CN107343140A - A kind of image processing method and mobile terminal - Google Patents
A kind of image processing method and mobile terminal Download PDFInfo
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- CN107343140A CN107343140A CN201710449440.9A CN201710449440A CN107343140A CN 107343140 A CN107343140 A CN 107343140A CN 201710449440 A CN201710449440 A CN 201710449440A CN 107343140 A CN107343140 A CN 107343140A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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Abstract
The invention discloses a kind of image processing method, carries out light-metering to the first coordinate points in selected viewfinder window by the module A of dual camera, obtains the exposure value of image by hind computation, obtain preview image 1；Light-metering is carried out to the second coordinate points in the selected viewfinder window by the module B of dual camera, the exposure value of image is obtained by hind computation, obtains preview image 2；Image 1 is generated according to the preview image 1, image 2 is generated according to the preview image 2；Synthesis processing is carried out to image according to described image 1 and described image 2.The invention also discloses a kind of image procossing mobile terminal, solves the problems, such as the difficult image for synthesizing an exposure equilibrium in correlation technique, pass through more accurately image data acquiring, improve the ability of the acquisition for mobile terminal exposure equilibrium figures picture particularly under the conditions of big light ratio, so as to obtain a relatively high image of dynamic range, the practicality and interest of shooting are lifted, then lifts Consumer's Experience.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of image processing method and mobile terminal.
Background technology
With the development of internet and the popularization of terminal, the customer group of terminal is increasing, while also software is proposed
More intelligence, the demand of hommization.
In existing technology, terminal in fact, although by user as a game machine or television set, it is also possible to one
Learning machine, it is also possible to as paradise of baby etc., more enjoyment are brought to our life.With communication product more
New to regenerate, mobile terminal (such as mobile phone, individual digital assistant PDA etc.) has turned into the indispensable communication tool of people.
Currently, mobile phone photograph is more and more common, in order to lift the interest of photography, the manifestation mode of various mobile phone photographics
Fall over each other to occur, such as time-lapse photography/slow motion/shallow depth of field/slow door/panoramic shooting/HDR patterns, each cell phone manufacturer beats one after another
Go out mobile phone photographic this board, mobile phone photographic is doomed that a main trend can be turned into, and new playing method demand of photographing is increasing.
HDR (High Dynamic Range, referred to as HDR) image composing technique is that one kind utilizes computer
High-speed computation produces the scene image synthetic technology of high quality vivid effect, is widely used in computer program development, medical shadow
The fields such as picture, remote sensing image processing and computer graphics.The dynamic range of high dynamic range images is higher, that is, represents that image is bright
Subdivision between the maxima and minima of angle value is more, that is,：Dynamic range shows more greatly scene details that image is shown more
More, visual effect is more true to nature.
Because the exposure of single image is fixed, obtained scene dynamic range is very limited, it is therefore desirable to by multiple
Expose to recover the real illumination data of actual scene, so as to obtain HDR image.
In order to obtain the image of exposure relative equilibrium under big light ratio (i.e. light luminance contrast is big) environmental condition, work as remote holder
The method that machine terminal solves is to utilize HDR screening-modes, i.e. a shutter opening, and backstage continuous acquisition two is opened or three expose not
Same image, the image of an exposure relative equilibrium is then synthesized by backstage algorithm.But photographing module during due to collection image
Can only be to carrying out light-metering at independent one of the image in view-finder, so multiple images that actually backstage tentatively obtains can not
The tolerance of current environment is surrounded very accurately, and the common shooting of dynamic range contrast does not protrude, so as to be difficult to synthesize one
Expose balanced image.
For difficult the problem of synthesizing an exposure balanced image in correlation technique, solution is not yet proposed at present.
The content of the invention
It is a primary object of the present invention to propose a kind of image processing method and mobile terminal, it is intended to solve in correlation technique
Difficulty synthesizes the problem of exposure balanced image.
To achieve the above object, the embodiment of the present invention proposes a kind of image processing method, including：
Light-metering is carried out to the first coordinate points in selected viewfinder window by the module A of dual camera, counted by backstage
Calculation obtains the exposure value of image, obtains preview image 1；
Light-metering is carried out to the second coordinate points in the selected viewfinder window by the module B of dual camera, by rear
The exposure value of image is calculated in platform, obtains preview image 2；
Image 1 is generated according to the preview image 1, image 2 is generated according to the preview image 2；
Synthesis processing is carried out to image according to described image 1 and described image 2.
Preferably, methods described also includes：
Light-metering is carried out to the second selected coordinate points in the module B by dual camera, image is obtained by hind computation
Exposure value, before obtaining preview image 2, receive the determine instruction for determining the preview image 1；
The exposure value of image is being obtained by hind computation, after obtaining preview image 2, is receiving and determines the preview image
2 determine instruction.
Preferably, synthesis processing is carried out to image according to described image 1 and described image 2 includes：
HDR hybrid operations are carried out according to described image 1 and described image 2 and obtain composograph.
Preferably, obtain composograph according to described image 1 and the progress HDR hybrid operations of described image 2 and include：
Described image 1 and described image 2 are subjected to registration process；
Described image 1 and described image 2 are decomposed into by high and low frequency part by wavelet transformation, obtained two width difference
The coefficient of wavelet decomposition of exposure image；
Fusion generation HDR image is carried out according to the coefficient of wavelet decomposition of the two width difference exposure image.
Preferably, after synthesis processing is carried out to image according to described image 1 and described image 2, methods described is also wrapped
Include：
Delete the described image 1 and image 2 of caching；
Viewfinder window is returned, and shows the image of synthesis.
Another aspect according to embodiments of the present invention, a kind of image procossing mobile terminal is additionally provided, including：
First light-metering module, the first coordinate in selected viewfinder window is clicked through for the module A by dual camera
Row light-metering, the exposure value of image is obtained by hind computation, obtains preview image 1；
Second light-metering module, for the module B by dual camera to the second coordinate in the selected viewfinder window
Point carries out light-metering, obtains the exposure value of image by hind computation, obtains preview image 2；
Generation module, for generating image 1 according to the preview image 1, image 2 is generated according to the preview image 2；
Processing module is synthesized, for carrying out synthesis processing to image according to described image 1 and described image 2.
Preferably, the mobile terminal also includes：
First receiving module, for carrying out light-metering to the second selected coordinate points in the module B by dual camera, pass through
Hind computation obtains the exposure value of image, before obtaining preview image 2, receives the determine instruction for determining the preview image 1；
Second receiving module, for obtaining the exposure value of image by hind computation, after obtaining preview image 2, connect
Receive the determine instruction for determining the preview image 2.
Preferably, the synthesis processing module, it is additionally operable to carry out HDR hybrid operations according to described image 1 and described image 2
Obtain composograph.
Preferably, the synthesis processing module includes：
Registration process unit, for described image 1 and described image 2 to be carried out into registration process；
Resolving cell, for described image 1 and described image 2 to be decomposed into high and low frequency part by wavelet transformation,
The coefficient of wavelet decomposition of two width difference exposure images is obtained；
Generation unit, for carrying out fusion generation HDR figures according to the coefficient of wavelet decomposition of the two width difference exposure image
Picture.
Preferably, the mobile terminal also includes：
Removing module, for deleting the described image 1 and image 2 of caching；
Display module, for returning to viewfinder window, and show the image of synthesis.
By the present invention, light-metering is carried out to the first coordinate points in selected viewfinder window by the module A of dual camera,
The exposure value of image is obtained by hind computation, obtains preview image 1；By the module B of dual camera to taking described in selected
The second coordinate points in scape window carry out light-metering, obtain the exposure value of image by hind computation, obtain preview image 2；According to
The preview image 1 generates image 1, and image 2 is generated according to the preview image 2；It is right according to described image 1 and described image 2
Image carries out synthesis processing, solves the problems, such as the difficult image for synthesizing an exposure equilibrium in correlation technique, by more accurate
Image data acquiring, improve the ability of particularly under the conditions of big light ratio acquisition for mobile terminal exposure equilibrium figures picture, so as to
A relatively high image of dynamic range is obtained, the practicality and interest of shooting is lifted, then lifts 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 image processing method according to embodiments of the present invention；
Fig. 4 is the flow chart of generation HDR image according to embodiments of the present invention；
Fig. 5 is the schematic diagram of different exposure images according to embodiments of the present invention；
Fig. 6 is the schematic diagram of image slices vegetarian refreshments alignment according to embodiments of the present invention；
Fig. 7 is the schematic diagram that wavelet transformation according to embodiments of the present invention carries out decomposition diagram to image；
Fig. 8 is the flow chart of wavelet decomposition HDR image fusion according to embodiments of the present invention；
Fig. 9 is the schematic diagram of different exposure synthesis HDR images according to embodiments of the present invention；
Figure 10 is the block diagram of image procossing mobile terminal according to embodiments of the present invention；
Figure 11 is the block diagram of image procossing mobile terminal according to the preferred embodiment of the invention；
Figure 12 is the block diagram of HDR camera terminals according to the preferred embodiment of the 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.
Describe to realize the mobile terminal of each embodiment of the present invention referring now to accompanying drawing.In follow-up description, use
For represent element such as " module ", " part " or " unit " suffix only for be advantageous to the present invention explanation, itself
Not specific meaning.Therefore, " module " can be used mixedly with " part ".
Mobile terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as moving
Phone, smart phone, notebook computer, digit broadcasting receiver, PDA (personal digital assistant), PAD (tablet personal computer), PMP
The mobile terminal of (portable media player), guider etc. and such as digital TV, desktop computer etc. are consolidated
Determine terminal.Hereinafter it is assumed that terminal is mobile terminal.However, it will be understood by those skilled in the art that except being used in particular for moving
Outside the element of purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Fig. 1 is the hardware architecture diagram for realizing each one optional mobile terminal of embodiment of the present invention.
Mobile terminal 100 can include wireless communication unit 110, A/V (audio/video) input block 120, user's input
Unit 130, sensing unit 140, output unit 150, memory 160, interface unit 170, controller 180 and power subsystem 190
Etc..
Fig. 1 shows the mobile terminal 100 with various assemblies, it should be understood that being not required for implementing all show
The component gone out.More or less components can alternatively be implemented.The element of mobile terminal 100 will be discussed in more detail below.
Wireless communication unit 110 can generally include one or more assemblies, and it allows mobile terminal 100 and radio communication
Radio communication between system or network.For example, wireless communication unit 110 can include broadcasting reception module 111, movement is led to
Believe at least one in module 112, wireless Internet module 113, short range communication module 114 and location information module 115.
Broadcasting reception module 111 receives broadcast singal and/or broadcast via broadcast channel from external broadcast management server
Relevant information.Broadcast channel can include satellite channel and/or terrestrial channel.Broadcast management server can be generated and sent
The broadcast singal and/or broadcast related information that the server or reception of broadcast singal and/or broadcast related information generate before
And send it to the server of terminal.Broadcast singal can include TV broadcast singals, radio signals, data broadcasting
Signal etc..Moreover, broadcast singal may further include the broadcast singal combined with TV or radio signals.Broadcast phase
Closing information can also provide via mobile communications network, and in this case, broadcast related information can be by mobile communication mould
Block 112 receives.Broadcast singal can exist in a variety of manners, for example, it can be with DMB (DMB) electronics
Program guide (EPG), digital video broadcast-handheld (DVB-H) electronic service guidebooks (ESG) etc. form and exist.Broadcast
Receiving module 111 can be broadcasted by using various types of broadcast system reception signals.Especially, broadcasting reception module 111
Can be wide by using such as multimedia broadcasting-ground (DMB-T), DMB-satellite (DMB-S), digital video
Broadcast-hold (DVB-H), the Radio Data System of forward link media (MediaFLO@), received terrestrial digital broadcasting integrated service
Etc. (ISDB-T) digit broadcasting system receives digital broadcasting.Broadcasting reception module 111, which may be constructed such that, to be adapted to provide for extensively
Broadcast the various broadcast systems of signal and above-mentioned digit broadcasting system.Via broadcasting reception module 111 receive broadcast singal and/
Or broadcast related information can be stored in memory 160 (or other types of storage medium).
Mobile communication module 112 sends radio signals to base station (for example, access point, node B etc.), exterior terminal
And at least one in server and/or receive from it radio signal.Such radio signal can lead to including voice
Talk about signal, video calling signal or the various types of data for sending and/or receiving according to text and/or Multimedia Message.
Wireless Internet module 113 supports the Wi-Fi (Wireless Internet Access) of mobile terminal.The module can be internally or externally
It is couple to terminal.Wi-Fi (Wireless Internet Access) technology involved by the module can include WLAN (WLAN) (Wi-Fi), Wibro
(WiMAX), Wimax (worldwide interoperability for microwave accesses), HSDPA (high-speed downlink packet access) etc..
Short range communication module 114 is the module for supporting junction service.Some examples of short-range communication technology include indigo plant
Tooth TM, radio frequency identification (RFID), Infrared Data Association (IrDA), ultra wide band (UWB), purple honeybee TM etc..
Location information module 115 is the module for checking or obtaining the positional information of mobile terminal.Location information module
115 typical case is GPS (global positioning system).According to current technology, GPS calculate from three or more satellites away from
From information and correct time information and for the Information application triangulation of calculating, so as to according to longitude, latitude and height
Degree calculates three-dimensional current location information exactly.Currently, three satellites are used simultaneously for the method for calculation position and temporal information
And the position calculated by using other satellite correction and the error of temporal information.In addition, GPS can be by real-time
Ground Continuous plus current location information carrys out calculating speed information.
A/V input blocks 120 are used to receive audio or video signal.A/V input blocks 120 can include the He of camera 121
Microphone 122, camera 121 in video acquisition mode or image capture mode by image capture apparatus obtain static images
Or the view data of video is handled.Picture frame after processing may be displayed on display unit 151.Handled through camera 121
Picture frame afterwards can be stored in memory 160 (or other storage mediums) or be sent out via wireless communication unit 110
Send, two or more cameras 121 can be provided according to the construction of mobile terminal 100.Microphone 122 can be in telephone relation mould
In formula, logging mode, speech recognition mode etc. operational mode sound (voice data), and energy are received via microphone 122
It is voice data enough by such acoustic processing.Audio (voice) data after processing can be in the case of telephone calling model
The form output of mobile communication base station can be sent to via mobile communication module 112 by being converted to.Microphone 122 can be implemented various
To eliminate, (or suppression) is caused during receiving and sending audio signal to make an uproar noise elimination (or suppression) algorithm of type
Sound or interference.
The order that user input unit 130 can input according to user generates key input data to control mobile terminal 100
Various operations.User input unit 130 allows user to input various types of information, and can include keyboard, metal dome,
Touch pad (for example, sensitive component of detection change of resistance, pressure, electric capacity etc. caused by being touched), roller, shake
Bar etc..Especially, when touch pad is superimposed upon on display unit 151 in the form of layer, touch-screen can be formed.
Sensing unit 140 detects the current state of mobile terminal 100, (for example, mobile terminal 100 opens or closes shape
State), the presence or absence of the contact (that is, touch input) of the position of mobile terminal 100, user for mobile terminal 100, mobile terminal
100 orientation, the acceleration or deceleration movement of mobile terminal 100 and direction etc., and generate for controlling mobile terminal 100
The order of operation or signal.For example, when mobile terminal 100 is embodied as sliding-type mobile phone, sensing unit 140 can sense
The sliding-type phone is opening or closing.In addition, sensing unit 140 can detect power subsystem 190 whether provide electric power or
Whether person's interface unit 170 couples with external device (ED).Sensing unit 140 can include proximity transducer 141.
Interface unit 170 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..Identification module can be that storage is used to verify that user uses each of mobile terminal 100
Plant information and subscriber identification module (UIM), client identification module (SIM), Universal Subscriber identification module (USIM) can be included
Etc..In addition, the device with identification module can (hereinafter referred to as " identification device ") take the form of smart card, therefore, know
Other device can be connected via port or other attachment means with mobile terminal 100.Interface unit 170 can be used for reception and come from
The input (for example, data message, electric power etc.) of external device (ED) and the input received is transferred in mobile terminal 100
One or more elements can be used for transmitting data between mobile terminal 100 and external device (ED).
In addition, when mobile terminal 100 is connected with external base, interface unit 170 may be used as allowing by it by electricity
Power provides to the path of mobile terminal 100 from base or may be used as allowing to pass through it from the various command signals that base inputs
It is transferred to the path of mobile terminal 100.It may be used as identifying mobile terminal 100 from the various command signals or electric power of base input
The signal whether being accurately fitted within base.Output unit 150 is configured to provide with vision, audio and/or tactile manner
Output signal (for example, audio signal, vision signal, alarm signal, vibration signal etc.).Output unit 150 can include aobvious
Show unit 151, dio Output Modules 152, alarm unit 153 etc..
Display unit 151 may be displayed in mobile terminal 100 information handled.For example, when mobile terminal 100 is in electricity
When talking about call mode, display unit 151 can be shown with conversing or other communicating (for example, text messaging, multimedia file
Download etc.) related user interface (UI) or graphic user interface (GUI).When mobile terminal 100 is in video calling pattern
Or during image capture mode, display unit 151 can show the image of capture and/or the image of reception, show video or figure
UI or GUI of picture and correlation function etc..
Meanwhile when display unit 151 and touch pad in the form of layer it is superposed on one another to form touch-screen when, display unit
151 may be used as input unit and output device.Display unit 151 can include liquid crystal display (LCD), thin film transistor (TFT)
In LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible display, three-dimensional (3D) display etc. at least
It is a kind of.Some in these displays may be constructed such that transparence to allow user to be watched from outside, and this is properly termed as transparent
Display, typical transparent display can be, for example, TOLED (transparent organic light emitting diode) display etc..According to specific
Desired embodiment, mobile terminal 100 can include two or more display units (or other display devices), for example, moving
Dynamic terminal 100 can include outernal display unit (not shown) and inner display unit (not shown).Touch-screen can be used for detecting
Touch input pressure and touch input position and touch input area.
Dio Output Modules 152 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
It is receiving or in memory by wireless communication unit 110 when under the isotypes such as formula, speech recognition mode, broadcast reception mode
The voice data transducing audio signal and output stored in 160 is sound.Moreover, dio Output Modules 152 can provide with
The audio output for the specific function correlation that mobile terminal 100 performs is (for example, call signal receives sound, message sink sound etc.
Deng).Dio Output Modules 152 can include loudspeaker, buzzer etc..
Alarm unit 153 can provide output so that event is notified to mobile terminal 100.Typical event can be with
Including calling reception, message sink, key signals input, touch input etc..In addition to audio or video exports, alarm unit
153 can provide output in a different manner with the generation of notification event.For example, alarm unit 153 can be in the form of vibration
There is provided output, when receive calling, message or some it is other enter communication (incoming communication) when, alarm list
Member 153 can provide tactile output (that is, vibrating) to notify to user.Exported by tactile as offer, even in
When the mobile phone of user is in the pocket of user, user also can recognize that the generation of various events.Alarm unit 153
The output of the generation of notification event can be provided via display unit 151 or dio Output Modules 152.
Memory 160 can store software program of the processing performed by controller 180 and control operation etc., Huo Zheke
Temporarily to store oneself data (for example, telephone directory, message, still image, video etc.) through exporting or will export.And
And memory 160 can store the vibration of various modes on being exported when touching and being applied to touch-screen and audio signal
Data.
Memory 160 can include the storage medium of at least one type, and the storage medium includes flash memory, hard disk, more
Media card, card-type memory (for example, SD or DX memories etc.), random access storage device (RAM), static random-access storage
Device (SRAM), read-only storage (ROM), Electrically Erasable Read Only Memory (EEPROM), programmable read only memory
(PROM), magnetic storage, disk, CD etc..Moreover, mobile terminal 100 can be with performing memory by network connection
The network storage device cooperation of 160 store function.
Controller 180 generally controls the overall operation of mobile terminal.For example, controller 180 performs and voice call, data
Communication, video calling etc. related control and processing.In addition, controller 180 can include being used to reproduce (or playback) more matchmakers
The multi-media module 181 of volume data, multi-media module 181 can be constructed in controller 180, or be can be structured as and controlled
Device 180 separates.Controller 180 can be with execution pattern identifying processing, by the handwriting input performed on the touchscreen or picture
Draw input and be identified as character or image.
Power subsystem 190 receives external power or internal power under the control of controller 180 and provides operation each member
Appropriate electric power needed for part and component.
Various embodiments described herein can be with use such as computer software, hardware or its any combination of calculating
Machine computer-readable recording medium is implemented.Implement for hardware, embodiment described herein can be by using application-specific IC
(ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), scene can
Programming gate array (FPGA), processor, controller, microcontroller, microprocessor, it is designed to perform function described herein
At least one of electronic unit is implemented, and in some cases, such embodiment can be implemented in controller 180.
For software implementation, the embodiment of such as process or function can be with allowing to perform the single of at least one function or operation
Software module is implemented.Software code can by the software application (or program) write with any appropriate programming language Lai
Implement, software code can be stored in memory 160 and be performed by controller 180.
So far, oneself according to its function through describing mobile terminal 100.In addition, the mobile terminal 100 in the embodiment of the present invention
It can be such as folded form, board-type, oscillating-type, sliding-type and other various types of mobile terminals, not do herein specifically
Limit.
Mobile terminal 100 as shown in Figure 1 may be constructed such that using via frame or packet transmission data it is all if any
Line and wireless communication system and satellite-based communication system operate.
The communication system that can be wherein operated according to the mobile terminal of the present invention referring now to Fig. 2 descriptions.
Such communication system can use different air interface and/or physical layer.For example, used by communication system
Air interface includes such as frequency division multiple access (FDMA), time division multiple acess (TDMA), CDMA (CDMA) and universal mobile communications system
System (UMTS) (especially, Long Term Evolution (LTE)), global system for mobile communications (GSM) etc..As non-limiting example, under
The description in face is related to cdma communication system, but such teaching is equally applicable to other types of system.
With reference to figure 2, cdma wireless communication system can include multiple intelligent terminals 100, multiple base stations (BS) 270, base station
Controller (BSC) 275 and mobile switching centre (MSC) 280.MSC 280 is configured to and Public Switched Telephony Network (PSTN)
290 form interface.MSC 280 is also structured to be formed with the BSC 275 that can be couple to base station 270 via back haul link and connect
Mouthful.If back haul link can construct according to any of interface that Ganji knows, the interface can include such as Europe mark
Quasi- high power capacity digital circuit/Unite States Standard high power capacity digital circuit (E1/T1), asynchronous transfer mode (ATM), procotol
(IP), point-to-point protocol (PPP), frame relay, high-bit-rate digital subscriber line road (HDSL), Asymmetrical Digital Subscriber Line (ADSL)
Or all kinds digital subscriber line (xDSL).It will be appreciated that system can include multiple BSC 275 as shown in Figure 2.
Each BS 270 can service one or more subregions (or region), by multidirectional antenna or the day of sensing specific direction
Each subregion of line covering is radially away from BS 270.Or each subregion can by two for diversity reception or more
Multiple antennas covers.Each BS 270, which may be constructed such that, supports multiple frequency distribution, and each frequency distribution has specific frequency
Compose (for example, 1.25MHz, 5MHz etc.).
What subregion and frequency were distributed, which intersects, can be referred to as CDMA Channel.BS 270 can also be referred to as base station transceiver
System (BTS) or other equivalent terms.In this case, term " base station " can be used for broadly representing single BSC
275 and at least one BS 270.Base station can also be referred to as " cellular station ".Or specific BS 270 each subregion can be claimed
For multiple cellular stations.
As shown in Figure 2, broadcast singal is sent to the mobile terminal operated in system by broadcsting transmitter (BT) 295
100.Broadcasting reception module 111 as shown in Figure 1 is arranged at mobile terminal 100 to receive the broadcast sent by BT 295
Signal.In fig. 2 it is shown that several global positioning system (GPS) satellites 300.Satellite 300 helps to position multiple mobile terminals
It is at least one in 100.
In fig. 2, multiple satellites 300 are depicted, it is understood that, any number of satellite can be utilized to obtain useful
Location information.Location information module 115 as shown in Figure 1 is (such as：GPS) it is generally configured to coordinate to obtain with satellite 300
The location information that must be wanted.Substitute GPS tracking techniques or outside GPS tracking techniques, can use can track mobile end
Other technologies of the position at end.In addition, at least one gps satellite 300 can optionally or additionally handle satellite dmb biography
It is defeated.
As a typical operation of wireless communication system, BS 270 receives the reverse strand from various mobile terminals 100
Road signal.Mobile terminal 100 generally participates in call, information receiving and transmitting and other types of communication.Certain base station receives each anti-
Handled to link signal in specific BS 270.The data of acquisition are forwarded to the BSC 275 of correlation.BSC provides logical
Talk about resource allocation and the mobile management function of the coordination including the soft switching process between BS 270.BSC 275 will also be received
Data be routed to MSC 280, its provide for PSTN 290 formed interface extra route service.Similarly, PSTN
290 form interface with MSC 280, and MSC and BSC 275 form interface, and BSC 275 correspondingly controls BS 270 with by forward direction
Link signal is sent to mobile terminal 100.
Based on above-mentioned mobile terminal, the embodiments of the invention provide a kind of image processing method, Fig. 3 is according to the present invention
The flow chart of the image processing method of embodiment, as shown in figure 3, this method comprises the following steps：
Step S302, light-metering is carried out to the first coordinate points in selected viewfinder window by the module A of dual camera, led to
Later the exposure value of image is calculated in platform, obtains preview image 1；
Step S304, the second coordinate points in the selected viewfinder window are surveyed by the module B of dual camera
Light, the exposure value of image is obtained by hind computation, obtains preview image 2；
Step S306, image 1 is generated according to the preview image 1, and image 2 is generated according to the preview image 2；
Step S308, synthesis processing is carried out to image according to described image 1 and described image 2.
By above-mentioned steps, light-metering is carried out to the first selected coordinate points by the module A of dual camera, counted by backstage
Calculation obtains the exposure value of image, obtains preview image 1；The second selected coordinate points are surveyed by the module B of dual camera
Light, the exposure value of image is obtained by hind computation, obtains preview image 2；Image 1 is generated according to the preview image 1, according to
The preview image 2 generates image 2；Synthesis processing is carried out to image according to described image 1 and described image 2, solves correlation
Difficult the problem of synthesizing an exposure balanced image, by more accurately image data acquiring, improve particularly in technology
The ability of acquisition for mobile terminal exposure equilibrium figures picture under the conditions of big light ratio, so as to obtain a relatively high figure of dynamic range
Picture, the practicality and interest of shooting are lifted, then lifts Consumer's Experience.
A kind of new HDR image pickup methods that the embodiment of the present invention is proposed, including：
1. user opens double camera module A and B screening-modes, reference object and visual angle are selected, and observe terminal display screen
Realtime graphic preview.
2. clicking on preview image, image coordinate point a is labeled as at click.Camera module A carries out light-metering with point a, by rear
Platform calculates, and obtains the exposure EV values of image, and according to this EV value, realtime graphic preview is shown on terminal display screen.
3. by preview, image 1 is confirmed, if NO, return to step 2.
4. if YES, user's long-press point a confirm image 1.
5. repeat step 2-5 (but point a is not overlapped at click, and coordinate points b) is labeled as at new click, until reaching true
Recognize image 2.
4 users discharge shutter, generate final image 1 and figure according to the preview image 1 and preview image 2 that have confirmed that from the background
As 2.
5. according to the internal set algorithm in backstage, carrying out HDR hybrid operations to obtained image 1 and image 2, (HDR synthesizes mould
Block end individually describes)
6. cache image 1 and image 2 are deleted in backstage.
7. returning to viewfinder window, and show the HDR image ultimately generated.
Preferably, light-metering is carried out to the second selected coordinate points in the module B by dual camera, obtained by hind computation
To the exposure value of image, before obtaining preview image 2, the determine instruction for determining the preview image 1 is received；Counted by backstage
Calculation obtains the exposure value of image, after obtaining preview image 2, receives the determine instruction for determining the preview image 2.
Preferably, HDR hybrid operations are carried out according to described image 1 and described image 2, synthesis processing is carried out to image.Enter
One step, HDR hybrid operations are carried out according to described image 1 and described image 2, synthesis processing is carried out to image to be included：Will
Described image 1 and described image 2 carry out registration process；Described image 1 and described image 2 are decomposed into by high frequency by wavelet transformation
And low frequency part, obtain the coefficient of wavelet decomposition of two width difference exposure images；According to the small of the two width difference exposure image
Wave Decomposition coefficient carries out fusion generation HDR image.
Synthesis HDR image is described in detail below.
Fig. 4 is the flow chart of generation HDR image according to embodiments of the present invention, as shown in figure 4, including：
Step S402, obtain the image Jing Guo binocular difference light exposure.Fig. 5 is different exposures according to embodiments of the present invention
The schematic diagram of image, as shown in figure 5, this two images is respectively low exposure, overexposure light image.
Step S404, because the position of binocular camera is different, there is visual angle difference in the image of shooting, pixel does not correspond to, and need
Registration process is carried out to binocular image.
Fig. 6 is the schematic diagram of image slices vegetarian refreshments alignment according to embodiments of the present invention, as shown in fig. 6, with image A and image
Exemplified by B, the point p (x, y) in A, the point q (x2, y2) corresponded in image B, image alignment is exactly according to the similar of pixel
Property, find out corresponding matched pixel such as the similitude of brightness, color, the institute in traversing graph picture is a little, it is possible to which these are right
The point answered is found out, and completes image alignment.
Step S406, binocular image is decomposed into high and low frequency part using wavelet transformation.Wavelet transformation is image
Multiple dimensioned, Multiresolution Decomposition, it can focus on any details of image, be referred to as microscope mathematically.In recent years, with
The development of wavelet theory and its application, Wavelet Multi-resolution Transform is used for pixel-level image fusion.Wavelet transformation is consolidated
There is characteristic it is had the following advantages in image procossing：
1. perfect re-configurability, ensure that signal does not have information loss and redundancy in decomposable process；
2. a picture breakdown into the combination of the average image and detail pictures, represents the different structure of image respectively, therefore
The easily structural information and detailed information of extraction original image；
3. having fast algorithm, it functions as effect of the fft algorithm in Fourier transform in wavelet transformation,
Necessary means are provided for wavelet transformation application；
4. Fig. 7 is the schematic diagram that wavelet transformation according to embodiments of the present invention carries out decomposition diagram to image, such as Fig. 7 institutes
Show, two dimensional wavelet analysis provides the selective image wavelet decomposition to be matched with human visual system direction and acts on a sub-picture
Schematic diagram, (a) is original image, and (b), (c), (d) is decompose once, secondary, three times wavelet coefficient image.
Step S408, after the wavelet decomposition in step S406, two width difference exposure image wavelet decomposition systems are obtained
Number.
By observe two width difference light exposures in Fig. 5 image it can be found that under-exposed image in highlights details
Region contrast it is preferable, image detail is clear, such as the cloud part that it is aerial；The image of overexposure is in dark portion details ratio
It is more visible, such as the green thick grass under city wall, image detail be clear；
Fig. 8 is the flow chart of wavelet decomposition HDR image fusion according to embodiments of the present invention, as shown in figure 8, including：It is right
Source images A carries out wavelet decomposition and obtains high-frequency sub-band coefficient A1 and low frequency sub-band coefficient A2；Wavelet decomposition is carried out to source images B to obtain
To the He of high-frequency sub-band coefficient B 1, height is calculated by high frequency fusion rule in high-frequency sub-band coefficient A1 and high-frequency sub-band coefficient B 1
Frequency fusion coefficients, low frequency fusion system is calculated by low frequency fusion rule in low frequency sub-band coefficient A2 and low frequency sub-band coefficient B 2
Number, high frequency fusion coefficients and low frequency fusion coefficients are subjected to inverse transformation and obtain fused images.HDR image is exactly to need to retain scene
In dark portion and highlights details, strengthen the details of the overall brightness scope of image.Therefore, it is necessary to by these phases after wavelet decomposition
The coefficient of clearly details is remained, the selection of fusion rule is the key of blending algorithm.
Therefore, local area contrast and global gradient image feature calculation are carried out to the wavelet coefficient after decomposition, it is raw
It is as follows into the weights image WeightMap of two width difference exposure image fusion coefficients, calculating process：
WM (i, j)=CLi,j*GLi,j (1)
I in formula, j are the coordinate of any pixel p points in image, and WM (i, j) is that the pixel participates in the initial of blending algorithm
Change weights, CLi,jFor the local area contrast of the pixel, GLi,jFor the Grad size of the pixel.
In formula (2), p (i, j) is the pixel value of the pixel, and m (i, j) is regional area average value.Utilized in formula (3)
Soble operators calculate image in gradient magnitude both horizontally and vertically.The operator includes two groups of 3x3 matrix, is respectively horizontal stroke
To and longitudinal direction, it and image are made into planar convolution, you can draw the brightness difference approximation of transverse direction and longitudinal direction respectively.If with I
Original image is represented, Gx and Gy represent the image through longitudinal direction and transverse edge detection respectively, and G is the gradient that the image pixel is pointed out
Size, its formula are as follows：
According to above-mentioned calculating process, the blending weight figure of the different exposure image image of two width can be calculated respectively
In formula 4, WM (I, k) is the blending weight coefficient of kth width image, thus by the fusion coefficients of different exposure images
Weights normalize, and meetPixel is without departing from original codomain scope after ensure that image co-registration.Press
Illuminated son (5) can is by the wavelet coefficient of 2 width picture breakdowns is merged, high frequency coefficient and low frequency coefficient fusion rule one
Cause, be to be multiplied by blending weight coefficient.
From the equations above calculate as can be seen that region contrast it is bigger, the bigger explanation of Gradient Features, the area of the pixel
Characteristic of field is more obvious, and image detail is more clear, is to need to retain image slices vegetarian refreshments in HDR image, therefore blending weight also compares
Greatly.
Step S410, generate HDR image.Fig. 9 is the signal of different exposure synthesis HDR images according to embodiments of the present invention
Figure, as shown in figure 9, the sky in HDR composographs remains the sky clear area of under-exposed image-region, on city wall
Green thick grass also remains the dark portion details in overexposed image region.Referring to the region part of red elliptic mark.
In a preferred embodiment, image is being carried out according to described image 1 and described image 2 to synthesize processing
Afterwards, the described image 1 and image 2 of caching are deleted, returns to viewfinder window, and show the image of synthesis.
Another aspect according to embodiments of the present invention, additionally provides a kind of image procossing mobile terminal, and Figure 10 is according to this
The block diagram of the image procossing mobile terminal of inventive embodiments, as shown in Figure 10, including：
First light-metering module 102, for the module A by dual camera to the first coordinate points in selected viewfinder window
Light-metering is carried out, the exposure value of image is obtained by hind computation, obtains preview image 1；
Second light-metering module 104, second in the selected viewfinder window is sat for the module B by dual camera
Punctuate carries out light-metering, obtains the exposure value of image by hind computation, obtains preview image 2；
Generation module 106, for generating image 1 according to the preview image 1, image is generated according to the preview image 2
2；
Processing module 108 is synthesized, for carrying out synthesis processing to image according to described image 1 and described image 2.
Preferably, the mobile terminal also includes：
First receiving module, for carrying out light-metering to the second selected coordinate points in the module B by dual camera, pass through
Hind computation obtains the exposure value of image, before obtaining preview image 2, receives the determine instruction for determining the preview image 1；
Second receiving module, for obtaining the exposure value of image by hind computation, after obtaining preview image 2, connect
Receive the determine instruction for determining the preview image 2.
Preferably, the synthesis processing module 108, is additionally operable to carry out HDR mixing according to described image 1 and described image 2
Computing obtains composograph.
Figure 11 is the block diagram of image procossing mobile terminal according to the preferred embodiment of the invention, as shown in figure 11, the conjunction
Include into processing module 108：
Registration process unit 112, for described image 1 and described image 2 to be carried out into registration process；
Resolving cell 114, for described image 1 and described image 2 to be decomposed into high and low frequency portion by wavelet transformation
Point, obtain the coefficient of wavelet decomposition of two width difference exposure images；
Generation unit 116, for carrying out fusion generation HDR according to the coefficient of wavelet decomposition of the two width difference exposure image
Image.
Preferably, the mobile terminal also includes：
Removing module, for deleting the described image 1 and image 2 of caching；
Display module, for returning to viewfinder window, and show the image of synthesis.
The embodiment of the present invention additionally provides a kind of HDR camera terminals, and corresponding with above-mentioned image processing terminal, Figure 12 is root
According to the block diagram of the HDR camera terminals of the preferred embodiment of the present invention, as shown in figure 12, including：
Control module 121, for the operation of each module of Comprehensive Control, and then control whole flow process.
Taking module 122, it is different in shooting process, light-metering being carried out to scene specified location and gathering two exposures
Image to cache module.
Computing module 123, for the light exposure required for calculating collection image according to taking module light-metering；For by two
Open image and carry out HDR algorithm synthesis, and the image of generation is stored in temporary storage module.
Memory module 124, for storing the panoramic picture ultimately generated.
Display module 125, for carrying out live preview in shooting process；Ultimately generated for being shown in viewfinder window
HDR image.
Cache module 126, for caching described image data.
Temporary storage module 127, ephemeral data during generation HDR is calculated for interim storage；For described in interim storage
HDR image.
The embodiment of the present invention, light-metering is carried out to the first selected coordinate points by the module A of dual camera, counted by backstage
Calculation obtains the exposure value of image, obtains preview image 1；The second selected coordinate points are surveyed by the module B of dual camera
Light, the exposure value of image is obtained by hind computation, obtains preview image 2；Image 1 is generated according to the preview image 1, according to
The preview image 2 generates image 2；Synthesis processing is carried out to image according to described image 1 and described image 2, solves correlation
Difficult the problem of synthesizing an exposure balanced image, by more accurately image data acquiring, improve particularly in technology
The ability of acquisition for mobile terminal exposure equilibrium figures picture under the conditions of big light ratio, so as to obtain a relatively high figure of dynamic range
Picture, the practicality and interest of shooting are lifted, then lifts 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 equipment (can be mobile phone, computer, clothes
Business device, air conditioner, or network equipment etc.) perform the method that each embodiment of the present invention is somebody's turn to do.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
- A kind of 1. image processing method, it is characterised in that including：Light-metering is carried out to the first coordinate points in selected viewfinder window by the module A of dual camera, obtained by hind computation To the exposure value of image, preview image 1 is obtained；Light-metering is carried out to the second coordinate points in the selected viewfinder window by the module B of dual camera, counted by backstage Calculation obtains the exposure value of image, obtains preview image 2；Image 1 is generated according to the preview image 1, image 2 is generated according to the preview image 2；Synthesis processing is carried out to image according to described image 1 and described image 2.
- 2. according to the method for claim 1, it is characterised in that methods described also includes：Light-metering is carried out to the second selected coordinate points in the module B by dual camera, the exposure of image is obtained by hind computation Light value, before obtaining preview image 2, receive the determine instruction for determining the preview image 1；The exposure value of image is being obtained by hind computation, after obtaining preview image 2, is receiving and determines the preview image 2 Determine instruction.
- 3. according to the method for claim 1, it is characterised in that image is closed according to described image 1 and described image 2 Include into the step of processing：HDR HDR hybrid operations are carried out according to described image 1 and described image 2 and obtain composograph.
- 4. according to the method for claim 3, it is characterised in that HDR mixing is carried out according to described image 1 and described image 2 Computing, which obtains the step of composograph, to be included：Described image 1 and described image 2 are subjected to registration process；Described image 1 and described image 2 are decomposed into by high and low frequency part by wavelet transformation, obtained the different exposures of two width The coefficient of wavelet decomposition of image；Fusion generation HDR image is carried out according to the coefficient of wavelet decomposition of the two width difference exposure image.
- 5. method according to any one of claim 1 to 4, it is characterised in that according to described image 1 and described image After 2 pairs of images carry out synthesis processing, methods described also includes：Delete the described image 1 and image 2 of caching；Viewfinder window is returned, and shows the image of synthesis.
- A kind of 6. image procossing mobile terminal, it is characterised in that including：First light-metering module, the first coordinate points in selected viewfinder window are surveyed for the module A by dual camera Light, the exposure value of image is obtained by hind computation, obtains preview image 1；Second light-metering module, the second coordinate in the selected viewfinder window is clicked through for the module B by dual camera Row light-metering, the exposure value of image is obtained by hind computation, obtains preview image 2；Generation module, for generating image 1 according to the preview image 1, image 2 is generated according to the preview image 2；Processing module is synthesized, for carrying out synthesis processing to image according to described image 1 and described image 2.
- 7. mobile terminal according to claim 6, it is characterised in that the mobile terminal also includes：First receiving module, for carrying out light-metering to the second selected coordinate points in the module B by dual camera, pass through backstage The exposure value of image is calculated, before obtaining preview image 2, receives the determine instruction for determining the preview image 1；Second receiving module, for obtaining the exposure value of image by hind computation, after obtaining preview image 2, receive true The determine instruction of the fixed preview image 2.
- 8. mobile terminal according to claim 6, it is characterised in that the synthesis processing module, be additionally operable to according to Image 1 and described image 2 carry out HDR hybrid operations and obtain composograph.
- 9. mobile terminal according to claim 8, it is characterised in that the synthesis processing module includes：Registration process unit, for described image 1 and described image 2 to be carried out into registration process；Resolving cell, for described image 1 and described image 2 to be decomposed into high and low frequency part by wavelet transformation, obtain The coefficient of wavelet decomposition of two width difference exposure images；Generation unit, for carrying out fusion generation HDR image according to the coefficient of wavelet decomposition of the two width difference exposure image.
- 10. the mobile terminal according to any one of claim 6 to 9, it is characterised in that the mobile terminal also includes：Removing module, for deleting the described image 1 and image 2 of caching；Display module, for returning to viewfinder window, and show the image of synthesis.
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