CN107465881A - A kind of dual camera focusing method, mobile terminal and computer-readable recording medium - Google Patents
A kind of dual camera focusing method, mobile terminal and computer-readable recording medium Download PDFInfo
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- CN107465881A CN107465881A CN201710913729.1A CN201710913729A CN107465881A CN 107465881 A CN107465881 A CN 107465881A CN 201710913729 A CN201710913729 A CN 201710913729A CN 107465881 A CN107465881 A CN 107465881A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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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
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
Abstract
The invention discloses a kind of dual camera focusing method, obtain and calculate current environment brightness and color gamut value；Judge whether the brightness and color gamut value are more than preset value；In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；In the case where judged result is no, enables second camera and carry out contrast focusing.The invention also discloses a kind of mobile terminal and computer-readable recording medium, solves the problems, such as camera focusing underaction in correlation technique, determine to enable the camera of contrast focusing by brightness and color gamut value, realize flexible focusing, improve Consumer's Experience.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of dual camera focusing method, mobile terminal and
Computer-readable recording medium.
Background technology
At present, when taking pictures, video camera typically all can first find a focusing, and the searching process of focusing is all base
In common FV principles, that is, the focusing that a width shooting image is found above is initial position, judges the opening position
Definition, then using the position as starting point, increase △ x units every time to some direction along a curve, look for pair
Focus, if on some direction, after one section of ascendant trend of passing by is reached at x1, continuous three opening positions are all judged as declining
Trend, then initial point is returned to, looks for focusing towards opposite direction in the same manner, until finding a model substantially
Enclose, the curve ranges obtained as coarse scan, then △ x will be reduced in the curve ranges that coarse scan obtains to enter in the same way
The trickle focusing of row, until finding definition highest point, the focusing as current picture to be captured.
And for dual camera, focusing is all to need to go to focus respectively, therefore, right for single camera
The burnt required time is more long, is unfavorable for quickly taking pictures, catches excellent moment, the use to user cause it is certain not
Just property.
For the problem of camera focusing underaction, not yet proposing solution at present in correlation technique.
The content of the invention
It is a primary object of the present invention to propose a kind of dual camera focusing method, mobile terminal and computer-readable deposit
Storage media, it is intended to solve the problems, such as camera focusing underaction in correlation technique.
To achieve the above object, the embodiment of the present invention proposes a kind of dual camera focusing method, including：
Obtain and calculate current environment brightness and color gamut value；
Judge whether the brightness and color gamut value are more than preset value；
In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；
In the case where judged result is no, enables second camera and carry out contrast focusing.
Optionally, first camera is colour imagery shot, and the second camera is black and white camera.
Optionally, judge whether the brightness and color gamut value include more than preset value：
Initial data YUV is obtained by first camera and the second camera, wherein, Y is the brightness of image,
U, V is the colourity of image；
Judge whether the value of the YUV is more than preset value.
Optionally, enabling the progress contrast focusing of the first camera includes：
Judge whether viewfinder image color is solid-color image；
In the case where the judgment result is yes, contrast focusing is carried out by first camera；
In the case where judged result is no, passes through first camera and carry out phase focusing.
Optionally, judge whether viewfinder image color is that solid-color image includes：
Obtain one block of image in focusing area；
Judge that the focusing area uses face weight regions focusing mode or central area focusing mode；
When the focusing area uses face weight regions focusing central area focusing mode, it is determined that the image of acquisition is
The ninsolid color image；
When the focusing area using central area focusing mode, judge whether the focusing area is solid-color image.
Optionally, when the focusing area using central area focusing mode, judge whether the focusing area is pure color
Image includes：
The accounting of similar pixel in N*N pixel rectangle focusing areas is counted, wherein, the similar pixel is pixel A and picture
Difference is less than the first preset value between plain B, and N is the integer between 300 to 600；
Judge whether the accounting of the similar pixel is more than the first threshold pre-set；
In the case where the judgment result is yes, it is solid-color image to determine the focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, when the focusing area using central area focusing mode, judge whether the focusing area is pure color
Image includes：
Obtain the pixel value P in N*N pixel rectangle focusing areas；
N*N matrixes new obtained by calculating are rounded as log2 (P), wherein, the value each put in the new N*N matrixes is
Integer in 0-8；
The number of each numeral in 0-8 is counted respectively；
Judge whether a digital number is more than the Second Threshold pre-set；
In the case where the judgment result is yes, it is solid-color image to determine focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, when the focusing area using central area focusing mode, judge whether the focusing area is pure color
Image includes：
N*N pixel rectangle focusing areas are divided into 9 1/3N*1/3N adjacency matrix；
Contrast the similar matrix that the adjacency matrix obtains the adjacency matrix, wherein, the similar matrix be matrix it
Between registration be more than the second preset value；
Judge whether the number of the similar matrix is more than the 3rd threshold value pre-set；
In the case where the judgment result is yes, it is solid-color image to determine focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Another aspect according to embodiments of the present invention, additionally provides a kind of mobile terminal, and the mobile terminal includes：First
Camera, second camera, processor, memory and communication bus, wherein,
First camera and the second camera, it is respectively used to focus to the image of shooting；
The communication bus, for realizing the connection communication between the processor and the memory；
The processor, for performing the dual camera stored in memory focusing program, to realize following steps：
Obtain and calculate current environment brightness and color gamut value；
Judge whether the brightness and color gamut value are more than preset value；
In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；
In the case where judged result is no, enables second camera and carry out contrast focusing.
Optionally, first camera is colour imagery shot, and the second camera is black and white camera.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Initial data YUV is obtained by first camera and the second camera, wherein, Y is the brightness of image,
U, V is the colourity of image；
Judge whether the value of the YUV is more than preset value.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Judge whether viewfinder image color is solid-color image；
In the case where the judgment result is yes, contrast focusing is carried out by first camera；
In the case where judged result is no, passes through first camera and carry out phase focusing.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Obtain one block of image in focusing area；
Judge that the focusing area uses face weight regions focusing mode or central area focusing mode；
When the focusing area uses face weight regions focusing central area focusing mode, it is determined that the image of acquisition is
The ninsolid color image；
When the focusing area using central area focusing mode, judge whether the focusing area is solid-color image.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
The accounting of similar pixel in N*N pixel rectangle focusing areas is counted, wherein, the similar pixel is pixel A and picture
Difference is less than the first preset value between plain B, and N is the integer between 300 to 600；
Judge whether the accounting of the similar pixel is more than the first threshold pre-set；
In the case where the judgment result is yes, it is solid-color image to determine the focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Obtain the pixel value P in N*N pixel rectangle focusing areas；
N*N matrixes new obtained by calculating are rounded as log2 (P), wherein, the value each put in the new N*N matrixes is
Integer in 0-8；
The number of each numeral in 0-8 is counted respectively；
Judge whether a digital number is more than the Second Threshold pre-set；
In the case where the judgment result is yes, it is solid-color image to determine focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
N*N pixel rectangle focusing areas are divided into 9 1/3N*1/3N adjacency matrix；
Contrast the similar matrix that the adjacency matrix obtains the adjacency matrix, wherein, the similar matrix be matrix it
Between registration be more than the second preset value；
Judge whether the number of the similar matrix is more than the 3rd threshold value pre-set；
In the case where the judgment result is yes, it is solid-color image to determine focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Another aspect according to embodiments of the present invention, additionally provide a kind of computer-readable recording medium, the computer
Readable storage medium storing program for executing is stored with one or more program, and one or more of programs can be by one or more processor
Perform, the step of to realize above-mentioned dual camera focusing method.
By the present invention, obtain and calculate current environment brightness and color gamut value；Judge whether the brightness and color gamut value are big
In preset value；In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；In the feelings that judged result is no
Under condition, enable second camera and carry out contrast focusing, solve the problems, such as camera focusing underaction in correlation technique, pass through
Brightness and color gamut value determine to enable the camera of contrast focusing, realize flexible focusing, improve Consumer's Experience.
Brief description of the drawings
Fig. 1 is the hardware architecture diagram for realizing each one optional mobile terminal of embodiment 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 flow chart of dual camera focusing method according to embodiments of the present invention；
Fig. 4 is the schematic diagram one of dual camera focusing according to embodiments of the present invention；
Fig. 5 is the schematic diagram two of dual camera focusing according to embodiments of the present invention；
Fig. 6 is the block diagram of mobile terminal according to embodiments of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
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 and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity transducer, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity transducer 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 axles) size of acceleration, size and the direction of gravity are can detect that when static, the application available for identification mobile phone posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The fingerprint sensor that can also configure as mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer,
The other sensors such as hygrometer, thermometer, infrared ray sensor, 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 whole 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 1
Based on above-mentioned mobile terminal, the embodiments of the invention provide a kind of dual camera focusing method, Fig. 3 is according to this
The flow chart of the dual camera focusing method of inventive embodiments, as shown in figure 3, this method comprises the following steps：
Step S301, obtain and calculate current environment brightness and color gamut value；
Step S302, judges whether the brightness and color gamut value are more than preset value；
Step S303, in the case where the judgment result is yes, enable the first camera and carry out contrast focusing；
Step S304, in the case where judged result is no, enables second camera and carry out contrast focusing.
By above-mentioned steps, obtain and calculate current environment brightness and color gamut value；Judge whether are the brightness and color gamut value
More than preset value；In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；It is no in judged result
In the case of, enable second camera and carry out contrast focusing, solve the problems, such as camera focusing underaction in correlation technique, lead to
Cross brightness and color gamut value determines to enable the camera of contrast focusing, realize flexible focusing, improve Consumer's Experience.
Optionally, first camera is colour imagery shot, and the second camera is black and white camera.
Optionally, judge whether the brightness and color gamut value include more than preset value：Pass through first camera and institute
State second camera and obtain initial data YUV, wherein, Y is the brightness of image, and U, V are the colourity of image；Judge the YUV's
Whether value is more than preset value.
YUV is mainly used in optimizing the transmission of colour-video signal, makes its compatible old-fashioned black-and-white television backward.With rgb video
Signal transmission compares, its biggest advantage be only need to take few frequency range (RGB require three independent vision signals simultaneously
Transmission).Wherein " Y " represents lightness (Luminance or Luma), that is, grey decision-making；And what " U " and " V " was represented is then color
Spend (Chrominance or Chroma), effect is to describe colors of image and saturation degree, the color for specified pixel." brightness "
Established through RGB input signals, method is that the specific part of rgb signal is superimposed together." colourity " then defines
Two aspects of color-tone and saturation degree, represented respectively with Cr and Cb.Wherein, Cr reflects RGB input signals red
Difference between part and rgb signal brightness value.And Cb reflections is RGB input signals blue portion and rgb signal brightness value
Between difference.
Importance using YUV color spaces be it luminance signal Y and carrier chrominance signal U, V be separation.If only Y
Component of signal is without U, V component, then the image so represented is exactly black and white gray level image.
Optionally, enabling the progress contrast focusing of the first camera includes：Judge whether viewfinder image color is solid-color image；
In the case where the judgment result is yes, contrast focusing is carried out by first camera；In the case where judged result is no,
Phase focusing is carried out by first camera.
Optionally, judge whether viewfinder image color is that solid-color image includes：Obtain one block of image in focusing area；Sentence
The focusing area that breaks uses face weight regions focusing mode or central area focusing mode；When the focusing area
Use face weight regions focusing central area focusing mode, it is determined that the image of acquisition is the ninsolid color image；When described
Focusing area judges whether the focusing area is solid-color image using central area focusing mode.
Optionally, when the focusing area using central area focusing mode, judge whether the focusing area is pure color
Image includes：The accounting of similar pixel in N*N pixel rectangle focusing areas is counted, wherein, the similar pixel is pixel A and picture
Difference is less than the first preset value between plain B, and N is the integer between 300 to 600；Judge whether the accounting of the similar pixel is more than
The first threshold pre-set；In the case where the judgment result is yes, it is solid-color image to determine the focusing area；Judging to tie
In the case that fruit is no, it is ninsolid color image to determine the focusing area.
Optionally, when the focusing area using central area focusing mode, judge whether the focusing area is pure color
Image includes：Obtain the pixel value P in N*N pixel rectangle focusing areas；N*N squares new obtained by calculating are rounded as log2 (P)
Battle array, wherein, the value each put in the new N*N matrixes is integer in 0-8；The number of each numeral in 0-8 is counted respectively；Sentence
Whether a disconnected digital number is more than the Second Threshold pre-set；In the case where the judgment result is yes, it is determined that focusing area
Domain is solid-color image；In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, when the focusing area using central area focusing mode, judge whether the focusing area is pure color
Image includes：N*N pixel rectangle focusing areas are divided into 9 1/3N*1/3N adjacency matrix；The adjacency matrix is contrasted to obtain
The similar matrix of the adjacency matrix, wherein, registration of the similar matrix between matrix is more than the second preset value；Judge
Whether the number of the similar matrix is more than the 3rd threshold value pre-set；In the case where the judgment result is yes, it is determined that focusing
Region is solid-color image；In the case where judged result is no, it is ninsolid color image to determine the focusing area.
In the embodiment of the present invention, the focusing of dual camera, obtain and calculate current environment brightness and color gamut value, described in judgement
Whether brightness and color gamut value are more than preset value, if so, then enabling the first camera carries out contrast focusing；Otherwise, second is enabled to take the photograph
As head carries out contrast focusing.
1. brightness is less than threshold value S1, directly using the contrast focusing mode of black and white camera；
2. brightness is higher than threshold value S1, whether viewfinder image color is judged close to pure color picture, if using colour imagery shot
Contrast focusing, if otherwise using colour imagery shot phase focus.
The raw image data YUV of the camera bottom, wherein Y-signal are exactly the monochrome information for representing the image, Y-signal
It is then dark situation when average value is less than predetermined threshold value Y0, is then bright ring border higher than predetermined threshold value Y0.Y0 can adjust modification
Parameter, it is defaulted as 32.The average luminance information of (Y value is between 0-255) entire image is to obtain simultaneously the most fast time
Judge, so as to which just intelligent selection judges whether to take the photograph using the master of colour or is taken the photograph using the pair of black and white.
Image color whether be solid color regions judgment mode, take one block of image of very little of focusing area.Focusing area one
As using central area focusing mode or face weight regions focusing mode, wherein face weight regions focusing the direct right and wrong of mode
Solid-color image is focused using the phase of colour imagery shot, and central area focusing mode is then the general 300*300 in image middle
Pixel square region (can also other N*N picture element matrixs, the N values are 300-600 in general mobile phone, can artificially be adjusted).
The area image is taken, using following more than three kinds of judgment mode：
Mode 1：Count in the 300*300 picture element matrixs region accounting of similar pixel, the judgment mode of similar pixel, as
Difference then regards as similar pixel less than threshold value between plain A and pixel B.Similar pixel accounting is higher than 50% it is considered that focusing
Region is pure color scenery.(this 50%, can taking human as be adjusted to 60% so that other values).
Mode 2：By 300*300 picture element matrix pixel values in regions P (each P values 0-255 coding), log2 (P) is rounded
Number calculates the new 300*300 matrixes (value each put in matrix integer in 0-8) of gained, counts each numerals of 0-8 respectively
Number, the number of one of numeral then can consider that focusing area is pure color scenery when being more than 300*300*50%.(should
50%, can taking human as be adjusted to 60% so that other values).
Mode 3：300*300 is divided into 9 100*100 adjacency matrix, this nine minor matrixs is contrasted, is weighed between minor matrix
It is right be higher than 40% assert two matrixes it is similar, calculate the maximum times of similar matrix, maximum times can then recognize when unnecessary 4 times
It is pure color scenery for focusing area.(this 4 times, can taking human as be adjusted to 5 times or even other values).
In the embodiment of the present invention, contrast focusing is focusing mode used in current most of smart mobile phones, this right
Under burnt pattern, when being directed at subject, the motor in camera lens module will drive eyeglass to be moved from bottom to top, at this
During, element sensor will carry out the complete detection on depth direction to whole scene domain, and continue Record Comparison degree
Etc. contrast numerical value.After finding out contrast maximum position, the position can then be come back to by moving to the eyeglass at top, complete final pair
It is burnt.Then it is the final clearly mistake of " drawing bellows " formula by obscuring clearly again to fuzzy when being reflected on user mobile phone screen
Journey.
The embodiment of the present invention, contrast focusing can be accomplished by the following way, including：
Step S1, Fig. 4 are the schematic diagrames one of dual camera focusing according to embodiments of the present invention, as shown in figure 4, passing through the
One camera, second camera obtain first group of focusing, and every group of focusing includes previous focusing and latter focusing.
Before this step, the focusing of previous image, the starting pair using the focusing as present image are first obtained
Focus.
In this step, previous focusing is obtained by the first camera, latter focusing is obtained by second camera, often
Group focusing includes previous focusing and latter focusing.
Step S2, judges whether the focus value of latter focusing is more than the focus value of previous focusing.
In this step, the size of the focus value of more latter focusing and the focus value of previous focusing.After detecting
The focus value that the focus value of one focusing is more than previous focusing is continued through under the first camera and second camera acquisition
One group of focusing, and judge whether latter focusing is more than the focus value of previous focusing；
The size of the focus value of the focus value of more latter focusing and previous focusing, circulation perform obtain focusing and
The step of judging the size of the focus value of latter focusing and the focus value of previous focusing.
In the present invention, focus value is bigger, represents that the image of the focusing is more clear；Focus value is smaller, represents the focusing
Image it is more unintelligible.
In this step, when the focus value of latter focusing is more than the focus value of previous focusing, continues through first and take the photograph
As head next group of focusing of acquisition, it is further continued for judging the focus value of the latter focusing in next group of focusing and previous focusing
Focus value size.
Step S3, a certain focusing before the focus value for finding continuous three focusings is less than three focusings
During focus value, image taking is carried out using a certain focusing as the first focusing.
Fig. 5 is the schematic diagram two of dual camera focusing according to embodiments of the present invention, as shown in figure 5, passing through the first shooting
Head, second camera obtain second group of focusing, and every group of focusing include previous focusing and latter focusing, continue through the
One camera obtains the focus value of previous focusing, and the focus value of latter focusing is obtained by second camera, as it was previously stated,
Until find continuous three focusings focus value be less than three focusings before a certain focusing focus value when, by institute
State a certain focusing and carry out image taking as the first focusing.Wherein, the previous focusing and the latter focusing phase
Adjacent and the first step-length of interval.
Phase is focused, and compared to the phase focusing on digital single-lens reflex camera, the phase focusing on mobile phone is then directly will be certainly
Dynamic focusing sensor both takes out the relative paired pixel in left and right together with being directly integrated with element sensor from element sensor
Point, the detection of the information such as light-inletting quantity is carried out to the object in scene respectively, will by comparing the correlation situation of the left and right sides
Accurate focusing is found out rapidly, and eyeglass disposably will be pushed to relevant position and complete focusing by motor between mirror afterwards.
Embodiment 2
Another aspect according to embodiments of the present invention, additionally provides a kind of mobile terminal, and Fig. 6 is according to embodiments of the present invention
Mobile terminal block diagram, as shown in fig. 6, the mobile terminal includes：First camera, second camera, processor, storage
Device and communication bus, wherein,
First camera and the second camera, it is respectively used to focus to the image of shooting；
The communication bus, for realizing the connection communication between the processor and the memory；
The processor, for performing the dual camera stored in memory focusing program, to realize following steps：
Obtain and calculate current environment brightness and color gamut value；
Judge whether the brightness and color gamut value are more than preset value；
In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；
In the case where judged result is no, enables second camera and carry out contrast focusing.
Optionally, first camera is colour imagery shot, and the second camera is black and white camera.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Initial data YUV is obtained by first camera and the second camera, wherein, Y is the brightness of image,
U, V is the colourity of image；
Judge whether the value of the YUV is more than preset value.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Judge whether viewfinder image color is solid-color image；
In the case where the judgment result is yes, contrast focusing is carried out by first camera；
In the case where judged result is no, passes through first camera and carry out phase focusing.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Obtain one block of image in focusing area；
Judge that the focusing area uses face weight regions focusing mode or central area focusing mode；
When the focusing area uses face weight regions focusing central area focusing mode, it is determined that the image of acquisition is
The ninsolid color image；
When the focusing area using central area focusing mode, judge whether the focusing area is solid-color image.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
The accounting of similar pixel in N*N pixel rectangle focusing areas is counted, wherein, the similar pixel is pixel A and picture
Difference is less than the first preset value between plain B, and N is the integer between 300 to 600；
Judge whether the accounting of the similar pixel is more than the first threshold pre-set；
In the case where the judgment result is yes, it is solid-color image to determine the focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
Obtain the pixel value P in N*N pixel rectangle focusing areas；
N*N matrixes new obtained by calculating are rounded as log2 (P), wherein, the value each put in the new N*N matrixes is
Integer in 0-8；
The number of each numeral in 0-8 is counted respectively；
Judge whether a digital number is more than the Second Threshold pre-set；
In the case where the judgment result is yes, it is solid-color image to determine focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Optionally, the processor is additionally operable to perform dual camera focusing program, to realize following steps：
N*N pixel rectangle focusing areas are divided into 9 1/3N*1/3N adjacency matrix；
Contrast the similar matrix that the adjacency matrix obtains the adjacency matrix, wherein, the similar matrix be matrix it
Between registration be more than the second preset value；
Judge whether the number of the similar matrix is more than the 3rd threshold value pre-set；
In the case where the judgment result is yes, it is solid-color image to determine focusing area；
In the case where judged result is no, it is ninsolid color image to determine the focusing area.
Embodiment 3
Another aspect according to embodiments of the present invention, additionally provide a kind of computer-readable recording medium, the computer
Readable storage medium storing program for executing is stored with one or more program, and one or more of programs can be by one or more processor
Perform, to realize the following steps of above-mentioned dual camera focusing method：
S11, obtain and calculate current environment brightness and color gamut value；
S12, judges whether the brightness and color gamut value are more than preset value；
S13, in the case where the judgment result is yes, enable the first camera and carry out contrast focusing；
S14, in the case where judged result is no, enables second camera and carry out contrast focusing.
The embodiment of the present invention, obtain and calculate current environment brightness and color gamut value；Judge whether are the brightness and color gamut value
More than preset value；In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；It is no in judged result
In the case of, enable second camera and carry out contrast focusing, solve the problems, such as camera focusing underaction in correlation technique, lead to
Cross brightness and color gamut value determines to enable the camera of contrast focusing, realize flexible focusing, improve Consumer's Experience.
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)
- A kind of 1. dual camera focusing method, it is characterised in that including：Obtain and calculate current environment brightness and color gamut value；Judge whether the brightness and color gamut value are more than preset value；In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；In the case where judged result is no, enables second camera and carry out contrast focusing.
- 2. according to the method for claim 1, it is characterised in that first camera is colour imagery shot, described second Camera is black and white camera.
- 3. according to the method for claim 2, it is characterised in that judge whether the brightness and color gamut value are more than preset value bag Include：Initial data YUV is obtained by first camera and the second camera, wherein, Y is the brightness of image, U, V For the colourity of image；Judge whether the value of the YUV is more than preset value.
- 4. according to the method for claim 2, it is characterised in that enabling the progress contrast focusing of the first camera includes：Judge whether viewfinder image color is solid-color image；In the case where the judgment result is yes, contrast focusing is carried out by first camera；In the case where judged result is no, passes through first camera and carry out phase focusing.
- 5. according to the method for claim 4, it is characterised in that judge whether viewfinder image color is that solid-color image includes：Obtain one block of image in focusing area；Judge that the focusing area uses face weight regions focusing mode or central area focusing mode；When the focusing area uses face weight regions focusing central area focusing mode, it is determined that the image of acquisition is described Ninsolid color image；When the focusing area using central area focusing mode, judge whether the focusing area is solid-color image.
- 6. according to the method for claim 5, it is characterised in that when the focusing area using central area focusing mode, Judge whether the focusing area is that solid-color image includes：Count the accounting of similar pixel in N*N pixel rectangle focusing areas, wherein, the similar pixel for pixel A and pixel B it Between difference be less than the first preset value, N is the integer between 300 to 600；Judge whether the accounting of the similar pixel is more than the first threshold pre-set；In the case where the judgment result is yes, it is solid-color image to determine the focusing area；In the case where judged result is no, it is ninsolid color image to determine the focusing area.
- 7. according to the method for claim 5, it is characterised in that when the focusing area using central area focusing mode, Judge whether the focusing area is that solid-color image includes：Obtain the pixel value P in N*N pixel rectangle focusing areas；N*N matrixes new obtained by calculating are rounded as log2 (P), wherein, the value each put in the new N*N matrixes is 0-8 Interior integer；The number of each numeral in 0-8 is counted respectively；Judge whether a digital number is more than the Second Threshold pre-set；In the case where the judgment result is yes, it is solid-color image to determine focusing area；In the case where judged result is no, it is ninsolid color image to determine the focusing area.
- 8. according to the method for claim 5, it is characterised in that when the focusing area using central area focusing mode, Judge whether the focusing area is that solid-color image includes：N*N pixel rectangle focusing areas are divided into 9 1/3N*1/3N adjacency matrix；The similar matrix that the adjacency matrix obtains the adjacency matrix is contrasted, wherein, the similar matrix is between matrix Registration is more than the second preset value；Judge whether the number of the similar matrix is more than the 3rd threshold value pre-set；In the case where the judgment result is yes, it is solid-color image to determine focusing area；In the case where judged result is no, it is ninsolid color image to determine the focusing area.
- 9. a kind of mobile terminal, it is characterised in that the mobile terminal includes：First camera, second camera, processor, Memory and communication bus, wherein,First camera and the second camera, it is respectively used to focus to the image of shooting；The communication bus, for realizing the connection communication between the processor and the memory；The processor, for performing the dual camera stored in memory focusing program, to realize following steps：Obtain and calculate current environment brightness and color gamut value；Judge whether the brightness and color gamut value are more than preset value；In the case where the judgment result is yes, enable the first camera and carry out contrast focusing；In the case where judged result is no, enables second camera and carry out contrast focusing.
- A kind of 10. computer-readable recording medium, it is characterised in that the computer-readable recording medium storage have one or Multiple programs, one or more of programs can be appointed by one or more computing device with realizing in claim 1-8 The step of one dual camera focusing method.
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