CN107690065A - A kind of white balance correcting, device and computer-readable recording medium - Google Patents
A kind of white balance correcting, device and computer-readable recording medium Download PDFInfo
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- CN107690065A CN107690065A CN201710642804.5A CN201710642804A CN107690065A CN 107690065 A CN107690065 A CN 107690065A CN 201710642804 A CN201710642804 A CN 201710642804A CN 107690065 A CN107690065 A CN 107690065A
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- 238000012937 correction Methods 0.000 claims abstract description 69
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- 238000004590 computer program Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 abstract description 8
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- 238000004891 communication Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
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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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Abstract
The invention discloses a kind of method of white balance correction, including：Image to be corrected is obtained, chooses the correcting area of the image to be corrected, subregion or Zone Full of the correcting area for the correction chart picture；When the correcting area is the subregion of the image to be corrected, the colour temperature in statistical-reference region, the reference zone is the region in addition to the correcting area of the image to be corrected, and white balance processing is carried out to the image to be corrected according to the colour temperature of the reference zone；When the correcting area is the Zone Full of the image to be corrected, environment colour temperature is determined, white balance processing is carried out to the image to be corrected according to the environment colour temperature.The embodiment of the present invention also provides the device and computer-readable recording medium for realizing the above method.The present invention can accurately determine to carry out present image the colour temperature of foundation during white balance correction, improve white balance treatment effect, improve picture quality.
Description
Technical field
The present invention relates to electronic technology, more particularly to a kind of white balance correcting, device and computer-readable storage medium
Matter.
Background technology
As the mobile terminals such as the continuous development of computer technology, mobile phone are as portable communication device, brought to user
The facility of mobile communication, at the same mobile terminal can also provide take pictures, the function such as image procossing.With mobile terminal camera function
Using more and more extensive, user is to the requirement taken pictures also more and more higher.And white balance correction have to photographic quality it is vital
Effect.
White balance correction refers to such color adjustment：Detection is due in environment corresponding with input image data
Light source in (that is, the environment captured in the picture) and the white in object color with maximum change, from what is detected
Red/green (RGB) contrast ratio of white determines colour temperature, with reference to the white detected be based on color temperature correction red (R) and
Blue (B), and change whole color sensation to adjust color balance.
When carrying out white balance processing, determine the colour temperature of white balance parameter by the overall red/green of photo
(RGB) contrast ratio determines, and the colour temperature of the subregion of photo often be present and very big difference be present with the colour temperature in other regions
Or the situation that shooting image is solid-color image, the colour temperature of the overall colour temperature and reality of the image so detected have differences, entered
The color meeting distortion of image, causes deteriroation of image quality when row white balance correction.
Therefore, need a kind of technical scheme of white balance correction badly, can accurately determine to carry out white balance school to present image
The colour temperature of timing foundation, white balance treatment effect is improved, improve picture quality.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of method, apparatus and computer-readable storage medium of white balance correction
Matter, it can accurately determine to carry out present image the colour temperature of foundation during white balance correction, improve white balance treatment effect, improve figure
Tablet quality.
What the technical scheme of the embodiment of the present invention was realized in：
On the one hand, there is provided a kind of method of white balance correction, obtain image to be corrected, choose the school of the image to be corrected
Positive region, subregion or Zone Full of the correcting area for the correction chart picture；When the correcting area is treated to be described
During the subregion of correction chart picture, the colour temperature in statistical-reference region, the reference zone is the image to be corrected except described
Region outside correcting area, white balance processing is carried out to the image to be corrected according to the colour temperature of the reference zone；Work as institute
When stating the Zone Full that correcting area is the image to be corrected, environment colour temperature is determined, is treated according to the environment colour temperature to described
Correction chart picture carries out white balance processing.
On the other hand, there is provided realize the white balance correction device of the method for above-mentioned white balance correction, described device includes：Deposit
Reservoir, processor and it is stored in the computer program that can be run on the memory and on the processor, the processor
The computer program is performed, to realize：Image to be corrected is obtained, chooses the correcting area of the image to be corrected, the school
Subregion or Zone Full of the positive region for the correction chart picture；When the part that the correcting area is the image to be corrected
During region, the colour temperature in statistical-reference region, the reference zone is the image to be corrected in addition to the correcting area
Region, white balance processing is carried out to the image to be corrected according to the colour temperature of the reference zone；When the correcting area is institute
When stating the Zone Full of image to be corrected, environment colour temperature is determined, the image to be corrected is carried out according to the environment colour temperature white
Balance Treatment.
On the other hand, there is provided a kind of computer-readable recording medium for realizing the above method.
The method, apparatus and computer-readable recording medium of white balance correction provided in an embodiment of the present invention, can choose
Go out to influence the correcting area of the colour temperature of image, the colour temperature of correcting area is excluded in the calculating process of colour temperature of image is carried out
Fall, further, when calculating the colour temperature of image, when the correcting area of selection is the subregion of image, by image
The reference zone that colour temperature of the correcting area using exterior domain as image calculates, the colour temperature of reference zone is defined as to the color of image
Temperature, when the correcting area of selection is whole region, the colour temperature of image is determined according to current environment colour temperature.Take into account calmly non-pure
Pornographic condition and pure color situation, the colour temperature of present image can be accurately calculated according to specific image, improve white balance treatment effect,
Improve picture quality.
Brief description of the drawings
Fig. 1 is the hardware architecture diagram for realizing each optional mobile terminal of embodiment one of the present invention；
Fig. 2 is the wireless communication system schematic diagram of mobile terminal as shown in Figure 1；
Fig. 3 is the schematic flow sheet of the method for the white balance correction in the embodiment of the present invention one；
Fig. 4 is the schematic flow sheet of the method for white balance correction in the embodiment of the present invention two；
Fig. 5 is the operation chart that correcting area is chosen in the embodiment of the present invention two；
Fig. 6 A and 6B is the effect diagram before and after white balance correction in the embodiment of the present invention two；
Fig. 7 is the schematic flow sheet of the method for white balance correction in the embodiment of the present invention three；
Fig. 8 is the interface schematic diagram that scene information is selected in the embodiment of the present invention three；
Fig. 9 is a kind of structural representation of white balance correction device in the embodiment of the present invention four.
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 follow-up description, the suffix using such as " module ", " part " or " unit " for representing element is only
Be advantageous to the explanation of the present invention, itself there is no a specific meaning.Therefore, " module ", " part " or " unit " can mix
Ground uses.
Terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as mobile phone, flat board
Computer, notebook computer, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable
Media player (Portable Media Player, PMP), guider, wearable device, Intelligent bracelet, pedometer etc. move
Dynamic terminal, and the fixed terminal such as digital 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
Outside element for moving purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Referring to Fig. 1, its hardware architecture diagram for a kind of mobile terminal of each embodiment of the realization 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 block 104, sensor 105, display unit 106, user input unit 107, interface unit
108th, the part 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 less parts,
Either combine some parts or different parts 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, the reception and transmission of signal, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, up data are sent to base station.Generally, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrate
Frequency unit 101 can also be communicated by radio communication with network and other equipment.Above-mentioned radio 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 Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, WCDMA), TD-SCDMA (Time Division-Synchronous Code
Division Multiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, FDD 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, browse webpage and access streaming video etc., it has provided the user wireless broadband internet and accessed.Although Fig. 1 shows
Go out WiFi module 102, but it is understood that, it is simultaneously not belonging to must be configured into for mobile terminal, completely can be according to need
To be omitted in the essential scope for do not change invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or WiFi module 102 it is receiving or
It is sound that the voice data stored in memory 109, which is converted into audio signal and exported,.Moreover, audio output unit 103
The audio output related to the specific function that mobile terminal 100 performs can also be provided (for example, call signal receives sound, disappeared
Breath receives sound etc.).Audio output unit 103 can include loudspeaker, buzzer etc..
A/V input blocks 104 are used to receive audio or video signal.A/V input blocks 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 view data of video obtained in image capture mode by image capture apparatus (such as camera) are carried out
Reason.Picture frame after processing may be displayed on display unit 106.Picture frame after the processing of graphics processor 1041 can be deposited
Storage is transmitted 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 (voice) data after processing 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 and eliminate (or suppression) algorithm to eliminate (or suppression) in reception and send sound
Caused noise or interference during frequency signal.
Mobile terminal 100 also includes at least one sensor 105, such as optical sensor, motion sensor, color temperature sensor
And other sensors.Specifically, optical sensor includes ambient light sensor and proximity transducer, wherein, ambient light sensor
The brightness of display panel 1061 can be adjusted according to the light and shade of ambient light, proximity transducer can be moved in mobile terminal 100
When in one's ear, display panel 1061 and/or backlight are closed.As one kind of motion sensor, accelerometer sensor can detect each
The size of (generally three axles) acceleration, can detect that size and the direction of gravity on direction when static, available for identifying mobile phone
The application (such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating) of posture, Vibration identification correlation function (such as meter step
Device, percussion) etc.；Color temperature sensor is used for the colour temperature for detecting ambient light；The fingerprint sensor that can also configure as mobile phone, pressure pass
Other sensings such as sensor, iris sensor, molecule sensor, gyroscope, barometer, hygrometer, thermometer, infrared ray sensor
Device, it will not be repeated here.
Display unit 106 is used for the information for showing the information inputted by user or being supplied to user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configures display panel 1061.
User input unit 107 can be used for the numeral or character information for receiving input, and produce the use with mobile terminal
The key signals input that family is set and function control is relevant.Specifically, user input unit 107 may include contact panel 1071 with
And other input equipments 1072.Contact panel 1071, also referred to as touch-screen, collect touch operation of the user on or near it
(for example user uses any suitable objects or annex such as finger, stylus on contact panel 1071 or in contact panel 1071
Neighbouring operation), and corresponding attachment means are driven according to formula set in advance.Contact 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 sent of reception processing device 110 and can be performed.In addition, can
To realize contact panel 1071 using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except contact panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
Include but be not limited to physical keyboard, in function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
One or more, do not limit herein specifically.
Further, contact panel 1071 can cover display panel 1061, detect thereon when contact panel 1071 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, contact panel 1071 and display panel
1061 be the part independent as two to realize the input of mobile terminal and output function, but in certain embodiments, can
Input and the output function of mobile terminal are realized so that contact panel 1071 and display panel 1061 is integrated, is not done herein specifically
Limit.
Interface unit 108 is connected the interface that can pass through as at least one external device (ED) with mobile terminal 100.For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for connecting the device 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 whole mobile terminal of connection
Individual part, by running or performing the software program and/or module that are stored in memory 109, and call and be stored in storage
Data in device 109, the various functions and processing data of mobile terminal are performed, 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, application processor mainly handles operating system, user interface and application program etc., and modem processor is main
Handle radio 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) to 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 function such as electricity and power managed.
Although Fig. 1 is not shown, mobile terminal 100 can also will not be repeated here including bluetooth module etc..
For the ease of understanding the embodiment of the present invention, the communications network system being based on below to the mobile terminal of the present invention enters
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
Unite as the LTE system of universal mobile communications technology, the UE that the LTE system includes communicating connection successively (User Equipment, is used
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 here is omitted.
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 UE201 to EPC203 access.
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 between EPC203, there is provided carrying and connection management.HSS2032 is all to manage for providing some registers
Such as the function of attaching position register (not shown) etc, and preserve some and used about service features, data rate etc.
The special information in family.All customer data can be transmitted by SGW2034, and PGW2035 can provide UE 201 IP
Address is distributed and other functions, and PCRF2036 is strategy and the charging control strategic decision-making of business data flow and IP bearing resources
Point, it selects and provided 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., do not limit herein.
Based on above-mentioned mobile terminal hardware configuration and communications network system, each embodiment of the inventive method is proposed.
Embodiment one
Based on foregoing embodiment, the embodiment of the present invention provides a kind of white balance correcting, and this method is applied to terminal,
The function that this method is realized can realize that certain program code can be protected by the processor caller code in terminal
Exist in computer-readable storage medium, it is seen then that the terminal comprises at least processor and storage medium.
Fig. 3 is the schematic flow sheet of the white balance correcting in the embodiment of the present invention one, as shown in figure 3, this method bag
Include：
S301, image to be corrected is obtained, choose the correcting area of the image to be corrected, the correcting area is the school
The subregion of positive image or Zone Full；
Preview image when image to be corrected can take pictures for user, or image during progress image procossing.Work as user
When taking pictures, the image that terminal gathers camera is included on the screen of terminal, to be presented to user when preceding camera gathers
The image arrived, now, the preview image for showing screen display are region to be corrected.When user is carried out at image to the image of storage
During reason, image to be corrected is determined by image selection.
It is different according to above-mentioned specific scene, detailed process difference to be corrected is obtained, when user is taking pictures, acquisition is treated
Correction chart picture is：The image that photographic subjects are gathered by camera obtains preview image.When the image to having stored carries out image
During processing, obtaining image to be corrected is：The image selection operation of user is received, figure is treated by what the image selection operation of user determined
As the image of processing is as image to be corrected.
After obtaining image to be corrected, the correcting area of image to be corrected is chosen, the correcting area of selection can be the portion of image
Subregion, or the Zone Full of image, when the correcting area of selection is the Zone Full of image, it may be determined that figure to be corrected
As being the image close to pure color.Wherein, the operation for choosing the correcting area of image to be corrected can be true according to the selection operation of user
It is fixed, or chosen automatically according to ambient brightness.
Determine that correcting area is specially according to the selection operation of user：When detecting selection operation, the selection behaviour is determined
Selection coordinate corresponding to making, the correcting area is determined according to the selection coordinate.Here, correction zone is determined according to selection coordinate
During domain, the region that coordinate determines can will will be directly selected as region to be corrected, also can be according to the region that selection coordinate determines
Colour temperature determines the colour temperature of correcting area, and the region that the colour temperature in image is consistent with the colour temperature that target area is sat in selection is as correction
Region.
When choosing correcting area automatically according to ambient brightness, the correcting area bag for choosing the image to be corrected
Include：Current environment brightness is detected, determines that exposure value indexes according to the ambient brightness；Measure each pixel of the image to be corrected
Colour temperature, obtain fiducial value compared with the colour temperature of each pixel and the exposure value are indexed；Determine that the fiducial value is more than to set
Determine the correction pixels of threshold value, the correcting area is determined according to the correction pixels.Here, by the detection to ambient brightness come
Determine in image with the different relatively large region of other parts color temperature difference.
When choosing correcting area automatically, determine that the colour temperature of Zone Full is maintained at by the way that the data of image are carried out with analysis
, now, can be using the Zone Full of image as correcting area close to pure color in certain limit.
It should be noted that when correcting area is the subregion of image, correcting area can be an independent region,
Also can be made up of multiple regions being independently distributed.
In actual applications, user can directly select current scene information, when user selects scene information, then give tacit consent to
Current correcting area is the Zone Full of image to be corrected.
S302, when the correcting area be the image to be corrected subregion when, the colour temperature in statistical-reference region, institute
The region in addition to the correcting area that reference zone is the image to be corrected is stated, according to the colour temperature pair of the reference zone
The image to be corrected carries out white balance processing.
When the subregion that correcting area is image to be corrected is determined in S301, count and correction zone is removed in image to be corrected
The colour temperature in other regions beyond domain, here, other regions in image to be corrected in addition to correcting area are defined as referring to
Region.Specifically, the value of R, G, B triple channel of analysis reference zone, is calculated white according to the value of R, G, B triple channel calculated
Balance parameters, white balance processing is completed to the colour temperature of image control image according to white balance parameter.
Here, calculating white balance parameter according to the value of R, G, B triple channel of reference zone can be by gray world method, complete
U.S. bounce technique, colour temperature passage method etc. calculate white balance algorithm and realize that the embodiment of the present invention is not done to specific white balance algorithm to be had
Body limits.
S303, when the correcting area be the image to be corrected Zone Full when, environment colour temperature is determined, according to described
Environment colour temperature carries out white balance processing to the image to be corrected.
When the selection by user in S301 determines that the Zone Full of image is correcting area, or by treating correction chart
The data of picture are analyzed to obtain image and close to pure color determine the Zone Full of image when being correcting area, determine ambient color
Temperature.Here, determine that environment colour temperature may include：Detect current scene information；According to the scene information of setting and the pass of environment colour temperature
System determines environment colour temperature corresponding to the scene information.Wherein, it can be specially the input for detecting user to detect current scene information
Operation or scene selection operation, current scene information is determined according to scene selection operation after the input operation of user, such as：Room
The scene such as interior, outdoor, night, it is determined that after scene, the ring under current scene is determined according to the scene information of the scene of determination
Border colour temperature.
In embodiments of the present invention, current environment colour temperature can be also directly gathered by color temperature sensor.
It is described that white balance processing bag is carried out to the image to be corrected according to the environment colour temperature when it is determined that after environment colour temperature
Include：The corresponding white balance parameter of the environment colour temperature is determined according to the environment colour temperature of setting and the relation of white balance parameter, it is described
White balance parameter includes：R gains, G gains and B gains；The white balance parameter is applied in the image to be corrected, to described
Image to be corrected carries out white balance processing.
When carrying out white balance correction to image before taking pictures, now, the image that the preview interface of terminal is shown is warp
The image crossed after white balance correction.
In actual use, when user is taking pictures, can be implemented when receiving the photographing operation of user by the present invention
The white balance correcting that example provides is handled the image that camera collects, using the storage of treated image as use
Take pictures obtained image in family.Also can be after receiving user and opening camera, the image collected to camera carries out white balance school
Just, when receiving the photographing operation of user, directly show through display screen and stored by the preview screen of white balance correction.
In embodiments of the present invention, the relation of scene information and environment colour temperature, different scene informations pair can be preset
Different environment color temperature values is answered, and presets environment colour temperature and the relation of white balance parameter, here, white balance parameter includes：R
Gain, G gains and B gains.List, the relation and ambient color of database mode storage scenarios information and environment colour temperature can be passed through
Temperature and the relation of white balance parameter.
It should be noted that in embodiments of the present invention, correcting area, and the correcting area determined are determined performing S301
For image to be corrected Zone Full when, can directly perform S303.
Here, white balance correcting provided in an embodiment of the present invention, selects correcting area, will influence the colour temperature of image
Misleading region colour temperature carry out image colour temperature calculating process in exclude, further, calculate image colour temperature
When, when the correcting area of selection is the subregion of image, by color of the correcting area in image using exterior domain as image
The reference zone that temperature calculates, the colour temperature of reference zone is defined as the colour temperature of image, is whole region in the correcting area of selection
When, the colour temperature of image is determined according to current environment colour temperature.Ninsolid color situation and pure color situation are taken into account calmly, can be according to specific
Image accurately calculate the colour temperature of present image, improve white balance treatment effect, improve picture quality.
Embodiment two
Based on foregoing embodiment, the embodiment of the present invention provides a kind of method of white balance correction, and this method is applied to eventually
End, the function that this method is realized can realize that certain program code can by the processor caller code in terminal
To be stored in computer-readable storage medium, it is seen then that the terminal comprises at least processor and storage medium.
S401, image to be corrected is obtained, choose the correcting area of the image to be corrected, the correcting area is the school
The subregion of positive image；
Here, after image to be corrected is got, the correcting area for choosing the correction chart picture can be the choosing according to user
Select operation to determine, also correcting area can be determined according to the ambient brightness of detection.
When according to the selection operation of user to determine correcting area, user is based on image to be corrected and carries out selection operation,
Here, terminal determines selection coordinate corresponding to the selection operation when detecting selection operation；It is true according to the selection coordinate
The fixed correcting area.As shown in figure 5, the image to be corrected of acquisition is shown that on a display screen, user passes through display screen by terminal
Know current image, can intuitively determine the colour temperature situation in image.Terminal passes through when receiving the selection operation of user
Selection operation selection coordinate determines the correcting area being had differences with the colour temperature in other regions of image.The selection operation of reception can
Touch operation for user or the regional choice operation based on the realization of the input controls such as mouse.Wherein, selection coordinate pair can be answered
Region as correcting area, region, the data for treating correction chart picture can also be carried out based on selection coordinate corresponding region
Analysis, determines the colour temperature of base area, and determines region consistent with the colour temperature of base area in image to be corrected, by basic area
Domain, the region consistent with the colour temperature of base area composition correcting area.As shown in figure 5, shown on display interface to be corrected
Image, base area corresponding to the selection coordinate of the selection operation of user as is shown in phantom lines, when to the progress of the data of image
After analysis, determine that the part in the background parts in image except base area is consistent with the colour temperature of base area, basis will be included
The background parts in region are as correcting area.
When correcting area can be determined according to the ambient brightness of detection, specifically：Current environment brightness is detected, according to described
Ambient brightness determines that exposure value indexes；Measure the colour temperature of each pixel of the image to be corrected, by the colour temperature of each pixel with it is described
Exposure value index is compared to obtain fiducial value；Determine that the fiducial value is more than the correction pixels of given threshold, according to the school
Positive pixel determines the correcting area.Such as under outdoor fine day environment, the ambient brightness that detects to big, now expose
Value index (exposure_index) can be very small, and the corresponding one group of camera exposure value of exposure value index, exposure value index is smaller,
Exposure value is smaller, that is, illustrates that current ambient brightness is very high.When smaller in exposure_index, the number of correction chart picture is treated
According to being analyzed, determine that the part color temperature information R channel values in picture are more much larger than channel B value, show the part color temperature information
The colour temperature in corresponding region is overall partially red, in the case of the exposure_index of the part color temperature information and image to be corrected is smaller
The color temperature information of the colder outdoor environment of colour temperature is not consistent, it is determined that region corresponding to the part color temperature information is correcting area.
S402, the colour temperature in statistical-reference region, the reference zone remove the correcting area for the image to be corrected
Outside region, white balance processing is carried out to the image to be corrected according to the colour temperature of the reference zone.
It is determined that after correcting area, the color temperature information of correcting area is one for the color temperature information for calculating image to be corrected
Area's information is misled, now, when calculating the colour temperature of image to be corrected, is calculated according to the reference zone beyond correcting area, high-ranking officers
The color temperature information of positive region is deleted, and is not involved in the normal calculating of white balance algorithm.
The colour temperature of reference zone calculates to be entered according to AWB (Automatic white balance, AWB) algorithm
OK.Wherein, it is exactly to correspond to the yield value that white balance algorithm calculates image RGB triple channels that colour temperature, which calculates, right under different colour temperatures
Answer the value of the RGB triple channels of white object different, white balance algorithm be exactly requirement by the white object under different-colour all
White can be reduced to, i.e. (R=G=B).The white balance algorithm of the colour temperature of reference zone is calculated in the embodiment of the present invention to be included：Ash
Spend world's method, perfect reflection, colour temperature passage method etc..The white balance algorithm of the colour temperature of reference zone is calculated in the embodiment of the present invention
Without limiting.
As shown in figure 6 a and 6b, Fig. 6 A are the image for not carrying out white balance correction, and Fig. 6 B are provided using the embodiment of the present invention
White balance correcting processing after image, can be evident that, due to background warm colour information being added in Fig. 6 A
AWB is calculated, and so as to overall colder color, and in Fig. 6 B when calculating the colour temperature of image to be corrected, the colour temperature of correcting area is not used
Information, only calculates white balance parameter according to the color temperature information of reference zone, and the image overall color after white balance processing is relatively inclined
Warm colour.
In the method for white balance correction provided in an embodiment of the present invention, mode manually or automatically selects correction zone
Domain, wherein, automatically choose correcting area when, according to current ambient brightness determine exposure value index, by the size of colour temperature with
The unmatched region of size of exposure value index is defined as correcting area, realizes accurate determination correcting area, improves white balance
The effect of correction, improve the quality of image.
Embodiment three
Based on foregoing embodiment, the embodiment of the present invention provides a kind of method of white balance correction, and this method is applied to eventually
End, the function that this method is realized can realize that certain program code can by the processor caller code in terminal
To be stored in computer-readable storage medium, it is seen then that the terminal comprises at least processor and storage medium.
Fig. 7 is the schematic flow sheet of the method for the white balance correction in the embodiment of the present invention three, is specifically included：
S701, image to be corrected is obtained, choose the correcting area of the image to be corrected, the correcting area is the school
Positive image Zone Full；
Here, after correction chart picture is obtained, the correcting area for choosing the correction chart picture can be to be grasped according to the selection of user
Determine, can also choose correcting area automatically.
When according to the selection operation of user to determine correcting area, coordinate corresponding to the selection operation of user can be directed to and treat
Correction chart is as whole region.User's selection control for selecting scene information can be also provided on the display page, receive the field of user
Scape selection operation, as shown in figure 8, when user selects scene information, current correcting area can be given tacit consent to for image to be corrected
Zone Full.
When choosing correcting area automatically, can be determined by calculating the data of image, specifically, image to be corrected is divided into
Multiple pieces, each piece of colour temperature is calculated, when it is determined that each piece of colour temperature is less than the threshold value of setting, it is determined that current image to be corrected
For pure color, correcting area for image to be corrected Zone Full, it is necessary to explanation, treat correction chart picture carry out piecemeal when
Wait, the colour temperature of each pixel using a pixel as a block, that is, can be counted.
S702, environment colour temperature is determined, white balance processing is carried out to the image to be corrected according to the environment colour temperature.
When it is determined that the correcting area of image to be corrected is the Zone Full of image to be corrected, region to be corrected is being calculated
When white balance processing parameter is RGB gains, without reference to the color temperature information of image to be corrected, but according to the scene information of setting with
The relation of white balance parameter, the scene information of user's selection determine white balance parameter, wherein, scene information and white balance parameter it
Between relation correspond, different scene informations corresponds to different white balance parameters.
Here, mode that can be as shown in Figure 8, scene information is determined according to the selection of user.Different scenes is corresponding different
Environment colour temperature, such as：Such as indoor 4000k, outdoor 5000k, night scene 2850k, in embodiments of the present invention, it can also pass through color
Temperature sensor gathers environment colour temperature.It is determined that after environment colour temperature, determine to carry out the white balance of white balance correction by environment colour temperature
Parameter, here, the corresponding relation of color temperature value and white balance parameter is also preset, such as, under 2850K colour temperature environment, in vain
RGB triple channels value corresponding to color object is respectively R=180, G=200, B=100 (in general brightness of image scope is 0-255),
It can be seen that R channel components value is apparently higher than channel B component value from data, i.e., white object can present one it is partially red partially warm
Color, white balance is that white (R=G=B) is still presented under different-colour environment in requirement white object, thus can go to calculate
The yield value of triple channel, i.e., R heregain=1.11, Bgain=2, Ggain=1, set environment light is white balance corresponding to 2850k
Parameter is Rgain=1.11, Bgain=2, Ggain=1.
When it is determined that after white balance parameter, white balance parameter being applied in the image to be corrected, treats correction chart as in
The R component of each pixel, G components, B component carry out gain control, correct image to be corrected, complete white balance correction.
Such as：When environment colour temperature is 4000K, the yield value of RGB triple channels corresponding to 4000K ambient lights is pre-set i.e.
(gain values), the white object under 4000K colour temperatures that this gain value makes are presented white (R=G=B).When user selects room
During interior scene, it is determined that environment colour temperature be 4000K, image RGB triple channels will be multiplied by gain values corresponding to 4000K, and image is just
Can correctly it be corrected.
When image to be corrected is pure color, the data of the whole region of its image cause user can not correctly calculate to work as
Preceding colour temperature, in embodiments of the present invention, according to the scene of user's selection or the color temperature value detected by color temperature sensor come really
Surely the white balance parameter of blank level adjustment is carried out, to carry out accurate white balance correction to image, the object gone back in original image is former
The color come, improve picture quality.
Example IV
Based on foregoing embodiment of the method, the embodiment of the present invention provides a kind of white balance correction device, as shown in Figure 10, institute
Stating device includes：Memory 901, processor 902 and it is stored in the calculating that can be run on memory 902 and on processor 901
Machine program, processor 902 perform the computer program, to realize：
Image to be corrected is obtained, chooses the correcting area of the image to be corrected, the correcting area is the correction chart
The subregion of picture or Zone Full；When the correcting area is the subregion of the image to be corrected, statistical-reference area
The colour temperature in domain, the reference zone is the region in addition to the correcting area of the image to be corrected, according to the reference
The colour temperature in region carries out white balance processing to the image to be corrected；When the whole that the correcting area is the image to be corrected
During region, environment colour temperature is determined, white balance processing is carried out to the image to be corrected according to the environment colour temperature.
When processor 902 performs the computer program, the correcting area bag for choosing the image to be corrected is realized
Include：
When detecting selection operation, selection coordinate corresponding to the selection operation is determined, is determined according to the selection coordinate
The correcting area；Or
Current environment brightness is detected, determines that exposure value indexes according to the ambient brightness, measures the image to be corrected
The colour temperature of each pixel, fiducial value is obtained compared with the colour temperature of each pixel is indexed with the exposure value, determines the fiducial value
More than the correction pixels of given threshold, the correcting area is determined according to the correction pixels.
When processor 902 performs the computer program, realize that the determination ambient color thermometer bulb includes：Detect current scene letter
Breath；The corresponding environment colour temperature of the scene information is determined according to the scene information of setting and the relation of environment colour temperature.
When processor 902 performs the computer program, realize it is described according to the environment colour temperature to the figure to be corrected
Include as carrying out white balance processing：Determine that the environment colour temperature is corresponding with the relation of white balance parameter according to the environment colour temperature of setting
White balance parameter, the white balance parameter includes：R gains, G gains and B gains；It will be treated described in white balance parameter application
In correction chart picture, white balance processing is carried out to the image to be corrected.
Embodiment five
To realize the above method, the embodiment of the present invention also provides a kind of computer-readable recording medium, and the computer can
Read to be stored with computer program in storage medium, the computer program is realized when being executed by processor：Image to be corrected is obtained,
Choose the correcting area of the image to be corrected, subregion or Zone Full of the correcting area for the correction chart picture；
When the correcting area is the subregion of the image to be corrected, the colour temperature in statistical-reference region, the reference zone is
The region in addition to the correcting area of the image to be corrected, according to the colour temperature of the reference zone to the figure to be corrected
As carrying out white balance processing；When the correcting area is the Zone Full of the image to be corrected, environment colour temperature is determined, according to
The environment colour temperature carries out white balance processing to the image to be corrected.
The computer program realizes that the correcting area for choosing the image to be corrected includes when being executed by processor：
When detecting selection operation, selection coordinate corresponding to the selection operation is determined, the correction is determined according to the selection coordinate
Region；Or detection current environment brightness, determine that exposure value indexes according to the ambient brightness, measure each of the image to be corrected
The colour temperature of pixel, fiducial value is obtained compared with the colour temperature of each pixel is indexed with the exposure value, determines that the fiducial value is big
In the correction pixels of given threshold, the correcting area is determined according to the correction pixels.
The computer program realizes that the determination ambient color thermometer bulb includes when being executed by processor：Detect current scene letter
Breath；The corresponding environment colour temperature of the scene information is determined according to the scene information of setting and the relation of environment colour temperature.
The computer program realized when being executed by processor it is described according to the environment colour temperature to the image to be corrected
Carrying out white balance processing includes：Determine that the environment colour temperature is corresponding with the relation of white balance parameter according to the environment colour temperature of setting
White balance parameter, the white balance parameter include：R gains, G gains and B gains；School will be treated described in white balance parameter application
In positive image, white balance processing is carried out to the image to be corrected.
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 key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key 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 is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal (can be mobile phone, computer, service
Device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (10)
1. a kind of white balance correcting, it is characterised in that methods described includes：
Obtain image to be corrected, choose the correcting area of the image to be corrected, the correcting area be the correction chart as
Subregion or Zone Full；
When the correcting area is the subregion of the image to be corrected, the colour temperature in statistical-reference region, the reference area
Domain is the region in addition to the correcting area of the image to be corrected, and school is treated to described according to the colour temperature of the reference zone
Positive image carries out white balance processing；
When the correcting area is the Zone Full of the image to be corrected, environment colour temperature is determined, according to the environment colour temperature
White balance processing is carried out to the image to be corrected.
2. according to the method for claim 1, it is characterised in that the correcting area bag for choosing the image to be corrected
Include：
When detecting selection operation, selection coordinate corresponding to the selection operation is determined；
The correcting area is determined according to the selection coordinate.
3. according to the method for claim 1, it is characterised in that the correcting area bag for choosing the image to be corrected
Include：
Current environment brightness is detected, determines that exposure value indexes according to the ambient brightness；
The colour temperature of each pixel of the image to be corrected is measured, compared with the colour temperature of each pixel is indexed with the exposure value
To fiducial value；
Determine that the fiducial value is more than the correction pixels of given threshold, the correcting area is determined according to the correction pixels.
4. according to the method for claim 1, it is characterised in that the determination ambient color thermometer bulb includes：
Detect current scene information；
The corresponding environment colour temperature of the scene information is determined according to the scene information of setting and the relation of environment colour temperature.
5. according to the method for claim 1, it is characterised in that it is described according to the environment colour temperature to the image to be corrected
Carrying out white balance processing includes：
The corresponding white balance parameter of the environment colour temperature is determined according to the environment colour temperature of setting and the relation of white balance parameter, it is described
White balance parameter includes：R gains, G gains and B gains；
The white balance parameter is applied in the image to be corrected, white balance processing is carried out to the image to be corrected.
6. a kind of white balance correction device, it is characterised in that described device includes：Memory, processor and it is stored in described deposit
On reservoir and the computer program that can run on the processor, computer program described in the computing device, to realize：
Obtain image to be corrected, choose the correcting area of the image to be corrected, the correcting area be the correction chart as
Subregion or Zone Full；
When the correcting area is the subregion of the image to be corrected, the colour temperature in statistical-reference region, the reference area
Domain is the region in addition to the correcting area of the image to be corrected, and school is treated to described according to the colour temperature of the reference zone
Positive image carries out white balance processing；
When the correcting area is the Zone Full of the image to be corrected, environment colour temperature is determined, according to the environment colour temperature
White balance processing is carried out to the image to be corrected.
7. device according to claim 6, it is characterised in that described in the computing device during computer program, realize
The correcting area for choosing the image to be corrected includes：
When detecting selection operation, selection coordinate corresponding to the selection operation is determined, according to determining the selection coordinate
Correcting area；Or
Current environment brightness is detected, determines that exposure value indexes according to the ambient brightness, measures each picture of the image to be corrected
The colour temperature of element, fiducial value is obtained compared with the colour temperature of each pixel is indexed with the exposure value, determines that the fiducial value is more than
The correction pixels of given threshold, the correcting area is determined according to the correction pixels.
8. device according to claim 6, it is characterised in that described in the computing device during computer program, realize
The determination ambient color thermometer bulb includes：
Detect current scene information；
The corresponding environment colour temperature of the scene information is determined according to the scene information of setting and the relation of environment colour temperature.
9. device according to claim 6, it is characterised in that described in the computing device during computer program, realize
It is described that the image progress white balance processing to be corrected is included according to the environment colour temperature：
The corresponding white balance parameter of the environment colour temperature is determined according to the environment colour temperature of setting and the relation of white balance parameter, it is described
White balance parameter includes：R gains, G gains and B gains；
The white balance parameter is applied in the image to be corrected, white balance processing is carried out to the image to be corrected.
10. a kind of computer-readable recording medium, it is characterised in that be stored with computer on the computer-readable recording medium
Program, the white balance correction side as any one of claim 1 to 5 is realized when the computer program is executed by processor
Method.
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