CN108322651A - Image pickup method and device, electronic equipment, computer readable storage medium - Google Patents
Image pickup method and device, electronic equipment, computer readable storage medium Download PDFInfo
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- CN108322651A CN108322651A CN201810143217.6A CN201810143217A CN108322651A CN 108322651 A CN108322651 A CN 108322651A CN 201810143217 A CN201810143217 A CN 201810143217A CN 108322651 A CN108322651 A CN 108322651A
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- acquisition parameters
- photographed scene
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
Abstract
This application involves a kind of image pickup method and device, electronic equipment, computer readable storage medium, which includes：Obtain the ambient brightness of photographed scene；The first acquisition parameters are determined by the first control circuit of phase focusing pixel according to the ambient brightness；According to first acquisition parameters, is focused to the photographed scene by phase focusing pixel, determine the focal length of the photographed scene；The second acquisition parameters are determined by the second control circuit of imaging pixel according to the ambient brightness；The photographed scene is shot according to the focal length and the second acquisition parameters, generates the image of the photographed scene.By above-mentioned image pickup method and device, electronic equipment, computer readable storage medium, the applicability of phase focusing mode can be improved.
Description
Technical field
This application involves technical field of image processing, more particularly to a kind of image pickup method and device, electronic equipment, calculating
Machine readable storage medium storing program for executing.
Background technology
Shooting function is a very important function on mobile terminal.With the development of technique for taking, using mobile whole
In shooting process, the requirement to focusing is also higher and higher at end.
Phase-detection auto-focusing (phase detection auto focus, PDAF, the focusing of abbreviation phase) method is
A method of quick and precisely focusing based on phase-detection, however in conventional method, using PDAF to shooting environmental have compared with
High requirement only could accurately be focused in the case where bright range is proper using PDAF, and when environment is too dark
Or when too bright, then on the contrary PDAF can not work, or focusing is inaccurate.Therefore, traditional to be had using the image pickup method of PDAF
It is to be modified.
Invention content
A kind of image pickup method of the embodiment of the present application offer, device, electronic equipment, computer readable storage medium, Ke Yiti
The applicability that height is shot using PDAF.
A kind of image pickup method, including：
Obtain the ambient brightness of photographed scene；
The first acquisition parameters are determined by the first control circuit of phase focusing pixel according to the ambient brightness；
According to first acquisition parameters, is focused, determined to the photographed scene by phase focusing pixel
The focal length of the photographed scene；
The second acquisition parameters are determined by the second control circuit of imaging pixel according to the ambient brightness；
The photographed scene is shot according to the focal length and the second acquisition parameters, generates the figure of the photographed scene
Picture.
A kind of filming apparatus, described device include：
Environment information acquisition module, the ambient brightness for obtaining photographed scene；
First shooting parameter determination module, the first control electricity for pixel of being focused by phase according to the ambient brightness
Road determines the first acquisition parameters；
Focusing module, for according to first acquisition parameters, pixel to be focused to the photographed scene by the phase
It focuses, determines the focal length of the photographed scene；
Second shooting parameter determination module, for true by the second control circuit of imaging pixel according to the ambient brightness
Fixed second acquisition parameters；
Image generation module, it is raw for being shot to the photographed scene according to the focal length and the second acquisition parameters
At the image of the photographed scene.
A kind of electronic equipment, including memory and processor store computer program, the calculating in the memory
When machine program is executed by the processor so that the processor executes the step of the image pickup method in the application any embodiment
Suddenly.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
The step of image pickup method in the application any embodiment is realized when row.
Above-mentioned image pickup method and device, electronic equipment, computer readable storage medium are focused pixel by being directed to phase
Provided with first control circuit, it is provided with second control circuit for imaging pixel, and then can be according to the environment of photographed scene
Brightness determines the first acquisition parameters of pixel utilization of focusing suitable for phase by first control circuit.It is compared to tradition
All pixels in method share a control circuit to generate acquisition parameters, and identified acquisition parameters be generally applicable in
The parameter of imaging pixel has larger limitation to the use of phase focusing pixel.The application by the first control circuit,
So that the first acquisition parameters generated are only used for the use of phase focusing pixel, do not interfered by imaging pixel, to improve
The validity of identified first acquisition parameters, improve phase focusing pixel using the first acquisition parameters focus it is fast
Speed.The limitation focused using phase focusing method is reduced, the applicability of phase focusing method is improved.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the applied environment figure of image pickup method in one embodiment；
Fig. 2 is the configuration diagram of electronic equipment in one embodiment；
Fig. 3 is the flow chart of image pickup method in one embodiment；
Fig. 4 is the schematic diagram of shooting environmental in one embodiment；
Fig. 5 is to be shot to photographed scene according to focal length and the second acquisition parameters in one embodiment, generates shooting field
The flow chart of the image of scape；
Fig. 6 is the sequence diagram of image pickup method in another embodiment；
Fig. 7 is the structure diagram of filming apparatus in one embodiment；
Fig. 8 is the structure diagram of image generation module in one embodiment；
Fig. 9 is the schematic diagram of image processing circuit in one embodiment.
Specific implementation mode
It is with reference to the accompanying drawings and embodiments, right in order to make the object, technical solution and advantage of the application be more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
It is appreciated that term " first " used in this application, " second " etc. can be used to describe herein various elements,
But these elements should not be limited by these terms.These terms are only used to distinguish first element and another element.Citing comes
It says, in the case where not departing from scope of the present application, the first acquisition parameters can be known as the second acquisition parameters, and similarly,
Second acquisition parameters can be known as the first acquisition parameters.First acquisition parameters and the second acquisition parameters both acquisition parameters,
But it is not same acquisition parameters.
Fig. 1 is the application environment schematic diagram of image pickup method in one embodiment.As shown in Figure 1, the application environment includes electricity
Sub- equipment and photographed scene 120.The electronic equipment 110 can be terminal, including but not limited to mobile terminal, wearable device or take the photograph
Camera etc. can carry out the arbitrary electronic equipment of image taking.Electronic equipment 110 can call camera thereon to be shot.It should
It may include the first camera module and second camera module in camera.Electronic equipment can call any one or more camera shootings
Head mould group is shot.Wherein, there are multiple pixels, the pixel may include the phase for focusing in each camera module
Position focusing pixel and the imaging pixel for imaging.Electronic equipment is further provided with for independent control phase focusing pixel
First control circuit, and provided with the second control circuit for controlling imaging pixel.And it can be according to the ring of photographed scene 120
Border brightness focuses to photographed scene 120 by the first control circuit and phase focusing pixel, determines photographed scene 120
Focal length；The second acquisition parameters are determined by the second control circuit of imaging pixel according to ambient brightness, then by the second count
It takes the photograph parameter and focal length generates the image of photographed scene 120.
Fig. 2 is the internal structure schematic diagram of electronic equipment in one embodiment.As shown in Fig. 2, the electronic equipment includes logical
Cross the processor, memory, display screen and camera of system bus connection.Wherein, which calculates and controls for providing
Ability supports the operation of entire electronic equipment.Memory for storing data, program etc., at least one meter is stored on memory
Calculation machine program, the computer program can be executed by processor, to realize that is provided in the embodiment of the present application is suitable for electronic equipment
Image pickup method.Memory may include that magnetic disc, CD, read-only memory (Read-Only Memory, ROM) etc. are non-volatile
Property storage medium or random access memory (Random-Access-Memory, RAM) etc..For example, in one embodiment,
Memory includes non-volatile memory medium and built-in storage.Non-volatile memory medium is stored with operating system and computer journey
Sequence.The computer program can be performed by processor, for a kind of realization image pickup method that each embodiment is provided below.
Built-in storage provides the running environment of cache for the operating system computer program in non-volatile memory medium.Camera
Including above-mentioned the first camera module and second camera module, it is used equally for generating image.Display screen can be touch screen,
For example be capacitance plate or electrical screen, the visual informations such as image for show shooting may be utilized for detection and act on this showing
The touch operation of display screen generates corresponding instruction.
It will be understood by those skilled in the art that structure shown in Figure 2, is only tied with the relevant part of application scheme
The block diagram of structure, does not constitute the restriction for the electronic equipment being applied thereon to application scheme, and specific electronic equipment can be with
Including than more or fewer components as shown in the figure, either combining certain components or being arranged with different components.
In one embodiment, as shown in figure 3, providing a kind of image pickup method, the present embodiment is mainly applied in this way
It is illustrated in electronic equipment as shown in Figure 1, the method comprising the steps of 302 to step 310.
Step 302, the ambient brightness of photographed scene is obtained.
Ambient brightness indicates the brightness of photographed scene, such as the intensity of illumination of photographed scene.The ring of different photographed scenes
Border brightness is different, and the ambient brightness of the shooting volume scene such as under sunlight is more than the ambient brightness of the photographed scene at cloudy day,
And the ambient brightness of the photographed scene at cloudy day is then more than the ambient brightness of the photographed scene at night.
Electronic equipment can call the photosensitive element in camera module to detect the ambient brightness in photographed scene.Such as
The light in photographed scene can be detected according to the photosensitive element to irradiate into the brightness size in camera, according to the brightness detected
Size determines the ambient brightness of photographed scene.
In one embodiment, the ambient brightness on the region of different photographed scenes is also not necessarily identical.Than if any area
Ambient brightness numerical value on domain is larger, and the ambient brightness numerical value on some regions is smaller, electronic equipment can reception irradiate into
While brightness size in camera, the region of the photographed scene corresponding to the brightness can be further identified, to identify
Go out the ambient brightness of each region in photographed scene.
Step 304, the first acquisition parameters are determined by the first control circuit of phase focusing pixel according to ambient brightness.
It is provided with the pixel of dot matrix distribution in the camera module of electronic equipment, phase focusing pixel is contained in the pixel
With the imaging pixel for imaging.Phase focusing pixel is that one kind reserving some masking pixels on the image sensor, is used
Carry out the pixel of phase-detection, phase pixel of focusing is typically exist in pairs, and electronic equipment passes through pairs of phase and focuses picture
The distance between element and its variation etc. determine the deviant of focusing to realize accurate focusing.
Electronic equipment has carried out separate cabling for the phase focusing pixel in the pixel of dot matrix distribution, and setting is for independent
The control circuit of phase focusing pixel, i.e. first control circuit, and for the imaging pixel of non-phase focusing pixel, also independently set
Control circuit, i.e. second control circuit are set.
First shooting parameter list shows when carrying out phase focusing, passes through the parameter that first control circuit exports.First count
The numerical value for taking the photograph parameter is in when being focused suitable for phase focusing pixel within the scope of used Effective Numerical.In a reality
It applies in example, the first acquisition parameters include the first exposure time focused for phase and the first gain.First exposure time indicates
During phase focusing pixel is focused, in order to project light onto the photosurface of the photosensitive material in camera module
On, the duration to be opened of shutter.First exposure time is bigger, into light just it is more.Half-light is more than the exposure time needed for situation
Greatly.The electric signal that first gain represents first control circuit output can make corresponding phase focusing pixel focus
During can be effectively in use, amplification factor to the input signal.It may include corresponding automatic increasing in first control circuit
Benefit control (automatic gain control, AGC) circuit, corresponding first gain is determined by the agc circuit.First
Gain and corresponding ambient brightness negative correlation, when ambient brightness makes more greatly, then corresponding first gain is smaller.
Step 306, it according to the first acquisition parameters, is focused to photographed scene by phase focusing pixel, determines shooting
The focal length of scene.
Electronic equipment is corresponding by phase focusing pixel generation photographed scene according to the first acquisition parameters generated
Phase information.According to the phase information that pairs of phase focusing pixel can detect respectively, corresponding phase difference is calculated, according to
The phasometer calculates the direction moved needed for focus lens and displacement distance, is focused to photographed scene to realize, really
Surely the focal length of the photographed scene is shot.
Optionally, it may be selected to focus to the arbitrary region in photographed scene, the region of focusing can be according to scene
The region for identifying and automatically determining can also be the region of the operational order according to user and determination.For example focusing area can be to clap
The intermediate region in scene is taken the photograph, can be either shooting main body in the photographed scene identified or can also be according to user couple
The focusing area of the click location of the display interface of shooting picture and determination is presented.
Step 308, the second acquisition parameters are determined by the second control circuit of imaging pixel according to ambient brightness.
Imaging pixel indicates the pixel for carrying out normal photographing imaging in the pixel that dot matrix is distributed.Second shooting parameter list
When showing using imaging pixel shooting imaging, pass through the parameter that second control circuit exports.For the environment of identical photographed scene
Brightness, the first acquisition parameters by first control circuit determination and the second control parameter by second control circuit determination
Numerical value simultaneously differs.
In one embodiment, when the second acquisition parameters can equally include that second be imaged for imaging pixel exposes
Long and the second gain.First exposure time indicates during the imaging pixel is imaged, in order to project light onto camera shooting
On the photosurface of photosensitive material in head mould group, the duration to be opened of shutter.Second exposure time is bigger, into light just it is more.
Half-light is than the exposure time bigger needed for situation.The electric signal that second gain represents second control circuit output can make phase
The imaging pixel answered can be effectively in use, amplification factor to the input signal during being imaged.Second control electricity
May include corresponding automatic growth control (automatic gain control, AGC) circuit in road, by the agc circuit come
Determine corresponding second gain.Second gain and corresponding ambient brightness are negatively correlated, when ambient brightness makes more greatly, then corresponding the
Two gains are smaller.Although the first acquisition parameters and the second acquisition parameters contain the parameter of same physical meaning, the two
Parameter values simultaneously differ, and the first acquisition parameters are the parameters that use when being focused for phase focusing pixel, and second
Acquisition parameters are the parameters of determination when imaging pixel is imaged.
Step 310, photographed scene is shot according to focal length and the second acquisition parameters, generates the image of photographed scene.
Electronic equipment can under determining focal length, by the imaging pixel under second acquisition parameters to photographed scene into
Row shooting is generated the imaging datas such as brightness value or the gray value of photographed scene corresponding position by each imaging pixel, according to this
Imaging data generates the image of photographed scene.For example, each imaging pixel in electronic equipment can be according to second shooting
Parameter and focal length generate the color component on corresponding color channel.Wherein, which can be by RGB (three kinds of red, green, blues
Color) triple channel constitute, can also be is made of HSV (tone, saturation degree and lightness) triple channel, can also be by CMY (blueness,
Fuchsin or pinkish red and yellow three kinds of colors) triple channel composition.Electronic equipment is according to Color Channel caused by each imaging pixel
Numerical value generates the image of the photographed scene.
Above-mentioned image pickup method is focused pixel provided with first control circuit by being directed to phase, is set for imaging pixel
Second control circuit has been set, and then can be suitable for determine by first control circuit according to the ambient brightness of photographed scene
The first acquisition parameters that phase focusing pixel is used.The all pixels being compared in conventional method share a control circuit and come
Acquisition parameters are generated, and identified acquisition parameters are generally applicable for the parameter in imaging pixel, make to phase focusing pixel
With with larger limitation.The application passes through the first control circuit so that the first acquisition parameters of generation are only used for phase
The use for pixel of focusing, is not interfered by imaging pixel, to improve the validity of identified first acquisition parameters, is improved
Phase focusing pixel using the first acquisition parameters the rapidity that focus.It reduces and is carried out pair using phase focusing method
Burnt limitation, improves the applicability of phase focusing method.
In one embodiment, before step 304, further include：Obtain the scene type of photographed scene；Step 304 is wrapped
It includes：According to ambient brightness and scene type, the first acquisition parameters are determined by the first control circuit of phase focusing pixel.
Optionally, in electronic equipment with equipped with scene classification algorithm bat can be identified by calling the scene classification algorithm
Take the photograph scene characteristic included in the frame picture that scene is presented.Scene classification is carried out to photographed scene according to the scene characteristic,
To determine the scene type belonging to the photographed scene.
Scene type is the classification that is divided to photographed scene, and electronic equipment has preset several scenes type, for example,
Scene type may include but be not limited to personage, place, landscape, animal, plant, cosmetics, jewelry, musical instrument, electric appliance, movement, food
Object etc. is one such or several scenes type.Identical scene type has same or similar or belongs to same type of scene
Feature.
Electronic equipment can be according to scene classification algorithm, and it is wherein to detect the scene characteristic for including in the frame picture of photographed scene
Any or several scene type match, and using matched scene type as the scene type belonging to correspondence image.
Scene classification algorithm may be based on the index technology of color character, the scene classification technology based on texture, the scene based on shape
The one such or multiple technologies such as sorting technique and Image Classfication Technology based on spatial relationship and the algorithm being arranged.
In one embodiment, electronic equipment also can receive user and be touched to the selection operation of the scene type of photographed scene
The selection of hair instructs, and the scene type selected by user is contained in selection instruction.Electronic equipment can make the scene type
For the scene type of photographed scene.
First acquisition parameters are also with having certain relationship, electronic equipment can be according to determining between different scene types
Scene type, according to the ambient brightness of the photographed scene detected, given birth to by the first control circuit under the scene type
At corresponding first acquisition parameters.
In one embodiment, electronic equipment preset different ambient brightness under different scene types with first count
The correspondence between parameter is taken the photograph, according to identified scene type and ambient brightness, can determine accordingly by the correspondence
The first acquisition parameters.By further confirming that the scene type of photographed scene, according to the scene type and ring of the photographed scene
Border brightness determines the first acquisition parameters so that focusing is more accurate.
In one embodiment, step 304 includes：Obtain ambient brightness residing for brightness section, by with brightness section
The first control circuit of corresponding phase focusing pixel determines the first acquisition parameters, and the numerical value of the first acquisition parameters is in and brightness
Within the corresponding parameter threshold section in section.
Electronic equipment also further be provided be suitable for phase focusing brightness section, the brightness section may include it is multiple,
The range of different brightness sections is different.For example brightness section can be divided into 0lux~10lux, 10lux according to illumination size
~100lux, 100lux~1000lux, 1000lux~10000lux, 10000lux is with first-class several brightness sections.Electronics is set
It is standby that brightness section belonging to the ambient brightness is determined according to the ambient brightness detected, and according to the brightness section corresponding the
One control circuit determines the first acquisition parameters.For different brightness sections, electronic equipment is further provided with the brightness section
The correspondence of interior ambient brightness and the first acquisition parameters calculates this according to determining brightness section and correspondence
First acquisition parameters.Wherein, identified first acquisition parameters be in the corresponding parameter threshold section of brightness section within.
By the way that different brightness sections is arranged, determined according to the brightness section belonging to the ambient brightness of photographed scene corresponding
The first acquisition parameters, further improve phase focusing accuracy and rapidity.
In one embodiment, it according to the first acquisition parameters, is focused, is wrapped to photographed scene by phase focusing pixel
It includes：Identify the shooting main body in photographed scene；According to the first acquisition parameters, pixel is focused to the bat in photographed scene by phase
Main body is taken the photograph to focus.
Image content in the recognizable frame picture generated according to photographed scene of electronic equipment, it is true according to the image content
Determine the shooting main body in photographed scene.The content that main body indicates main presentation in photographed scene is shot, can be some in scene
Personage, animal, landscape, building etc..Electronic equipment is according to people or object and people or the object institute in photographed scene in picture in
The information such as the region at place shoot the main information of main body to determine.The main information includes type of subject and the bat for shooting main body
Take the photograph main body region residing in photographed scene, i.e. body region.
Include type of subject and body region with main information, and for type of subject behaviour, which can be
The region that boundary of the main body in frame picture is surrounded is shot, can also be a specific shape area.Such as main body
Region can be the region where portrait, that is, portrait boundary area defined, can also be a rectangular area, the square
Shape region contains the region where portrait.The region is in an intermediate position in frame picture, accounts for about half in entire frame picture
Space.
Electronic equipment can analyze image data included in frame picture, identify shooting main body therein, go forward side by side
And determine the main information of the shooting main body.Optionally, can be directed in the frame picture, the image data in the predeterminable area into
Row analysis, identification shooting main body.The predeterminable area can be at the intermediate region in frame picture, when not identified out of predeterminable area
After shooting main body, then whole image datas is analyzed, identification shooting main body.Electronic equipment can be according in the frame picture
The image data in image data or above-mentioned predeterminable area in whole region carries out feature detection, identifies in frame picture
Including scene information, according to the scene information determine shooting main body.Wherein, scene information may include the people in frame picture or object
And people or the object information such as location and size in frame picture.
For the shooting main body identified, electronic equipment can obtain corresponding first acquisition parameters of the body region, and
It is focused to the shooting main body according to first acquisition parameters, so that it is determined that the focal length of the photographed scene.By further
It identifies the shooting main body in photographed scene, and is focused to the shooting main body according to the first acquisition parameters, further increased
The validity of focusing.
In one embodiment, step 304 includes：According to ambient brightness, pass through the phase focusing pixel in each region
First control circuit determine the first acquisition parameters of corresponding region；Step 306 includes：Joined according to the first of each region the shooting
Number focuses to photographed scene by phase focusing pixel, determines the focal length of photographed scene.
Electronic equipment has further divided multiple regions for the pixel of dot matrix distribution, and each region can be referred to as a window
Mouthful.Wherein, there can be one or more pairs of phase-detection pixels in each window.Each window corresponds to pair in detection photographed scene
A region, the region of the photographed scene detected by all windows is answered to constitute the complete detection to photographed scene.At one
In embodiment, the pixel that can be distributed to dot matrix is evenly dividing or random division, to be divided into the window of respective numbers.
Accordingly, each window is not of uniform size fixed identical, for example may make window in an intermediate position larger, and in side
Window is relatively small.
Electronic equipment can be directed to each window and carry out separate cabling, and the phase focusing pixel in different windows, which has, to be corresponded to not
Same first control circuit.Electronic equipment can obtain the ambient brightness of the corresponding shooting area of each window, can be according to the window
The ambient brightness in corresponding shooting environmental region generates corresponding first acquisition parameters, is focused according to the phase in each window
The first acquisition parameters that pixel detection goes out, focus to photographed scene.
For example, as shown in figure 4, according to the size of lattice pixels 410, can be evenly dividing into 3 rows 3 row 9 are same
The window of size.Each window corresponds to a shooting area of detection photographed scene 430, forms one-to-one shooting.Such as
Window 411 corresponds to shooting area 431, and window 415 corresponds to shooting area 435 etc..Electronic equipment can be according to the ring of shooting area 431
Border brightness focuses pixel and first control circuit to generate first acquisition parameters, according to bat by phase in window 411
The ambient brightness for taking the photograph region 432 focuses pixel and first control circuit to generate the first count by phase in window 412
Parameter is taken the photograph, according to the first acquisition parameters of each window, is focused to photographed scene by phase focusing pixel, determines shooting
The focal length of scene.
Determine that the first shooting is joined by carrying out window division, and according to the ambient brightness in the corresponding region of each window
Number ensures that the accuracy of focusing to can avoid the interference in other regions.Such as when there are some or multiple shootings
When the ambient brightness in region is excessive or excessively dark, and the ambient brightness of other shooting areas is within suitable brightness section
When, corresponding shooting area can be generated to the first control circuit for pixel of focusing by the phase in the window of the correspondence shooting area
First acquisition parameters in domain so that the first acquisition parameters of generation are suitable for the ambient brightness of corresponding shooting area, and avoid by
It is interfered in by other shooting areas, ensures that the rapidity and accuracy of focusing.
In one embodiment, as shown in figure 5, step 310 includes the following steps 502 to step 508.
Step 502, phase information corresponding with photographed scene is generated by phase focusing pixel according to the first acquisition parameters.
Electronic equipment can be in the state of the focusing, the detection by each phase focusing pixel to corresponding photographed scene,
Further according to first acquisition parameters, corresponding phase information is generated.
Step 504, according to the correspondence between phase information and imaging data, corresponding with photographed scene first is generated
Imaging data.
Imaging data indicates to go out to shoot the data of image for rendering on pixel, can be above-mentioned RGB, HSV or CMY etc.
Any one color channel data.First imaging data is to pass through the obtained imaging data of the first acquisition parameters.Electronic equipment
In preset phase focusing pixel generate phase information and imaging data between correspondence, according to identified phase believe
Breath and the correspondence, can calculate the first imaging data.Wherein, which can be to be converted into being imaged by phase information
The transfer algorithm of data.
Step 506, the second imaging data corresponding with photographed scene is generated by imaging pixel according to the second acquisition parameters.
Second imaging data be by second acquisition parameters by the imaging pixel that generates.Imaging pixel can according to this second
Acquisition parameters shoot photographed scene by imaging pixel, generate corresponding second imaging pixel.
Step 508, according to focal length, the first imaging data and the second imaging data, the image of photographed scene is generated.
Optionally, electronic equipment can receive corresponding shooting instruction, in the state of the focusing, according to by each phase pair
The second imaging data that the first imaging data and each imaging pixel that burnt pixel obtains obtain synthesizes the scene of corresponding shooting
Image.Wherein, each imaging data is the color data of the middle corresponding position of the photographed scene of respective pixel reflection, by
Each imaging data may make up the image of corresponding photographed scene.
In the above method, by determining the first imaging data by phase information so that identified imaging data is not necessarily to
The information that other imaging pixels generate is relied on, is avoided bad in being imaged the data that phase focusing pixel generates as shooting
Rapidity and accuracy that imaging calculates has can be improved in point processing.
In one embodiment, obtain corresponding first imaging pixel for by each phase focusing pixel, it is combinable with
The second imaging pixel that the adjacent one or more imaging pixels of phase focusing pixel obtain, by first imaging pixel and phase
Adjacent second imaging pixel of one or more is weighted the processing such as summation, the imaging pixel that generates that treated, and treated by general
Imaging pixel as with the imaging pixel in the corresponding photographed scene region of phase focusing pixel, and by each treated imaging
Pixel generates the image of photographed scene with the second imaging pixel.By the first imaging pixel and the second imaging pixel adjacent thereto Lai
Generate treated imaging pixel, in the image that generation can be improved, the accuracy of the imaging of corresponding position.
In one embodiment, as shown in fig. 6, providing another image pickup method, this method include the following steps 602 to
Step 618.
Step 602, the ambient brightness of photographed scene is obtained.
Step 604, the shooting main body in photographed scene is identified.
In one embodiment, when detecting that shooting picture that photographed scene is presented, can be by the face there are when face
It is determined as shooting main body.When there are multiple faces, one of face can be chosen from multiple faces as owner's face, will be led
Face is determined as shooting main body.
Wherein it is determined that the mode of owner's face includes：The face area that is occupied in shooting picture according to each face and/or
Face clarity determines owner's face.Optionally, the maximum face of face area can be obtained from image, judge whether face meets
Preset condition；If so, using the maximum face of face area as owner's face of image；If it is not, then continuing to obtain from image
The face that face size takes second place, judges whether face meets preset condition, is performed repeatedly until that face area reaches minimum
Area threshold or until getting owner's face.
In one embodiment, the highest face of face clarity can be also obtained from image, judge whether face meets
Preset condition；If so, using the highest face of face clarity as owner's face of image；If it is not, then continuing to obtain from image
The face for taking face clarity to take second place, judges whether face meets preset condition, is performed repeatedly until that face clarity reaches most
Small clarity threshold or until getting owner's face.
Wherein, above-mentioned preset condition includes but not limited to following：Judge whether the clarity of face reaches and can identify
Go out the threshold value of the corresponding identity of face, if further judging the shooting angle and focus of the maximum face of face area, sentences
Whether disconnected shooting angle is positive face, judges to shoot whether focus is that the people's face accumulates maximum face, judges the people's face product most
Whether big face is nearest from camera lens.
Step 606, according to ambient brightness, the first control of pixel of being focused by the phase in region corresponding with shooting main body
Circuit processed determines the first acquisition parameters of corresponding region.
For the shooting main body identified, shooting main body region residing in photographed scene can be further detected,
And determine the first acquisition parameters of the photographed scene according to the first control circuit of phase corresponding with region focusing pixel.
For example, it if as shown in figure 4, identified shooting main body is at the shooting area 438 in photographed scene 430, calls
The first control circuit of phase focusing pixel in window corresponding with the shooting area 438 418, utilizes the first control circuit
First acquisition parameters of shooting area corresponding with phase focusing pixel determination 438.
Step 608, according to first acquisition parameters in the corresponding region of shooting main body, pixel is focused to shooting field by phase
Shooting main body in scape is focused, and determines the focal length of photographed scene.
By according to the first shooting area for generating to shooting main body, being focused to shooting main body, improve really
The validity of fixed focal length.
Step 610, the second shooting is determined by the second control circuit of imaging pixel according to ambient brightness and shooting main body
Parameter.
In one embodiment, second acquisition parameters and the first acquisition parameters may include exposure time and gain.I.e.
First acquisition parameters include the first exposure time and the first gain, and the second acquisition parameters include that the second exposure time and second increase
Benefit.It is to be appreciated that since the first acquisition parameters are the parameters generated for being supplied to phase focusing pixel to be focused, and
Second acquisition parameters are the parameters for being supplied to imaging pixel to be imaged, so when for same photographed scene, the
The numerical value of one acquisition parameters and the second acquisition parameters simultaneously differs.
For example, for the larger photographed scene (being shot under such as strong outdoor light) of a certain ambient brightness, in order to realize
Preferable imaging, electronic equipment determine relatively small second exposure by second control circuit according to the ambient brightness
Duration and relatively large second gain, to be supplied to imaging pixel, and fast and effeciently focus to realize, electronic equipment is logical
It crosses first control circuit and relatively large first exposure time and relatively small first gain is determined, to be supplied to phase
Position focusing pixel.Wherein, which is more than the second exposure time, and the first gain is then less than the second gain.
It is directed to the smaller photographed scene (such as night scene shooting) of a certain ambient brightness for another example, in order to realize preferable imaging,
Electronic equipment determines relatively large second exposure time and opposite by second control circuit according to the ambient brightness
The second smaller gain, to be supplied to imaging pixel, and fast and effeciently focuses to realize, electronic equipment passes through the first control
Circuit determines relatively small first exposure time and relatively large first gain, to be supplied to phase focusing picture
Element.Wherein, which is less than the second exposure time, and the first gain is then more than the second gain.
Step 612, phase information corresponding with photographed scene is generated by phase focusing pixel according to the first acquisition parameters.
Step 614, according to the correspondence between phase information and imaging data, corresponding with photographed scene first is generated
Imaging data.
Step 616, the second imaging data corresponding with photographed scene is generated by imaging pixel according to the second acquisition parameters.
Step 618, according to focal length, the first imaging data and the second imaging data, the image of photographed scene is generated.
In one embodiment, obtain corresponding first imaging pixel for by each phase focusing pixel, it is combinable with
The second imaging pixel that the adjacent one or more imaging pixels of phase focusing pixel obtain, by first imaging pixel and phase
Adjacent second imaging pixel of one or more is weighted the processing such as summation, the imaging pixel that generates that treated, and treated by general
Imaging pixel as with the imaging pixel in the corresponding photographed scene region of phase focusing pixel, and by each treated imaging
Pixel generates the image of photographed scene with the second imaging pixel.By the first imaging pixel and the second imaging pixel adjacent thereto Lai
Generate treated imaging pixel, in the image that generation can be improved, the accuracy of the imaging of corresponding position.
It should be understood that although each step in the flow chart of Fig. 3, Fig. 5 and Fig. 6 is shown successively according to the instruction of arrow
Show, but these steps are not the inevitable sequence indicated according to arrow to be executed successively.Unless expressly state otherwise herein, this
There is no stringent sequences to limit for the execution of a little steps, these steps can execute in other order.Moreover, Fig. 3, Fig. 5 and
At least part step in Fig. 6 may include that either these sub-steps of multiple stages or stage be not necessarily for multiple sub-steps
It is so to execute completion in synchronization, but can execute at different times, these sub-steps or stage execute sequence
Also it is not necessarily and carries out successively, but can be with other steps either sub-step of other steps or at least part in stage
It executes in turn or alternately.
In one embodiment, as shown in fig. 7, providing a kind of filming apparatus, which includes environment information acquisition mould
Block 702, first shoots parameter determination module 704, Focusing module 706, second shoots parameter determination module 708 and image generates
Module 710.Wherein,
Environment information acquisition module 702 is used to obtain the ambient brightness of photographed scene.
First shooting parameter determination module 704 is used for the first control circuit by phase focusing pixel according to ambient brightness
Determine the first acquisition parameters
Focusing module 706 is used to, according to the first acquisition parameters, focus to photographed scene by phase focusing pixel, really
Determine the focal length of photographed scene.
Second shooting parameter determination module 708 is used to be determined by the second control circuit of imaging pixel according to ambient brightness
Second acquisition parameters.
Image generation module 710 generates shooting for being shot to photographed scene according to focal length and the second acquisition parameters
The image of scene.
In one embodiment, environment information acquisition module 702 is additionally operable to obtain the scene type of photographed scene；First count
It takes the photograph parameter determination module 704 to be additionally operable to according to ambient brightness and scene type, the first control circuit for pixel of focusing by phase
Determine the first acquisition parameters.
In one embodiment, environment information acquisition module 702 is additionally operable to obtain the brightness section residing for ambient brightness, leads to
The first control circuit for crossing phase focusing pixel corresponding with brightness section determines the first acquisition parameters, the number of the first acquisition parameters
Value is within parameter threshold corresponding with brightness section section.
In one embodiment, Focusing module 706 is additionally operable to the shooting main body in identification photographed scene；According to the first shooting
Parameter focuses to the shooting main body in photographed scene by phase focusing pixel.
In one embodiment, the first shooting parameter determination module 704 is additionally operable to, according to ambient brightness, pass through each region
The first control circuit of interior phase focusing pixel determines the first acquisition parameters of corresponding region；Focusing module 706 is additionally operable to root
According to first acquisition parameters in each region, focused to photographed scene by phase focusing pixel.
In one embodiment, as shown in figure 8, the image generation module 710 includes：
Phase information generation unit 802, for being generated and shooting field by phase focusing pixel according to the first acquisition parameters
The corresponding phase information of scape.
First imaging data generation unit 804, for according to the correspondence between phase information and imaging data, generating
The first imaging data corresponding with photographed scene；
Second imaging data generation unit 806, for being generated by imaging pixel according to the second acquisition parameters and shooting field
Corresponding second imaging data of scape；
Image generation unit 808, for according to focal length, the first imaging data and the second imaging data, generating photographed scene
Image.
In one embodiment, the first acquisition parameters include the first time for exposure and the first gain；Second acquisition parameters packet
Include the second time for exposure and the second gain.
Above-mentioned filming apparatus is focused pixel provided with first control circuit by being directed to phase, is set for imaging pixel
Second control circuit has been set, and then can be suitable for determine by first control circuit according to the ambient brightness of photographed scene
The first acquisition parameters that phase focusing pixel is used.The all pixels being compared in conventional method share a control circuit and come
Acquisition parameters are generated, and identified acquisition parameters are generally applicable for the parameter in imaging pixel, make to phase focusing pixel
With with larger limitation.The application passes through the first control circuit so that the first acquisition parameters of generation are only used for phase
The use for pixel of focusing, is not interfered by imaging pixel, to improve the validity of identified first acquisition parameters, is improved
Phase focusing pixel using the first acquisition parameters the rapidity that focus.It reduces and is carried out pair using phase focusing method
Burnt limitation, improves the applicability of phase focusing method.
The division of modules and/or unit is only used for for example, in other embodiments in above-mentioned filming apparatus, can
Filming apparatus is divided into different modules and/or unit as required, to complete all or part of work(of above-mentioned filming apparatus
Energy.
Specific about filming apparatus limits the restriction that may refer to above for image pickup method, and details are not described herein.
Modules and/or unit in above-mentioned filming apparatus can be realized fully or partially through software, hardware and combinations thereof.It is above-mentioned
Each module and/or unit can be embedded in or in the form of hardware independently of in the processors in computer equipment, can also be with software
Form is stored in the memory in computer equipment, and the above modules and/or unit pair are executed in order to which processor calls
The operation answered.
The realization of modules and/or unit in the filming apparatus provided in the embodiment of the present application can be computer program
Form.The computer program can be run in terminal or server.The program module and/or unit that the computer program is constituted
It is storable on the memory of the electronic equipments such as terminal or server.When the computer program is executed by processor, this Shen is realized
Please be described in embodiment image pickup method the step of.
The embodiment of the present application also provides a kind of computer readable storage mediums.One or more is executable comprising computer
The non-volatile computer readable storage medium storing program for executing of instruction, when computer executable instructions are executed by one or more processors,
So that processor executes the step of image pickup method.
A kind of computer program product including instruction, when run on a computer so that computer executes shooting
Method.
The embodiment of the present application also provides a kind of electronic equipment.Above-mentioned electronic equipment includes image processing circuit, at image
Managing circuit can utilize hardware and or software component to realize, it may include define ISP (Image Signal Processing, figure
As signal processing) the various processing units of pipeline.Fig. 9 is the schematic diagram of image processing circuit in one embodiment.Such as Fig. 9 institutes
Show, for purposes of illustration only, only showing the various aspects with the relevant image processing techniques of the embodiment of the present application.
As shown in figure 9, image processing circuit includes the first ISP processors 912, the 2nd ISP processors 914 and control logic
Device 950.It is illustrated by taking the first camera 910 as an example, the first image data that the first camera 910 captures is first by first
ISP processors 920 processing, the first ISP processors 920 to the first image data analyzed with capture can be used for determine and/or
The image statistics of one or more control parameters of first camera 910.First camera 910 may include tool there are one or
912 and first imaging sensor 914 of multiple first lens.First imaging sensor 914 may include colour filter array (such as
Bayer filters), the first imaging sensor 914 can obtain the light intensity captured with each imaging pixel of the first imaging sensor 914
Degree and wavelength information, and one group of first raw image data that can be handled by the first ISP processors 920 is provided.
First ISP processors 920 handle the first raw image data pixel by pixel in various formats.For example, each figure
As pixel can carry out the first raw image data with the bit depth of 8,10,12 or 14 bits, the first ISP processors 920
The statistical information of one or more image processing operations, collection about image data.Wherein, image processing operations can by identical or
Different bit depth precision carries out.
First ISP processors 920 can also receive image data from video memory 960.Video memory 960 can be storage
Independent private memory in the part of device device, storage device or electronic equipment, and may include DMA (Direct
Memory Access, direct direct memory access (DMA)) feature.
When receiving from 914 interface of the first imaging sensor or or raw image data from video memory 930
When, the first ISP processors 920 can carry out one or more image processing operations, such as time-domain filtering.Treated, and image data can
It is sent to video memory 960, to carry out other processing before shown.First ISP processors 920 are stored from image
Device 960 receives processing data, and carries out the image in original domain and in RGB and YCbCr color spaces to the processing data
Data processing.Treated that image data may be output to display 970 for first ISP processors 920, for user's viewing and/or
It is further processed by graphics engine or GPU (Graphics Processing Unit, graphics processor).In addition, at the first ISP
The output of reason device 920 also can be transmitted to video memory 960, and display 970 can read picture number from video memory 960
According to.In one embodiment, video memory 960 can be configured as realizing one or more frame buffers.
The statistical data that first ISP processors 920 determine, which can be transmitted, gives control logic device Unit 950.For example, statistical data
It may include automatic exposure, automatic white balance, automatic focusing, flicker detection, black level compensation, 2 shadow corrections etc..Control logic device
950 may include the processor and/or microcontroller that execute one or more routines (such as firmware), and one or more routines can basis
The statistical data of reception determines the control parameter of the first camera 910 and the control parameter of the first ISP processors 920.
Similar with the first camera 912 and the first ISP processors 920, the first camera 910 may include there are one tools or more
912 and first imaging sensor 914 of a first lens.The second image transmitting that second camera 930 acquires gives the 2nd ISP processing
Device 940 is handled, can be by the statistical data of the second image (such as image after the 2nd ISP processors 940 handle the second image
Brightness, the contrast value of image, color of image etc.) it is sent to control logic device 950, control logic device 950 can be according to statistical number
According to the control parameter for determining second camera 930, to second camera 930 can be carried out according to control parameter auto-focusing, from
The operations such as dynamic exposure.Second image can store after the 2nd ISP processors 940 are handled into video memory 960, the
Two ISP processors 940 can also read the image stored in video memory 960 with to handling.In addition, the second image passes through
Display 970 can be sent directly to after ISP processors 920 are handled by, which crossing, is shown, display 970 can also read image
Image in memory 960 is to be shown.
The step of can realizing the image pickup method described in the embodiment of the present application with image processing techniques in Fig. 9.
Used in this application may include to any reference of memory, storage, database or other media is non-volatile
And/or volatile memory.Suitable nonvolatile memory may include read-only memory (ROM), programming ROM (PROM),
Electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include arbitrary access
Memory (RAM), it is used as external cache.By way of illustration and not limitation, RAM is available in many forms, such as
It is static RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDR SDRAM), enhanced
SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM).
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the application the scope of the claims therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the guarantor of the application
Protect range.Therefore, the protection domain of the application patent should be determined by the appended claims.
Claims (10)
1. a kind of image pickup method, which is characterized in that including：
Obtain the ambient brightness of photographed scene；
The first acquisition parameters are determined by the first control circuit of phase focusing pixel according to the ambient brightness；
According to first acquisition parameters, focused to the photographed scene by phase focusing pixel, described in determination
The focal length of photographed scene；
The second acquisition parameters are determined by the second control circuit of imaging pixel according to the ambient brightness；
The photographed scene is shot according to the focal length and the second acquisition parameters, generates the image of the photographed scene.
2. according to the method described in claim 1, it is characterized in that, being focused picture by phase according to the ambient brightness described
Before the first control circuit of element determines the first acquisition parameters, further include：
Obtain the scene type of the photographed scene；
It is described that first acquisition parameters are determined by the first control circuit of phase focusing pixel according to the ambient brightness, including：
According to the ambient brightness and the scene type, the first shooting is determined by the first control circuit of phase focusing pixel
Parameter.
3. according to the method described in claim 1, it is characterized in that, described focused pixel according to the ambient brightness by phase
First control circuit determine the first acquisition parameters, including：
The brightness section residing for the ambient brightness is obtained, the first of pixel of being focused by phase corresponding with the brightness section
Control circuit determines that the first acquisition parameters, the numerical value of first acquisition parameters are in parameter threshold corresponding with the brightness section
It is worth within section.
4. according to the method described in claim 1, it is characterized in that, described according to first acquisition parameters, pass through the phase
Position focusing pixel focuses to the photographed scene, including：
Identify the shooting main body in the photographed scene；
According to first acquisition parameters, the shooting main body in the photographed scene is carried out pair by phase pixel of focusing
It is burnt.
5. according to the method described in claim 1, it is characterized in that, described focused pixel according to the ambient brightness by phase
First control circuit determine the first acquisition parameters, including：
According to the ambient brightness, corresponding region is determined by the first control circuit of the phase focusing pixel in each region
First acquisition parameters；
It is described to be focused to the photographed scene by phase focusing pixel according to first acquisition parameters, including：
According to first acquisition parameters in each region, focused to the photographed scene by phase focusing pixel.
6. the method according to any one of claims 1 to 5, it is characterized in that, described according to the focal length and second count
It takes the photograph parameter to shoot the photographed scene, generates the image of the photographed scene, including：
Phase information corresponding with the photographed scene is generated by phase focusing pixel according to first acquisition parameters；
According to the correspondence between the phase information and imaging data, the first imaging corresponding with the photographed scene is generated
Data；
The second imaging data corresponding with the photographed scene is generated by the imaging pixel according to second acquisition parameters；
According to the focal length, the first imaging data and second imaging data, the image of the photographed scene is generated.
7. the method according to any one of claims 1 to 5, it is characterized in that, first acquisition parameters include first
Time for exposure and the first gain；Second acquisition parameters include the second time for exposure and the second gain.
8. a kind of filming apparatus, which is characterized in that described device includes：
Environment information acquisition module, the ambient brightness for obtaining photographed scene；
First shooting parameter determination module, for true by the first control circuit of phase focusing pixel according to the ambient brightness
Fixed first acquisition parameters；
Focusing module, for according to first acquisition parameters, pixel to be focused to photographed scene progress by the phase
Focusing, determines the focal length of the photographed scene；
Second shooting parameter determination module, for determining the by the second control circuit of imaging pixel according to the ambient brightness
Two acquisition parameters；
Image generation module generates institute for being shot to the photographed scene according to the focal length and the second acquisition parameters
State the image of photographed scene.
9. a kind of electronic equipment, including memory and processor, computer program, the computer are stored in the memory
When program is executed by the processor so that the processor executes the image pickup method as described in any one of claim 1 to 7
The step of.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of image pickup method as described in any one of claim 1 to 7 is realized when being executed by processor.
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