit 630 can be used for receiving the number or character information of user's input, and generation and mobile terminal The related signal input of 600 user setting and function control.Specifically, in the embodiment of the present invention, which can To include touch panel 631.Touch panel 631, also referred to as touch screen collect the touch operation of user on it or nearby (for example user uses the operations of any suitable object or attachment on touch panel 631 such as finger, stylus), and according to preparatory The formula of setting drives corresponding attachment device.Optionally, touch panel 631 may include touch detecting apparatus and touch controller Two parts.Wherein, the touch orientation of touch detecting apparatus detection user, and touch operation bring signal is detected, by signal Send touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, The processor 660 is given again, and can be received order that processor 660 is sent and be executed.Furthermore, it is possible to using resistance-type, The multiple types such as condenser type, infrared ray and surface acoustic wave realize touch panel 631.In addition to touch panel 631, input unit 630 can also include other input equipments 632, other input equipments 632 can include but is not limited to physical keyboard, function key One of (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc. are a variety of.

Wherein, display unit 640 can be used for showing information input by user or be supplied to the information and movement of user The various menu interfaces of terminal 600.Display unit 640 may include display panel 641, optionally, can use LCD or organic hair The forms such as optical diode (Organic Light-Emitting Diode, OLED) configure display panel 641.

In embodiments of the present invention, by call store the first memory 621 in software program and/or module and/ Or the data in the second memory 622, first memory 621 and/or second memory 622 are for saving object pixel size And the number N, preset safe distance S etc. of motor position and the unknown number to fitting function preservation in need value with And constant.Camera module 650 is used to obtain the object pixel size and motor position when focusing is completed every time and saves；Place Reason device 660 is used for object pixel size and motor position when completing according to each focusing of the preservation, and utilizes default Algorithm is fitted operation, generates the matching relationship function of motor position and object pixel size；Obtain the to focus next time One object pixel size；According to the matching relationship function of the generation, the first object pixel ruler with the acquisition is calculated Very little matched first motor calculating position；According to the first motor calculating position being calculated, motor position is adjusted, is completed This focusing.

Optionally, as another embodiment, processor 660 is also used to the object pixel size and motor of the preservation The number of the data pair of position is compared with the number N of the unknown number to fitting function, and the value of the N is according to selected Depending on fitting function prototype and the precision of the first motor calculating position；When the number of data pair is less than N, matching is not met The formation condition of relation function, then according to the object pixel size and motor position of the preservation, by presetting computation rule Obtain the first object Pixel Dimensions matched first motor calculating position with the acquisition.

Optionally, as another embodiment, processor 660 is also used to the object pixel size of the preservation and horse The number of data pair up to position is compared with the number N of the unknown number to fitting function, and the value of the N is according to selected by To depending on the precision of fitting function and the first motor calculating position；When the number of data pair is more than or equal to N, according to Preset algorithm carries out least square fitting operation, obtains the value of each unknown number to fitting function；It is obtained according to described Each unknown number to fitting function value, generate motor position and object pixel size matching relationship function；Camera Mould group 650 by the first motor calculating position being calculated towards the mobile preset safe distance S in nearly burnt direction, and by horse It is determined as remote Jiao Fangxiang up to unidirectional part focusing direction, adjusts motor position, complete this focusing, the value foundation of the S is taken the photograph As depending on head mould group characteristic commissioning.

Optionally, as another embodiment, processor 660 be also used to by the first object Pixel Dimensions of the acquisition with All object pixel sizes of the preservation are compared, when the first object Pixel Dimensions of the acquisition are less than the preservation When minimum target Pixel Dimensions in object pixel size, using with the minimum motor position of the minimum target pixel matching as First motor calculating position；Camera module 650 is mobile towards nearly burnt direction by the first motor calculating position being calculated One preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this Secondary focusing, the value of the S is according to depending on camera module characteristic commissioning.

Optionally, as another embodiment, processor 660 be also used to by the first object Pixel Dimensions of the acquisition with All object pixel sizes of the preservation are compared, when the first object Pixel Dimensions of the acquisition are greater than the preservation When maximum target Pixel Dimensions in object pixel size, using with the maximum motor position of the maximum target pixel matching as First motor calculating position；Camera module 650 is mobile towards remote burnt direction by the first motor calculating position being calculated One preset safe distance S, and by motor, unidirectionally locally focusing direction is determined as nearly Jiao Fangxiang, adjusts motor position, completes this Secondary focusing, the value of the S is according to depending on camera module characteristic commissioning.

Optionally, as another embodiment, processor 660 be also used to by the first object Pixel Dimensions of the acquisition with All object pixel sizes of the preservation are compared, when the first object Pixel Dimensions of the acquisition are greater than the preservation Third object pixel size in object pixel size, and the 4th object pixel being less than in the object pixel size of the preservation It, will be with the matched third motor position of the third object pixel size as the first motor calculating position when size；Camera Mould group 650 by the first motor calculating position being calculated towards the mobile preset safe distance S in nearly burnt direction, and by horse It is determined as remote Jiao Fangxiang up to unidirectional part focusing direction, adjusts motor position, complete this focusing, the value foundation of the S is taken the photograph As depending on head mould group characteristic commissioning.

Optionally, as another embodiment, processor 660 is also used to the object pixel size of the preservation and horse The number of data pair up to position is compared with the number N of the unknown number to fitting function, and the value of the N is according to selected by To fitting function prototype and the precision of the first motor calculating position depending on；When the number of data pair is more than or equal to N, Meet the formation condition of matching relationship function, then least square fitting operation is carried out according to preset algorithm, obtains described wait be fitted The value of each unknown number of function；According to the value of obtained each unknown number to fitting function, generate motor position with The matching relationship function of object pixel size；Camera module 650 is by the first motor calculating position being calculated towards close The mobile preset safe distance S in burnt direction, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position It sets, completes this focusing, the value of the S is according to depending on camera module characteristic commissioning.

It should be noted that touch panel 631 can cover display panel 641, touch display screen is formed, when the touch display screen is examined After measuring touch operation on it or nearby, processor 660 is sent to determine the type of touch event, is followed by subsequent processing device 660 provide corresponding visual output according to the type of touch event in touch display screen.

Touch display screen includes Application Program Interface viewing area and common control viewing area.The Application Program Interface viewing area And arrangement mode of the common control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with The interface elements such as the icon comprising at least one application program and/or widget desktop control.The Application Program Interface viewing area Or the empty interface not comprising any content.This commonly uses control viewing area for showing the higher control of utilization rate, for example, Application icons such as button, interface number, scroll bar, phone directory icon etc. are set.

Wherein processor 660 is the control centre of mobile terminal 600, utilizes various interfaces and connection whole mobile phone Various pieces, by running or executing the software program and/or module that are stored in first memory 621, and calling storage Data in second memory 622 execute the various functions and processing data of mobile terminal 600, thus to mobile terminal 600 Carry out integral monitoring.Optionally, processor 660 may include one or more processing units.

Those of ordinary skill in the art may be aware that the embodiment in conjunction with disclosed in the embodiment of the present invention describe it is each Exemplary unit and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered Think beyond the scope of this invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.This hair The mobile terminal of bright embodiment generates matching relationship letter by above-mentioned module, according to object pixel size and motor position fitting Several or default computation rule can directly determine motor position according to the Pixel Dimensions of focus target when focusing next time, then The purpose that focusing is realized by adjusting motor position, the focusing mode for solving the prior art need repeatedly the position of mobile motor The problem of leading to time-consuming and power consumption is set, according to the matching relationship function generated is fitted, motor position can quickly be calculated It sets, improves focusing speed when shooting the same target object or same type objects, improve user experience.

In embodiment provided herein, it should be understood that disclosed device and method can pass through others Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of device or unit It connects, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention. And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk etc. are various can store program code Medium.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims

1. a kind of focusing method is applied to a mobile terminal, the mobile terminal includes camera module, the camera module Including the motor for focusing, which is characterized in that the focusing method includes:

Object pixel size and motor position when being completed according to each focusing of the preservation, and carried out using preset algorithm Fitting operation generates the matching relationship function of motor position and object pixel size；

Obtain the first object Pixel Dimensions focused next time；

According to the matching relationship function of the generation, the first object Pixel Dimensions matched first with the acquisition are calculated Motor calculating position；

According to the first motor calculating position being calculated, motor position is adjusted, this focusing is completed；

Wherein, each object pixel size and motor position focused when completing according to the preservation, and using in advance The step of imputation method is fitted operation, generates motor position and the matching relationship function of object pixel size, comprising:

By the number of the object pixel size of the preservation and the data pair of motor position and the unknown number to fitting function Number N is compared, and the value of the N is according to selected to fitting function prototype and the precision of the first motor calculating position Depending on；

When the number of data pair is less than N, the formation condition of matching relationship function is not met；

When the number of data pair be more than or equal to N when, meet the formation condition of matching relationship function, then according to preset algorithm into Row least square fitting operation obtains the value of each unknown number to fitting function；According to the obtained letter to be fitted The value of several each unknown numbers generates the matching relationship function of motor position and object pixel size；

In the case where the number of data pair does not meet the formation condition of matching relationship function, the matching according to the generation Relation function, the step of the first motor calculating position matched with the first object Pixel Dimensions of the acquisition is calculated are as follows:

According to the object pixel size and motor position of the preservation, it is calculated and the acquisition by default computation rule First object Pixel Dimensions matched first motor calculating position；

It is wherein, described to obtain each object pixel size focused when completing and motor position and save, comprising:

When focusing is completed every time, a ratio r atio is calculated using the first formula；

Wherein, the first formula are as follows: ratio=(mo-NHV)/J；Mo is motor position when focusing is completed every time；NHV is distance The motor position saved of motor position recently when this focusing is completed；J is the total kilometres of motor；

If the ratio r atio is less than J/K, the object pixel size and motor position when this focusing is completed are not saved；It is no Then, the object pixel size and motor position when this focusing is completed are saved；The wherein total kilometres phase of the value of K and motor It closes.

2. focusing method according to claim 1, which is characterized in that the object pixel size according to the preservation with And motor position, it is calculated and matched first motor of the first object Pixel Dimensions of the acquisition by default computation rule The step of calculating position, comprising:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, are obtained when described It, will when the first object Pixel Dimensions taken are identical as the second object pixel size in all object pixel sizes of the preservation With matched second motor position of the second object pixel size as the first motor calculating position；

The step of first motor calculating position being calculated according to adjusts motor position, completes this focusing packet It includes:

By the first motor calculating position being calculated towards the nearly burnt mobile preset safe distance S in direction, and will be described Unidirectionally locally focusing direction is determined as remote Jiao Fangxiang to motor, adjusts motor position, completes this focusing, the value foundation of the S Depending on camera module characteristic commissioning.

3. focusing method according to claim 1, which is characterized in that the object pixel size according to the preservation with And motor position, it is calculated and matched first motor of the first object Pixel Dimensions of the acquisition by default computation rule The step of calculating position, comprising:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, are obtained when described The first object Pixel Dimensions taken be less than the preservation object pixel size in minimum target Pixel Dimensions when, will with it is described The minimum motor position of minimum target pixel matching is as the first motor calculating position；

By the first motor calculating position being calculated towards the mobile preset safe distance S in nearly burnt direction, and by motor Unidirectional part focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this focusing, the value of the S is according to camera shooting Depending on head mould group characteristic commissioning.

4. focusing method according to claim 1, which is characterized in that the object pixel size according to the preservation with And motor position, it is calculated and matched first motor of the first object Pixel Dimensions of the acquisition by default computation rule The step of calculating position, comprising:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, are obtained when described The first object Pixel Dimensions taken be greater than the preservation object pixel size in maximum target Pixel Dimensions when, will with it is described The maximum motor position of maximum target pixel matching is as the first motor calculating position；

By the first motor calculating position being calculated towards the mobile preset safe distance S in remote burnt direction, and by motor Unidirectional part focusing direction is determined as nearly Jiao Fangxiang, adjusts motor position, completes this focusing, the value of the S is according to camera shooting Depending on head mould group characteristic commissioning.

5. focusing method according to claim 1, which is characterized in that the object pixel size according to the preservation with And motor position, it is calculated and matched first motor of the first object Pixel Dimensions of the acquisition by default computation rule The step of calculating position, comprising:

The first object Pixel Dimensions of the acquisition are compared with all object pixel sizes of the preservation, are obtained when described The first object Pixel Dimensions taken are greater than the third object pixel size in the object pixel size of the preservation, and are less than described It, will be with the matched third horse of the third object pixel size when the 4th object pixel size in the object pixel size of preservation Up to position as the first motor calculating position；

6. focusing method according to claim 1, which is characterized in that

In the case where the number of data pair meets the formation condition of matching relationship function, be calculated according to One motor calculating position adjusts motor position, and the step of completing this focusing includes:

7. a kind of mobile terminal, including camera module, the camera module includes the motor for focusing, and feature exists In the mobile terminal includes:

Fitting module, object pixel size and motor position when each focusing for being saved according to the processing module is completed It sets, and is fitted operation using preset algorithm, generate the matching relationship function of motor position and object pixel size；

Computing module, the matching relationship function for being generated according to the fitting module, is calculated first with the acquisition Object pixel size matched first motor calculating position；

Module is adjusted, the first motor calculating position for being calculated according to the computing module adjusts motor position, completes This focusing；

Wherein, the fitting module includes:

First fitting submodule, the data pair of object pixel size and motor position for saving the processing module Number is compared with the number N of the unknown number to fitting function, the value of the N according to it is selected to fitting function and Depending on the precision of first motor calculating position；

Second fitting submodule, for not meeting the formation condition of matching relationship function when the number of data pair is less than N；

The fitting module further include:

4th fitting submodule, for meeting the generation item of matching relationship function when the number of data pair is more than or equal to N Part then carries out least square fitting operation according to preset algorithm, obtains the value of each unknown number to fitting function；

5th is fitted submodule, each unknown number to fitting function for being obtained according to the 4th fitting submodule Value generates the matching relationship function of motor position and object pixel size；

The computing module includes:

First computational submodule, in the case where not meeting the formation condition of matching relationship function for the number in data pair, root The object pixel size and motor position saved according to the processing module is calculated by default computation rule and is obtained with described The first object Pixel Dimensions matched first motor calculating position taken；

Wherein, the processing module is further used for:

When each focusing is completed, a ratio r atio is calculated using the first formula；

8. mobile terminal according to claim 7, which is characterized in that first computational submodule includes:

First position determination unit, first object Pixel Dimensions and the preservation for obtaining the acquisition module it is all Object pixel size is compared, when the first object Pixel Dimensions of the acquisition and all object pixel sizes of the preservation In the second object pixel size it is identical when, will be with matched second motor position of the second object pixel size as first Motor calculating position；

The adjustment module includes:

The first adjustment submodule, the first motor calculating position for the first position determination unit to be calculated is towards nearly coke A preset safe distance S is moved in direction, and by the motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor This focusing is completed in position, and the value of the S is according to depending on camera module characteristic commissioning.

9. mobile terminal according to claim 7, which is characterized in that first computational submodule includes:

Second position determination unit, first object Pixel Dimensions and the preservation for obtaining the acquisition module it is all Object pixel size is compared, when the first object Pixel Dimensions of the acquisition are less than in the object pixel size of the preservation Minimum target Pixel Dimensions when, using with the minimum motor position of the minimum target pixel matching as the first motor calculate position It sets；

The adjustment module includes:

Second adjustment submodule, the first motor calculating position for the second position determination unit to be calculated is towards nearly coke A preset safe distance S is moved in direction, and by motor, unidirectionally locally focusing direction is determined as remote Jiao Fangxiang, adjusts motor position It sets, completes this focusing, the value of the S is according to depending on camera module characteristic commissioning.

10. mobile terminal according to claim 7, which is characterized in that first computational submodule includes:

The third place determination unit, first object Pixel Dimensions and the preservation for obtaining the acquisition module it is all Object pixel size is compared, when the first object Pixel Dimensions of the acquisition are greater than in the object pixel size of the preservation Maximum target Pixel Dimensions when, using with the maximum motor position of the maximum target pixel matching as the first motor calculate position It sets；

The adjustment module includes:

Third adjusting submodule, the first motor calculating position for the third place determination unit to be calculated is towards remote coke A preset safe distance S is moved in direction, and by motor, unidirectionally locally focusing direction is determined as nearly Jiao Fangxiang, adjusts motor position It sets, completes this focusing, the value of the S is according to depending on camera module characteristic commissioning.

11. mobile terminal according to claim 7, which is characterized in that first computational submodule includes:

4th position determination unit, first object Pixel Dimensions and the preservation for obtaining the acquisition module it is all Object pixel size is compared, when the first object Pixel Dimensions of the acquisition are greater than in the object pixel size of the preservation Third object pixel size, and be less than the preservation object pixel size in the 4th object pixel size when, will be with institute The matched third motor position of third object pixel size is stated as the first motor calculating position；

The adjustment module includes:

4th adjusting submodule, the first motor calculating position for the 4th position determination unit to be calculated is towards remote coke A preset safe distance S is moved in direction, and by motor, unidirectionally locally focusing direction is determined as nearly Jiao Fangxiang, adjusts motor position It sets, completes this focusing, the value of the S is according to depending on camera module characteristic commissioning.

12. mobile terminal according to claim 7, which is characterized in that

The adjustment module includes:

5th adjusting submodule, in the case where meeting the formation condition of matching relationship function for the number in data pair, by institute The first motor calculating position that computing module is calculated is stated towards the nearly burnt mobile preset safe distance S in direction, and by motor Unidirectional part focusing direction is determined as remote Jiao Fangxiang, adjusts motor position, completes this focusing, the value of the S is according to camera shooting Depending on head mould group characteristic commissioning.