CN108184065A - Preview frame screen generating method, device and mobile terminal - Google Patents
Preview frame screen generating method, device and mobile terminal Download PDFInfo
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- CN108184065A CN108184065A CN201810008921.0A CN201810008921A CN108184065A CN 108184065 A CN108184065 A CN 108184065A CN 201810008921 A CN201810008921 A CN 201810008921A CN 108184065 A CN108184065 A CN 108184065A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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Abstract
The present embodiments relate to Internet technical fields, provide a kind of preview frame screen generating method, device and mobile terminal, and the mobile terminal includes photographic device, the method includes：Obtain the first preview frame picture of photographic device acquisition；Using the delay time prediction model pre-established, according to the current performance parameters of mobile terminal, the delay time of photographic device is predicted；Within delay time, the second preview frame picture of photographic device acquisition is obtained, to obtain discrete preview frame picture.The embodiment of the present invention is after the first preview frame picture is acquired, the delay time of current performance parameters dynamic prediction photographic device according to mobile terminal, so as to fulfill the second preview frame picture is acquired within delay time, the generation of discontinuous preview frame picture is realized, it is highly practical.
Description
Technical field
The present invention relates to Internet technical field, in particular to a kind of preview frame screen generating method, device and shifting
Dynamic terminal.
Background technology
Android is applied during calling camera gathered data and generating picture, can obtain Camera drives first
Then dynamic class drives class to open camera and proceeds by continuous preview (time interval 16.67ms) by Camera.Camera is pre-
It is substantially exactly the color channel values for capturing scene to look at, and generates the byte data of a yuv format, YUV is substantially gray-scale map
Picture, then camera applications YUV gray scale color datas are switched into RGB color data, RGB is switched to Bitmap by last camera applications
Figure, material is thus formed the frames in preview scene picture in camera applications.
It is above-mentioned be current camera apply carry out scene take pictures and generate video when mainstream way, i.e., every 16.67ms
A pictures (frame) are generated, at least 60 frames can be continuously generated in 1s.But the process flow exists just for similar camera
And video class application of taking pictures, it needs to continuously generate the scene of frame picture, and certain special screnes need not carry out successive frame picture
Generation, and continuously generate frame picture for CPU consumption or EMS memory occupation all can be higher.
Invention content
The embodiment of the present invention is designed to provide a kind of preview frame screen generating method, device and mobile terminal, to
Generate discontinuous preview frame picture.
To achieve these goals, technical solution used in the embodiment of the present invention is as follows：
In a first aspect, an embodiment of the present invention provides a kind of preview frame screen generating method, it is described applied to mobile terminal
Mobile terminal includes photographic device, the method includes：Obtain the first preview frame picture of the photographic device acquisition；Using pre-
The delay time prediction model first established according to the current performance parameters of the mobile terminal, predicts prolonging for the photographic device
The slow time；Within the delay time, the second preview frame picture of the photographic device acquisition is obtained, it is discrete pre- to obtain
Look at frame picture.
Second aspect, the embodiment of the present invention additionally provide a kind of preview frame screen generating device, applied to mobile terminal, institute
It states mobile terminal and includes photographic device, the preview frame screen generating device is pre- including the first picture acquisition module, delay time
Survey module and the second picture acquisition module.Wherein, the first picture acquisition module is used to obtain the first of the photographic device acquisition
Preview frame picture；Delay time prediction module is used for using the delay time prediction model pre-established, according to described mobile whole
The current performance parameters at end predict the delay time of the photographic device；Second picture acquisition module is used in the delay
In, the second preview frame picture that the photographic device acquires is obtained, to obtain discrete preview frame picture.
The third aspect, the embodiment of the present invention additionally provide a kind of mobile terminal, and the mobile terminal includes photographic device, institute
It states mobile terminal and further includes memory；Processor；And preview frame screen generating device, the preview frame screen generating device are deposited
The software function module for being stored in the memory and being performed including one or more by the processor.The preview frame picture
Generating means include the first picture acquisition module, delay time prediction module and the second picture acquisition module.Wherein, the first picture
Acquisition module is used to obtain the first preview frame picture of the photographic device acquisition；Delay time prediction module is used for using advance
The delay time prediction model of foundation according to the current performance parameters of the mobile terminal, predicts the delay of the photographic device
Time；Second picture acquisition module was used within the delay time, and the second preview frame for obtaining the photographic device acquisition is drawn
Face, to obtain discrete preview frame picture.
Compared with the prior art, a kind of preview frame screen generating method provided in an embodiment of the present invention, device and mobile terminal,
First, the first preview frame picture of the photographic device acquisition is obtained；Then, mould is predicted using the delay time pre-established
Type according to the current performance parameters of mobile terminal, predicts the delay time of photographic device；Finally, within delay time, acquisition is taken the photograph
As the second preview frame picture that device acquires, to obtain discrete preview frame picture.The embodiment of the present invention is pre- in acquisition first
It lookes at after frame picture, the delay time of the current performance parameters dynamic prediction photographic device according to mobile terminal, so as to fulfill prolonging
The second preview frame picture of acquisition, realizes the generation of discontinuous preview frame picture in the slow time, highly practical.
For the above objects, features and advantages of the present invention is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the block diagram of mobile terminal provided in an embodiment of the present invention.
Fig. 2 shows the preview frame screen generating method flow charts that first embodiment of the invention provides.
Fig. 3 be Fig. 2 shows step S102 sub-step flow chart.
Fig. 4 be Fig. 2 shows step S103 sub-step flow chart.
Fig. 5 shows the block diagram for the preview frame screen generating device that second embodiment of the invention provides.
Icon：100- mobile terminals；101- memories；102- storage controls；103- processors；104- Peripheral Interfaces；
105- photographic devices；200- preview frame screen generating devices；201- the first picture acquisition modules；202- model building modules；
203- delay time prediction modules；204- the second picture acquisition modules.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be configured to arrange and design with a variety of different herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Go out all other embodiments obtained under the premise of creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
Fig. 1 is please referred to, Fig. 1 shows the block diagram of mobile terminal 100 provided in an embodiment of the present invention.Mobile terminal
100 may be, but not limited to, smart mobile phone, tablet computer, pocket computer on knee, vehicle-mounted computer, personal digital assistant
(personal digital assistant, PDA), wearable mobile terminal etc..The mobile terminal 100 is equipped with Android
System, including preview frame screen generating device 200, memory 101, storage control 102, processor 103, Peripheral Interface
104 and photographic device 105.
The memory 101, storage control 102,105 each element of processor 103, Peripheral Interface 104 and photographic device
It is directly or indirectly electrically connected between each other, to realize the transmission of data or interaction.For example, these elements can lead between each other
It crosses one or more communication bus or signal wire is realized and is electrically connected.The preview frame screen generating device 200 includes at least one
It is a to be stored in the memory 101 or be solidificated in the mobile terminal 100 in the form of software or firmware (firmware)
Operating system (operating system, OS) in software function module.The processor 103 is used to perform memory
The executable module stored in 101, such as the software function module or computer that the preview frame screen generating device 200 includes
Program.
Wherein, memory 101 may be, but not limited to, random access memory (Random Access Memory,
RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only
Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only Memory, EPROM),
Electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only Memory, EEPROM) etc..
Wherein, for memory 101 for storing program, the processor 103 performs described program after execute instruction is received.
Processor 103 can be a kind of IC chip, have signal handling capacity.Above-mentioned processor 103 can be with
It is general processor, including central processing unit (Central Processing Unit, CPU), network processing unit (Network
Processor, NP), speech processor and video processor etc.；Can also be digital signal processor, application-specific integrated circuit,
Field programmable gate array either other programmable logic device, discrete gate or transistor logic, discrete hardware components.
It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be
Microprocessor or the processor 103 can also be any conventional processors etc..
The Peripheral Interface 104 is used to various input/output devices being coupled to processor 103 and memory 101.
In some embodiments, Peripheral Interface 104, processor 103 and storage control 102 can be realized in one single chip.At it
In his some examples, they can be realized by independent chip respectively.
Photographic device 105 is for acquiring the first preview frame picture and the second preview frame picture, in the present embodiment, camera shooting dress
It puts 105 and may be, but not limited to, Android camera.
First embodiment
Fig. 2 is please referred to, Fig. 2 shows the preview frame screen generating method flow charts that first embodiment of the invention provides.In advance
Frame screen generating method of looking at includes the following steps：
Step S101 obtains the first preview frame picture of photographic device acquisition.
In embodiments of the present invention, the first preview frame picture can be collected after user opens photographic device 105 for the first time
Preview frame picture or user photographic device 105 open during, in camera delay time (Camera
Responsing Delay, CRD) in open the collected any one frame preview frame picture of camera preview.
CRD is operation photographic device 105, for example, opening, closing, open preview, close preview, flash of light lamp switch etc.
The operating lag that hardware operation generates.CRD is a unstable parameter of photographic device 105, and CRD is smaller, and photographic device 105 is hard
Part performance is higher.At present, the value of the CRD of mobile terminal 100 is floated in 1ms~16ms sections, value be it is unfixed,
The CRD of different model mobile terminal 100 is there are bigger difference, even if the value of the same CRD in different time of mobile terminal 100
There is also floatings, and therefore, the embodiment of the present invention uses the real-time performance according to mobile terminal 100, to predict photographic device 105
CRD value ranges, and the preview of photographic device 105 is opened in CRD value ranges in time, it is drawn so as to generate discontinuous preview frame
Face.
In embodiments of the present invention, it after collecting the first preview frame picture, needs according to the currency of mobile terminal 100
Energy parameter, for example, cpu load value, EMS memory occupation amount etc., to estimate the delay time of photographic device 105, so as in the delay
It is interior to be again turned on 105 preview of photographic device, to acquire the second preview frame picture, therefore, preview provided in an embodiment of the present invention
Frame screen generating method can also include the following steps S102：
Step S102 according to the performance parameter matrix of mobile terminal, establishes delay time prediction model.
In embodiments of the present invention, the performance parameter of mobile terminal 100 is to influence the factor of CRD values, performance parameter packet
It includes, but is not limited to cpu load value, EMS memory occupation amount etc..Performance parameter matrix can be built according to the interval of performance parameter
Vertical matrix, for example, the matrix established according to the interval of cpu load value, EMS memory occupation amount etc..Inventor is by a large amount of
Research test is found, in the performance parameter of mobile terminal 100 for influencing CRD values, cpu load value be influence it is the most significant because
Element, therefore, can be according to the cpu load value of mobile terminal 100, to establish delay time prediction model.
In embodiments of the present invention, delay time prediction model is established using partial least-squares regressive analysis method, specifically
Modeling method can be：First, the mould of delay time prediction model is determined according to the performance parameter matrix of mobile terminal 100
Type dependent variable, and model independent variable is determined according to delay time matrix；Then, model independent variable and model dependent variable are distinguished
It is standardized, obtains corresponding standardization independent variable matrix and standardization dependent variable matrix；Finally, according to standardization certainly
Matrix of variables and standardization dependent variable matrix, calculate the regression coefficient of delay time prediction model, during so as to establish out delay
Between prediction model, specific delay time prediction model establishes process and please refers to sub-step S1021~S1023.
Fig. 3 is please referred to, step S102 can include following sub-step：
Sub-step S1021 determines the model independent variable of delay time prediction model and model dependent variable, wherein, model is certainly
Variable is delay time matrix, and model dependent variable is the performance parameter matrix of mobile terminal.
In embodiments of the present invention, the performance parameter matrix for determining mobile terminal 100 is model dependent variable, that is to say, that
Model independent variable is established according to the interval of cpu load value, as a kind of embodiment, the interval of cpu load value can
It is obtained with being carried out largely testing to mobile terminal 100 when photographic device 105 acquires preview frame picture by user, in the present embodiment
In, inventor tests by a large amount of research, and the interval for determining cpu load value is [0.10,0.99], following basis
The interval of the cpu load value, establishing model dependent variable is：YL=[0.10,0.11,0.12 ..., 0.98,0.99]1×90,
Model dependent variable YLFor the matrix of one 1 × 90.
In addition, determine that delay time matrix is model independent variable, that is to say, that model is established according to the value of delay time
Independent variable, as a kind of embodiment, the value of delay time can be by user when photographic device 105 acquires preview frame picture
It carries out a large amount of tests to obtain, in the present embodiment, determines that argument models are：X=[x1,x2,...,L,...,x90]90×16, from
Variate model X is the matrix of one 90 × 16, wherein, standard variance matrixes of the L for the principal component of the first preview frame picture, and l
=[1,2,3 ..., 16]1×16, x1,x2,...,x90Include 16 values, and this 16 values are to test to arrive within the 1s times
16 CRD intervals.
Sub-step S1022 is standardized model independent variable and model dependent variable respectively, obtains corresponding standard
Change independent variable matrix and standardization dependent variable matrix.
In embodiments of the present invention, after determining model independent variable X and model dependent variable Y, to model independent variable X and mould
Type dependent variable Y is standardized respectively, obtains corresponding standardization independent variable matrix E0With standardization dependent variable matrix F0,
Standardization can be carried out according to the following formula：
Wherein, i=1,2 ... L..., n, n=90；J=1,2 ... L..., k, k=16；xijRepresent model independent variable X
In j-th of variable xjI-th of sample value；Represent j-th of variable x in model independent variable XjMean value；sjRepresent model certainly
J-th of variable x in variable XjStandard deviation；yiRepresent i-th of sample value in model dependent variable Y；Represent model dependent variable
The mean value of Y；syRepresent the standard deviation of model dependent variable Y；Represent xijNumerical value after standardization；Represent yiNumber after standardization
Value.
Sub-step S1023 carries out regression analysis to standardization independent variable matrix and standardization dependent variable matrix, is postponed
The regression coefficient of time prediction model.
In embodiments of the present invention, model independent variable X and model dependent variable Y are standardized respectively, obtained pair
The standardization independent variable matrix E answered0With standardization dependent variable matrix F0Later, to according to standardization independent variable matrix E0And standardization
Dependent variable matrix F0Regression analysis is carried out, calculates the regression coefficient of delay time prediction model, the calculation formula of regression coefficient
ForSo far, delay time prediction model has just been established out.
It should be noted that introduced in step S102 the step of establishing delay time prediction model, can be in acquisition the
It is carried out before one video frame picture, that is to say, that the process for establishing delay time prediction model can be with preview frame generating method
Other steps be not continuous, the method introduced in step S102 can be advanced with and establish delay time prediction model
And stored, subsequently directly invoke.
Step S103, using the delay time prediction model pre-established, according to the current performance parameters of mobile terminal, in advance
Survey the delay time of photographic device.
In embodiments of the present invention, after getting 105 collected first video frame picture of photographic device, movement is obtained
The current performance parameters of terminal 100 choose the current CPU load value of mobile terminal 100 in the present embodiment, and according to mobile terminal
100 current CPU load value predicts the delay time of photographic device 105, that is, opens camera preview next time, obtains
The time interval of second preview frame picture.
In embodiments of the present invention, the Forecasting Methodology of the delay time of photographic device 105 can be：First, foundation is utilized
Good delay time prediction model carries out Principle component extraction to predetermined time delay, obtains the initial value of delay time, default to prolong
The slow time is set as Ro=[1,16], that is, CRD value model of the current operating system for the mobile terminal 100 of Android system
It encloses；Then, after the initial value for calculating delay time, the cpu load value of mobile terminal 100 is obtained in real time, that is, is obtained
The current CPU load value of mobile terminal 100, and the current performance parameters mobile terminal 100 according to mobile terminal 100 is current
Cpu load value carries out confidence analysis to the initial value of delay time, predicts the delay time of photographic device 105, specific pre-
Survey process please refers to sub-step S1031~S1032.
Fig. 4 is please referred to, step S103 can include following sub-step：
Sub-step S1031 using delay time prediction model, carries out Principle component extraction to predetermined time delay, is prolonged
The initial value of slow time.
In embodiments of the present invention, predetermined time delay is set as the mobile terminal that current operating system is Android system
100 CRD value ranges, i.e. Ro=[1,16].As a kind of embodiment, during using Cross gain modulation algorithm to pre-set delay
Between carry out Principle component extraction, obtain the initial value of delay time, Principle component extraction formula is ROrigin=pRi,i∈[1,16]。
Sub-step S1032 according to the current performance parameters of mobile terminal, carries out confidence analysis to initial value, predicts and take the photograph
As the delay time of device.
In embodiments of the present invention, after the initial value for calculating delay time, the current of mobile terminal 100 is obtained in real time
Performance parameter, that is, the current CPU load value of mobile terminal 100, and according to the current performance parameters of mobile terminal 100, it is right
The initial value of delay time carries out confidence analysis, and specific method can be：First, confidence regression vectors are chosen
Wherein, 0.0975 is Partial Least Squares Regression standard confidence factor；Then, confidence matrix M is established according to confidence regression vectorsb,
Establishing formula is：Wherein, LCPUCurrent CPU load value for mobile terminal 100；Finally, it obtains
Take the current CPU load value L of mobile terminal 100CPU, and by LCPUInput confidence matrix Mb, confidence interval is calculated, that is, take the photograph
As the delay time of device 105, calculation formula is：M=Rorigin×Mb, wherein, M is the delay time of photographic device 105.
Step S104 within delay time, obtains the second preview frame picture of photographic device acquisition, discrete to obtain
Preview frame picture.
In embodiments of the present invention, the second preview frame picture is a later frame picture of the first preview frame picture.It calculates and takes the photograph
As device 105 delay time after, open image sensor within the delay time, photographic device 105 can be by the scape of acquisition
Image data is exported with the form of byte arrays, and then byte arrays are switched to the gray level image of yuv format, finally switch to YUV
RGB image with color channel generates the second preview frame picture, so as to obtain discrete preview frame picture.
In embodiments of the present invention, according to the performance parameter matrix of mobile terminal 100 and delay time matrix, using partially most
Small two one-tenth methods algorithm with regress analysis method establishes out delay time prediction model；Again by the current CPU of the mobile terminal 100 obtained in real time
Load value, input delay time prediction model, to calculate the time interval for opening image sensor next time, and in the time
Image sensor is opened in section, obtains discrete preview frame picture.The embodiment of the present invention is based on Partial Least Squares Regression point
Analysis algorithm carrys out the delay time of dynamic estimation photographic device 105, so as to fulfill image preview is opened in time within delay time, into
And realize the generation of the discontinuous preview frame picture of photographic device 105, and it is low for CPU consumption or EMS memory occupation, have good
Practicability.
Second embodiment
Fig. 5 is please referred to, Fig. 5 shows the box for the preview frame screen generating device 200 that second embodiment of the invention provides
Schematic diagram.Preview frame screen generating device 200 includes the first picture acquisition module 201, model building module 202, delay time
203 and second picture acquisition module 204 of prediction module.
First picture acquisition module 201, for obtaining the first preview frame picture of photographic device acquisition.
In embodiments of the present invention, the first picture acquisition module 201 can be used for performing step S101.
Model building module 202 for the performance parameter matrix according to mobile terminal, establishes delay time prediction model.
In embodiments of the present invention, model building module 202 can be used for performing step S102.
In embodiments of the present invention, model building module 202 can be also used for performing the sub-step S1021 of step S102~
S1023。
Delay time prediction module 203, for utilizing the delay time prediction model pre-established, according to mobile terminal
Current performance parameters predict the delay time of photographic device.
In embodiments of the present invention, delay time prediction module 203 can be used for performing step S103.
In embodiments of the present invention, delay time prediction module 203 can be also used for performing the sub-step of step S103
S1031~S1032.
Second picture acquisition module 204, the second preview frame within delay time, obtaining photographic device acquisition are drawn
Face, to obtain discrete preview frame picture.
In embodiments of the present invention, the second picture acquisition module 204 can be used for performing step S104.
In conclusion a kind of preview frame screen generating method provided in an embodiment of the present invention, device and mobile terminal, described
Mobile terminal includes photographic device, the method includes：Obtain the first preview frame picture of photographic device acquisition；Using building in advance
Vertical delay time prediction model according to the current performance parameters of mobile terminal, predicts the delay time of photographic device；Postponing
In time, the second preview frame picture of photographic device acquisition is obtained, to obtain discrete preview frame picture.The embodiment of the present invention
After the first preview frame picture is acquired, the delay time of the current performance parameters dynamic prediction photographic device according to mobile terminal,
So as to fulfill the second preview frame picture is acquired within delay time, the generation of discontinuous preview frame picture is realized, it is highly practical.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flow chart or block diagram can represent the one of a module, program segment or code
Part, a part for the module, program segment or code include one or more and are used to implement holding for defined logic function
Row instruction.It should also be noted that at some as in the realization method replaced, the function that is marked in box can also be to be different from
The sequence marked in attached drawing occurs.For example, two continuous boxes can essentially perform substantially in parallel, they are sometimes
It can perform in the opposite order, this is depended on the functions involved.It is it is also noted that every in block diagram and/or flow chart
The combination of a box and the box in block diagram and/or flow chart can use function or the dedicated base of action as defined in performing
It realizes or can be realized with the combination of specialized hardware and computer instruction in the system of hardware.
In addition, each function module in each embodiment of the present invention can integrate to form an independent portion
Point or modules individualism, can also two or more modules be integrated to form an independent part.
If the function is realized in the form of software function module and is independent product sale or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention is substantially in other words
The part contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, is used including some instructions so that a computer equipment (can be
People's computer, server or network equipment etc.) perform all or part of the steps of the method according to each embodiment of the present invention.
And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.It needs
Illustrate, herein, relational terms such as first and second and the like be used merely to by an entity or operation with
Another entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this realities
The relationship or sequence on border.Moreover, term " comprising ", "comprising" or its any other variant are intended to the packet of nonexcludability
Contain so that process, method, article or equipment including a series of elements not only include those elements, but also including
It other elements that are not explicitly listed or further includes as elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, also there are other identical elements in article or equipment.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should be noted that：Similar label and letter exists
Similar terms are represented in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and is explained.
Claims (10)
1. a kind of preview frame screen generating method, which is characterized in that applied to mobile terminal, the mobile terminal includes camera shooting and fills
It puts, the method includes：
Obtain the first preview frame picture of the photographic device acquisition；
Using the delay time prediction model pre-established, according to the current performance parameters of the mobile terminal, taken the photograph described in prediction
As the delay time of device；
Within the delay time, the second preview frame picture of the photographic device acquisition is obtained, to obtain discrete preview
Frame picture.
2. the method as described in claim 1, which is characterized in that the method further includes：
According to the performance parameter matrix of the mobile terminal, the delay time prediction model is established.
3. method as claimed in claim 2, which is characterized in that described the step of establishing the delay time prediction model, packet
It includes：
Determine the model independent variable of the delay time prediction model and model dependent variable, wherein, the model independent variable is prolongs
Slow time matrix, the model dependent variable are the performance parameter matrix of the mobile terminal；
The model independent variable and the model dependent variable are standardized respectively, obtain corresponding standardization independent variable
Matrix and standardization dependent variable matrix；
Regression analysis is carried out to the standardization independent variable matrix and the standardization dependent variable matrix, obtains the delay time
The regression coefficient of prediction model.
4. the method as described in claim 1, which is characterized in that it is described to utilize the delay time prediction model pre-established, according to
According to the current performance parameters of the mobile terminal, the step of predicting the delay time of the photographic device, including：
Using the delay time prediction model, Principle component extraction is carried out to predetermined time delay, obtains the delay time
Initial value；
According to the current performance parameters of the mobile terminal, confidence analysis is carried out to the initial value, predicts the camera shooting dress
The delay time put.
5. method as claimed in claim 4, which is characterized in that the current performance parameters according to the mobile terminal, it is right
The initial value carries out confidence analysis, the step of predicting the delay time of the photographic device, including：
Obtain the recurrence confidence factor of the delay time prediction model；
According to the recurrence confidence factor, the confidence matrix of the current performance parameters of the mobile terminal is established, and put described
Believe delay time of the matrix as the photographic device.
6. a kind of preview frame screen generating device, which is characterized in that applied to mobile terminal, the mobile terminal includes camera shooting and fills
It puts, the preview frame screen generating device includes：
First picture acquisition module, for obtaining the first preview frame picture of the photographic device acquisition；
Delay time prediction module, for utilizing the delay time prediction model pre-established, according to working as the mobile terminal
Preceding performance parameter predicts the delay time of the photographic device；
Second picture acquisition module, the second preview frame within the delay time, obtaining the photographic device acquisition are drawn
Face, to obtain discrete preview frame picture.
7. device as claimed in claim 6, which is characterized in that the preview frame screen generating device further includes：
Model building module for the performance parameter matrix according to the mobile terminal, establishes the delay time prediction model.
8. device as claimed in claim 7, which is characterized in that the model building module is specifically used for：
Determine the model independent variable of the delay time prediction model and model dependent variable, wherein, the model independent variable is prolongs
Slow time matrix, the model dependent variable are the performance parameter matrix of the mobile terminal；
The model independent variable and the model dependent variable are standardized, obtain standardization independent variable matrix and standard
Change dependent variable matrix；
Regression analysis is carried out to the standardization independent variable matrix and the standardization dependent variable matrix, obtains the delay time
The regression coefficient of prediction model.
9. device as claimed in claim 6, which is characterized in that the delay time prediction module is specifically used for：
Using the delay time prediction model, Principle component extraction is carried out to predetermined time delay, obtains the delay time
Initial value；
According to the current performance parameters of the mobile terminal, confidence analysis is carried out to the initial value, predicts the camera shooting dress
The delay time put.
10. a kind of mobile terminal, which is characterized in that the mobile terminal includes photographic device, and the mobile terminal further includes：
Memory；
Processor；And
Preview frame screen generating device, the preview frame screen generating device are stored in the memory and including one or more
A software function module performed by the processor, including：
First preview frame picture acquisition module, for obtaining the first preview frame picture of the photographic device acquisition；
Delay time prediction module, for utilizing the delay time prediction model pre-established, according to working as the mobile terminal
Preceding performance parameter predicts the delay time of the photographic device；
Second preview frame picture acquisition module, it is pre- within the delay time, obtaining the second of the photographic device acquisition
Frame picture is look at, to obtain discrete preview frame picture.
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| PCT/CN2018/081230 WO2019134271A1 (en) | 2018-01-04 | 2018-03-30 | Preview frame generation method and apparatus, mobile terminal, and storage medium |
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| WO2019134271A1 (en) | 2019-07-11 |
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