CN108200421A - A kind of white balancing treatment method, terminal and computer readable storage medium - Google Patents
A kind of white balancing treatment method, terminal and computer readable storage medium Download PDFInfo
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- CN108200421A CN108200421A CN201711459257.3A CN201711459257A CN108200421A CN 108200421 A CN108200421 A CN 108200421A CN 201711459257 A CN201711459257 A CN 201711459257A CN 108200421 A CN108200421 A CN 108200421A
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- index value
- light source
- frame image
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- current frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
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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
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
Abstract
The embodiment of the invention discloses a kind of white balancing treatment method, the corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；The pre-stored weight table includes：The correspondence of default exposure index value and default weight group；The automatic white balance AWB parameters of current frame image are determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source, so that carrying out white balance processing to current taken image by the AWB parameters.The embodiment of the invention discloses a kind of terminal and computer readable storage mediums, improve the accuracy of AWB, can carry out white balance processing to image automatically, and effect is presented in the picture for improving image procossing.
Description
Technical field
The present invention relates to the image processing techniques in field of information processing more particularly to a kind of white balancing treatment method, ends
End and computer readable storage medium.
Background technology
With the continuous development of electronics technology, the development with the terminal especially picture pick-up device of shooting function is also prominent flies
Push ahead vigorously, so that requirement of the user to the picture quality (for example, real colour degree) of picture pick-up device is also higher and higher.
In the prior art, it when carrying out automatic white balance (AWB, Automatic white balance) processing, calculates each
A benchmark point range is too rough, only counts drop point number by dichotomy division, and many critical point judgements might have
Therefore error, influences final AWB judgements.
Invention content
In order to solve the above technical problems, a kind of white balancing treatment method of offer of the embodiment of the present invention, terminal and computer can
Storage medium is read, improves the accuracy of AWB, can white balance processing be carried out to image automatically, the picture for improving image procossing is in
Existing effect.
The technical proposal of the invention is realized in this way：
In a first aspect, the embodiment of the present invention provides a kind of white balancing treatment method, the method includes：
The corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；
The pre-stored weight table includes：The correspondence of default exposure index value and default weight group；
Present frame figure is determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source
The automatic white balance AWB parameters of picture, so that the AWB parameters by the current frame image put down current taken image in vain
Weighing apparatus processing.
Further, the exposure index value according to shooting environmental and pre-stored weight table determine current environment light source
Corresponding weight group, including：
The identical default exposure index of the exposure index value of the shooting environmental is searched in the pre-stored weight table
Value；
If the default exposure identical with the exposure index value of the shooting environmental is not present in the pre-stored weight table
Index value presets the in the pre-stored weight table first default corresponding first default weight group of index value and second that exposes
It exposes the corresponding second default weight group of index value and carries out the corresponding weight group of the interpolation calculation acquisition current environment light source；
Wherein, the described first default exposure index value and the second default exposure index value are：The pre-stored power
The two default exposure index values minimum with the difference of the exposure index value of the shooting environmental in weight table, the shooting environmental
It exposes index value and is more than the described first default exposure index value, and the exposure index value of the shooting environmental is pre- less than described second
If expose index value.
Further, it is described according to all statistics points of current frame image and the corresponding weight group of the current environment light source
Determine the automatic white balance AWB parameters of current frame image, including：
All statistics points of current frame image are obtained, all statistics points are subjected to position in R/G, B/G coordinate system
Distribution calculates the statistics point number fallen into each segmentation limit of each light source reference point, wherein, each light source reference
Every section of point includes multiple segmentations；
It is determined currently according to the statistics point number in each segmentation limit and the corresponding weight group of the current environment light source
The AWB parameters of frame image.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, including：
The AWB parameters of k frame images before the current frame image are obtained, by the AWB parameters of the k frames and the present frame
The AWB parameters of image are weighted processing, the AWB parameters that obtain that treated, so that passing through treated the AWB parameters pair
Current taken image carries out white balance processing.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, including：
Preserve the AWB parameters of the current frame image and the corresponding weight group of the current environment light source.
Second aspect, the embodiment of the present invention also provide a kind of terminal simultaneously, and the terminal includes：Processor, memory and
Communication bus；
The communication bus is used to implement the connection communication between processor and memory；
The processor is used to perform the white balance processing routine stored in memory, to realize following steps：
The corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；
The pre-stored weight table includes：The correspondence of default exposure index value and default weight group；
Present frame figure is determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source
The automatic white balance AWB parameters of picture, so that the AWB parameters by the current frame image put down current taken image in vain
Weighing apparatus processing.
Further, the processor is used to perform the white balance processing routine stored in memory, to realize following walk
Suddenly：
The identical default exposure index of the exposure index value of the shooting environmental is searched in the pre-stored weight table
Value；
If the default exposure identical with the exposure index value of the shooting environmental is not present in the pre-stored weight table
Index value presets the in the pre-stored weight table first default corresponding first default weight group of index value and second that exposes
It exposes the corresponding second default weight group of index value and carries out the corresponding weight group of the interpolation calculation acquisition current environment light source；
Wherein, the described first default exposure index value and the second default exposure index value are：The pre-stored power
The two default exposure index values minimum with the difference of the exposure index value of the shooting environmental in weight table, the shooting environmental
It exposes index value and is more than the described first default exposure index value, and the exposure index value of the shooting environmental is pre- less than described second
If expose index value.
Further, the processor is used to perform the white balance processing routine stored in memory, to realize following walk
Suddenly：
All statistics points of current frame image are obtained, all statistics points are subjected to position in R/G, B/G coordinate system
Distribution calculates the statistics point number fallen into each segmentation limit of each light source reference point, wherein, each light source reference
Every section of point includes multiple segmentations；
It is determined currently according to the statistics point number in each segmentation limit and the corresponding weight group of the current environment light source
The AWB parameters of frame image.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, the processor is additionally operable to store in execution memory white
Balance Treatment program, to realize following steps：
The AWB parameters of k frame images before the current frame image are obtained, by the AWB parameters of the k frames and the present frame
The AWB parameters of image are weighted processing, the AWB parameters that obtain that treated, so that passing through treated the AWB parameters pair
Current taken image carries out white balance processing.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, the processor is additionally operable to store in execution memory white
Balance Treatment program, to realize following steps：
Preserve the AWB parameters of the current frame image and the corresponding weight group of the current environment light source.
The third aspect, the embodiment of the present invention also provide a kind of computer readable storage medium simultaneously, described computer-readable
Storage medium is stored with one or more program, and one or more of programs can be held by one or more processor
Row, with realize as above any one of them method the step of.
An embodiment of the present invention provides a kind of white balancing treatment method, terminal and computer readable storage medium, according to bat
It takes the photograph the exposure index value of environment and pre-stored weight table determines the corresponding weight group of current environment light source；The pre-stored power
Weight table includes：The correspondence of default exposure index value and default weight group；According to all statistics points of current frame image and
The corresponding weight group of the current environment light source determines the automatic white balance AWB parameters of current frame image, so that by described
The AWB parameters of current frame image carry out white balance processing to current taken image.White balance processing provided in an embodiment of the present invention
Method, terminal and computer readable storage medium determine the corresponding weight group of current environment light source according to pre-stored weight table,
So that it is determined that AWB parameters, improve the accuracy of AWB, can realize and carry out white balance processing to image automatically, improve image procossing
Picture present effect.
Description of the drawings
The hardware architecture diagram of Fig. 1 optional mobile terminal of each embodiment 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 white balancing treatment method flow diagram one provided in an embodiment of the present invention；
Fig. 4 is statistics point position distribution exemplary plot in R/G, B/G coordinate system provided in an embodiment of the present invention；
Fig. 5 is every section of refinement fragmentation example figure of datum mark provided in an embodiment of the present invention；
Fig. 6 is that the weight of every group of 31 points of N groups provided in an embodiment of the present invention represents illustration；
Fig. 7 is white balancing treatment method flow diagram two provided in an embodiment of the present invention；
Fig. 8 is terminal structure schematic diagram provided in an 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), navigation device, wearable device, Intelligent bracelet, pedometer
The dynamic fixed terminals such as terminal and number TV, desktop computer.
It will be illustrated by taking mobile terminal as an example in subsequent descriptions, it will be appreciated by those skilled in the art that in addition to special
For moving except 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 certain 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 receive and send messages or communication process in, signal sends and receivees, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, the data of uplink are sent 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 communicate with network and other equipment by radio communication.Above-mentioned wireless communication can use any communication
Standard or agreement, including 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 Access2000, 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 range for the 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, it is that radio frequency unit 101 or WiFi module 102 are received or
The audio 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 (audio data), and can be audio 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, can be used to identify the application of 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 used
Display panel 1061 is configured in forms such as (Organic Light-Emitting Diode, OLED).
User input unit 107 can be used for receiving the number inputted 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 multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to 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, operating lever etc.
It is 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) connect 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
Audio 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
Processing wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also include the power supply 111 (such as battery) powered to all parts, 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
The LTE system united as universal mobile communications technology, the LTE system include the UE (User Equipment, the use that communicate 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 connect 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 GateWay,
Gateway) 2034, PGW (PDN GateWay, 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 EPC203 between
The control node of signaling, provides carrying and connection management.HSS2032 is used to provide some registers to manage such as homing position
The function of register (not shown) etc, and some are preserved in relation to the dedicated letter of the users such as service features, data rate
Breath.All customer data can be sent by SGW2034, PGW2035 can provide UE 201 IP address distribute with
And other functions, PCRF2036 are business data flow and the strategy of IP bearing resources and charging control policy decision point, it is plan
Available strategy and charging control decision are slightly selected and provided with charge execution function unit (not shown).
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.
It should be noted that term " first ", " second " in description and claims of this specification and attached drawing etc.
It is the object for distinguishing similar, specific sequence or precedence is described without being used for.
The embodiment of the present invention provides a kind of white balancing treatment method, and applied to terminal, function that this method is realized can be with
It is realized by the processor caller code in terminal, certain program code can be stored in computer storage media,
As it can be seen that the terminal includes at least pocessor and storage media.Fig. 3 is a kind of white balancing treatment method provided in an embodiment of the present invention
Realization flow diagram, as shown in figure 3, this method may comprise steps of：
Step 301 determines that current environment light source is corresponded to according to the exposure index value and pre-stored weight table of shooting environmental
Weight group.
Wherein, the pre-stored weight table includes：The correspondence of default exposure index value and default weight group.
Specifically, in the embodiment of the present invention, determine to work as according to the exposure index value of shooting environmental and pre-stored weight table
The corresponding weight group of preceding environment light source can be performed by terminal, i.e., terminal is according to the exposure index value of shooting environmental and pre-
The weight table of storage determines the corresponding weight group of current environment light source.Here, terminal can be that the terminal with shooting function is set
It is standby, for example, mobile phone, tablet computer etc..
Specifically, when user wants to pass through mobile phone photograph, operated on mobile phone, the camera shooting opened on mobile phone should
With, such as mobile phone, after opening the camera on mobile phone, the exposure index value of current shooting environment is obtained, the exposure index value is used
In the brightness for representing current shooting environment, searched and worked as in pre-stored weight table according to the exposure index value of current shooting environment
The corresponding weight group of exposure index value of preceding shooting environmental.Weight table is prestored in terminal, in the pre-stored weight table
It stores different default exposure index values and Bu Tong presets the correspondence of weight group, the acquisition for the weight table being specifically pre-stored is such as
It is lower described.
In currently existing scheme, terminal counts all statistics points of current scene, then according to statistics point in R/G, B/G coordinate
Position distribution in system calculates statistics the point number N and central point P fallen into each light source reference point range, according to each datum mark
Interior N calculates the number weight W of each datum mark, final weight distribution center position is asked to judge for current AWB with reference to each W and P
Point.
A datum mark of the statistics point of pure grey object for current light source under current light source, as shown in figure 4, the above process is to scheme
It is illustrated for 4, big dot is red spots in figure, and red spots (have 9 benchmark for the datum mark of each light source in figure
Point)；Blue section (region that blockage is formed), yellow section (region that big square is formed), (dot is formed for red section
Region) be when the collected statistics point of preceding camera；Yellow dot is to combine each light source weight and statistics point position letter
The final AWB postulated points of breath.
But the method for the above-mentioned prior art has certain deficiency, i.e., only considers to fall into a number, calculate its number power
Weight, that is, the statistics point fallen into around datum mark is more, then the datum mark influences final awb points bigger, and datum mark is in itself not
There is setting weight；When scene is very bright, it is outdoor scene that there is a strong possibility, at this moment falls into day regions (D75/D65/D50/
NOON the statistics point referential in) is higher, and weight should be larger, and other drop point referentials are little；When scene is general brightness
It is at this moment indoor either half-light environment falls into indoor regions (TL84/CW) or A/H areas that there is a strong possibility when either low bright
The statistics point referential in domain is higher, and weight should be larger, and other drop point referentials are little；And calculate each benchmark point range
It is too rough, drop point number only is counted by dichotomy division, many critical point judgements might have error, and then influence
Final judgement.
To improve the AWB accuracys of existing method, method provided in an embodiment of the present invention, previously according to different exposure values
Index value ae index N number of weight group is set, wherein, the index value of exposure value may determine that present intensity environment, divided chamber
Outer outdoor, outdoor block outdoor_shade, interior indoor, brightness color dark etc., and brighter environment index value is more
Small, darker index value is bigger.Then according to each light source reference point position distribution, continuing refinement between its every section, to be divided into 4 small
Section, 31 section points, as shown in figure 5, setting its light source weight W1 (range 0-10) respectively to every section, can obtain N at this time in total
The weight table of every group of 31 points of group, as shown in 6 figures.
Step 302 is determined according to all statistics points and the corresponding weight group of the current environment light source of current frame image
The automatic white balance AWB parameters of current frame image, so that by the AWB parameters of the current frame image to current taken image
Carry out white balance processing.
Specifically, when AWB is calculated, terminal can first according to environment index, interpolation goes out one from the remittance of N group weights table
Group weight table then in conjunction with distribution in the weight table and each segmentation, calculates final AWB as a result, i.e. AWB parameters, pass through AWB
Parameter carries out white balance processing to current taken image.
Wherein, white balance is a concept of the utmost importance of image procossing.So-called white balance (White Balance) is exactly
Reduction to white object.Object is under different light source irradiations, and the color of presentation is different, this is that the colour temperature for having light source is determined
Fixed, it makes object reflectance spectrum have certain deviation compared with realistic colour, wherein, white object variation is the most apparent, indoors
Under the irradiation of low colour temperature as tungsten light, white object may appear to the tone with crocus, in such illumination condition
Under take the object come will be partially yellow, but if under the irradiation of high color temperature as azure sky, then can carry blue color
It adjusts.The purpose of automatic white balance AWB is exactly to eliminate color error ratio caused by different light sources so that shoots the photo come and accords with as possible
Close the custom of human eye.
White balancing treatment method provided in an embodiment of the present invention determines current environment light source pair according to pre-stored weight table
The weight group answered, so that it is determined that AWB parameters, improve the accuracy of AWB, can realize and carry out white balance processing to image automatically,
Effect is presented in the picture for improving image procossing.
The embodiment of the present invention provides a kind of white balancing treatment method, and applied to terminal, function that this method is realized can be with
It is realized by the processor caller code in terminal, certain program code can be stored in computer storage media,
As it can be seen that the terminal includes at least pocessor and storage media.Fig. 7 is a kind of white balancing treatment method provided in an embodiment of the present invention
Realization flow diagram, as shown in fig. 7, this method may comprise steps of：
Step 401, the exposure index value for obtaining current shooting environment.
Wherein, the exposure index value is used to represent the brightness of current shooting environment.
Specifically, terminal obtains the exposure index value of current shooting environment, the index value of exposure value may determine that current bright
Environment is spent, brighter environment index value is smaller, and darker index value is bigger.
Step 402 searches the identical default exposure of the exposure index value of the shooting environmental in pre-stored weight table
Index value, if the default exposure rope identical with the exposure index value of the shooting environmental is not present in the pre-stored weight table
Draw value, the in the pre-stored weight table first default corresponding first default weight group of index value and second that exposes is preset into exposure
The corresponding second default weight group of light index value carries out interpolation calculation and obtains the corresponding weight group of the current environment light source.
Wherein, the described first default exposure index value and the second default exposure index value are：The pre-stored power
The two default exposure index values minimum with the difference of the exposure index value of the shooting environmental in weight table, the shooting environmental
It exposes index value and is more than the described first default exposure index value, and the exposure index value of the shooting environmental is pre- less than described second
If expose index value.
Specifically, terminal searches the identical default exposure of exposure index value of the shooting environmental in pre-stored weight table
Light index value, if the default exposure index value that the exposure index value for finding shooting environmental is identical, the default exposure index value
Corresponding default power is reassembled as the corresponding weight group of current environment light source.
Wherein, interpolation method is also known as " interpolation method ", if being to utilize function f (x) known functional values done in certain section,
Appropriate specific function is made, it is this by the use of the value of this specific function as the approximation of function f (x) on other aspects in section
Method is known as interpolation method.I.e. in known function table, it is inserted into median do not listed in some tables, required.
Illustratively, it if the exposure index value of shooting environmental is 100, can be obtained according in table as shown in Figure 6, with institute
Two default exposure index values for stating the difference minimum of the exposure index value 100 of shooting environmental are 95 and 143, i.e., the first default exposure
Light index value is 95, the second default exposure index value 143, the first default exposure 95 corresponding first default weight group of index value
{ 1,1,1,5,5,5,5,5,5,5,5,5,5,5,5,3,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0, }, the second default exposure
95 corresponding second default weight group of index value 1,1,1,5,5,5,5,5,5,5,5,5,5,5,5,3,1,0,0,0,0,0,0,0,
0,0,0,0,0,0,0, }, then interpolation calculation is carried out according to the first default weight group and the second default weight group and obtain shooting environmental
Exposure index value for 100 corresponding weight groups, specific interpolation calculation process can be realized by existing algorithm, and the present invention is implemented
Details are not described herein for example.
Step 403, all statistics points for obtaining current frame image carry out all statistics points in R/G, B/G coordinate system
Position distribution calculates the statistics point number fallen into each segmentation limit of each light source reference point, according to each segmentation limit
Interior statistics point number and the corresponding weight group of the current environment light source determine the AWB parameters of current frame image.
Specifically, refinement segmentation will be carried out between every section of each light source reference point in advance, and therefore, each light source reference point
Every section include multiple segmentations.Such as 5 shown in figure, according to each light source reference point position distribution, will continue between its every section thin
4 segments are divided into, in total 31 section points.
Specifically, when AWB is calculated, terminal can first according to environment index, interpolation goes out one from the remittance of N group weights table
Group weight table then in conjunction with distribution in the weight table and each segmentation, calculates final AWB as a result, i.e. AWB parameters, pass through AWB
Parameter carries out white balance processing to current taken image.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, including：
Preserve the AWB parameters of the current frame image and the corresponding weight group of the current environment light source.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, including：
The AWB parameters of k frame images before the current frame image are obtained, by the AWB parameters of the k frames and the present frame
The AWB parameters of image are weighted processing, the AWB parameters that obtain that treated, so that passing through treated the AWB parameters pair
Current taken image carries out white balance processing.
Specifically, can set history history message queues when shooting, the AWB of K frames is as a result, setting before preservation
Its weight be W2, be weighted processing with present frame AWB results, so as to it is smooth currently AWB output as a result, preventing AWB
As a result saltus step.
White balancing treatment method provided in an embodiment of the present invention determines current environment light source pair according to pre-stored weight table
The weight group answered, so that it is determined that AWB parameters, improve the accuracy of AWB, can realize and carry out white balance processing to image automatically,
Effect is presented in the picture for improving image procossing.
The embodiment of the present invention also provides a kind of terminal 50 simultaneously, as shown in figure 8, the terminal 50 includes：Processor 501,
Memory 502 and communication bus 503；
The communication bus 503 is used to implement the connection communication between processor 501 and memory 502；
The processor 501 is used to perform the white balance processing routine stored in memory 502, to realize following steps：
The corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；
The pre-stored weight table includes：The correspondence of default exposure index value and default weight group；
Present frame figure is determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source
The automatic white balance AWB parameters of picture, so that the AWB parameters by the current frame image put down current taken image in vain
Weighing apparatus processing.
Further, the processor 501 is used to perform the white balance processing routine stored in memory 502, to realize
Following steps：
The identical default exposure index of the exposure index value of the shooting environmental is searched in the pre-stored weight table
Value；
If the default exposure identical with the exposure index value of the shooting environmental is not present in the pre-stored weight table
Index value presets the in the pre-stored weight table first default corresponding first default weight group of index value and second that exposes
It exposes the corresponding second default weight group of index value and carries out the corresponding weight group of the interpolation calculation acquisition current environment light source；
Wherein, the described first default exposure index value and the second default exposure index value are：The pre-stored power
The two default exposure index values minimum with the difference of the exposure index value of the shooting environmental in weight table, the shooting environmental
It exposes index value and is more than the described first default exposure index value, and the exposure index value of the shooting environmental is pre- less than described second
If expose index value.
Further, the processor 501 is used to perform the white balance processing routine stored in memory 502, to realize
Following steps：
All statistics points of current frame image are obtained, all statistics points are subjected to position in R/G, B/G coordinate system
Distribution calculates the statistics point number fallen into each segmentation limit of each light source reference point, wherein, each light source reference
Every section of point includes multiple segmentations；
It is determined currently according to the statistics point number in each segmentation limit and the corresponding weight group of the current environment light source
The AWB parameters of frame image.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, the processor 501 is additionally operable to perform and be deposited in memory 502
The white balance processing routine of storage, to realize following steps：
The AWB parameters of k frame images before the current frame image are obtained, by the AWB parameters of the k frames and the present frame
The AWB parameters of image are weighted processing, the AWB parameters that obtain that treated, so that passing through treated the AWB parameters pair
Current taken image carries out white balance processing.
Further, described according to all statistics points of current frame image and the corresponding weight of the current environment light source
After the automatic white balance AWB parameters of the determining current frame image of group, the processor 501 is additionally operable to perform and be deposited in memory 502
The white balance processing routine of storage, to realize following steps：
Preserve the AWB parameters of the current frame image and the corresponding weight group of the current environment light source.
Here, memory 502 can be volatile memory or nonvolatile memory, may also comprise volatibility and Fei Yi
Both the property lost memories.Wherein, nonvolatile memory can be read-only memory (ROM, Read Only Memory), can compile
Journey read-only memory (PROM, Programmable Read-Only Memory), Erasable Programmable Read Only Memory EPROM
(EPROM, Erasable Programmable Read-Only Memory), electrically erasable programmable read-only memory
(EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access store
Device (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface are deposited
Reservoir, CD or CD-ROM (CD-ROM, Compact Disc Read-Only Memory)；Magnetic surface storage can be
Magnetic disk storage or magnetic tape storage.Volatile memory can be random access memory (RAM, Random Access
Memory), it is used as External Cache.By exemplary but be not restricted explanation, the RAM of many forms can be used, such as
Static RAM (SRAM, Static Random Access Memory), synchronous static RAM
(SSRAM, Synchronous Static Random Access Memory), dynamic random access memory (DRAM,
Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous
Dynamic Random Access Memory), double data speed synchronous dynamic RAM (DDRSDRAM,
Double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random
Access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronized links
Dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct rambus
Random access memory (DRRAM, Direct Rambus Random Access Memory).Description of the embodiment of the present invention is deposited
Reservoir 502 is intended to the including but not limited to memory of these and any other suitable type.
Memory 502 in the embodiment of the present invention is used to store various types of data to support the operation of terminal 50.This
The example of a little data includes：For any computer program operated in terminal 50, such as operating system and application program；Contact
Personal data；Telephone book data；Message；Picture；Video etc..Wherein, operating system include various system programs, such as ccf layer,
Core library layer, driving layer etc. are used to implement various basic businesses and the hardware based task of processing.Application program can include
Various application programs, such as media player (Media Player), browser (Browser) etc., are used to implement various applications
Business.Realize that the program of present invention method may be embodied in application program.
The method that the embodiments of the present invention disclose can be applied to realize in processor 501 or by processor 501.
Processor 501 may be a kind of IC chip, have the processing capacity of signal.During realization, the above method it is each
Step can be completed by the integrated logic circuit of the hardware in processor 501 or the instruction of software form.Above-mentioned processing
Device 501 can be general processor, digital signal processor (DSP, Digital Signal Processor) or other can
Programmed logic device, discrete gate or transistor logic, discrete hardware components etc..Processor 501 can be realized or be held
Disclosed each method, step and logic diagram in the row embodiment of the present invention.General processor can be microprocessor or appoint
What conventional processor etc..It the step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly at hardware decoding
Reason device performs completion or performs completion with the hardware in decoding processor and software module combination.Software module can be located at
In storage medium, which is located at memory 502, and processor 501 reads the information in memory 502, with reference to its hardware
The step of completing preceding method.
Specifically, understanding for terminal provided in an embodiment of the present invention can refer to above-mentioned white balancing treatment method embodiment
Illustrate, details are not described herein for the embodiment of the present invention.
Terminal provided in an embodiment of the present invention determines the corresponding weight of current environment light source according to pre-stored weight table
Group, so that it is determined that AWB parameters, improve the accuracy of AWB, can realize and carry out white balance processing to image automatically, improve image
Effect is presented in the picture of processing.
In the embodiment of the present invention, if realizing above-mentioned white balancing treatment method in the form of software function module, and make
It is independent product sale or in use, can also be stored in a computer read/write memory medium.Based on such reason
Solution, the part that the technical solution of the embodiment of the present invention substantially in other words contributes to the prior art can be with software product
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 network equipment etc.) and performs each embodiment the method for the present invention
All or part.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read Only
Memory), the various media that can store program code such as magnetic disc or CD.In this way, the embodiment of the present invention is not limited to appoint
What specific hardware and software combines.
The embodiment of the present invention provides a kind of computer readable storage medium, and the computer-readable recording medium storage has one
A or multiple programs, one or more of programs can be performed by one or more processor, to realize following steps：
The corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；
The pre-stored weight table includes：The correspondence of default exposure index value and default weight group；
Present frame figure is determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source
The automatic white balance AWB parameters of picture, so that the AWB parameters by the current frame image put down current taken image in vain
Weighing apparatus processing.
More than computer readable storage medium implements the description of item, is similar with above method description, has Tongfang
The identical advantageous effect of method embodiment.For the technical detail not disclosed in computer readable storage medium embodiment of the present invention,
Those skilled in the art please refers to the description of the method for the present invention embodiment and understands.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction
" in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific feature, knots
Structure or characteristic can in any suitable manner combine in one or more embodiments.It should be understood that in the various implementations of the present invention
In example, the size of the serial number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be with its work(
It can be determined with internal logic, the implementation process without coping with the embodiment of the present invention forms any restriction.The embodiments of the present invention
Serial number is for illustration only, does not represent the quality of 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 intrinsic for this process, method, article or device institute
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.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.Apparatus embodiments described above are only schematical, for example, the division of the unit, only
A kind of division of logic function can have other dividing mode, such as in actual implementation：Multiple units or component can combine or
It is desirably integrated into another system or some features can be ignored or does not perform.In addition, shown or discussed each composition portion
Point mutual coupling or direct-coupling or communication connection can be the INDIRECT COUPLINGs by some interfaces, equipment or unit
Or communication connection, can be electrical, mechanical or other forms.
The above-mentioned unit illustrated as separating component can be or may not be physically separate, be shown as unit
The component shown can be or may not be physical unit；Both it can be located at a place, multiple network lists can also be distributed to
In member；Part or all of unit therein can be selected according to the actual needs to realize the purpose of this embodiment scheme.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, also may be used
To be each unit individually as a unit, can also two or more units integrate in a unit；It is above-mentioned
The form that hardware had both may be used in integrated unit is realized, can also be realized in the form of hardware adds SFU software functional unit.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and aforementioned program can be stored in computer read/write memory medium, which exists
During execution, step including the steps of the foregoing method embodiments is performed；And aforementioned storage medium includes：Movable storage device read-only is deposited
The various media that can store program code such as reservoir (ReadOnly Memory, ROM), magnetic disc or CD.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and is independent product
Sale in use, can also be stored in a computer read/write memory medium.Based on such understanding, the present invention is implemented
The technical solution of example substantially in other words can be embodied the part that the prior art contributes in the form of software product,
The computer software product is stored in a storage medium, and being used including some instructions (can be with so that computer equipment
It is personal computer, server or network equipment etc.) perform all or part of each embodiment the method for the present invention.
And aforementioned storage medium includes：Various Jie that can store program code such as movable storage device, ROM, magnetic disc or CD
Matter.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of white balancing treatment method, which is characterized in that the method includes：
The corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；It is described
Pre-stored weight table includes：The correspondence of default exposure index value and default weight group；
Current frame image is determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source
Automatic white balance AWB parameters, so that the AWB parameters by the current frame image carry out at white balance current taken image
Reason.
2. the according to the method described in claim 1, it is characterized in that, exposure index value according to shooting environmental and pre-stored
Weight table determine the corresponding weight group of current environment light source, including：
The identical default exposure index value of the exposure index value of the shooting environmental is searched in the pre-stored weight table；
If the default exposure identical with the exposure index value of the shooting environmental is not present in the pre-stored weight table to index
In the pre-stored weight table first default corresponding first default weight group of index value and second that exposes is preset exposure by value
The corresponding second default weight group of index value carries out interpolation calculation and obtains the corresponding weight group of the current environment light source；
Wherein, the described first default exposure index value and the second default exposure index value are：The pre-stored weight table
In two default exposure index values minimum with the difference of the exposure index value of the shooting environmental, the exposure of the shooting environmental
Index value is more than the described first default exposure index value, and the exposure index value of the shooting environmental is preset less than described second and exposed
Light index value.
3. according to the method described in claim 1, it is characterized in that, all statistics points according to current frame image and described
The corresponding weight group of current environment light source determines the automatic white balance AWB parameters of current frame image, including：
All statistics points of current frame image are obtained, all statistics points are subjected to position distribution in R/G, B/G coordinate system,
The statistics point number fallen into each segmentation limit of each light source reference point is calculated, wherein, each light source reference point
Every section includes multiple segmentations；
Present frame figure is determined according to the statistics point number in each segmentation limit and the corresponding weight group of the current environment light source
The AWB parameters of picture.
4. method according to any one of claims 1 to 3, which is characterized in that described according to all of current frame image
After statistics point weight group corresponding with the current environment light source determines the automatic white balance AWB parameters of current frame image, packet
It includes：
The AWB parameters of k frame images before the current frame image are obtained, by the AWB parameters of the k frames and the current frame image
AWB parameters be weighted processing, the AWB parameters that obtain that treated, so that by treated the AWB parameters to current
It shoots image and carries out white balance processing.
5. method according to any one of claims 1 to 3, which is characterized in that described according to all of current frame image
After statistics point weight group corresponding with the current environment light source determines the automatic white balance AWB parameters of current frame image, packet
It includes：
Preserve the AWB parameters of the current frame image and the corresponding weight group of the current environment light source.
6. a kind of terminal, which is characterized in that the terminal includes：Processor, memory and communication bus；
The communication bus is used to implement the connection communication between processor and memory；
The processor is used to perform the white balance processing routine stored in memory, to realize following steps：
The corresponding weight group of current environment light source is determined according to the exposure index value of shooting environmental and pre-stored weight table；It is described
Pre-stored weight table includes：The correspondence of default exposure index value and default weight group；
Current frame image is determined according to all statistics points of current frame image and the corresponding weight group of the current environment light source
Automatic white balance AWB parameters, so that the AWB parameters by the current frame image carry out at white balance current taken image
Reason.
7. terminal according to claim 6, which is characterized in that the processor be used to perform stored in memory it is white flat
Weigh processing routine, to realize following steps：
The identical default exposure index value of the exposure index value of the shooting environmental is searched in the pre-stored weight table；
If the default exposure identical with the exposure index value of the shooting environmental is not present in the pre-stored weight table to index
In the pre-stored weight table first default corresponding first default weight group of index value and second that exposes is preset exposure by value
The corresponding second default weight group of index value carries out interpolation calculation and obtains the corresponding weight group of the current environment light source；
Wherein, the described first default exposure index value and the second default exposure index value are：The pre-stored weight table
In two default exposure index values minimum with the difference of the exposure index value of the shooting environmental, the exposure of the shooting environmental
Index value is more than the described first default exposure index value, and the exposure index value of the shooting environmental is preset less than described second and exposed
Light index value.
8. terminal according to claim 6, which is characterized in that the processor be used to perform stored in memory it is white flat
Weigh processing routine, to realize following steps：
All statistics points of current frame image are obtained, all statistics points are subjected to position distribution in R/G, B/G coordinate system,
The statistics point number fallen into each segmentation limit of each light source reference point is calculated, wherein, each light source reference point
Every section includes multiple segmentations；
Present frame figure is determined according to the statistics point number in each segmentation limit and the corresponding weight group of the current environment light source
The AWB parameters of picture.
9. according to claim 6 to 8 any one of them terminal, which is characterized in that described according to all of current frame image
After statistics point weight group corresponding with the current environment light source determines the automatic white balance AWB parameters of current frame image, institute
It states processor to be additionally operable to perform the white balance processing routine stored in memory, to realize following steps：
The AWB parameters of k frame images before the current frame image are obtained, by the AWB parameters of the k frames and the current frame image
AWB parameters be weighted processing, the AWB parameters that obtain that treated, so that by treated the AWB parameters to current
It shoots image and carries out white balance processing.
10. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage there are one or
Multiple programs, one or more of programs can be performed by one or more processor, to realize such as claim 1 to 5
The step of any one of them method.
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