CN108055470A - A kind of method of focusing, terminal and storage medium - Google Patents
A kind of method of focusing, terminal and storage medium Download PDFInfo
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- CN108055470A CN108055470A CN201810059076.XA CN201810059076A CN108055470A CN 108055470 A CN108055470 A CN 108055470A CN 201810059076 A CN201810059076 A CN 201810059076A CN 108055470 A CN108055470 A CN 108055470A
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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
- H04N23/67—Focus control based on electronic image sensor signals
Abstract
The embodiment of the invention discloses a kind of method of focusing, terminal and storage medium, wherein, this method includes：Focusing window is divided into N number of focusing child window in advance；In focus process, the Focusing parameter of all focusing child windows in each two field picture in continuous N two field picture is obtained；Focusing parameter includes：First parameter and the second parameter；Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window；Using the second parameter of child window of normally focusing in each two field picture in M two field pictures calculate each two field picture to coke number FV values, obtain M FV value；Normal focusing child window is the focusing child window in each two field picture in addition to all interference child windows；The M FV value according to obtaining is focused.It so, it is possible to reduce influence of mobile or variation the object to focusing, improve focusing accuracy.
Description
Technical field
The present invention relates to a kind of computer technology more particularly to method of focusing, terminal and storage mediums.
Background technology
With the development of mobile terminal technology, taken pictures more and more frequently using mobile terminal, user claps for mobile terminal
The requirement for taking the photograph effect is also higher and higher.Using camera object is shot when, camera it needs to be determined that can clearly into
The focal length of picture, then object is shot with definite focal length, so that the image imaging clearly of shooting.
In existing focusing method when carrying out focus operation to target object, lens location and image to coke number
(Focus Value, FV) corresponds to a kind of relation curve, and maximum FV values are determined in relation curve, and it is right to choose maximum FV values institute
The lens location answered, which carries out shooting, can obtain most clearly image.But if occurring movement in photographed scene in focus process
When object or the object of variation, the accuracy of FV values calculating can be influenced, so as to influence the selection of maximum FV values, reduces focusing
Accuracy.Therefore, the accuracy for focusing being improved for such scene becomes urgent problem to be solved.
The content of the invention
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method of focusing, terminal and storage medium, it can
Influence of the mobile object to focusing is reduced, improves focusing accuracy.
In order to achieve the above objectives, the technical solution of the embodiment of the present invention is realized in：An embodiment of the present invention provides
A kind of method of focusing, including：
Focusing window is divided into N number of focusing child window in advance；N takes the integer more than 1；
In focus process, the Focusing parameter of all focusing child windows in each two field picture in continuous N two field picture is obtained；
The Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1；
Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window；
Each frame figure is calculated using the second parameter of child window of normally focusing in each two field picture in the M two field pictures
The FV values of picture obtain M FV value；The normal focusing child window in each two field picture in addition to all interference child windows
Focusing child window；
The M FV value according to obtaining is focused.
In said program, first parameter is brightness value or color value；Correspondingly, the disturbed condition includes：The M
The first Parameters variation amount of the focusing child window of same position is more than change threshold in arbitrary neighborhood two field pictures in two field picture.
In said program, second parameter is contrast；Correspondingly, each frame using in the M two field pictures
The Focusing parameter of child window of normally focusing in image calculates the FV values of each two field picture, including：Using in the M two field pictures
The contrast of child window of normally focusing in each two field picture calculates the FV values of each two field picture.
In said program, the comparison for child window of normally focusing in each two field picture using in the M two field pictures
Degree calculates the FV values of each two field picture, including：FV values in each two field picture are calculated according to the following formula：
Wherein, n is normal focusing child window quantity, CiFor the contrast of i-th of normal focusing child window.
In said program, M FV value that the basis obtains, which carries out focusing, to be included：It is fitted using M obtained FV value
FV curves search for the position that maximum FV values are corresponding in the FV curves to complete to focus.
A kind of terminal is additionally provided in the embodiment of the present invention, the terminal includes：Processor and memory；Wherein,
The processor is used to perform the focusing program stored in memory, to realize following steps：
Focusing window is divided into N number of focusing child window in advance；N takes the integer more than 1；
In focus process, the Focusing parameter of all focusing child windows in each two field picture in continuous N two field picture is obtained；
The Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1；
Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window；
Each frame figure is calculated using the second parameter of child window of normally focusing in each two field picture in the M two field pictures
The FV values of picture obtain M FV value；The normal focusing child window in each two field picture in addition to all interference child windows
Focusing child window；
The M FV value according to obtaining is focused.
In said program, first parameter is brightness value or color value；Correspondingly, the disturbed condition includes：The M
The first Parameters variation amount of the focusing child window of same position is more than change threshold in arbitrary neighborhood two field pictures in two field picture.
In said program, second parameter is contrast；The processor is specifically used for performing what is stored in memory
Focusing program, to realize following steps：Utilize the comparison for child window of normally focusing in each two field picture in the M two field pictures
Degree calculates the FV values of each two field picture.
In said program, the processor is specifically used for performing the focusing program stored in memory, to realize following step
Suddenly：FV values in each two field picture are calculated according to the following formula：
Wherein, n is normal focusing child window quantity, CiFor the contrast of i-th of normal focusing child window.
The embodiment of the present invention additionally provides a kind of computer readable storage medium, when which is executed by processor
The step of realizing method described in any one of the above embodiments.
Method, terminal and the storage medium of a kind of focusing provided in an embodiment of the present invention, are divided into N by focusing window in advance
A focusing child window；N takes the integer more than 1；In focus process, obtain in each two field picture in continuous N two field picture and own
The Focusing parameter of focusing child window；Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1；According to acquisition
The first parameter determine to meet the focusing child window of disturbed condition as interference child window；Utilize each two field picture in M two field pictures
In normally focus the second parameter of child window calculate the FV values of each two field picture, obtain M FV value；Normal focusing child window
For the focusing child window in each two field picture in addition to all interference child windows；The M FV value according to obtaining is focused.
Using above-mentioned technical proposal, existing focusing area is first divided into multiple focusing subregions, it is right to obtain each
The Focusing parameter of burnt subregion identifies the focusing sub-district of Focusing parameter generation large change in image further according to Focusing parameter
These regions are defined as interference region by domain, and each frame is calculated using the normal focusing subregion for removing all interference regions
The FV values of image, the FV values so as to ensure are carried out again from influences such as object movement or variations using M obtained FV value
Focusing, is determined the focusing position of camera lens, is finally shot using definite focusing position, obtain clearly image.In this way, energy
Enough influences for reducing mobile or variation object to focusing, improve focusing accuracy.
Description of the drawings
The hardware architecture diagram of Fig. 1 each optional mobile terminals of embodiment one to realize the present invention；
Fig. 2 is the wireless communication system schematic diagram of mobile terminal as shown in Figure 1；
Fig. 3 is the flow chart of the first embodiment for the method focused in the embodiment of the present invention；
Fig. 4 is the first division schematic diagram of focusing window in the embodiment of the present invention；
Fig. 5 is the flow chart of the second embodiment for the method focused in the embodiment of the present invention；
Fig. 6 is the second division schematic diagram of focusing window in the embodiment of the present invention；
Fig. 7 is the flow chart of the 3rd embodiment for the method focused in the embodiment of the present invention；
Fig. 8 is the schematic diagram of FV curves in the embodiment of the present invention；
Fig. 9 is the composition structure diagram of terminal in the embodiment of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In subsequent description, using for representing that the suffix of such as " module ", " component " or " unit " of element is only
Be conducive to the explanation of the present invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
Terminal can be implemented in a variety of manners.For example, terminal described in the present invention can include such as mobile phone, tablet
Computer, laptop, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable
The shiftings such as media player (Portable Media Player, PMP), guider, wearable device, Intelligent bracelet, pedometer
The dynamic fixed terminals such as terminal and number TV, desktop computer.
It will be illustrated in subsequent descriptions by taking mobile terminal as an example, it will be appreciated by those skilled in the art that except special
For moving outside the element of purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Referring to Fig. 1, a kind of hardware architecture diagram of its mobile terminal of each embodiment to realize the present invention, the shifting
Dynamic terminal 100 can include：RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit
103rd, A/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit
108th, the components such as memory 109, processor 110 and power supply 111.It will be understood by those skilled in the art that shown in Fig. 1
Mobile terminal structure does not form the restriction to mobile terminal, and mobile terminal can be included than illustrating more or fewer components,
Either combine some components or different components arrangement.
The all parts of mobile terminal are specifically introduced with reference to Fig. 1：
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, signal sends and receivees, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, by the data sending of uplink to base station.In general, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, it penetrates
Frequency unit 101 can also be communicated by wireless communication with network and other equipment.Above-mentioned wireless communication can use any communication
Standard or agreement include but not limited to GSM (Global System of Mobile communication, global system for mobile telecommunications
System), GPRS (General Packet Radio Service, general packet radio service), CDMA2000 (Code
Division Multiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, wideband code division multiple access), TD-SCDMA (Time Division-Synchronous Code
Division Multiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, frequency division duplex Long Term Evolution) and TDD-LTE (Time Division
Duplexing-Long Term Evolution, time division duplex Long Term Evolution) etc..
WiFi belongs to short range wireless transmission technology, and mobile terminal can help user to receive and dispatch electricity by WiFi module 102
Sub- mail, browsing webpage and access streaming video etc., it has provided wireless broadband internet to the user and has accessed.Although Fig. 1 shows
Go out WiFi module 102, but it is understood that, and must be configured into for mobile terminal is not belonging to, it completely can be according to need
It to be omitted in the scope of essence for not changing invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
Formula, speech recognition mode, broadcast reception mode when under isotypes, by radio frequency unit 101 or WiFi module 102 it is receiving or
The voice data stored in memory 109 is converted into audio signal and exports as sound.Moreover, audio output unit 103
The relevant audio output of specific function performed with mobile terminal 100 can also be provided (for example, call signal receives sound, disappears
Breath receives sound etc.).Audio output unit 103 can include loud speaker, buzzer etc..
A/V input units 104 are used to receive audio or video signal.A/V input units 104 can include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the static images or the image data of video obtained in image capture mode by image capture apparatus (such as camera) carry out
Reason.Treated, and picture frame may be displayed on display unit 106.Through graphics processor 1041, treated that picture frame can be deposited
Storage is sent in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (voice data), and can be voice data by such acoustic processing.Audio that treated (voice) data can
To be converted to the form output that mobile communication base station can be sent to via radio frequency unit 101 in the case of telephone calling model.
Microphone 1042 can implement various types of noises elimination (or inhibition) algorithms and send and receive sound to eliminate (or inhibition)
The noise generated during frequency signal or interference.
Mobile terminal 100 further includes at least one sensor 105, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity sensor, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity sensor can close when mobile terminal 100 is moved in one's ear
Display panel 1061 and/or backlight.As one kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axis) size of acceleration, size and the direction of gravity are can detect that when static, the application available for identification mobile phone posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The fingerprint sensor that can also configure as mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer,
The other sensors such as hygrometer, thermometer, infrared ray sensor, details are not described herein.
Display unit 106 is used to show by information input by user or be supplied to the information of user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode may be employed
Forms such as (Organic Light-Emitting Diode, OLED) configure display panel 1061.
User input unit 107 can be used for the number for receiving input or character information and generation and the use of mobile terminal
The key signals input that family is set and function control is related.Specifically, user input unit 107 may include touch panel 1071 with
And other input equipments 1072.Touch panel 1071, also referred to as touch-screen, collect user on it or neighbouring touch operation
(for example user uses any suitable objects such as finger, stylus or attachment on touch panel 1071 or in touch panel 1071
Neighbouring operation), and corresponding attachment device is driven according to preset formula.Touch panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
Contact coordinate is converted into, then gives processor 110, and the order that processor 110 is sent can be received and performed.It in addition, can
To realize touch panel 1071 using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except touch panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
It includes but is not limited to physical keyboard, in function key (such as volume control button, switch key etc.), trace ball, mouse, operation lever etc.
One or more, do not limit herein specifically.
Further, touch panel 1071 can cover display panel 1061, when touch panel 1071 detect on it or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, touch panel 1071 and display panel
1061 be the component independent as two to realize the function that outputs and inputs of mobile terminal, but in certain embodiments, it can
The function that outputs and inputs of mobile terminal is realized so that touch panel 1071 and display panel 1061 is integrated, is not done herein specifically
It limits.
Interface unit 108 be used as at least one external device (ED) be connected with mobile terminal 100 can by interface.For example,
External device (ED) can include wired or wireless head-band earphone port, external power supply (or battery charger) port, wired or nothing
Line data port, memory card port, the port for device of the connection with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in mobile terminal 100 or can be with
For transmitting data between mobile terminal 100 and external device (ED).
Memory 109 can be used for storage software program and various data.Memory 109 can mainly include storing program area
And storage data field, wherein, storing program area can storage program area, application program (such as the sound needed at least one function
Sound playing function, image player function etc.) etc.；Storage data field can store according to mobile phone use created data (such as
Voice data, phone directory etc.) etc..In addition, memory 109 can include high-speed random access memory, can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the entire mobile terminal of connection
A part is stored in storage by running or performing the software program being stored in memory 109 and/or module and call
Data in device 109 perform the various functions of mobile terminal and processing data, so as to carry out integral monitoring to mobile terminal.Place
Reason device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Device is managed, wherein, the main processing operation system of application processor, user interface and application program etc., modem processor is main
Handle wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also be included to the power supply 111 (such as battery) of all parts power supply, it is preferred that power supply 111
Can be logically contiguous by power-supply management system and processor 110, so as to realize management charging by power-supply management system, put
The functions such as electricity and power managed.
Although Fig. 1 is not shown, mobile terminal 100 can also be including bluetooth module etc., and details are not described herein.
For the ease of understanding the embodiment of the present invention, below to the communications network system that is based on of mobile terminal of the present invention into
Row description.
Referring to Fig. 2, Fig. 2 is a kind of communications network system Organization Chart provided in an embodiment of the present invention, the communication network system
It unites as the LTE system of universal mobile communications technology, UE (User Equipment, use of the LTE system including communicating connection successively
Family equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, evolved UMTS lands
Ground wireless access network) 202, EPC (Evolved Packet Core, evolved packet-based core networks) 203 and operator IP operation
204。
Specifically, UE201 can be above-mentioned terminal 100, and details are not described herein again.
E-UTRAN202 includes eNodeB2021 and other eNodeB2022 etc..Wherein, eNodeB2021 can be by returning
Journey (backhaul) (such as X2 interface) is connected with other eNodeB2022, and eNodeB2021 is connected to EPC203,
ENodeB2021 can provide the access of UE201 to EPC203.
EPC203 can include MME (Mobility Management Entity, mobility management entity) 2031, HSS
(Home Subscriber Server, home subscriber server) 2032, other MME2033, SGW (Serving Gate Way,
Gateway) 2034, PGW (PDN Gate Way, grouped data network gateway) 2035 and PCRF (Policy and
Charging Rules Function, policy and rate functional entity) 2036 etc..Wherein, MME2031 be processing UE201 and
The control node of signaling, provides carrying and connection management between EPC203.HSS2032 is all to manage for providing some registers
Such as the function of attaching position register (not shown) etc, and some are preserved in relation to use such as service features, data rates
The dedicated information in family.All customer data can be sent by SGW2034, and PGW2035 can provide the IP of UE 201
Address is distributed and other functions, and PCRF2036 is business data flow and the strategy of IP bearing resources and charging control strategic decision-making
Point, it selects and provides available strategy and charging control decision-making with charge execution function unit (not shown) for strategy.
IP operation 204 can include internet, Intranet, IMS (IP Multimedia Subsystem, IP multimedia
System) or other IP operations etc..
Although above-mentioned be described by taking LTE system as an example, those skilled in the art it is to be understood that the present invention not only
Suitable for LTE system, be readily applicable to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA with
And following new network system etc., it does not limit herein.
Based on above-mentioned mobile terminal hardware configuration and communications network system, each embodiment of the method for the present invention is proposed.
First embodiment
First embodiment of the invention proposes a kind of method of focusing, can be applied to have in the terminal of shooting function.
Here, the terminal of above-mentioned record can be the fixed terminal with display screen or the shifting with display screen
Dynamic terminal.
The fixed terminal of above-mentioned record can be computer etc., and the mobile terminal of above-mentioned record includes but not limited to mobile electricity
Words, laptop, camera, PDA, PAD, PMP, guider etc..Terminal can be connected to internet, wherein, connection
Mode can be by operator provide mobile internet be attached, can also be by access wireless access point come into
Row network connection.
Here, if mobile terminal has operating system, which can be UNIX, Linux, Windows, Android
(Android), Windows Phone etc..
It should be noted that species, shape, size to the display screen in terminal etc. is not limited, illustratively, eventually
Display screen on end can be liquid crystal display etc..
In the first embodiment of the invention, the display screen of above-mentioned record is used to provide a user the interface of human-computer interaction.
Fig. 3 is the flow chart of the first embodiment for the method focused in the embodiment of the present invention, as shown in figure 3, this method bag
It includes：
Step 301：Focusing window is divided into N number of focusing child window in advance, N takes the integer more than 1.
In actual implementation, FV values are typically to be drawn after handling the image of imaging device output for phenogram
The data of image sharpness, FV values are bigger, and image is more clear.Focus operation is being carried out to target object in existing focusing method
When, lens location has a kind of corresponding relation curve with the FV values of image, which is presented unimodality, by searching for curve
Peak (near or), determine lens location complete focus operation.Due to one FV value of correspondence of a two field picture, in focusing field
When occurring mobile object or interfering object in scape, the FV values that can make are affected, so as to influence the FV curves being finally fitted.
In the embodiment of the present invention, in order to improve the accuracy of FV values calculating, focusing window is divided into N number of sub- window of focusing
Mouthful, the focusing child window disturbed by screening the presence in focusing window disturbs to reduce.Assuming that focusing window is 400 × 400
Pixel region, focusing window can be divided into the focusing child windows of 16 100 × 100 pixel regions.
Here, it is exemplary only give a kind of dividing mode of focusing window, focusing window in practical applications
Dividing mode can carry out sets itself according to practical application request, and the embodiment of the present invention is not specifically limited.
Step 302：In focus process, all focusing child windows in each two field picture in continuous N two field picture are obtained
Focusing parameter；Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1.
In the present invention is implemented, the first parameter can be the common image parameters such as brightness value or color value, the second parameter
Or the image parameter that contrast etc. is common.
In focus process, motor driving camera lens is moved at short focus at long-focus, and each certain moving step length obtains
A two field picture is taken, by the clarity of the Focusing parameter detection image of acquisition, and determines the mirror of the highest two field picture of clarity
Head position is focusing position, and current scene is shot in focusing position, can obtain most clearly image.
Step 303：Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window.
In the embodiment of the present invention, whether the first parameter is interference child window for the child window that judges to focus.Illustratively,
One parameter is brightness value or color value；Correspondingly, disturbed condition includes：Identical bits in arbitrary neighborhood two field pictures in M two field pictures
First Parameters variation amount of the focusing child window put is more than change threshold.
Illustratively, when mobile terminal is used to be focused, the brightness value of each focusing subregion, brightness value are obtained
Be according to comprising multiple pixels parameter come definite.For example, compare each in the i-th two field picture and i+1 two field picture
During the brightness value of focusing child window, the variation of focusing 1 brightness value of child window of the i-th two field picture and i+1 two field picture is judged respectively
Whether amount is greater than change threshold, and whether the variable quantity for child window 2 of focusing is more than variable quantity threshold value, and so on until having judged
Each focusing child window in two field pictures；It then continues to judge between i+1 two field picture and the i-th+2 two field picture with the presence or absence of bright
The focusing child window of angle value mutation；Finally after each focusing child window in having judged each two field picture, determine all
Disturb child window and child window of normally focusing.Here, i takes the integer less than M-2.
Step 304：It is calculated using the second parameter of child window of normally focusing in each two field picture in M two field pictures each
The FV values of two field picture obtain M FV value.
Here, normally focusing child window is the focusing child window in each two field picture in addition to all interference child windows.
In the embodiment of the present invention, the second parameter is used to calculate the FV values of each two field picture.Illustratively, the second parameter is pair
Degree of ratio；Correspondingly, calculate each frame figure using the Focusing parameter for child window of normally focusing in each two field picture in M two field pictures
The FV values of picture, including：Each frame figure is calculated using the contrast for child window of normally focusing in each two field picture in M two field pictures
The FV values of picture.
Fig. 4 is the first division schematic diagram of focusing window in the embodiment of the present invention, it is assumed that focusing window 40
For 400 × 400 pixel region, focusing window 40 is divided into the focusing child window of 16 100 × 100, including sub- window of focusing
Mouthful 1 to focusing child window 16, wherein, the focusing child window 11 and focusing child window 12 that dash area includes are interference child window,
Remaining 14 are normal focusing child window, and the FV values of a two field picture are calculated using the second parameter of all focusing child windows.
Step 305：The M FV value according to obtaining is focused.
Illustratively, carrying out focusing according to M obtained FV value includes：FV curves are fitted using M obtained FV value,
The position that maximum FV values are corresponding in FV curves is searched for complete to focus.A two field picture represents camera lens one in the embodiment of the present invention
The image of a position shooting, therefore a two field picture can also represent a lens location.
In actual implementation, step 301 to step 305 either step can be completed by the processor of terminal.
In order to more embody the purpose of the present invention, on the basis of first embodiment of the invention, said program is carried out
It is further to illustrate.
Second embodiment
Fig. 5 is the flow chart of the second embodiment for the method focused in the embodiment of the present invention, as shown in figure 5, the flow bag
It includes：
Step 501：Focusing window is divided into N number of focusing child window in advance.
Step 502：In focus process, the brightness and contrast of each two field picture in continuous N two field picture is obtained.
Step 503：Judge whether the color change of the focusing child window of same position in arbitrary neighborhood two field pictures is more than
Change threshold, if so, performing step 504；If not, perform step 505.
It should be noted that when there is mobile or variation object in focusing window, it is some region of in focusing window
Focusing parameter can generate mutation, and can Sudden Changing Rate also be carried out to statistics in existing focusing technology and calculate FV values.The present invention is implemented
The Focusing parameter of mutation is determined whether there is according to the color change of image in example, specifically, connecting when photographed scene is stablized
The excursion of continuous its color value of multiple image does not exceed change threshold centainly, if it exceeds then showing captured object
It has greatly changed, and the calculating of FV values can be interfered with.Therefore, by judging the focusing child window in adjacent two field pictures
Focusing parameter whether meet disturbed condition, focus process is had an impact to determine whether there is mobile or variation object.
Further, it is determined that meeting the focusing child window of disturbed condition for interference child window, it is normal that other, which are unsatisfactory for disturbed condition,
Focusing child window.
Illustratively, when mobile terminal is used to be focused, the color value of each focusing subregion, color value are obtained
Be according to comprising multiple pixels parameter come definite.For example, compare each in the i-th two field picture and i+1 two field picture
During the color value of focusing child window, the variation of focusing 1 color value of child window of the i-th two field picture and i+1 two field picture is judged respectively
Whether amount is greater than change threshold, and whether the variable quantity for child window 2 of focusing is more than variable quantity threshold value, and so on until having judged
Each focusing child window in two field pictures；It then continues to judge to whether there is face between i+1 two field picture and the i-th+2 two field picture
The focusing child window of color value mutation；Finally after each focusing child window in having judged each two field picture, determine all
Disturb child window and child window of normally focusing.
Optionally, the color value of each focusing subregion can also be obtained, is determined whether according to the variation of color value
Disturb child window.Color value can utilize red (Red, R) green (Green, G) blue (Blue, B) three primary colours to represent.Color value
Be according to comprising multiple pixels parameter come definite.When the focusing child window in adjacent two field pictures at same position
It when color value is undergone mutation, determines that the shooting object at the position is moved or changed, determines the focusing area for interference
Subregion.
Step 504：Determine focusing child window for interference child window.
Step 505：Determine focusing child window for normal focusing child window.
Here, step 506 is performed both by after step 504 or step 505.
Step 506：After having judged all focusing child windows, all interference child windows and institute in N number of focusing child window are determined
There is normal focusing child window.
Illustratively, it is assumed that obtain continuous 20 two field picture, determine that the 1st two field picture is focused child window into the 10th two field picture
1 is interference child window, determines that the 11st two field picture focuses child window 2 and 3 into the 20th two field picture as interference child window.It is so final
Definite interference child window includes focusing child window 1, burnt child window 2 and 3 for interference child window, remaining is all normal focusing
Window.
Fig. 6 is the second division schematic diagram of focusing window in the embodiment of the present invention, as shown in fig. 6, can also will be in Fig. 4
Focusing window 40 can also be divided into the focusing child window of 25 80 × 80, including focusing child window 1 to focusing child window 25.It is false
The leaf that floatd suddenly is located in focus process Scene, and the movement of leaf causes focusing child window 20 and focusing
The mutation of the brightness value of window 25 makes focusing child window 20 and 25 become interference child window.Therefore, when calculating FV values, need
Focus in each two field picture child window 20 and child window 25 of focusing are rejected, only utilizes remaining 23 child windows of normally focusing
Contrast value calculates FV values.
Step 507：The FV values of each two field picture are calculated using the contrast of all normal focusing child windows, obtain M
FV values.
Here, the contrast of a two field picture is FV values, therefore, can be calculated according to the following formula in each two field picture
FV values：
Wherein, n is normal focusing child window quantity, CiFor the contrast of i-th of normal focusing child window.
In actual implementation, can focusing child window be worth to according to the parameter of each pixel in focusing child window
Contrast.Specifically, the contrast C of i-th of focusing child window in a two field picture is calculated by the following formulai：
Wherein, m is the pixel quantity that includes in focusing child window, QjThe brightness of j-th of pixel in focusing child window
Value.
In the embodiment of the present invention, FV values can be interpreted as the contrast of image it can be appreciated that clarity, is all to use
Come embody focusing whether successful parameter.
Step 508：The M FV value according to obtaining is focused.
In order to more embody the purpose of the present invention, on the basis of first embodiment of the invention and second embodiment, with
It is further illustrated exemplified by focus process.
3rd embodiment
Fig. 7 is the flow chart of the 3rd embodiment for the method focused in the embodiment of the present invention, as shown in fig. 7, the flow bag
It includes：
Step 701：Determine interference child window all in focusing window and normal focusing child window.
Step 702：FV values are calculated using the contrast of all normal focusing child windows in each two field picture, obtain M
FV values.
Specifically, the contrast of each normal focusing child window is added up, the FV values of a two field picture are obtained.
Step 703：It is carried out curve fitting using M obtained FV value, obtains FV curves.
It it is one according to the curve shape that M FV value is fitted since FV curves have unimodality in actual implementation
The shape similar with " normal distribution curve ", position of the focus point corresponding to FV humps, by the top for searching for FV curves
Point or vertex neighbouring position determine the focusing position of camera lens.
Step 704：Coarse search is carried out to FV curves, determines the lens location scope where FV humps.
In the embodiment of the present invention, camera lens moving range is first subjected to rough segmentation.For example, camera lens moving range is between 0-1cm,
Camera lens often moves 1mm acquisition FV values, the variation tendency of more two neighboring FV values, when the increase of FV values then continues to continue after 1mm
FV values are gathered, and are judged in the same way.When FV values start to reduce, determine at the position with being song at a upper position
Line vertex location.
Specifically, Fig. 8 is the schematic diagram of FV curves in the embodiment of the present invention, as shown in figure 8, FV curvilinear abscissas are camera lens
Position, ordinate are the corresponding FV values of lens location.The motor driving camera lens of camera is obtained in different position in focus process
The FV values of corresponding position are taken, in initial scanning process, motor can drive camera lens to carry out the larger search of step-length, for example,
The drivable total kilometres of motor are 1000, then during advance coarse scanning, set the step-length of motor driving camera lens as 100,
The distance that i.e. motor driving camera lens once advances is 100, and motor often drives camera lens once, obtains the corresponding picture of a lens location
The FV values in face.In Fig. 8, motor drives camera lens by A points → B points, B points → C points, C points → D points, D points → E points, E points → F points,
During A points to C, the corresponding FV values of lens location gradually increase, and when C points are to D points, the corresponding FV values of lens location are opened
Begin to reduce, then judge motor driving camera lens passed by FV values maximum when corresponding lens location, i.e. C points are between D points, and end is slightly
Scanning step simultaneously enters close scanning step.
Step 705：Fine searching is carried out to the lens location scope where FV vertex, determines hump.
Here, the lens location corresponding to vertex is final focusing position.In this step, where vertex is determined
After lens location scope, lens location scope is finely divided, to determine the corresponding lens location of maximum FV values.For example, top
Point location is 1mm, and camera lens often moves 0.2mm acquisition FV values in the range, and using the same comparison side of step 704
Method, determines maximum FV values, and definite maximum FV values are the vertex of FV curves.
Illustratively, in fig. 8 determine vertex location for C points to D points, next need to C points between D points
Curve carries out close scanning.Specifically, the step-length of motor driving cam lens is smaller, the distance such as driven every time is 25.Motor
Driving camera lens go ahead since C points 4 steps reach D points, i.e., by C points → H points, H points → I points, I points → J points, J points → D, by C
During point arrives H points, the corresponding FV values of lens location gradually increase；During by H points to D points, lens location corresponds to
FV values be gradually reduced, i.e. the corresponding FV of H point lens locations be higher than C points and the corresponding FV values of I point lens locations, determine that H points W is
The vertex of the FV curves of fitting, driving camera lens reach the corresponding lens location of H points, complete focusing and complete.Alternatively, it is located in camera lens
Determine that vertex is located at C points between D points during D points, motor drives camera lens to be gone back 4 steps by D points, i.e., by D points → J points, J points → I
Point, I points → H points, H points → C points, again may be by close scanning and determine lens location.
It should be noted that the exemplary only explanation of process of focusing is completed above by the FV curves after fitting,
The method that the existing FV using after fitting focuses during actual implementation can be applied in the embodiment of the present invention, therefore herein not
It is limited.
A kind of method of focusing provided in an embodiment of the present invention, this method specifically include：Focusing window is divided into N in advance
A focusing child window；In focus process, the focusing of all focusing child windows in each two field picture in continuous N two field picture is obtained
Parameter；Focusing parameter includes：First parameter and the second parameter, N and M take the integer more than 1；It is true according to the first parameter of acquisition
Surely the focusing child window of disturbed condition is met for interference child window；Using normally focusing in each two field picture in M two field pictures
Second parameter of child window calculates the FV values of each two field picture, obtains M FV value；Normal focusing child window is each two field picture
In except it is all interference child windows in addition to focusing child window；The M FV value according to obtaining is focused.
Using above-mentioned technical proposal, existing focusing area is first divided into multiple focusing subregions, it is right to obtain each
The Focusing parameter of burnt subregion identifies the focusing sub-district of Focusing parameter generation large change in image further according to Focusing parameter
These regions are defined as interference region by domain, and each frame is calculated using the normal focusing subregion for removing all interference regions
The FV values of image, the FV values so as to ensure are carried out again from influences such as object movement or variations using M obtained FV value
Focusing, is determined the focusing position of camera lens, is finally shot using definite focusing position, obtain clearly image.In this way, energy
Enough influences for reducing mobile or variation object to focusing, improve focusing accuracy.
Fourth embodiment
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of terminal.Fig. 9 is terminal in the embodiment of the present invention
Composition structure diagram, as shown in figure 9, the terminal 90 includes：Processor 901 and memory 902, wherein,
Processor 901 is used to perform the focusing program stored in memory 902, to realize following steps：
The processor 901 is used to perform the focusing program stored in memory 902, to realize following steps：
Focusing window is divided into N number of focusing child window in advance；N takes the integer more than 1；
In focus process, the Focusing parameter of all focusing child windows in each two field picture in continuous N two field picture is obtained；
The Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1；
Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window；
Each frame figure is calculated using the second parameter of child window of normally focusing in each two field picture in the M two field pictures
The FV values of picture obtain M FV value；The normal focusing child window in each two field picture in addition to all interference child windows
Focusing child window；
The M FV value according to obtaining is focused.
Illustratively, the first parameter can be the common image parameters such as brightness value or color value, and the second parameter can also
For the image parameter that contrast etc. is common.
In focus process, motor driving camera lens is moved at short focus at long-focus, and each certain moving step length obtains
A two field picture is taken, by the clarity of the Focusing parameter detection image of acquisition, and determines the mirror of the highest two field picture of clarity
Head position is focusing position, and current scene is shot in focusing position, can obtain most clearly image.
In the embodiment of the present invention, whether the first parameter is interference child window for the child window that judges to focus.Illustratively, institute
It can be brightness value or color value to state the first parameter；Correspondingly, the disturbed condition includes：Arbitrary neighborhood in the M two field pictures
The first Parameters variation amount of the focusing child window of same position is more than change threshold in two field pictures.
In the embodiment of the present invention, the second parameter is used to calculate the FV values of each two field picture.Illustratively, second parameter
For contrast；The processor 901 is specifically used for performing the focusing program stored in memory 902, to realize following steps：Profit
The FV values of each two field picture are calculated with the contrast for child window of normally focusing in each two field picture in the M two field pictures.
In actual implementation, the processor 901 is specifically used for performing the focusing program stored in memory 902, with reality
Existing following steps：FV values in each two field picture are calculated according to the following formula：
Wherein, n is normal focusing child window quantity, CiFor the contrast of i-th of normal focusing child window.
In actual implementation, can focusing child window be worth to according to the parameter of each pixel in focusing child window
Contrast.Specifically, the contrast C of i-th of focusing child window in a two field picture is calculated by the following formulai：
Wherein, m is the pixel quantity that includes in focusing child window, QjThe brightness of j-th of pixel in focusing child window
Value.
In actual implementation, the processor 901 is specifically used for：FV curves are fitted using M obtained FV value, are searched for
The corresponding position of maximum FV values is to complete to focus in the FV curves.Specifically, after the FV curves of fitting are obtained, first to song
Line carries out coarse search, determines FV humps location；Opposite vertexes location carries out fine searching again, determines that vertex position is complete
Into focusing.
In the embodiment of the present invention, terminal 90 can be mobile terminal 100 shown in FIG. 1, and processor 901 can be mobile whole
Processor 110 in end 100, memory 902 can be the memory 109 in mobile terminal 100.
In practical applications, above-mentioned processor can be application-specific IC (ASIC, Application
Specific Integrated Circuit), digital signal processing device (DSPD, Digital Signal Processing
Device), programmable logic device (PLD, Programmable Logic Device), field programmable gate array
At least one of (Field-Programmable Gate Array, FPGA), controller, microcontroller, microprocessor.It can
To understand ground, for different equipment, it can also be other to be used to implement the electronic device of above-mentioned processor function, and the present invention is real
Example is applied to be not especially limited.
Above-mentioned memory can be volatile memory (volatile memory), such as random access memory (RAM,
Random-Access Memory)；Or nonvolatile memory (non-volatile memory), such as read-only memory
(ROM, Read-Only Memory), flash memory (flash memory), hard disk (HDD, Hard Disk Drive) or solid
State hard disk (SSD, Solid-State Drive)；Or the combination of the memory of mentioned kind, and to processor provide instruction and
Data.
In addition, each function module in the present embodiment can be integrated in a processing unit or each list
Member be individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated unit both can be with
It is realized, can also be realized in the form of software function module in the form of hardware.
If integrated unit realizes that being not intended as independent product is sold or made in the form of software function module
Used time can be stored in a computer read/write memory medium, based on such understanding, the technical solution sheet of the present embodiment
The part to contribute in other words to the prior art in matter or all or part of the technical solution can be with software products
Form embodies, which is stored in a storage medium, is used including some instructions so that a meter
It calculates machine equipment (can be personal computer, server or the network equipment etc.) or processor (processor) performs this implementation
The all or part of step of example method.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read
Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with
Store the medium of program code.
In actual implementation, when being focused using above-mentioned terminal, mobile or variation object can be reduced to focusing
It influences, improves focusing accuracy.
5th embodiment
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of computer readable storage medium, such as including
The memory of computer program, above computer program can be performed by the processor of terminal, foregoing one or more to complete
Method and step in a embodiment.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those elements, and
And it further includes other elements that are not explicitly listed or further includes as this process, method, article or device institute inherently
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
Also there are other identical elements in the process of element, method, article or device.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme substantially in other words does the prior art
Going out the part of contribution can be embodied in the form of software product, which is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), used including some instructions so that a station terminal (can be mobile phone, computer services
Device, air conditioner or network equipment etc.) method that performs each embodiment of the present invention.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned specific embodiment is only schematical rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, present inventive concept and scope of the claimed protection are not being departed from, can also made very much
Form, these are belonged within the protection of the present invention.
Claims (10)
- A kind of 1. method of focusing, which is characterized in that the described method includes：Focusing window is divided into N number of focusing child window in advance；N takes the integer more than 1；In focus process, the Focusing parameter of all focusing child windows in each two field picture in continuous N two field picture is obtained；It is described Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1；Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window；Each two field picture is calculated using the second parameter of child window of normally focusing in each two field picture in the M two field pictures To coke number FV values, M FV value is obtained；The normal focusing child window in each two field picture in addition to all interference child windows Focusing child window；The M FV value according to obtaining is focused.
- 2. according to the method described in claim 1, it is characterized in that, first parameter is brightness value or color value；The disturbed condition includes：In the M two field pictures in arbitrary neighborhood two field pictures the focusing child window of same position the One Parameters variation amount is more than change threshold.
- 3. according to the method described in claim 1, it is characterized in that, second parameter is contrast；The Focusing parameter of child window of normally focusing in each two field picture using in the M two field pictures calculates each frame figure The FV values of picture, including：It is calculated using the contrast for child window of normally focusing in each two field picture in the M two field pictures each The FV values of two field picture.
- 4. according to the method described in claim 3, it is characterized in that, in each two field picture using in the M two field pictures The contrast of normal focusing child window calculates the FV values of each two field picture, including：Each two field picture is calculated according to the following formula In FV values：<mrow> <mi>F</mi> <mi>V</mi> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>C</mi> <mi>i</mi> </msub> </mrow>Wherein, n is normal focusing child window quantity, CiFor the contrast of i-th of normal focusing child window.
- 5. according to the method described in claim 1, it is characterized in that, the M FV value that the basis obtains carry out focusing include：Profit FV curves are fitted with M obtained FV value, search for the position that maximum FV values are corresponding in the FV curves to complete to focus.
- 6. a kind of terminal, which is characterized in that the terminal includes：Processor and memory；Wherein,The processor is used to perform the focusing program stored in memory, to realize following steps：Focusing window is divided into N number of focusing child window in advance；N takes the integer more than 1；In focus process, the Focusing parameter of all focusing child windows in each two field picture in continuous N two field picture is obtained；It is described Focusing parameter includes：First parameter and the second parameter, M take the integer more than 1；Determine to meet the focusing child window of disturbed condition according to the first parameter of acquisition as interference child window；Each two field picture is calculated using the second parameter of child window of normally focusing in each two field picture in the M two field pictures To coke number FV values, M FV value is obtained；The normal focusing child window in each two field picture in addition to all interference child windows Focusing child window；The M FV value according to obtaining is focused.
- 7. terminal according to claim 6, which is characterized in that first parameter is brightness value or color value；The disturbed condition includes：In the M two field pictures in arbitrary neighborhood two field pictures the focusing child window of same position the One Parameters variation amount is more than change threshold.
- 8. terminal according to claim 6, which is characterized in that second parameter is contrast；The processor is specifically used for performing the focusing program stored in memory, to realize following steps：Utilize the M frames figure The contrast of child window of normally focusing in each two field picture as in calculates the FV values of each two field picture.
- 9. terminal according to claim 8, which is characterized in that the processor is specifically used for performing what is stored in memory Focusing program, to realize following steps：FV values in each two field picture are calculated according to the following formula：<mrow> <mi>F</mi> <mi>V</mi> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>C</mi> <mi>i</mi> </msub> </mrow>Wherein, n is normal focusing child window quantity, CiFor the contrast of i-th of normal focusing child window.
- 10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt The step of processor realizes method described in any one of claim 1 to 5 when performing.
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