CN105827944A

CN105827944A - Focusing method and mobile terminal

Info

Publication number: CN105827944A
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: 2016-08-03
Anticipated expiration: 2035-11-25
Also published as: CN105827944B

Abstract

The present invention provides a focusing method. The focusing method comprises the steps of obtaining the size of a target pixel and the position of a motor after the completion of each focusing process, storing the obtained information, generating a matching relation function between the position of the motor and the size of the target pixel according to the size of the target pixel and the position of the motor, obtaining the size of a first target pixel during the next focusing process, calculating to obtain a calculated position of a first motor matched with the size of the first target pixel according to the matching relation function, adjusting the position of the motor according to the calculated position of the first motor, and completing the current focusing process. The present invention also provides a corresponding mobile terminal. According to the focusing method, the matching relation function between the position of the motor and the size of the target pixel is simulated and generated based on the size of the target pixel and the position of the motor. Therefore, the calculated position of the first motor can be directly obtained during the next focusing process based on the matching relation function. Meanwhile, the focusing speed for photographing the same target object or the same object is improved. Moreover, the user experience is improved.

Description

A kind of focusing method and mobile terminal

Technical field

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

Background technology

Current mobile terminal camera is taken pictures and is increasingly pursued ultimate attainment Consumer's Experience, and wherein quickly capturing with moving object shooting is extremely common scene.

Current mobile terminal camera is after unlatching, change along with photographed scene, focus process is the most frequent, focusing speed is low, the commonly used a kind of mode based on contrast focusing of prior art, need to search out motor position during optimal focusing on whole motor stroke space, need repeatedly constantly attempt mobile motor position and calculate the contrast of image sampling point, time-consuming and power consumption is the biggest；Another kind of widely used focusing mode (PhaseDetectionAutoFocus based on phase place, PDAF), exist and damage image quality and situation about can not settle at one go, on the basis of the initial focusing position of PDAF, need also exist for adjusting motor position based on contrast and complete focusing；Depth finding based on multi-cam stereo vision is focused, and exists and needs to increase extra photographic head, and 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, and the position repeatedly moving motor to solve the focusing mode of prior art to need causes the time-consuming and problem of power consumption.

First aspect, the embodiment of the present invention provides a kind of focusing method, is applied to a mobile terminal, and described mobile terminal includes that photographic head module, described photographic head module include the motor for focusing, and described focusing method includes:

Obtain object pixel size when every time having focused and motor position and preserve；

Object pixel size when every time having focused according to described preservation and motor position, and utilize preset algorithm to be fitted computing, generate the matching relationship function of motor position and object pixel size；

Obtain the first object Pixel Dimensions next time focused；

Matching relationship function according to described generation, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates；

Calculate position according to described calculated first motor, adjust motor position, complete this focusing.

On the other hand, the embodiment of the present invention also provides for a kind of mobile terminal, and including photographic head module, described photographic head module includes the motor for focusing, and described mobile terminal includes:

Processing module, for obtaining object pixel size when having focused and motor position and preserving every time；

Fitting module, for object pixel size when having focused preserved according to described processing module and motor position every time, and utilizes preset algorithm to be fitted computing, generates the matching relationship function of motor position and object pixel size；

Acquisition module, for obtaining the first object Pixel Dimensions focused next time；

Computing module, for the matching relationship function generated according to described fitting module, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates；

Adjusting module, for calculating position according to calculated first motor of described computing module, adjusts motor position, completes this focusing.

So, in the focusing method of the embodiment of the present invention, carry out matching based on object pixel size when having focused and motor position every time and generate the matching relationship function between motor position and object pixel size, thus in upper once focus process, first object Pixel Dimensions according to this focusing is calculated the first motor and calculates position, adjust motor position, complete focusing.The focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, improves focusing speed when shooting same target object or same class object, improves Consumer's Experience.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in the description to the embodiment of the present invention is briefly described, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 represents the flow chart of the focusing method that the first embodiment of the present invention provides；

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

What Fig. 3 represented the mobile terminal that the third embodiment of the present invention provides forms structure chart substantially；

Fig. 4 represents the concrete structure figure of another mobile terminal that the third embodiment of the present invention provides；

Fig. 5 represents the concrete structure figure of another mobile terminal that the third embodiment of the present invention provides；

Fig. 6 represents the composition structure chart of the mobile terminal that the fourth embodiment of the present invention provides；

Fig. 7 represents the composition structure chart of the mobile terminal that the fifth embodiment of the present invention provides.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.

First embodiment

As it is shown in figure 1, the first embodiment of the present invention provides a kind of focusing method, being applied to a mobile terminal, described mobile terminal includes that photographic head module, described photographic head module include the motor for focusing, and described focusing method includes:

Step 101, obtains object pixel size when every time having focused and motor position and preserves.

In this step, when shooting photo success when having focused, after photographic head module is opened, the photographic head of its photographic head module can start, photographic head is the shooting area of this photographic head module towards position, photographic head module automatically can determine focusing area, and determine focus target in described focusing area in shooting area；This focus target can be with any object in focusing area, and such as face, automobile etc., be not especially limited at this.Focused by automatic center region after determining focus target or the focusing of manual touch-control realizes focusing, focused and successfully shot photo, then having obtained object pixel size and the motor position of photographic head module of focus target in this photo.

In the embodiment of the present invention, the motor position of photographic head module drives electric current to represent with it, i.e. realizes changing the position of motor by changing the size driving electric current.

The condition setting preserving data (object pixel size and motor position) is as follows: when this has been focused, motor position is compared with all motor positions preserved, if the motor position that acquired this has been focused is identical with the motor position preserved or the most close, the most do not preserve this motor position taken pictures and object pixel size.Concrete, total stroke of note motor is [0, J], to [0, J] carry out K decile (depending on the value of K is according to concrete photographic head module motor stroke size), such as obtain present motor position and the NHV (the history motor position value that position is nearest) in the motor position preserved, and calculate the absolute value of the difference of present motor positional value and NHV, obtain ratio r atio of this absolute value and motor stroke range value again, if ratio is less than a preset value ST, then show that new motor position and NHV are the most close or identical, the most do not preserve this motor position taken pictures and object pixel size.Described ratio r atio=(mo-NHV)/J；Wherein, mo is new motor position, if ratio < (J/K) (preset value), does not the most preserve this motor position taken pictures and object pixel size.

Step 102, according to object pixel size when having focused and the motor position of described preservation every time, and utilizes preset algorithm to be fitted computing, generates the matching relationship function of motor position and object pixel size.

In this step, object pixel size and motor position are as data to preserving, i.e. object pixel size preserves one to one with motor position.The purpose of this step is that to being fitted computing, multiple discrete data are obtained continuous print matching relationship function.

The fit approach of the matching relationship function of the embodiment of the present invention, it is adaptable to the focus target of any classification.It is to obtain based on the focus target that classification is " face " that one matching relationship function associates a class target, such as this matching relationship function, then this matching relationship function mates for " face "；Such as this matching relationship function is to obtain based on the focus target that classification is " XX object ", then this matching relationship function mates for " XX object ".

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

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

Step 104, according to the matching relationship function of described generation, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

In this step, first object Pixel Dimensions is substituted in described matching relationship function, thus the first motor obtaining mating with first object Pixel Dimensions calculates position.

Step 105, calculates position according to described calculated first motor, adjusts motor position, complete this focusing.

In this step, first motor is moved directly to the first motor and calculates position, first motor calculates the initial focusing position of the motor that position is this focusing, but there is certain deviation owing to the first motor calculates position with actual motor focusing position, the most also need to adjust motor position, the definition making this focus target focused meets predetermined condition, thus realizes this focusing.

In the embodiment of the present invention, after matching relationship Function Fitting completes, it is possible to realize a step focusing, the first motor will be moved to calculate behind position by motor, this focusing can be completed, it is not necessary to carry out focusing again and adjust.Due to the existence of this kind of situation, in the first embodiment of the present invention, after the first motor is moved to the first motor calculating position, the definition of current focus target need to be obtained；If its definition meets pre-conditioned, then without carrying out focusing adjustment, this has been focused；If its definition is unsatisfactory for pre-conditioned, then carrying out focusing and adjust, until the definition of focus target meets predetermined condition, this has been focused.

First enforcement of the present invention is generated the matching relationship function of motor position and object pixel size by matching, thus can quickly determine that in upper once focus process the first motor calculates position, and calculate position according to the first motor, adjust motor position and realize focusing, the focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and inefficient problem of focusing of power consumption, has raising focusing speed, realizes rapid focus.

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

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

When the number of data pair is more than or equal to N, meets the formation condition of matching relationship function, then carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function；

According to the value of described each unknown number treating fitting function obtained, generate the matching relationship function of motor position and object pixel size.

Described step 105 specifically includes:

Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

In the first embodiment of the present invention, before utilizing preset algorithm that object pixel size and motor position are fitted computing, need to first determine and treat fitting function, preferably, such as determine and treat that the fitting function form of Taylor expansion (use) is: f (x)=a+b (x-a)+c (x-a)²+d(x-a)³+e(x-a)⁴；Wherein, x represents object pixel size when having focused；F (x) represents that the first motor calculated calculates position.Such as during this treats fitting function, the number N value of unknown number is 5, respectively a, b, c, d, e；Then according to mathematical logic, 5 unknown numbers of demand, the most at least need 5 data pair, the most only when the number of the data pair preserved is more than or equal to 5, just meet matching and generate the condition of matching relationship function.

Its concrete approximating method is, according at least 5 data pair, utilizes method of least square to be fitted computing, respectively obtains the occurrence of a, b, c, d, e；Thus the occurrence of a, b, c, d, e is substituted into above-mentioned f (x)=a+b (x-a)+c (x-a)²+d(x-a)³+e(x-a)⁴In, i.e. can get the matching relationship function of motor position and object pixel size.

Further, after obtaining the first motor calculating position according to matching relationship function, the situation that position is not the final motor position of this focusing is calculated for the first motor, step 105 adjusts the step of motor position particularly as follows: motor is moved preset security distance S from the first motor position towards nearly burnt direction, this safe distance S, according to depending on photographic head module characteristic commissioning, does not make the restriction of occurrence at this.The most first motor is moved towards nearly burnt direction S, then moves to remote burnt direction, thus realize this focusing.Such as first motor position is 5, and S is equal to 0.5, is first reduced to 4.5 by 5, then tunes up, prevents toning.

In the first embodiment of the present invention being described in detail fit procedure, the method for least square, the Taylor expansion that are directed to are presently preferred embodiments of the present invention, are not used in the protection domain limiting the application；Other volume approximating methods are equally applicable to the application, repeat the most one by one at this.

Along with being on the increase of number of data pair in the first embodiment of the present invention, after the matching relationship Function Fitting of motor position and object pixel size completes, need not continue to preserve motor position when having focused and object pixel size, follow-up focus process directly utilizes the matching relationship function that matching completes and obtains motor position.Completing as well as matching relationship function matching, the motor position preserved and object pixel size the most in all senses, in order to save the memory space of mobile terminal, are then deleted, and are terminated fit procedure by the motor position the most preserved and object pixel size.

In the embodiment of the present invention, concrete judges whether matching relationship function terminates the method for matching and be: according to matching relationship function f (x) simulated, and is calculated the first motor mated with object pixel size when having focused and calculates position f (x_i)；First motor is calculated position f (x_i) with focused time object pixel size actual motor position P_i(all motor positions when focusing the most preserved completes) carry out comparison one by one, obtain absolute difference: Δ x_i=abs (f (x_i)-P_i)；Add up all calculated motor position f (x_i) and actual motor position P_iThe meansigma methods of absolute difference:(wherein: m is the number of the focusing preserved motor position data when completing), ifThen terminating matching, and delete all data for matching, wherein δ is the threshold value of a system intialization, and concrete value is fixed according to the overall stroke range [0, J] of focusing motor.

In the embodiment of the present invention, by preserving motor position and the object pixel size of photographic head module when having focused every time, when having focused, all determine an independent variable and the discrete respective value of functional value of this functional relationship every time.Utilizing the discrete data preserved to simulating linear or nonlinear functional relationship according to existing Function Fitting technology, when the number of discrete data pair meets certain requirements, the Function Fitting of single independent variable can obtain the fitting effect of optimum.

In the embodiment of the present invention, in order to save the memory space of mobile terminal, can regularly clear up the data that a part is not used again for a long time, such as user removes snow mountain, shoot the photo of a snow mountain, then can store each Pixel Dimensions of snow mountain and the corresponding relation of optimal position of focusing.And hereafter 1 year, 2 years time the most longer, shot snow mountain with not reusing this photographic head module per family, therefore user can manually delete its data about snow mountain, to ensure the abundance of the memory space of mobile terminal.Other, it is possible to cycle of correspondence is set reaches to delete without the purpose of data by arranging an aging device of timing for each focus target image.

By object pixel size when having focused and motor position matching are generated matching relationship function every time in the first embodiment of the present invention, thus upper once focus time can directly determine motor position according to the Pixel Dimensions of focus target, the purpose of focusing is realized again by adjusting motor position, the focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, the matching relationship function generated according to institute's matching, can quickly be calculated motor position, improve focusing speed when shooting same target object or same class object, improve Consumer's Experience.

To sum up, the first embodiment of the present invention is mainly for matching generating the application scenarios of matching relationship function, and for without generating matching relationship function or temporarily cannot generate the application scenarios of matching relationship function, the embodiment of the present invention also provides for one second embodiment.

Second embodiment

As shown in Figure 2, the second embodiment of the present invention provides a kind of focusing method, it is applied to a mobile terminal, described mobile terminal includes photographic head module, described photographic head module includes the motor for focusing, and this second embodiment is applied to the number of the data pair of object pixel size and the motor position preserved and is applied to obtain the first motor without fitting function according only to the object pixel size preserved and motor position calculates the situation of position less than situation or this second embodiment of number N of the unknown number treating fitting function.

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

Step 201, obtains object pixel size when every time having focused and motor position and preserves.

In the embodiment of the present invention, for the application scenarios without carrying out Function Fitting, if object pixel size when completing all focusings and motor position all preserve, the data volume preserved can be caused the biggest, and there are a large amount of repetition or close data, cause the waste of data.In the embodiment of the present invention, for new once focusing, when focusing completes, motor position is compared with all motor positions preserved, if new motor position is identical with the motor position preserved or the most close, the most do not preserve this motor position taken pictures and object pixel size.Concrete, total stroke of note motor is [0, J], to [0, J] carry out K decile (depending on the value of K is according to concrete photographic head module motor stroke size), such as obtain present motor position and the NHV (the history motor position value that position is nearest) in the motor position preserved, and calculate the difference of present motor positional value and NHV, obtain ratio r atio of this difference and motor stroke range value again, if ratio is less than a preset value ST, then show that new motor position and NHV are the most close or identical, the most do not preserve this motor position taken pictures and object pixel size.I.e. ratio r atio=(mo-NHV)/J；Wherein, mo is new motor position, if ratio < (J/K) (preset value), does not the most preserve this motor position taken pictures and object pixel size.

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

Step 203, according to object pixel size and the motor position of described preservation, obtains, by default computation rule, the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Owing in the second embodiment of the present invention, non-matching generates matching relationship function, then the first motor calculating position cannot be according to matching relationship function, then this second embodiment obtains the first motor by step 203 and calculates position, i.e. calculates position by discrete data to calculating the first motor.

Step 204, calculates position according to described calculated first motor, adjusts motor position, complete this focusing.

Concrete, by discrete data, the method calculating the first motor calculating position is broadly divided into four kinds of situations, separately below these four situation is described in detail:

Situation one: described step 203 specifically includes:

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the second object pixel in the first object Pixel Dimensions of described acquisition with all object pixel sizes of described preservation is equivalently-sized, the second motor position mated with described second object pixel size is calculated position as the first motor.

This situation is once, first object Pixel Dimensions is exactly equal in the object pixel size preserved, then equal with first object Pixel Dimensions motor position corresponding to object pixel size that preserve then calculates position for the first motor corresponding with first object Pixel Dimensions.

Preferably, described step 204 specifically includes:

Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction, and focusing direction, unidirectional for described motor local is defined as remote burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

In this step, after obtaining the first motor calculating position according to step 203, the situation that position is not the final motor position of this focusing is calculated for the first motor, step 205 adjusts the step of motor position particularly as follows: motor is moved preset security distance S from the first motor position along nearly burnt direction, this safe distance S, according to depending on photographic head module characteristic commissioning, does not make the restriction of occurrence at this.The most first motor is moved towards nearly burnt direction S, then moves to remote burnt direction, thus realize this focusing.Such as first motor position is 5, and S is equal to 0.5, is first reduced to 4.5 by 5, then tunes up, prevents toning.

Situation two: described step 203 specifically includes:

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the first object Pixel Dimensions of described acquisition is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, the minimum motor position with described minimum target pixel matching is calculated position as the first motor.

This situation two times, first object Pixel Dimensions is the most unequal with any one in the object pixel size preserved, and this first object Pixel Dimensions is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, then as the first motor mated with first object Pixel Dimensions, minimum motor position corresponding for minimum target Pixel Dimensions is calculated position.

Preferably, described step 204 specifically includes:

Situation three: described step 203 specifically includes:

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, the maximum motor position with described maximum target pixel matching is calculated position as the first motor.

This situation three times, first object Pixel Dimensions is the most unequal with any one in the object pixel size preserved, and this first object Pixel Dimensions is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, then as the first motor mated with first object Pixel Dimensions, maximum motor position corresponding for maximum target Pixel Dimensions is calculated position.

Preferably, described step 204 specifically includes:

Described calculated first motor is calculated position and moves a preset safe distance S towards remote burnt direction, and focusing direction, unidirectional for motor local is defined as nearly burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

In this step, after obtaining the first motor calculating position according to step 203, the situation that position is not the final motor position of this focusing is calculated for the first motor, step 205 adjusts the step of motor position particularly as follows: motor is moved preset security distance S from the first motor position along remote burnt direction, this safe distance S, according to depending on photographic head module characteristic commissioning, does not make the restriction of occurrence at this.The most first motor is moved towards remote burnt direction S, then moves to nearly burnt direction, thus realize this focusing.Such as first motor position is 5, and S is equal to 0.5, first increases to 5.5 by 5, then turns down, prevents toning.

Situation four: described step 203 specifically includes:

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the 3rd object pixel size in the object pixel size of described preservation, and when being less than the 4th object pixel size in the object pixel size of described preservation, the 3rd motor position mated with described 3rd object pixel size is calculated position as the first motor.

This situation four times, first object Pixel Dimensions is the most unequal with any one in the object pixel size preserved, and this first object Pixel Dimensions is placed exactly between the 3rd object pixel size and the 4th object pixel size, the most now the 3rd corresponding for the 3rd object pixel size motor position is calculated position as the first motor mated with first object Pixel Dimensions；Or the 4th corresponding for the 4th object pixel size motor position is calculated position as the first motor mated with first object Pixel Dimensions.

In the embodiment of the present invention, during using the 3rd corresponding for the 3rd object pixel size motor position as the first motor calculating position mated with first object Pixel Dimensions, described step 204 specifically includes:

In this step, after obtaining the first motor calculating position according to step 203, the situation that position is not the final motor position of this focusing is calculated for the first motor, step 204 adjusts the step of motor position particularly as follows: motor is moved preset security distance S from the first motor position along nearly burnt direction, this safe distance S, according to depending on photographic head module characteristic commissioning, does not make the restriction of occurrence at this.The most first motor is moved towards nearly burnt direction S, then moves to remote burnt direction, thus realize this focusing.Such as first motor position is 5, and S is equal to 0.5, is first reduced to 4.5 by 5, then tunes up, prevents toning.

In the embodiment of the present invention, during using the 4th corresponding for the 4th object pixel size motor position as the first motor calculating position mated with first object Pixel Dimensions, step 204 includes:

Described motor is calculated position towards remote burnt direction from described calculated first motor and moves a preset safe distance S, and focusing direction, unidirectional for motor local is defined as nearly burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

In this step, after obtaining the first motor calculating position according to step 203, the situation that position is not the final motor position of this focusing is calculated for the first motor, step 204 adjusts the step of motor position particularly as follows: motor is moved preset security distance S from the first motor position along remote burnt direction, this safe distance S, according to depending on photographic head module characteristic commissioning, does not make the restriction of occurrence at this.The most first motor is moved towards remote burnt direction S, then moves to nearly burnt direction, thus realize this focusing.Such as first motor position is 5, and S is equal to 0.5, first increases to 5.5 by 5, then turns down, prevents toning.

The second embodiment of the present invention is applicable not only to the application scenarios that the number of data pair is unsatisfactory for the condition of matching, applies also for the application scenarios without carrying out Function Fitting, concrete, it is not necessary to the application scenarios carrying out Function Fitting is as follows:

Obtain object pixel size when every time having focused and motor position and preserve, the first object Pixel Dimensions that directly acquisition is focused next time afterwards, the most accordingly any one situation in one to situation four determines that first motor corresponding with first object Pixel Dimensions calculates position；Calculate position finally according to the first motor, adjust motor position, complete this focusing.

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

To sum up, the process of specifically taking pictures of the present invention is as follows: receiving the photographing instruction of user, the photographing instruction of user can be inputted by modes such as virtual key, physical button, gesture, sound；Detect the number of the data pair of object pixel size and the motor position preserved；Judge that whether number M of described data pair is more than or equal to N；If the number of data pair is more than or equal to N, then show that matching relationship Function Fitting completes, be calculated the first motor according to described matching relationship function and calculate position；If number M of data pair is less than N, then show that the non-matching of matching relationship function completes, then interpolation calculation the first motor calculates position；Concrete, M=0 (numbers of data pair), does not do any operation, keeps the current state of motor；If 0 < M < N (N=5), according to the object pixel size in current preview frame, the object pixel size preserved and the data centering object pixel size of motor position compare, and arrange an initial motor position according to contrast situation and present motor position.

Such as: preserved two groups of object pixel size-motor position data pair: (t1-m1) and (t2-m2), and t1 < t2.In current preview frame, object pixel size=t0 then divides three kinds of situations to arrange the motor position of camera lens module voice coil motor:

During a.t0 > t2, motor position=m2+deta is set_t, wherein deta_tIt is 2 one to adjust safely space (presetting), because of a fixed value depending on different camera lens module motor current value value ranges.And make motor position adjust to little value direction；(5 are first added to 5.5, then turn down, prevent toning)

B.t1 < t0 < during t2, arranges motor position=t1-deta_t, and make motor position adjust to big value direction；

C.t0 < during t1, arranges motor position=t1+deta_t, and make motor position adjust to little value direction.

After finally motor is moved to the first motor calculating position, adjust motor position, it is achieved this focusing.

The second embodiment of the present invention is by preserving object pixel size when having focused and the data pair of motor position every time, thus in upper once focus process, position is calculated according to the first motor that default computation rule is calculated the first object Pixel Dimensions of this focusing corresponding, adjust motor position, complete focusing.The focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, according to default computation rule, can quickly obtain motor position, eliminate the process of matching adaptation function, further speed up the speed of focusing, improve Consumer's Experience.

3rd embodiment

As it is shown on figure 3, third embodiment of the invention provides a kind of mobile terminal 300, including photographic head module, described photographic head module includes the motor for focusing, and described mobile terminal 300 includes:

Processing module 301, for obtaining object pixel size when having focused and motor position and preserving every time.

Fitting module 302, for object pixel size when having focused preserved according to described processing module 301 and motor position every time, and utilizes preset algorithm to be fitted computing, generates the matching relationship function of motor position and object pixel size.

Acquisition module 303, for obtaining the first object Pixel Dimensions focused next time.

Computing module 304, for the matching relationship function generated according to described fitting module 302, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Adjusting module 305, for calculating position according to calculated first motor of described computing module 304, adjusts motor position, completes this focusing.

Further, as shown in Figure 4, described fitting module 302 specifically includes:

3rd matching submodule 3021, for the number of the data pair of the object pixel size of described preservation and motor position is compared with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function prototype and the first motor calculating position.

4th matching submodule 3022, for when the number of data pair is more than or equal to N, meeting the formation condition of matching relationship function, then carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function.

5th matching submodule 3023, the value of each unknown number treating fitting function for obtaining described in basis, generate the matching relationship function of motor position and object pixel size.

Preferably, described adjusting module 305 specifically includes:

5th adjusts submodule 3051, a preset safe distance S is moved towards nearly burnt direction for described calculated first motor is calculated position, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

The third embodiment of the present invention generates the matching relationship function of motor position and object pixel size by matching, thus in upper once focus process, directly calculate the first motor by matching relationship function calculate position, and complete focusing by adjusting motor position, the focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, having raising focusing speed, realize rapid focus, the candid photograph improving user is experienced.

Mobile terminal shown in Fig. 4 is the mobile terminal of the focusing method applying above-mentioned first embodiment to provide, and all embodiments of the focusing method that the most above-mentioned first embodiment provides all are applicable to this mobile terminal.

Further, as it is shown in figure 5, the 3rd embodiment of the embodiment of the present invention also provides for another kind of mobile terminal 400, including:

Processing module 401, for obtaining object pixel size when having focused and motor position and preserving every time.

Fitting module 402, for object pixel size when having focused preserved according to described processing module 401 and motor position every time, and utilizes preset algorithm to be fitted computing, generates the matching relationship function of motor position and object pixel size.

Acquisition module 403, for obtaining the first object Pixel Dimensions focused next time.

Computing module 404, for the matching relationship function generated according to described fitting module 402, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Adjusting module 405, for calculating position according to calculated first motor of described computing module 404, adjusts motor position, completes this focusing.

Preferably, described fitting module 402 specifically includes:

First matching submodule 4021, compare with number N of the unknown number treating fitting function for the number of the object pixel size that described processing module 401 is preserved and the data pair of motor position, depending on the value of described N is according to the selected precision treating fitting function and the first motor calculating position.

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

The most described computing module 404 includes:

First calculating sub module 4041, for the object pixel size preserved according to described processing module 401 and motor position, is calculated, by default computation rule, the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Preferably, described first calculating sub module 4041 specifically includes:

Primary importance determines unit 40411, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module 403 with described preservation are compared, when the second object pixel in the first object Pixel Dimensions of described acquisition with all object pixel sizes of described preservation is equivalently-sized, the second motor position mated with described second object pixel size is calculated position as the first motor.

Preferably, described adjusting module 405 specifically includes:

First adjusts submodule 4051, a preset safe distance S is moved towards nearly burnt direction for described calculated first motor is calculated position, and focusing direction, unidirectional for described motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Preferably, described first calculating sub module 4041 specifically includes:

The second position determines unit 40412, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module 403 with described preservation are compared, when the first object Pixel Dimensions of described acquisition is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, the minimum motor position with described minimum target pixel matching is calculated position as the first motor.

Preferably, described adjusting module 405 specifically includes:

Second adjusts submodule 4052, a preset safe distance S is moved towards nearly burnt direction for described calculated first motor is calculated position, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Preferably, described first calculating sub module 4041 specifically includes:

3rd position determination unit 40413, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module 403 with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, the maximum motor position with described maximum target pixel matching is calculated position as the first motor.

Preferably, described adjusting module 405 specifically includes:

3rd adjusts submodule 4053, a preset safe distance S is moved towards remote burnt direction for described calculated first motor is calculated position, and focusing direction, unidirectional for motor local is defined as nearly burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Preferably, described first calculating sub module 4041 specifically includes:

4th position determination unit 40414, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module 403 with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the 3rd object pixel size in the object pixel size of described preservation, and when being less than the 4th object pixel size in the object pixel size of described preservation, the 3rd motor position mated with described 3rd object pixel size is calculated position as the first motor.

Preferably, described adjusting module 405 specifically includes:

4th adjusts submodule 4054, a preset safe distance S is moved towards nearly burnt direction for described calculated first motor is calculated position, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

The another kind of mobile terminal that the third embodiment of the present invention provides is the mobile terminal of the focusing method that above-mentioned second embodiment of application provides, and all embodiments of the focusing method that the most above-mentioned second embodiment provides all are applicable to this mobile terminal.

The mobile terminal of the embodiment of the present invention is capable of each process that in the embodiment of the method for Fig. 1 to Fig. 2, mobile terminal realizes, and for avoiding repeating, repeats no more here.The mobile terminal of the embodiment of the present invention is by above-mentioned module, matching relationship function or default computation rule is generated according to object pixel size and motor position matching, upper once focus time can directly determine motor position according to the Pixel Dimensions of focus target, the purpose of focusing is realized again by adjusting motor position, the focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, the matching relationship function generated according to institute's matching, can quickly be calculated motor position, improve focusing speed when shooting same target object or same class object, improve Consumer's Experience.

4th embodiment

Further, it is the block diagram of mobile terminal of fourth embodiment of the invention as shown in Figure 6.Mobile terminal 500 shown in Fig. 6 includes: at least one processor 501, memorizer 502, at least one network interface 504 and other user interfaces 503.Each assembly in mobile terminal 500 is coupled by bus system 505.It is understood that bus system 505 is for realizing the connection communication between these assemblies.Bus system 505, in addition to including data/address bus, also includes power bus, controls bus and status signal bus in addition.But for the sake of understanding explanation, in figure 6 various buses are all designated as bus system 505.

Wherein, user interface 503 can include that (such as, mouse, trace ball (trackball), touch-sensitive plate or touch screen, photographic head module etc., described photographic head module includes the motor for focusing for display, keyboard or pointing device.

The memorizer 502 being appreciated that in the embodiment of the present invention can be volatile memory or nonvolatile memory, maybe can include volatibility and nonvolatile memory.And memorizer 502 is for preserving object pixel size and motor position and treating number N of unknown number of fitting function, preset safe distance S etc. be there is a need to value and the constant of preservation.Wherein, nonvolatile memory can be read only memory (Read-OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), Erasable Programmable Read Only Memory EPROM (ErasablePROM, EPROM), Electrically Erasable Read Only Memory (ElectricallyEPROM, EEPROM) or flash memory.Volatile memory can be random access memory (RandomAccessMemory, RAM), and it is used as External Cache.nullBy exemplary but be not restricted explanation，The RAM of many forms can use，Such as static RAM (StaticRAM，SRAM)、Dynamic random access memory (DynamicRAM，DRAM)、Synchronous Dynamic Random Access Memory (SynchronousDRAM，SDRAM)、Double data speed synchronous dynamic RAM (DoubleDataRateSDRAM，DDRSDRAM)、Enhancement mode Synchronous Dynamic Random Access Memory (EnhancedSDRAM，ESDRAM)、Synchronized links dynamic random access memory (SynchlinkDRAM，And direct rambus random access memory (DirectRambusRAM SLDRAM)，DRRAM).The memorizer 502 of the system and method that the embodiment of the present invention describes is intended to include but not limited to these and the memorizer of other applicable type any.

In some embodiments, memorizer 502 stores following element, executable module or data structure, or their subset, or their superset: operating system 5021 and application program 5022.Memorizer 502 is additionally operable to store for preserving object pixel size and motor position and treating number N of unknown number of fitting function, and preset safe distance S etc. be there is a need to value and the constant of preservation.

Wherein, operating system 5021, comprise various system program, such as ccf layer, core library layer, driving layer etc., be used for realizing various basic business and processing hardware based task.Application program 5022, comprises various application program, and such as media player (MediaPlayer), browser (Browser) etc., be used for realizing various applied business.The program realizing embodiment of the present invention method may be embodied in application program 5022.

In embodiments of the present invention, by calling program or the instruction of memorizer 502 storage, concrete, can be program or the instruction of storage in application program 5022, the photographic head module in user interface 503 be for obtaining object pixel size when having focused and motor position and preserving to memorizer 502 every time；Processor 501 is according to object pixel size when having focused preserved in described memorizer 502 and motor position every time, and utilizes preset algorithm to be fitted computing, generates the matching relationship function of motor position and object pixel size；Photographic head module in user interface 503 obtains the first object Pixel Dimensions next time focused；Processor 501, according to the matching relationship function of described generation, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates；The photographic head module of user interface 503 calculates position according to described calculated first motor, adjusts motor position, completes this focusing.

The method that the invention described above embodiment discloses can apply in processor 501, or is realized by processor 501.Processor 501 is probably a kind of IC chip, has the disposal ability of signal.During realizing, each step of said method can be completed by the instruction of the integrated logic circuit of the hardware in processor 501 or software form.Above-mentioned processor 501 can be general processor, digital signal processor (DigitalSignalProcessor, DSP), special IC (ApplicationSpecificIntegratedCircuit, ASIC), ready-made programmable gate array (FieldProgrammableGateArray, FPGA) or other PLDs, discrete gate or transistor logic, discrete hardware components.Can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.The processor etc. that general processor can be microprocessor or this processor can also be any routine.Hardware decoding processor can be embodied directly in conjunction with the step of the method disclosed in the embodiment of the present invention to have performed, or combine execution by the hardware in decoding processor and software module and complete.Software module may be located at random access memory, flash memory, read only memory, in the storage medium that this area such as programmable read only memory or electrically erasable programmable memorizer, depositor is ripe.This storage medium is positioned at memorizer 502, and processor 501 reads the information in memorizer 502, completes the step of said method in conjunction with its hardware.

It is understood that these embodiments that the embodiment of the present invention describes can realize by hardware, software, firmware, middleware, microcode or a combination thereof.nullHardware is realized，Processing unit can be implemented in one or more special IC (ApplicationSpecificIntegratedCircuits，ASIC)、Digital signal processor (DigitalSignalProcessing，DSP)、Digital signal processing appts (DSPDevice，DSPD)、Programmable logic device (ProgrammableLogicDevice，PLD)、Field programmable gate array (Field-ProgrammableGateArray，FPGA)、General processor、Controller、Microcontroller、Microprocessor、In other electronic unit performing herein described function or a combination thereof.

Software is realized, the technology described in the embodiment of the present invention can be realized by performing the module (such as process, function etc.) of function described in the embodiment of the present invention.Software code is storable in performing in memorizer and by processor.Memorizer can within a processor or realize outside processor.

Alternatively, as another embodiment, processor 501 is additionally operable to the number of data pair of object pixel size and the motor position preserved by described memorizer 502 and compares with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function prototype and the first motor calculating position；When the number of data pair is less than N, do not meet the formation condition of matching relationship function, then according to object pixel size and the motor position of described preservation, obtain, by default computation rule, the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Alternatively, as another embodiment, processor 501 is additionally operable to the number of data pair of object pixel size and the motor position preserved by described memorizer 502 and compares with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function and the first motor calculating position；When the number of data pair is more than or equal to N, carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function；According to the value of described each unknown number treating fitting function obtained, generate the matching relationship function of motor position and object pixel size；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by the photographic head module of user interface 503, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, the first object Pixel Dimensions that processor 501 is additionally operable to the photographic head module of described user interface 503 obtains is compared with all object pixel sizes that described memorizer 502 preserves, when the first object Pixel Dimensions of described acquisition is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, the minimum motor position with described minimum target pixel matching is calculated position as the first motor；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by the photographic head module of user interface 503, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, the first object Pixel Dimensions that processor 501 is additionally operable to the photographic head module of described user interface 503 obtains is compared with all object pixel sizes that described memorizer 502 preserves, when the first object Pixel Dimensions of described acquisition is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, the maximum motor position with described maximum target pixel matching is calculated position as the first motor；Described calculated first motor is calculated position and moves a preset safe distance S towards remote burnt direction by the photographic head module of user interface 503, and focusing direction, unidirectional for motor local is defined as nearly burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, the first object Pixel Dimensions that processor 501 is additionally operable to the photographic head module of described user interface 503 obtains is compared with all object pixel sizes that described memorizer 502 preserves, when the first object Pixel Dimensions of described acquisition is more than the 3rd object pixel size in the object pixel size of described preservation, and when being less than the 4th object pixel size in the object pixel size of described preservation, the 3rd motor position mated with described 3rd object pixel size is calculated position as the first motor；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by the photographic head module of user interface 503, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, processor 501 is additionally operable to the number of data pair of object pixel size and the motor position preserved by described memorizer 502 and compares with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function prototype and the first motor calculating position；When the number of data pair is more than or equal to N, meets the formation condition of matching relationship function, then carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function；According to the value of described each unknown number treating fitting function obtained, generate the matching relationship function of motor position and object pixel size；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by the photographic head module of user interface 503, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Mobile terminal 500 is capable of each process that in previous embodiment, mobile terminal realizes, and for avoiding repeating, repeats no more here.The mobile terminal of the embodiment of the present invention is by above-mentioned module, matching relationship function or default computation rule is generated according to object pixel size and motor position matching, upper once focus time can directly determine motor position according to the Pixel Dimensions of focus target, the purpose of focusing is realized again by adjusting motor position, the focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, the matching relationship function generated according to institute's matching, can quickly be calculated motor position, improve focusing speed when shooting same target object or same class object, improve Consumer's Experience.

5th embodiment

As it is shown in fig. 7, mobile terminal 600 can be the communication equipment that mobile phone, panel computer, personal digital assistant (PersonalDigitalAssistant, PDA) or vehicle-mounted computer etc. have RF circuit 610.

Mobile terminal 600 in Fig. 7 includes radio frequency (RadioFrequency, RF) circuit 610, memorizer 620, input block 630, display unit 640, photographic head module 650, processor 660, voicefrequency circuit 670, WiFi (WirelessFidelity) module 680 and power supply 690.

Wherein, input block 630 can be used for receiving numeral or the character information of user's input, and produces the signal input relevant with the user setup of mobile terminal 600 and function control.Specifically, in the embodiment of the present invention, this input block 630 can include contact panel 631.Contact panel 631, also referred to as touch screen, user can be collected thereon or neighbouring touch operation (such as user uses any applicable object such as finger, stylus or adnexa operation on contact panel 631), and drive corresponding attachment means according to formula set in advance.Optionally, contact panel 631 can include touch detecting apparatus and two parts of touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect the signal that touch operation brings, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, then gives this processor 660, and can receive order that processor 660 sends and be performed.Furthermore, it is possible to use the polytypes such as resistance-type, condenser type, infrared ray and surface acoustic wave to realize contact panel 631.Except contact panel 631, input block 630 can also include other input equipments 632, and other input equipments 632 can include but not limited to one or more in physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..

Wherein, display unit 640 can be used for showing the information inputted by user or the information being supplied to user and the various menu interfaces of mobile terminal 600.Display unit 640 can include display floater 641, optionally, the form such as LCD or Organic Light Emitting Diode (OrganicLight-EmittingDiode, OLED) can be used to configure display floater 641.

In embodiments of the present invention, by calling the data in the software program and/or module and/or this second memory 622 stored in this first memory 621, first memory 621 and/or second memory 622 are for preserving object pixel size and motor position and treating number N of unknown number of fitting function, and preset safe distance S etc. be there is a need to value and the constant of preservation.Photographic head module 650 is for obtaining object pixel size when having focused and motor position and preserving every time；Processor 660 is for object pixel size when having focused according to described preservation and motor position every time, and utilizes preset algorithm to be fitted computing, generates the matching relationship function of motor position and object pixel size；Obtain the first object Pixel Dimensions next time focused；Matching relationship function according to described generation, is calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates；Calculate position according to described calculated first motor, adjust motor position, complete this focusing.

Alternatively, as another embodiment, processor 660 is additionally operable to compare the object pixel size of described preservation and the number of data pair of motor position with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function prototype and the first motor calculating position；When the number of data pair is less than N, do not meet the formation condition of matching relationship function, then according to object pixel size and the motor position of described preservation, obtain, by default computation rule, the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Alternatively, as another embodiment, processor 660 is additionally operable to compare the object pixel size of described preservation and the number of data pair of motor position with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function and the first motor calculating position；When the number of data pair is more than or equal to N, carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function；According to the value of described each unknown number treating fitting function obtained, generate the matching relationship function of motor position and object pixel size；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by photographic head module 650, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, processor 660 is additionally operable to compare all object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation, when the first object Pixel Dimensions of described acquisition is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, the minimum motor position with described minimum target pixel matching is calculated position as the first motor；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by photographic head module 650, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, processor 660 is additionally operable to compare all object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation, when the first object Pixel Dimensions of described acquisition is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, the maximum motor position with described maximum target pixel matching is calculated position as the first motor；Described calculated first motor is calculated position and moves a preset safe distance S towards remote burnt direction by photographic head module 650, and focusing direction, unidirectional for motor local is defined as nearly burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, processor 660 is additionally operable to compare all object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation, when the first object Pixel Dimensions of described acquisition is more than the 3rd object pixel size in the object pixel size of described preservation, and when being less than the 4th object pixel size in the object pixel size of described preservation, the 3rd motor position mated with described 3rd object pixel size is calculated position as the first motor；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by photographic head module 650, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

Alternatively, as another embodiment, processor 660 is additionally operable to compare the object pixel size of described preservation and the number of data pair of motor position with number N of the unknown number treating fitting function, depending on the value of described N is according to the selected precision treating fitting function prototype and the first motor calculating position；When the number of data pair is more than or equal to N, meets the formation condition of matching relationship function, then carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function；According to the value of described each unknown number treating fitting function obtained, generate the matching relationship function of motor position and object pixel size；Described calculated first motor is calculated position and moves a preset safe distance S towards nearly burnt direction by photographic head module 650, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjusting motor position, complete this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

It should be noted that, contact panel 631 can cover display floater 641, formed and touch display screen, when this touch display screen detects thereon or after neighbouring touch operation, send processor 660 to determine the type of touch event, display screen on provide corresponding visual output according to the type of touch event touching with preprocessor 660.

Touch display screen and include Application Program Interface viewing area and conventional control viewing area.The arrangement mode of this Application Program Interface viewing area and this conventional control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish the arrangement mode of two viewing areas.This Application Program Interface viewing area is displayed for the interface of application program.Each interface can comprise the interface elements such as icon and/or the widget desktop control of at least one application program.This Application Program Interface viewing area can also be the empty interface not comprising any content.This conventional control viewing area is for showing the control that utilization rate is higher, such as, and the application icon etc. such as settings button, interface numbering, scroll bar, phone directory icon.

Wherein processor 660 is the control centre of mobile terminal 600, utilize various interface and the various piece of the whole mobile phone of connection, it is stored in the software program in first memory 621 and/or module by running or performing, and call the data being stored in second memory 622, perform the various functions of mobile terminal 600 and process data, thus mobile terminal 600 is carried out integral monitoring.Optionally, processor 660 can include one or more processing unit.

Those of ordinary skill in the art are it is to be appreciated that combine unit and the algorithm steps of each example that the disclosed embodiments in the embodiment of the present invention describe, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use different methods to realize described function to each specifically should being used for, but this realization is it is not considered that beyond the scope of this invention.

Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, it is referred to the corresponding process in preceding method embodiment, does not repeats them here.The mobile terminal of the embodiment of the present invention is by above-mentioned module, matching relationship function or default computation rule is generated according to object pixel size and motor position matching, upper once focus time can directly determine motor position according to the Pixel Dimensions of focus target, the purpose of focusing is realized again by adjusting motor position, the focusing mode solving prior art needs the position repeatedly moving motor to cause the time-consuming and problem of power consumption, the matching relationship function generated according to institute's matching, can quickly be calculated motor position, improve focusing speed when shooting same target object or same class object, improve Consumer's Experience.

In embodiment provided herein, it should be understood that disclosed apparatus and method, can realize by another way.Such as, device embodiment described above is only schematically, such as, the division of described unit, be only a kind of logic function to divide, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, device or unit or communication connection, can be electrical, machinery or other form.

The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, i.e. may be located at a place, or can also be distributed on multiple NE.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.

It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.

If described function is using the form realization of SFU software functional unit and as independent production marketing or use, can be stored in a computer read/write memory medium.Based on such understanding, part or the part of this technical scheme that prior art is contributed by technical scheme the most in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium includes: the various media that can store program code such as USB flash disk, portable hard drive, ROM, RAM, magnetic disc or CDs.

The above; being only the detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.

Claims

1. a focusing method, is applied to a mobile terminal, and described mobile terminal includes that photographic head module, described photographic head module include the motor for focusing, it is characterised in that described focusing method includes:

Obtain the first object Pixel Dimensions next time focused；

Focusing method the most according to claim 1, it is characterized in that, described object pixel size when every time having focused according to described preservation and motor position, and utilize preset algorithm to be fitted computing, generate the step of motor position and the matching relationship function of object pixel size, including:

When the number of data pair is less than N, not meeting the formation condition of matching relationship function, the most described matching relationship function according to described generation, the step being calculated the first motor calculating position that the first object Pixel Dimensions with described acquisition mates is:

Object pixel size according to described preservation and motor position, be calculated, by default computation rule, the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Focusing method the most according to claim 2, it is characterized in that, the described object pixel size according to described preservation and motor position, be calculated the step of the first motor calculating position that the first object Pixel Dimensions with described acquisition mates by default computation rule, including:

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the second object pixel in the first object Pixel Dimensions of described acquisition with all object pixel sizes of described preservation is equivalently-sized, the second motor position mated with described second object pixel size is calculated position as the first motor；

Described according to described calculated first motor calculating position, adjust motor position, complete this step focused and include:

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the first object Pixel Dimensions of described acquisition is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, the minimum motor position with described minimum target pixel matching is calculated position as the first motor；

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, the maximum motor position with described maximum target pixel matching is calculated position as the first motor；

All object pixel sizes of the first object Pixel Dimensions of described acquisition with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the 3rd object pixel size in the object pixel size of described preservation, and when being less than the 4th object pixel size in the object pixel size of described preservation, the 3rd motor position mated with described 3rd object pixel size is calculated position as the first motor；

According to the value of described each unknown number treating fitting function obtained, generate the matching relationship function of motor position and object pixel size；

8. a mobile terminal, including photographic head module, described photographic head module includes the motor for focusing, it is characterised in that described mobile terminal includes:

Mobile terminal the most according to claim 8, it is characterised in that described fitting module includes:

First matching submodule, compare with number N of the unknown number treating fitting function for the number of the object pixel size that described processing module is preserved and the data pair of motor position, depending on the value of described N is according to the selected precision treating fitting function and the first motor calculating position；

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

The most described computing module includes:

First calculating sub module, for the object pixel size preserved according to described processing module and motor position, is calculated, by default computation rule, the first motor calculating position that the first object Pixel Dimensions with described acquisition mates.

Mobile terminal the most according to claim 9, it is characterised in that described first calculating sub module includes:

Primary importance determines unit, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module with described preservation are compared, when the second object pixel in the first object Pixel Dimensions of described acquisition with all object pixel sizes of described preservation is equivalently-sized, the second motor position mated with described second object pixel size is calculated position as the first motor；

Described adjusting module includes:

First adjusts submodule, for described primary importance being determined calculated first motor of unit calculates position and moves a preset safe distance S towards nearly burnt direction, and focusing direction, unidirectional for described motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

11. mobile terminals according to claim 9, it is characterised in that described first calculating sub module includes:

The second position determines unit, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module with described preservation are compared, when the first object Pixel Dimensions of described acquisition is less than the minimum target Pixel Dimensions in the object pixel size of described preservation, the minimum motor position with described minimum target pixel matching is calculated position as the first motor；

Described adjusting module includes:

Second adjusts submodule, for the described second position being determined calculated first motor of unit calculates position and moves a preset safe distance S towards nearly burnt direction, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

12. mobile terminals according to claim 9, it is characterised in that described first calculating sub module includes:

3rd position determination unit, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the maximum target Pixel Dimensions in the object pixel size of described preservation, the maximum motor position with described maximum target pixel matching is calculated position as the first motor；

Described adjusting module includes:

3rd adjusts submodule, a preset safe distance S is moved towards remote burnt direction for calculated for described 3rd position determination unit the first motor being calculated position, and focusing direction, unidirectional for motor local is defined as nearly burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

13. mobile terminals according to claim 9, it is characterised in that described first calculating sub module includes:

4th position determination unit, all object pixel sizes for the first object Pixel Dimensions that obtained by described acquisition module with described preservation are compared, when the first object Pixel Dimensions of described acquisition is more than the 3rd object pixel size in the object pixel size of described preservation, and when being less than the 4th object pixel size in the object pixel size of described preservation, the 3rd motor position mated with described 3rd object pixel size is calculated position as the first motor；

Described adjusting module includes:

4th adjusts submodule, a preset safe distance S is moved towards nearly burnt direction for calculated for described 4th position determination unit the first motor being calculated position, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.

14. mobile terminals according to claim 8, it is characterised in that described fitting module includes:

3rd matching submodule, compare with number N of the unknown number treating fitting function for the number of the object pixel size that described processing module is preserved and the data pair of motor position, depending on the value of described N is according to the selected precision treating fitting function prototype and the first motor calculating position；

4th matching submodule, for when the number of data pair is more than or equal to N, meeting the formation condition of matching relationship function, then carry out least square fitting computing according to preset algorithm, obtain described in treat the value of each unknown number of fitting function；

5th matching submodule, the value of each unknown number treating fitting function for obtaining according to described 4th matching submodule, generate the matching relationship function of motor position and object pixel size；

Described adjusting module includes:

5th adjusts submodule, a preset safe distance S is moved towards nearly burnt direction for calculated for described computing module the first motor being calculated position, and focusing direction, unidirectional for motor local is defined as remote burnt direction, adjust motor position, completing this focusing, the value of described S is according to depending on photographic head module characteristic commissioning.