CN107613218A - The image pickup method and mobile terminal of a kind of high dynamic range images - Google Patents
The image pickup method and mobile terminal of a kind of high dynamic range images Download PDFInfo
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Abstract
The invention provides a kind of image pickup method of high dynamic range images and mobile terminal, wherein, methods described includes：Control the first camera to carry out image preview, and control second camera to carry out image taking；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in preview interface；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；The image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.Suspend preview interface during so as to solve to take pictures and show that the problem of influenceing preview interface normal use has reached the beneficial effect for not influenceing preview interface normal use.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of image pickup method of high dynamic range images and movement are eventually
End.
Background technology
Video camera for not supporting zigzag HDR function, multiframe synthesis is not carried out in preview, so as to
When shooting the scene of HDR, the situation that dark place is excessively dark, bright place is excessively bright often occurs.
In the prior art, the LTM (Local Tone Mapping, local tone mapping) provided using platform is by dark space
The brightness in domain is suitably heightened, and uses ADRC (Active Disturbance Rejection Controller, Active Disturbance Rejection Control
Device) function suitably turns down the brightness of overly bright region.LTM and ADRC functions, sensor crawl are first shut off when taking pictures
Image first do not shown in preview interface；Then normal exposure, overexposure and under exposed picture frame are captured；Finally, will
The picture frame of three kinds of depth of exposures carries out multiframe synthesis, and after composition shows the image of sensor crawl in preview interface
Show.
From said process as can be seen that due to needing to close ADRC and LTM functions in shooting image, preview can be caused to draw
Face flashes, so needing pause preview to show, so as to influence the normal use of preview interface.
The content of the invention
The embodiment of the present invention provides a kind of image pickup method and mobile terminal of high dynamic range images, temporary when being taken pictures with solution
Stop preview interface to show, the problem of influenceing preview interface normal use.
On the one hand, the embodiment of the invention discloses a kind of image pickup method of high dynamic range images, applied to mobile terminal,
Including：
Control the first camera to carry out image preview, and control second camera to carry out image taking；
Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in preview
Interface；
If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；
The image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.
On the other hand, the embodiment of the invention also discloses a kind of mobile terminal, including：
Control module, for controlling the first camera to carry out image preview, and second camera is controlled to carry out image taking；
Preview display module, carried out for the mistake dark areas in the image that is gathered to first camera and overly bright region
Processing, and it is shown in preview interface；
Taking module, if for receiving shooting instruction, obtain the second camera and gather different exposure parameters
Image；
Image synthesis unit, for the image of the different exposure parameters to be carried out into image synthesis, generate HDR
Image.
Another further aspect, the embodiment of the invention also discloses a kind of mobile terminal, including processor, memory and it is stored in institute
The computer program that can be run on memory and on the processor is stated, when the computer program is by the computing device
The step of realizing the as above image pickup method of the high dynamic range images described in any one.
In embodiments of the present invention, control the first camera to carry out image preview, and control second camera to carry out image
Shooting；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in preview circle
Face；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；By the different exposures
The image of parameter carries out image synthesis, generates high dynamic range images.Suspend preview interface during so as to solve to take pictures to show,
The problem of influenceing preview interface normal use, the beneficial effect for not influenceing preview interface normal use is reached.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow above and other objects of the present invention, feature and advantage can
Become apparent, below especially exemplified by the embodiment of the present invention.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 shows a kind of step flow chart of the image pickup method of high dynamic range images in the embodiment of the present invention one；
Fig. 2 shows a kind of step flow chart of the image pickup method of high dynamic range images in the embodiment of the present invention two；
Fig. 3 shows a kind of structured flowchart of mobile terminal in the embodiment of the present invention three；
Fig. 4 shows a kind of structured flowchart of mobile terminal in the embodiment of the present invention four；
Fig. 5 shows a kind of structured flowchart of mobile terminal in the embodiment of the present invention five.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
A kind of high dynamic range images provided by the invention are discussed in detail below by several specific embodiments are enumerated
Image pickup method and mobile terminal.
Reference picture 1, show a kind of step flow of the image pickup method of high dynamic range images of the embodiment of the present invention one
Figure, specifically may include steps of：
Step 101, control the first camera to carry out image preview, and control second camera to carry out image taking.
In actual applications, the opening of any camera is grasped in user is received to the first camera or second camera
When making, while start the first camera and second camera.The opening button of first camera and second camera can be same
One, can also be different.When user clicks on wherein any one button, two buttons will be started simultaneously.Specifically, on backstage
The first camera and second camera is respectively started by starting two threads.
It is appreciated that in order to ensure that the first camera is identical with the image that second camera obtains, the first camera and
Two cameras are simultaneously before mobile terminal, or below.So as to which the first camera and second camera can not be respectively rearmounted
Camera and front camera.
In addition, the coverage of the first camera and second camera needs to be adjusted according to shooting angle, so that
It is identical to obtain the image that both shootings obtain.For example, when the first camera and second camera are in mobile terminal back side phase
, it is necessary to adjust the left and right shooting angle of any of which camera according to both level intervals when on same level position, so that
The coverage for obtaining both is identical.In embodiments of the present invention, the shooting angle of two cameras can also be adjusted simultaneously,
The shooting angle of one of camera can also be adjusted.
Step 102, the mistake dark areas in the image of first camera collection and overly bright region are handled, and shown
Show in preview interface.
Wherein, it is the too small image-region of pixel brightness value to cross dark areas, and overly bright region is the excessive figure of pixel brightness value
As region.In actual applications, it can judge whether image-region is excessively bright or excessively dark based on experience value.
Specifically, the LTM functions and ADRC functions that platform ISP is provided are opened.Wherein, LTM functions can automatically will be excessively dark
Region is suitably lightened, and ADRC functions automatically can suitably be dimmed overly bright region.For example, the pixel that dark areas will be crossed
Brightness value increases designated value, and the pixel brightness value of overly bright region is reduced into designated value.
It is appreciated that the first camera captures image incessantly always, and excessively bright and dark areas excessively is handled, and
It is shown in preview interface.
Step 103, if receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained.
In actual applications, shooting instruction includes but is not limited to the operation that user clicks on shooting push button.
In embodiments of the present invention, by gathering normal exposure, overexposure, under-exposure three kinds of images, shooting image is synthesized.
Step 104, the image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.
In embodiments of the present invention, shooting image is obtained by second camera.In order that obtain what second camera obtained
Shooting image occurred without bright or crossed dark areas, captured multiple image by second camera, and synthesize shooting image.
In actual applications, the high dynamic range images of generation are preserved to the specified location for preserving picture and photo.
After preservation, shooting can be obtained into image is included in preview interface in the form of wicket.The embodiment of the present invention is to wicket
Size, position is not any limitation as.
After shooting image is preserved, shooting interface returns to preview interface.In embodiments of the present invention, the shooting of control first
Head carries out image preview, and controls second camera to carry out image taking；To the mistake in the image of first camera collection
Dark areas and overly bright region are handled, and are shown in preview interface；If receiving shooting instruction, second shooting is obtained
Head gathers the image of different exposure parameters；The image of the different exposure parameters is subjected to image synthesis, generates HDR
Image.Suspend preview interface during so as to solve to take pictures and show that the problem of influenceing preview interface normal use has reached not shadow
Ring the beneficial effect of preview interface normal use.
Reference picture 2, show a kind of step flow of the image pickup method of high dynamic range images of the embodiment of the present invention two
Figure, specifically may include steps of：
Step 201, image preview is carried out using the first camera with zigzag HDR camera function, and controlled
Second camera processed carries out image taking.
Wherein, taking the photograph with zigzag HDR shoot function (ZZ-HDR, ZigZag High Dynamic Range)
It as head, both can shoot to obtain common image when closing ZZ-HDR functions, can also be shot when opening ZZ-HDR functions
Obtain the image of the image of HDR, i.e. HDR.The imaging sensor of ZZ-HDR functions is the figure of special process
As sensor.
One sub-picture is divided into two parts by ZZ-HDR, and a part carries out growing exposure, and another part carries out short exposure.3A algorithms
By the brightness histogram of statistical picture, long exposure and the exposure value of short exposure are calculated respectively, then by long exposure and short exposure
The exposure value of light is sent to sensor side, realizes that single frames HDR is shot.Step 202, using local tone-mapping algorithm,
Brightness processed is carried out to the mistake dark areas in the image of first camera collection.
Wherein, LTM (Local Tone Mapping) function that local tone-mapping algorithm is provided by calling platform is real
It is existing, so that dark areas was not present in preview image.
Step 203, using automatic disturbance rejection controller algorithm, the overly bright region in the image of first camera collection is entered
Row brightness processed.
Wherein, ADRC (the Active Disturbance that automatic disturbance rejection controller algorithm is provided by calling platform
Rejection Controller) function realization, so that overly bright region is not present in preview image.
Step 204, will include by the image of above-mentioned local tone-mapping algorithm and automatic disturbance rejection controller algorithm process
Preview interface.
After being handled respectively mistake dark areas and overly bright region by step 202 and 203, obtained image is not present
Dark and overly bright region is crossed, so that the brightness of image seems evenly.
Step 205, if receiving shooting instruction, it is determined that normal exposure parameter, overexposure optical parameter and under-exposure parameter.
Wherein, normal exposure, overexposure and under-exposure parameter can be set according to practical application scene, the embodiment of the present invention
It is not any limitation as.
Step 206, according to the normal exposure parameter, overexposure optical parameter and under-exposure parameter, control second shooting
Head is shot respectively, is obtained normal exposure image, overexposure image and is owed to expose image.
Wherein, second camera can be common camera.Second camera synthesizes shooting image by multiple image, from
And ensure image high dynamic.
Step 207, the image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.
The embodiment of the present invention synthesizes shooting image by three two field pictures.In actual applications, three two field pictures are not limited to.
In actual applications, the high dynamic range images of generation are preserved into the external memory storage of mobile terminal.So as to
Photograph album application can access the image.It is appreciated that the specific path for preserving image needs to be set according to practical application scene.
Alternatively, in another embodiment of the invention, step 207 includes sub-step 2071 to 2073：
Sub-step 2071, for the overexposure region in the normal exposure image, corresponding in the deficient exposure image
Region is weighted processing.
Specifically, first, overexposure region is detected by pixel brightness value, wherein, overexposure when brightness value exceedes designated value；So
Afterwards, obtained according to location of pixels and owe to expose corresponding region in image；Finally, the pixel of correspondence position is weighted processing.
Alternatively, in another embodiment of the invention, sub-step 2071 includes sub-step 20711：
Sub-step 20711, for each pixel in the overexposure region in the normal exposure image, by the pixel
Brightness value and the deficient brightness value for exposing the pixel of same position in image are weighted average, obtain the new bright of the pixel
Angle value.
Specifically, the pixel brightness value of correspondence position can be added, and averaged.Further, it is also possible to pass through weighting
Overexposure region and the deficient weight for exposing corresponding region in image in parameter adjustment normal exposure image.For example, normal expose is set
The weighting parameters in the overexposure region in light image are P1, and the weighting parameters for owing to expose corresponding region in image are P2, then normal to expose
Pixel X1 in light image, and the corresponding pixel X2 for owing to expose correspondence position in image, weighted average formula is (P1*X1+P2*
X2)/2。
Sub-step 2072, for the deficient exposure region in the normal exposure image, corresponding in the overexposure image
Region is weighted processing.
Specifically, first, detected by pixel brightness value and owe to expose region, wherein, overexposure when brightness value is less than designated value；So
Afterwards, corresponding region in overexposure image is obtained according to location of pixels；Finally, the pixel of correspondence position is weighted processing.
It is appreciated that designated value here is different from the designated value for detecting overexposure, the designated value of overexposure is far smaller than detected.
Alternatively, in another embodiment of the invention, sub-step 2072 includes sub-step 20721：
Sub-step 20721, for each pixel in the deficient exposure region in the normal exposure image, by the pixel
The brightness value of the pixel of same position is weighted average in brightness value and the overexposure image, obtains the new bright of the pixel
Angle value.
The step is referred to the weighted average formula in sub-step 20711, will not be repeated here.
Sub-step 2073, by the overexposure region and the deficient normal exposure image determination for exposing region and being weighted after processing
For shooting image.
Specifically, the region of normal exposure in normal exposure image, be weighted processing after overexposure region and owe expose
Region, form shooting image.
In embodiments of the present invention, control the first camera to carry out image preview, and control second camera to carry out image
Shooting；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in preview circle
Face；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；By the different exposures
The image of parameter carries out image synthesis, generates high dynamic range images.Suspend preview interface during so as to solve to take pictures to show,
The problem of influenceing preview interface normal use, the beneficial effect for not influenceing preview interface normal use is reached.Further, it is also possible to
The image of different depth of exposures is got by second camera, and synthesizes shooting image, so as to ensure that shooting image will not go out
Existing darker or lighter region.
Reference picture 3, show a kind of structured flowchart of mobile terminal of the embodiment of the present invention three.
The mobile terminal 300 includes：Control module 301, preview display module 302, taking module 303, image synthesis
Module 304.
Be discussed in detail separately below each module function and each module between interactive relation.
Control module 301, for controlling the first camera to carry out image preview, and second camera is controlled to carry out image bat
Take the photograph.In embodiments of the present invention, above-mentioned control module 301, including：
First camera control submodule 3011, for being taken the photograph using first with zigzag HDR camera function
As head carries out image preview.
Preview display module 302, for the mistake dark areas and overly bright region in the image that is gathered to first camera
Handled, and be shown in preview interface.Alternatively, in embodiments of the present invention, above-mentioned preview display module 302, including：
Dark treatment submodule 3021 is crossed, for using local tone-mapping algorithm, to the figure of first camera collection
Mistake dark areas as in carries out brightness processed.
Bright processing submodule 3022 is crossed, for using automatic disturbance rejection controller algorithm, to the figure of first camera collection
Overly bright region as in carries out brightness processed.
Preview display sub-module 3023, for that will pass through at above-mentioned local tone-mapping algorithm and automatic disturbance rejection controller algorithm
The image of reason is shown in preview interface.
Taking module 303, if for receiving shooting instruction, obtain the second camera and gather different exposure parameters
Image.Alternatively, in embodiments of the present invention, above-mentioned taking module 303, including：
Exposure parameter determination sub-module 3031, for determining normal exposure parameter, overexposure optical parameter and under-exposure parameter.
Exposure image shooting submodule 3032, for according to the normal exposure parameter, overexposure optical parameter and under-exposure ginseng
Number, controls the second camera to be shot respectively, obtains normal exposure image, overexposure image and owes to expose image.
Image synthesis unit 304, for the image of the different exposure parameters to be carried out into image synthesis, generate high dynamic range
Enclose image.Alternatively, in embodiments of the present invention, above-mentioned image synthesis unit 304, including：
Overexposure handles submodule 3041, for for the overexposure region in the normal exposure image, using the deficient exposure
Corresponding region is weighted processing in image.
Owe to expose processing submodule 3042, for for the deficient exposure region in the normal exposure image, using the overexposure
Corresponding region is weighted processing in image.
Image determination sub-module 3043 is normal after handling for the overexposure region and deficient exposure region to be weighted
Exposure image is defined as shooting image.
Alternatively, in another embodiment of the invention, above-mentioned overexposure processing submodule 3041, including：
Overexposure brightness averaging unit, for for each pixel in the overexposure region in the normal exposure image, inciting somebody to action
The brightness value of the pixel and the deficient brightness value for exposing the pixel of same position in image are weighted averagely, obtain the picture
The new brightness value of element.
Alternatively, in another embodiment of the invention, above-mentioned deficient expose handles submodule 3042, including：
Owe to expose brightness averaging unit, for for each pixel in the deficient exposure region in the normal exposure image, inciting somebody to action
The brightness value of the pixel of same position is weighted average in the brightness value of the pixel and the overexposure image, obtains the picture
The new brightness value of element.
In embodiments of the present invention, control the first camera to carry out image preview, and control second camera to carry out image
Shooting；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in preview circle
Face；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；By the different exposures
The image of parameter carries out image synthesis, generates high dynamic range images.Suspend preview interface during so as to solve to take pictures to show,
The problem of influenceing preview interface normal use, the beneficial effect for not influenceing preview interface normal use is reached.Further, it is also possible to
The image of different depth of exposures is got by second camera, and synthesizes shooting image, so as to ensure that shooting image will not go out
Existing darker or lighter region.
Embodiment three is device embodiment corresponding to embodiment of the method two, and detailed description is referred to embodiment two, herein
Repeat no more.
Reference picture 4, show a kind of structured flowchart of mobile terminal of the embodiment of the present invention four.
Mobile terminal 400 shown in Fig. 4 includes：At least one processor 401, memory 402, at least one network interface
404 and user interface 403, the first camera 406 and second camera 407.Each component in mobile terminal 400 passes through total
Linear system system 405 is coupled.It is understood that bus system 405 is used to realize the connection communication between these components.Bus system
405 in addition to including data/address bus, in addition to power bus, controlling bus and status signal bus in addition.But for clear explanation
For the sake of, various buses are all designated as bus system 405 in Fig. 4.
Wherein, user interface 403 can include display, keyboard or pointing device (for example, mouse, trace ball
(trackball), touch-sensitive plate or touch-screen etc..
It is appreciated that the memory 402 in the embodiment of the present invention can be volatile memory or nonvolatile memory,
Or it may include both volatibility and nonvolatile memory.Wherein, nonvolatile memory can be read-only storage (Read-
OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), Erasable Programmable Read Only Memory EPROM
(ErasablePROM, EPROM), Electrically Erasable Read Only Memory (ElectricallyEPROM, EEPROM) dodge
Deposit.Volatile memory can be random access memory (RandomAccessMemory, RAM), and it is used as outside slow at a high speed
Deposit.By exemplary but be not restricted explanation, the RAM of many forms can use, such as static RAM
(StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), Synchronous Dynamic Random Access Memory
(SynchronousDRAM, SDRAM), double data speed synchronous dynamic RAM (DoubleDataRate
SDRAM, DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links
Dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct rambus random access memory
(DirectRambusRAM, DRRAM).The memory 402 of the system and method for description of the embodiment of the present invention is intended to include but unlimited
In these memories with any other suitable type.
In some embodiments, memory 402 stores following element, can perform module or data structure, or
Their subset of person, or their superset：Operating system 4021 and application program 4022.
Wherein, operating system 4021, comprising various system programs, such as ccf layer, core library layer, driving layer etc., it is used for
Realize various basic businesses and the hardware based task of processing.Application program 4022, include various application programs, such as media
Player (MediaPlayer), browser (Browser) etc., for realizing various applied business.Realize embodiment of the present invention side
The program of method may be embodied in application program 4022.
In embodiments of the present invention, by calling program or the instruction of the storage of memory 402, specifically, can be application
The program stored in program 4022 or instruction, processor 401 is used to control the first camera to carry out image preview, and controls second
Camera carries out image taking；Mistake dark areas in the image of first camera collection and overly bright region are handled,
And it is shown in preview interface；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；
The image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.The embodiments of the present invention disclose
Method can apply in processor 401, or realized by processor 401.Processor 401 is probably a kind of ic core
Piece, there is the disposal ability of signal.In implementation process, each step of the above method can pass through the hardware in processor 401
Integrated logic circuit or software form instruction complete.Above-mentioned processor 401 can be general processor, data signal
Processor (DigitalSignalProcessor, DSP), application specific integrated circuit
(ApplicationSpecificIntegratedCircuit, ASIC), ready-made programmable gate array
(FieldProgrammableGateArray, FPGA) either other PLDs, discrete gate or transistor logic
Device, discrete hardware components.It can realize or perform disclosed each method, step and the box in the embodiment of the present invention
Figure.General processor can be microprocessor or the processor can also be any conventional processor etc..With reference to the present invention
The step of method disclosed in embodiment, can be embodied directly in hardware decoding processor and perform completion, or use decoding processor
In hardware and software module combination perform completion.Software module can be located at random access memory, and flash memory, read-only storage can
In the ripe storage medium in this area such as program read-only memory or electrically erasable programmable memory, register.The storage
Medium is located at memory 402, and processor 401 reads the information in memory 402, and the step of the above method is completed with reference to its hardware
Suddenly.
It is understood that the embodiment of the present invention description these embodiments can use hardware, software, firmware, middleware,
Microcode or its combination are realized.Realized for hardware, processing unit can be realized in one or more application specific integrated circuits
(ApplicationSpecificIntegratedCircuits, ASIC), digital signal processor
(DigitalSignalProcessing, DSP), digital signal processing appts (DSPDevice, DSPD), programmable logic device
(ProgrammableLogicDevice, PLD), field programmable gate array (Field-ProgrammableGateArray,
FPGA), general processor, controller, microcontroller, microprocessor, other electronics lists for performing herein described function
In member or its combination.
For software realize, can by perform the module (such as process, function etc.) of function described in the embodiment of the present invention come
Realize the technology described in the embodiment of the present invention.Software code is storable in memory and passes through computing device.Memory can
To realize within a processor or outside processor.
Alternatively, processor 401 be additionally operable to realize mistake dark areas in image gather to first camera with
Overly bright region is handled, and when being shown in preview interface, using local tone-mapping algorithm, first camera is gathered
Image in mistake dark areas carry out brightness processed；Using automatic disturbance rejection controller algorithm, to the figure of first camera collection
Overly bright region as in carries out brightness processed；By by above-mentioned local tone-mapping algorithm and automatic disturbance rejection controller algorithm process
Image is shown in preview interface..
Alternatively, processor 401, which is additionally operable to realize, is obtaining the image of the different exposure parameters of the second camera collection
When, determine normal exposure parameter, overexposure optical parameter and under-exposure parameter；According to the normal exposure parameter, overexposure optical parameter and
Under-exposure parameter, control the second camera to be shot respectively, obtain normal exposure image, overexposure image and deficient exposure figure
Picture.
Alternatively, processor 401 is additionally operable to realize when the image of the different exposure parameters is carried out into image synthesis, right
Overexposure region in the normal exposure image, processing is weighted using corresponding region in the deficient exposure image；For
Deficient exposure region in the normal exposure image, processing is weighted using corresponding region in the overexposure image；By described in
The normal exposure image that overexposure region and deficient exposure region are weighted after processing is defined as shooting image.
Alternatively, processor 401 is additionally operable to real now for the overexposure region in the normal exposure image, using described
When corresponding region is weighted processing in deficient exposure image, for each picture in the overexposure region in the normal exposure image
Element, the brightness value of the pixel and the deficient brightness value for exposing the pixel of same position in image are weighted averagely, obtained
The new brightness value of the pixel.
Alternatively, processor 401 is additionally operable to real now for the deficient exposure region in the normal exposure image, using described
When corresponding region is weighted processing in overexposure image, for each picture in the deficient exposure region in the normal exposure image
Element, the brightness value of the pixel of same position in the brightness value of the pixel and the overexposure image is weighted averagely, obtained
The new brightness value of the pixel.
Alternatively, processor 401 be additionally operable to realize control the first camera carry out image preview when, using with word
First camera of shape HDR camera function carries out image preview.
It can be seen that in embodiments of the present invention, the first camera of control carries out image preview, and controls second camera to carry out
Image taking；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in pre-
Look at interface；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；By the difference
The image of exposure parameter carries out image synthesis, generates high dynamic range images.Suspend preview interface during so as to solve to take pictures
It has been shown that, the problem of influenceing preview interface normal use, the beneficial effect for not influenceing preview interface normal use is reached.In addition,
The image of different depth of exposures can also be got by second camera, and synthesize shooting image, so as to ensure shooting image
It is not in darker or lighter region.
Fig. 5 shows the structural representation of the mobile terminal of the embodiment of the present invention five.
The mobile terminal of the embodiment of the present invention can be mobile phone, tablet personal computer, personal digital assistant
(PersonalDigital Assistant, PDA) or vehicle-mounted computer etc..
Mobile terminal in Fig. 5 includes radio frequency (RadioFrequency, RF) circuit 510, memory 520, input block
530th, display unit 540, processor 560, voicefrequency circuit 570, WiFi (WirelessFidelity) module 580, power supply 590,
First camera 561, second camera 562.
Wherein, input block 530 can be used for the numeral or character information for receiving user's input, and generation and mobile terminal
The signal input that 500 user is set and function control is relevant.Specifically, in the embodiment of the present invention, the input block 530 can
With including contact panel 531.Contact panel 531, also referred to as touch-screen, collect touch operation of the user on or near it
(for example user uses the operations of any suitable object or annex on contact panel 531 such as finger, stylus), and according to advance
The formula of setting drives corresponding attachment means.Optionally, contact panel 531 may include touch detecting apparatus and touch controller
Two parts.Wherein, the touch orientation of touch detecting apparatus detection user, and the signal that touch operation is brought is detected, by signal
Send touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate,
Give the processor 560 again, and the order sent of reception processing device 560 and can be performed.Furthermore, it is possible to using resistance-type,
The polytypes such as condenser type, infrared ray and surface acoustic wave realize contact panel 531.Except contact panel 531, input block
530 can also include other input equipments 532, and other input equipments 532 can include but is not limited to physical keyboard, function key
One or more in (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..
Wherein, display unit 540 can be used for display by the information of user's input or be supplied to information and the movement of user
The various menu interfaces of terminal 500.Display unit 540 may include display panel 541, optionally, can use LCD or organic hairs
The forms such as optical diode (OrganicLight-EmittingDiode, OLED) configure display panel 541.
It should be noted that contact panel 531 can cover display panel 541, touch display screen is formed, when the touch display screen is examined
After measuring the touch operation on or near it, processor 560 is sent to determine the type of touch event, is followed by subsequent processing device
560 provide corresponding visual output according to the type of touch event in touch display screen.
Touch display screen includes Application Program Interface viewing area and conventional control viewing area.The Application Program Interface viewing area
And arrangement mode of the conventional control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious
Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with
The interface element such as the icon comprising at least one application program and/or widget desktop controls.The Application Program Interface viewing area
It can also be the empty interface not comprising any content.The conventional control viewing area is used to show the higher control of utilization rate, for example,
Application icons such as settings button, interface numbering, scroll bar, phone directory icon etc..
Wherein processor 560 is the control centre of mobile terminal 500, utilizes various interfaces and connection whole mobile phone
Various pieces, by running or performing the software program and/or module that are stored in first memory 521, and call storage
Data in second memory 522, the various functions and processing data of mobile terminal 500 are performed, so as to mobile terminal 500
Carry out integral monitoring.Optionally, processor 560 may include one or more processing units.
In embodiments of the present invention, by call store the first memory 521 in software program and/or module and/
Or the data in the second memory 522, processor 560 is used to control the first camera to carry out image preview, and controls second
Camera carries out image taking；Mistake dark areas in the image of first camera collection and overly bright region are handled,
And it is shown in preview interface；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；
The image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.
Alternatively, processor 560 be additionally operable to realize mistake dark areas in image gather to first camera with
Overly bright region is handled, and when being shown in preview interface, using local tone-mapping algorithm, first camera is gathered
Image in mistake dark areas carry out brightness processed；Using automatic disturbance rejection controller algorithm, to the figure of first camera collection
Overly bright region as in carries out brightness processed；By by above-mentioned local tone-mapping algorithm and automatic disturbance rejection controller algorithm process
Image is shown in preview interface..
Alternatively, processor 560, which is additionally operable to realize, is obtaining the image of the different exposure parameters of the second camera collection
When, determine normal exposure parameter, overexposure optical parameter and under-exposure parameter；According to the normal exposure parameter, overexposure optical parameter and
Under-exposure parameter, control the second camera to be shot respectively, obtain normal exposure image, overexposure image and deficient exposure figure
Picture.
Alternatively, processor 560 is additionally operable to realize when the image of the different exposure parameters is carried out into image synthesis, right
Overexposure region in the normal exposure image, processing is weighted using corresponding region in the deficient exposure image；For
Deficient exposure region in the normal exposure image, processing is weighted using corresponding region in the overexposure image；By described in
The normal exposure image that overexposure region and deficient exposure region are weighted after processing is defined as shooting image.
Alternatively, processor 560 is additionally operable to real now for the overexposure region in the normal exposure image, using described
When corresponding region is weighted processing in deficient exposure image, for each picture in the overexposure region in the normal exposure image
Element, the brightness value of the pixel and the deficient brightness value for exposing the pixel of same position in image are weighted averagely, obtained
The new brightness value of the pixel.
Alternatively, processor 560 is additionally operable to real now for the deficient exposure region in the normal exposure image, using described
When corresponding region is weighted processing in overexposure image, for each picture in the deficient exposure region in the normal exposure image
Element, the brightness value of the pixel of same position in the brightness value of the pixel and the overexposure image is weighted averagely, obtained
The new brightness value of the pixel.
Alternatively, processor 560 be additionally operable to realize control the first camera carry out image preview when, using with word
First camera of shape HDR camera function carries out image preview.
It can be seen that in embodiments of the present invention, the first camera of control carries out image preview, and controls second camera to carry out
Image taking；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in pre-
Look at interface；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；By the difference
The image of exposure parameter carries out image synthesis, generates high dynamic range images.Suspend preview interface during so as to solve to take pictures
It has been shown that, the problem of influenceing preview interface normal use, the beneficial effect for not influenceing preview interface normal use is reached.In addition,
The image of different depth of exposures can also be got by second camera, and synthesize shooting image, so as to ensure shooting image
It is not in darker or lighter region.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, it is related
Part illustrates referring to the part of embodiment of the method.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
Algorithm and display be not inherently related to any certain computer, virtual system or miscellaneous equipment provided herein.
Various general-purpose systems can also be used together with teaching based on this.As described above, required by constructing this kind of system
Structure be obvious.In addition, the present invention is not also directed to any certain programmed language.It should be understood that it can utilize various
Programming language realizes the content of invention described herein, and the description done above to language-specific is to disclose this hair
Bright preferred forms.
In the specification that this place provides, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect,
Above in the description to the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：I.e. required guarantor
The application claims of shield features more more than the feature being expressly recited in each claim.It is more precisely, such as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following embodiment are expressly incorporated in the embodiment, wherein each claim is in itself
Separate embodiments all as the present invention.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, summary and accompanying drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included some features rather than further feature, but the combination of the feature of different embodiments means in of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
One of meaning mode can use in any combination.
The all parts embodiment of the present invention can be realized with hardware, or to be run on one or more processor
Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that it can use in practice
Microprocessor or digital signal processor (DSP) come realize in mobile terminal device according to embodiments of the present invention some or
The some or all functions of person's whole part.The present invention is also implemented as perform method as described herein one
Divide either whole equipment or program of device (for example, computer program and computer program product).It is such to realize this hair
Bright program can store on a computer-readable medium, or can have the form of one or more signal.It is such
Signal can be downloaded from internet website and obtained, and either provided on carrier signal or provided in the form of any other.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and being come by means of properly programmed computer real
It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch
To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame
Claim.
Those of ordinary skill in the art it is to be appreciated that with reference to disclosed in the embodiment of the present invention embodiment description it is each
The unit and algorithm steps of example, it can be realized with the combination of electronic hardware or computer software and electronic hardware.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
In embodiment provided herein, it should be understood that disclosed apparatus and method, others can be passed through
Mode is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, is only
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, device or unit
Connect, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (16)
- A kind of 1. image pickup method of high dynamic range images, applied to mobile terminal, it is characterised in that methods described includes：Control the first camera to carry out image preview, and control second camera to carry out image taking；Mistake dark areas in the image of first camera collection and overly bright region are handled, and are shown in preview circle Face；If receiving shooting instruction, the image that the second camera gathers different exposure parameters is obtained；The image of the different exposure parameters is subjected to image synthesis, generates high dynamic range images.
- 2. according to the method for claim 1, it is characterised in that the mistake in the image to first camera collection Dark areas and overly bright region are handled, and the step of be shown in preview interface, including：Using local tone-mapping algorithm, brightness processed is carried out to the mistake dark areas in the image of first camera collection；Using automatic disturbance rejection controller algorithm, brightness processed is carried out to the overly bright region in the image of first camera collection；It will include by the image of above-mentioned local tone-mapping algorithm and automatic disturbance rejection controller algorithm process in preview interface.
- 3. according to the method for claim 1, it is characterised in that described to obtain the different exposure ginsengs of the second camera collection The step of several image, including：Determine normal exposure parameter, overexposure optical parameter and under-exposure parameter；According to the normal exposure parameter, overexposure optical parameter and under-exposure parameter, the second camera is controlled to be clapped respectively Take the photograph, obtain normal exposure image, overexposure image and owe to expose image.
- 4. according to the method for claim 3, it is characterised in that the image by the different exposure parameters carries out image The step of synthesis, including：For the overexposure region in the normal exposure image, place is weighted using corresponding region in the deficient exposure image Reason；For the deficient exposure region in the normal exposure image, place is weighted using corresponding region in the overexposure image Reason；The normal exposure image that the overexposure region and deficient exposure region are weighted after processing is defined as shooting image.
- 5. according to the method for claim 4, it is characterised in that the overexposure area in the normal exposure image Domain, using it is described it is deficient exposure image in corresponding region be weighted processing the step of, including：For each pixel in the overexposure region in the normal exposure image, by the brightness value of the pixel and the deficient exposure The brightness value of the pixel of same position is weighted average in image, obtains the new brightness value of the pixel.
- 6. according to the method for claim 4, it is characterised in that described for the normal exposure image Zhong Qianbao areas Domain, the step of processing is weighted using corresponding region in the overexposure image, including：For each pixel in the deficient exposure region in the normal exposure image, by the brightness value of the pixel and the overexposure The brightness value of the pixel of same position is weighted average in image, obtains the new brightness value of the pixel.
- 7. according to the method described in claim 1 to 6 any of which item, it is characterised in that the first camera of the control is carried out The step of image preview, including：Image preview is carried out using the first camera with zigzag HDR camera function.
- A kind of 8. mobile terminal, it is characterised in that including：Control module, for controlling the first camera to carry out image preview, and second camera is controlled to carry out image taking；Preview display module, at the mistake dark areas and overly bright region in the image that is gathered to first camera Reason, and it is shown in preview interface；Taking module, if for receiving shooting instruction, obtain the image that the second camera gathers different exposure parameters；Image synthesis unit, for the image of the different exposure parameters to be carried out into image synthesis, generate high dynamic range images.
- 9. mobile terminal according to claim 8, it is characterised in that the preview display module, including：Dark treatment submodule is crossed, for using local tone-mapping algorithm, to the mistake in the image of first camera collection Dark areas carries out brightness processed；Bright processing submodule is crossed, for using automatic disturbance rejection controller algorithm, to the mistake in the image of first camera collection Bright area carries out brightness processed；Preview display sub-module, for by by the image of above-mentioned local tone-mapping algorithm and automatic disturbance rejection controller algorithm process It is shown in preview interface.
- 10. mobile terminal according to claim 8, it is characterised in that the taking module, including：Exposure parameter determination sub-module, for determining normal exposure parameter, overexposure optical parameter and under-exposure parameter；Exposure image shooting submodule, for according to the normal exposure parameter, overexposure optical parameter and under-exposure parameter, controlling institute State second camera to be shot respectively, obtain normal exposure image, overexposure image and owe to expose image.
- 11. mobile terminal according to claim 10, it is characterised in that described image synthesis module, including：Overexposure handles submodule, for for the overexposure region in the normal exposure image, using right in the deficient exposure image The region answered is weighted processing；Owe to expose processing submodule, for for the deficient exposure region in the normal exposure image, using right in the overexposure image The region answered is weighted processing；Image determination sub-module, for the normal exposure image being weighted the overexposure region and deficient exposure region after processing It is defined as shooting image.
- 12. mobile terminal according to claim 11, it is characterised in that the overexposure handles submodule, including：Overexposure brightness averaging unit, for for each pixel in the overexposure region in the normal exposure image, will described in The brightness value of pixel and the deficient brightness value for exposing the pixel of same position in image are weighted averagely, obtain the pixel New brightness value.
- 13. mobile terminal according to claim 11, it is characterised in that deficient expose handles submodule, including：Owe to expose brightness averaging unit, for for each pixel in the deficient exposure region in the normal exposure image, will described in The brightness value of the pixel of same position is weighted average in the brightness value of pixel and the overexposure image, obtains the pixel New brightness value.
- 14. according to the mobile terminal described in claim 8 to 13 any of which item, it is characterised in that the control module, bag Include：First camera control submodule, for being carried out using the first camera with zigzag HDR camera function Image preview.
- 15. a kind of mobile terminal, it is characterised in that including processor, memory and be stored on the memory and can be in institute The computer program run on processor is stated, the computer program is realized such as claim 1 to 7 during the computing device The step of image pickup method of high dynamic range images described in any one.
- 16. a kind of computer-readable recording medium, it is characterised in that be stored with computer on the computer-readable recording medium Program, the HDR figure as any one of claim 1 to 7 is realized when the computer program is executed by processor The step of image pickup method of picture.
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| CN108337446A (en) * | 2018-04-12 | 2018-07-27 | Oppo广东移动通信有限公司 | High-dynamic-range image acquisition method, device based on dual camera and equipment |
| CN108337445A (en) * | 2018-03-26 | 2018-07-27 | 华为技术有限公司 | Photographic method, relevant device and computer storage media |
| CN108449541A (en) * | 2018-03-12 | 2018-08-24 | 维沃移动通信有限公司 | A kind of panoramic picture image pickup method and mobile terminal |
| CN109756680A (en) * | 2019-01-30 | 2019-05-14 | Oppo广东移动通信有限公司 | Image composition method, device, electronic equipment and readable storage medium storing program for executing |
| CN111953893A (en) * | 2020-06-30 | 2020-11-17 | 普联技术有限公司 | High dynamic range image generation method, terminal device and storage medium |
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| CN115134511A (en) * | 2021-03-29 | 2022-09-30 | 北京小米移动软件有限公司 | High dynamic range image photographing method and device and storage medium |
| CN113099123A (en) * | 2021-04-07 | 2021-07-09 | 中煤科工集团重庆研究院有限公司 | High dynamic range video image acquisition method |
| CN116916148A (en) * | 2023-05-15 | 2023-10-20 | 荣耀终端有限公司 | Image processing method and electronic equipment |
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