CN109040609A - Exposal control method, device and electronic equipment - Google Patents
Exposal control method, device and electronic equipment Download PDFInfo
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- CN109040609A CN109040609A CN201810962773.6A CN201810962773A CN109040609A CN 109040609 A CN109040609 A CN 109040609A CN 201810962773 A CN201810962773 A CN 201810962773A CN 109040609 A CN109040609 A CN 109040609A
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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
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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
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
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Abstract
The present invention proposes a kind of exposal control method, device and electronic equipment, wherein, method comprises determining that present filming scene belongs to night scene scene, according to the degree of jitter of imaging device, identify the applicable night scene mode of present filming scene, according to night scene mode, determine the exposure parameter of each frame image to be collected, control is exposed using exposure parameter, it realizes based on different photographed scenes, dynamic adjustment night scene mode and exposure parameter, the image quality of image when improving night scene shooting, it solves in the related technology, the mode of night scene shooting is single, all photographed scenes can not be applicable in, cause the technical problem that shooting quality is poor under certain scenes.
Description
Technical field
The present invention relates to technical field of mobile terminals more particularly to a kind of exposal control methods, device and electronic equipment.
Background technique
With the development of mobile terminal technology and image processing techniques, requirement of the people for shooting is higher and higher, even if
It is ambient light darker night, it is also desirable to the image of available high quality.
Currently, mobile terminal is mostly shot using single night scene mode, and light in night scene environment under night scene scene
Source strength is weak and position is indefinite, so that shooting environmental is complicated and changeable, therefore, single night scene mode can not be suitable for all fields
Scape can have that shooting effect is bad in some scenes.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the present invention proposes a kind of exposal control method, in night scene shooting, the night of shooting is determined according to degree of jitter
Scape mode, and determine the exposure parameter that each frame image uses in currently employed night scene mode, it realizes based on different shootings
Scene, dynamic adjust night scene mode and exposure parameter, the image quality of image when improving night scene shooting.
The present invention proposes a kind of exposure-control device.
The present invention proposes a kind of electronic equipment.
The present invention proposes a kind of computer readable storage medium.
One aspect of the present invention embodiment proposes a kind of exposal control method, comprising:
Determine that present filming scene belongs to night scene scene；
According to the degree of jitter of imaging device, the applicable night scene mode of present filming scene is identified；
According to the night scene mode, the exposure parameter of each frame image to be collected is determined；
Control is exposed using the exposure parameter.
Another aspect of the invention embodiment proposes a kind of exposure-control device, comprising:
Scene determining module, for determining that present filming scene belongs to night scene scene；
Identification module identifies the applicable night scene mode of present filming scene for the degree of jitter according to imaging device；
Parameter determination module, for determining the exposure parameter of each frame image to be collected according to the night scene mode；
Control module, for being exposed control using the exposure parameter.
Another aspect of the invention embodiment proposes a kind of electronic equipment, comprising: memory, processor and is stored in storage
On device and the computer program that can run on a processor, when the processor executes described program, such as aforementioned one side face is realized
The exposal control method.
Another aspect of the invention embodiment proposes a kind of computer readable storage medium, is stored thereon with computer journey
Sequence realizes the exposal control method as described in aforementioned one side face when the instruction in the storage medium is performed by processor.
Technical solution provided by the embodiment of the present invention may include it is following the utility model has the advantages that
It determines that present filming scene belongs to night scene scene, according to the degree of jitter of imaging device, identifies present filming scene
Applicable night scene mode is determined the exposure parameter of each frame image to be collected, is exposed using exposure parameter according to night scene mode
Control, realizes in night scene scene capture, uses different night scene mode and exposure parameter based on different photographed scenes, mentions
High shooting effect.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is a kind of flow diagram of exposal control method provided by the embodiment of the present invention；
Fig. 2 is the flow diagram of another kind exposal control method provided by the embodiment of the present invention；
Fig. 3 is the flow diagram of another exposal control method provided by the embodiment of the present invention；
Fig. 4 is the flow diagram of another exposal control method provided by the embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of exposure-control device provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of internal structure of electronic equipment 200 in one embodiment；And
Fig. 7 is the schematic diagram of image processing circuit 90 in one embodiment.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the exposal control method, device and electronic equipment of the embodiment of the present invention are described.
Fig. 1 is a kind of flow diagram of exposal control method provided by the embodiment of the present invention.
As shown in Figure 1, method includes the following steps:
Step 101, determine that present filming scene belongs to night scene scene.
As a kind of possible implementation, according to present filming scene, current scene is obtained using image capture module
Preview image, image characteristics extraction is carried out to preview image, the characteristics of image of extraction is inputted into identification model, according to identification mould
The scene type of type output determines that present filming scene belongs to night scene scene, wherein identification model has learnt to obtain characteristics of image
Corresponding relationship between scene type.
As alternatively possible implementation, detection is used for the user's operation of scene switching, switches to night when detecting
When the user's operation of scape scene, detection ambient brightness, as a kind of possible implementation, can be passed through with obtaining luminance information
Survey optical module built in electronic equipment detects current ambient brightness, determines the luminance information of current environment.According to bright
Information is spent, determines that present filming scene belongs to night scene scene.For example, brightness height can be measured by brightness index Lix_index,
Wherein, the value of luminance information is bigger, and it is lower to represent current scene brightness.The luminance information and preset brightness value ratio that will acquire
It is right, if the luminance information obtained is greater than predetermined luminance value, determine that present filming scene belongs to night scene scene.Conversely, if obtaining
Luminance information be less than predetermined luminance value, it is determined that present filming scene belongs to non-night scene scene, under non-night scene scene, use
High dynamic range mode is imaged, wherein when high dynamic range imaging, can be obtained by the way that different exposure bias values is arranged
Higher dynamic range, for example, 3 frame images can be acquired, the section of exposure bias value is [- 4 ,+1].
Step 102, according to the degree of jitter of imaging device, the applicable night scene mode of present filming scene is identified.
Specifically, the degree of jitter of imaging device is obtained, if degree of jitter is greater than or equal to the first dithering threshold, determination is adopted
With single frames night scene mode；If degree of jitter is greater than second jitter threshold less than the first dithering threshold, determine using hand-held night scene
Mode；If degree of jitter is less than or equal to second jitter threshold, determines and use foot prop night scene mode, wherein the first dithering threshold
Greater than second jitter threshold, the frame number for holding image to be collected under night scene mode is greater than a frame, to be collected under foot prop night scene mode
The frame number of image is greater than the frame number under hand-held night scene mode.
Step 103, according to night scene mode, the exposure parameter of each frame image to be collected is determined.
Wherein, exposure parameter includes exposure time, sensitivity and exposure bias value.
Specifically, according to night scene mode, the preset sensitivity of each frame image to be collected is determined, wherein hand-held night scene mode
Under preset sensitivity be greater than foot prop night scene mode under preset sensitivity.According to night scene mode, each frame image to be collected is determined
Preset exposure bias value determines benchmark light exposure according to the luminance information of preview image, is waited for according to benchmark light exposure and each frame
The preset exposure bias value of image is acquired, the target light exposure amount of each frame image to be collected is determined, according to each frame image to be collected
Target light exposure amount and the preset sensitivity of each frame image to be collected, determine the exposure time of each frame image to be collected.
It is larger due to shaking under hand-held night scene mode in the embodiment of the present invention, in order to improve image quality, avoid due to
Shake leads to ghost occur, reduces the frame number that image is shot under hand-held night scene mode to the greatest extent.In addition, under night scene mode, in order to
It is enough so that highlight regions and low bright area can have suitable exposure in image, to the exposure bias value of multiple image it
Between interval setting it is smaller so that being capable of highlight regions and the smooth transition of low bright area in final composograph.In order to full simultaneously
The less frame number of image, hand are shot under relatively closely spaced and hand-held night scene mode between the exposure bias value of sufficient multiple image
The value range for holding exposure bias value under night scene mode is often arranged smaller, thus exposure bias value under hand-held night scene mode
Value range is less than the value range of exposure bias value under foot prop night scene mode.
Optionally, the degree of jitter for holding night scene mode, can also further be segmented, in hand-held night scene mode
Under, there are corresponding relationships between degree of jitter and exposure parameter, as a kind of possible implementation, when in hand-held night scene mould
When under formula, the corresponding relationship between degree of jitter and exposure parameter, the corresponding relationship are read specifically: degree of jitter and exposure are joined
Sensitivity in number has positive relationship, that is to say, that degree of jitter is bigger, and sensitivity is bigger；In degree of jitter and exposure parameter
Exposure time have inverse relationship, that is to say, that degree of jitter is bigger, and exposure time is shorter, this is because, although sensitivity
Noise in lower image is fewer, but in the case where same light exposure, and required exposure time is longer.In order to adapt to shake feelings
Condition avoids causing image ghost occur since duration is too long, can properly increase sensitivity according to jitter conditions, is exposed with reducing
Light time is long.Meanwhile degree of jitter also with the value range of the exposure bias value in exposure parameter have inverse relationship, this be because
In order to improve image quality, to avoid leading to ghost occur due to shake, can suitably reduce shooting figure when degree of jitter being bigger
The frame number of picture.In addition, in order to make highlight regions and low bright area in image that can have suitable exposure, to more
Interval setting between the exposure bias value of frame image is smaller, so that being capable of highlight regions and low bright area in final composograph
Smooth transition.Therefore, degree of jitter is bigger, the relatively closely spaced between exposure bias value in order to meet multiple image simultaneously, with
And the less frame number of shooting image, the value range of exposure bias value is often arranged smaller.
In turn, according to the degree of jitter of imaging device, the corresponding relationship is inquired, obtains the exposure ginseng of each frame image to be collected
Number.By further being segmented to degree of jitter under hand-held night scene mode, realizes under hand-held night scene mode, be based on
Different degree of jitter improves the image quality of the image under hand-held night scene mode using different exposure parameters.
Step 104, control is exposed using exposure parameter.
Specifically, it according to determining night scene mode, is exposed using the exposure parameter of determining each frame image to be collected
Control.
In the exposal control method of the present embodiment, determine that present filming scene belongs to night scene scene, according to imaging device
Degree of jitter, the applicable night scene mode of identification present filming scene determine the exposure of each frame image to be collected according to night scene mode
Parameter is exposed control using exposure parameter, realizes based on different photographed scenes, dynamic adjusts night scene mode and exposure
Parameter, the image quality of image, solves in the related technology when improving night scene shooting, and the mode of night scene shooting is single, can not
All photographed scenes are applicable in, the technical problem that shooting quality is poor under certain scenes is caused.
Based on the above embodiment, another exposal control method is present embodiments provided, is further clearly illustrated above-mentioned
In step 102, according to the degree of jitter of imaging device, identify that the applicable night scene mode of present filming scene, Fig. 2 are that the present invention is real
Apply the flow diagram of another kind exposal control method provided by example.
As shown in Fig. 2, step 102 may include following sub-step:
Step 1021, the degree of jitter of imaging device is obtained.
Specifically, it is provided with sensor in imaging device, obtains collected displacement information, according to displacement information, determined
The degree of jitter of imaging device.As a kind of possible implementation, which can be gyroscope, and gyroscope can export
X, the displacement information of tri- axis of y and z, the displacement information of three axis by obtaining gyroscope believe the corresponding displacement of three axis
Breath take absolute value and be added summation, the sum of corresponding displacement information of three axis is indicated with S, by the value of displacement information S come
Indicate the degree of jitter of imaging device, that is to say, that the value of degree of jitter is equal to the value of displacement information S.
Step 1022, judge whether degree of jitter is greater than or equal to the first dithering threshold, if so, step 1023 is executed, if
It is no, execute step 1024.
Step 1023, it determines and uses single frames night scene mode.
Specifically, if degree of jitter is greater than or equal to the first dithering threshold, current shake is larger, directlys adopt single frames
Night scene mode obtains single-frame images, this is because when degree of jitter is larger, if acquisition multiple image, each frame image may
It differs greatly, therefore the synthesis for the image that can not be obtained when shaking larger, acquires single frames only with single frames night scene mode
Image.
Step 1024, judge whether degree of jitter is less than or equal to the first dithering threshold, and be greater than second jitter threshold, if
It is to execute step 1026, if it is not, executing step 1025.
Wherein, second jitter threshold is less than the first dithering threshold.
Step 1025, it determines using hand-held night scene mode.
Specifically, if degree of jitter is not greater than or equal to the first dithering threshold, illustrate current dither not and be it is very big,
Further judgement, whether current dither degree is less than or equal to the first dithering threshold, and is greater than second jitter threshold, if so,
Using hand-held night scene mode.
Wherein, the frame number for holding image to be collected under night scene mode is greater than a frame, for example, can be 7 frames, wherein each
Exposure parameter used by frame is not exactly the same, for the determination method of exposure parameter, can be discussed in detail in following embodiments.
Step 1026, it determines and uses foot prop night scene mode.
Specifically, if current dither degree is not and to be greater than second jitter threshold for less than or equal to the first dithering threshold,
Then use foot prop night scene mode.
Wherein, the frame number of image to be collected is greater than the frame of image to be collected under hand-held night scene mode under foot prop night scene mode
Number, that is to say, that foot prop night scene mode, corresponding shake is very small, in addition imaging device itself has stabilization dispelling tactics,
Such as optical anti-vibration (Optical image stabilization, OIS) etc., therefore, the shake under foot prop night scene mode is very
It is small, therefore the time that can be shot is more long, to obtain the picture of high quality, therefore, in this mode, can be continuously shot compared with
Multiple image, for example, can be 17 frames, to improve the image quality of image, wherein exposure parameter used by each frame is endless
It is exactly the same, for the determination method of exposure parameter, can be discussed in detail in following embodiments.
In the exposal control method of the present embodiment, the degree of jitter of imaging device is obtained, according to the size of degree of jitter, really
Needing the night scene mode used calmly is respectively foot prop night scene mode, holds night scene mode and single frames night scene mode, by by night scene
Mode is finely divided, and realizes the scenes of different night scene shootings using different night scene modes, improve acquisition image at
Image quality amount.
Based on the above embodiment, the embodiment of the present invention also proposed a kind of exposal control method, further clear explanation
According to determining night scene mode, how to determine that the exposure parameter of each frame image to be collected, Fig. 3 are provided by the embodiment of the present invention
The flow diagram of another exposal control method, as shown in figure 3, step 103 can also include following sub-step:
Step 1031, according to night scene mode, the preset sensitivity of each frame image to be collected is determined.
In a scenario, if night scene mode is hand-held night scene mode, it is determined that each frame is to be collected under hand-held night scene mode
The preset sensitivity iso of image, for example, sensitivity is 200iso.
Under another scene, if night scene mode is foot prop night scene mode, it is determined that each frame waits adopting under foot prop night scene mode
Collect the preset sensitivity iso of image, for example, sensitivity is 100iso.
It should be noted that in the present embodiment, the default sensitivity of each frame image to be collected under night scene mode is held, it can be with
It is identical, it there may also be lesser difference, is not construed as limiting in the present embodiment, similarly, is preset under foot prop night scene mode photosensitive
The principle of degree is under hand-held night scene mode, and details are not described herein again.
It is to be appreciated that under foot prop night scene mode the preset value of sensitivity be less than under hand-held night scene mode preset it is photosensitive
Degree, this is because degree of jitter is less than the degree of jitter of hand-held night scene mode under foot prop night scene mode, because degree of jitter is smaller,
Therefore, when acquiring each frame figure to be collected, lower sensitivity can be used, so that prolonged exposure duration, reduces figure to be collected
The noise of picture improves the image quality of image.
Step 1032, according to night scene mode, the preset exposure bias value of each frame image to be collected is determined.
Specifically, based on different night scene modes, determine that different each frames waits for the preset exposure bias value of standby image.
In a scenario, if night scene mode is foot prop night scene mode, the preset exposure of each frame image to be collected is determined
Offset, for example, image setting to be collected is 17 frames, by exposure bias value EV (Exposure under foot prop night scene mode
Compensation Value) range be set as [- 6 ,+2] EV, the interval of the exposure bias value of every frame is set as 0.5EV.
Under another scene, if night scene mode is to determine the preset of each frame image to be collected under hand-held night scene mode
The range of exposure bias value is set as by exposure bias value for example, image setting to be collected is 7 frames under hand-held night scene mode
[- 6 ,+1] EV, for example, corresponding 7 frame images to be collected, corresponding exposure bias value may respectively be [- 6, -3,0 ,+1 ,+1 ,+1 ,+
1]EV。
It should be noted that in practical applications, according to the image of ambient brightness and shooting, exposure bias value can also be sent out
Changing turns the range of exposure down, for example, the range of exposure bias value is adjusted to [- 5 ,+1] under hand-held night scene mode
EV。
Step 1033, according to the luminance information of preview image, benchmark light exposure is determined.
Specifically, according to the luminance information of preview image, benchmark light exposure is determined, as a kind of possible implementation,
By the survey optical module in electronic equipment, the luminance information of the corresponding preview image of present filming scene is measured, and with setting
The luminance information that measurement obtains is converted, determines benchmark light exposure, be set as EVO by lower sensitivity, for example, according to
Surveying the sensitivity that optical module measurement obtains is 500iso, and exposure time is 50 milliseconds (ms), and target sensitivity is 100iso, then turns
It is 100iso, exposure time 250ms that sensitivity is obtained after change, and sensitivity 100iso, exposure time 250ms are exposed as benchmark
Light quantity EVO.
It should be noted that EVO is not a fixed value, but it is changed according to the luminance information of preview image
Value, when ambient brightness changes, the luminance information of preview image can then change, then benchmark light exposure EV0 is then
Also it changes.
It should be noted that there is no points of timing for the execution of above-mentioned steps 1031, step 1032 and step 1033.
Step 1034, according to benchmark light exposure and the preset exposure bias value of each frame image to be collected, determine that each frame waits adopting
Collect the target light exposure amount of image.
For example, under hand-held night scene mode, 7 frame images to be collected, corresponding preset exposure bias value is respectively-
6EV, -3EV, 0EV ,+1EV ,+1EV ,+1EV ,+1EV, wherein "+" expression increases on the basis of surveying the determined benchmark light exposure of light
Exposure, "-", which indicates to reduce, to expose, the series that corresponding number exposes for compensation, according to the preset exposure of each frame image to be collected
Offset and benchmark light exposure determine the target light exposure amount of each frame image to be collected, for example, if the exposure bias value of a frame image
For -6EV, number -6 be the series of compensation exposure, and benchmark light exposure is EVO, it is determined that the target light exposure amount of the frame image be
EVO*2-6, i.e. EVO/64 reduces the brightness of the image frame grabber；If the exposure bias value of a frame image is 1EV, benchmark exposure
Amount is EVO, it is determined that the target light exposure amount of the frame image be EVO*2, as 2 times of EVO improves the image frame grabber
Brightness, similarly, the confirmation method of the target light exposure amount of other each frame images to be collected are identical, are not listed one by one herein.
It should be noted that the target light exposure method for determination of amount of each frame image to be collected is identical under foot prop night scene mode,
Details are not described herein again.
Step 1035, according to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected,
Determine the exposure time of each frame image to be collected.
In the embodiment of the present invention, in the night mode, when acquiring each frame image, f-number be it is fixed, for each frame
Image to be collected, target light exposure amount is determined jointly by sensitivity and exposure time, when sensitivity determines, then corresponding exposure
Duration can then determine.
For example, the corresponding sensitivity IOS value of benchmark light exposure and exposure time are divided into are as follows: 100iso and 250ms, a frame wait for
The preset sensitivity for acquiring image is 100iso, and exposure bias value is -3EV, then when the target light exposure of frame image to be collected
It is a length ofAs 32ms reduces exposure time, similarly, when exposure bias value is+1EV, when obtained exposure
It is long then be 500ms, that is, improve exposure time.Similarly, it may be determined that the exposure time of each frame.Pass through the wider dynamic model of setting
It encloses, so that each frame image to be collected is respectively adopted different exposure times and is acquired, so that each section in image
Details can be clearly imaged under the control of different exposure times, to improve imaging effect.
In the embodiment of the present invention, the minimum for the exposure time that shutter is supported is 10 milliseconds (ms), in a kind of possible field
Under scape, when there is the light-illuminating camera of trial of strength in photographed scene, it is brighter that light measurer can take for current scene light, makes
Benchmark light exposure that must be determining is smaller, i.e. the corresponding exposure time of benchmark light exposure is smaller, is EVO with benchmark light exposure in turn
When the exposure time of each frame image to be collected is calculated, when being easy to appear the corresponding -6E of exposure bias value, the exposure that is calculated
Duration is likely lower than the minimum value 10ms of preset exposure time, and exposure time is then promoted to 10ms by 8ms by for example, 8ms,
And determine and promote corresponding multiplying power offset, to guarantee there is certain shooting brightness when acquiring a most dark frame, meanwhile, each frame waits for
Acquisition image is promoted all in accordance with this multiplying power offset, so that obtained image to be collected is linear increasing in brightness
Add, so that the image of acquisition, when subsequent image synthesizes, the transition of halation is naturally, improve the effect of image after synthesis.
Under alternatively possible scene, when environment is non-normally-black, exposed with the single frames longest that benchmark light exposure is calculated
Light time length may be greater than the maximum value of exposure time setting, for example, 5 seconds, for example, the sensitivity of benchmark light exposure is
100iso, exposure time are 2 seconds, and when corresponding exposure bias value is+2EV, the default sensitivity of image to be collected is also 100iso,
The exposure time being then calculated is 8 seconds, has been more than preset maximum value 5 seconds, has then needed to force down the exposed frame duration,
It forces down preset maximum value 5 seconds, determines the multiplying power forced down, and sensitivity is adjusted with this multiplying power, prevent exposure time too long, when
After longest exposure time is compressed, if light exposure when also needing to adjust exposure, only by properly increasing sensitivity
Value improves brightness when shooting, and photosensitive value can not be more than the upper limit of preset photosensitive value, such as 550iso when being promoted,
This is because biggish sensitivity is arranged, the noise in picture will increase, reduce image quality.
It should be noted that larger because shaking, it is very difficult to collect high quality when night scene mode is single frames night scene mode
Therefore image only acquires a frame image, and with the exposure time of shorter than hand-held night scene mode and foot prop night scene mode, to adopting
The image of collection carries out image exposure control, is no longer discussed in detail in the present embodiment.
In the exposal control method of the embodiment of the present invention, according to different night scene modes, each frame image to be collected is determined
Default sensitivity and preset exposure bias value determine benchmark light exposure according to the luminance information of preview image, and benchmark exposes
Light quantity determines the target light exposure amount of corresponding each frame image to be collected, according to target light exposure amount and preset each frame image to be collected
Default sensitivity, exposure time is determined, so that it is determined that the exposure parameter of each frame image to be collected, by different night scene modes
The different exposure parameter of lower setting, so that obtaining multiframe image to be captured, and reduce in the case where vibrating biggish hand-held night scene mode
Exposure time carries out Image Acquisition, in the case where shaking lesser foot prop night scene mode, obtains the image to be captured compared with multiframe, and increase
Exposure time carries out Image Acquisition, realizes in the night mode, and dynamic adjusts exposure parameter when night scene shooting, improves night scene
The image quality of image when shooting.
Based on the above embodiment, the embodiment of the present invention also proposed a kind of exposal control method, and Fig. 4 is the embodiment of the present invention
The flow diagram of another provided exposal control method, as shown in figure 4, after step 104, this method can also include
Following steps:
Step 401, collected each frame image under spectrum assignment is obtained, each frame image is synthesized, is imaged
Image.
Specifically, it according to the exposure parameter of determining each frame image to be collected, obtains under the control of corresponding exposure parameter
Collected each frame image, each frame image that will acquire are aligned, to eliminate the influence of shake, meanwhile, in image
Moving object is detected, and to eliminate ghost, in turn, respective pixel in each frame image is weighted synthesis, is obtained corresponding
One frame target image.Since the exposure parameter that each frame image got uses is different, corresponding different exposure time, therefore,
By synthesizing each frame image, then dark portion can be by the longer image of exposure time in the image of final output
Respective pixel information compensates, and highlights can be suppressed by respective pixel information in the shorter image of exposure time, therefore,
The compound imaging image of final output there is no overexposure region and owe expose region, the brightness light and shade of image is excessively uniform, have compared with
Good imaging effect.Meanwhile in the synthesis process, because electric current generate noise amplitude and position be it is random, therefore, at multiple
When image is overlapped synthesis, noise can be cancelled out each other, to improve image quality.
In the exposal control method of the embodiment of the present invention, determines that present filming scene belongs to night scene scene, set according to imaging
Standby degree of jitter, the applicable night scene mode of identification present filming scene determine each frame image to be collected according to night scene mode
Exposure parameter is exposed control using exposure parameter, and is synthesized to obtain image according to the multiple image acquired
Picture is realized in night scene scene capture, is obtained based on different photographed scenes using different night scene modes and exposure parameter
Multiple image, and multiple image is synthesized, retain highlights details and corresponding transition, improves imaging effect.
In order to realize above-described embodiment, the present invention also proposes a kind of exposure-control device.
Fig. 5 is a kind of structural schematic diagram of exposure-control device provided in an embodiment of the present invention.
As shown in figure 5, the device includes: scene determining module 51, identification module 52, parameter determination module 53 and control mould
Block 54.
Scene determining module 51, for determining that present filming scene belongs to night scene scene.
Identification module 52 identifies the applicable night scene mode of present filming scene for the degree of jitter according to imaging device.
Parameter determination module 53, for determining the exposure parameter of each frame image to be collected according to night scene mode.
Control module 54, for being exposed control using exposure parameter.
Further, in a kind of possible implementation of the embodiment of the present invention, the device further include: synthesis module.
Synthesis module, for obtaining collected each frame image under spectrum assignment；Each frame image is synthesized, is obtained
Image.
In a kind of possible implementation of the embodiment of the present invention, above-mentioned identification module 52 can also include: to obtain list
Member and judging unit.
Acquiring unit, for obtaining the degree of jitter of imaging device.
Judging unit determines if degree of jitter is greater than or equal to the first dithering threshold and uses single frames night scene mode；If shake
Degree is less than first dithering threshold, and is greater than second jitter threshold, determines using hand-held night scene mode；If degree of jitter is small
In or equal to second jitter threshold, determines and use foot prop night scene mode；
Wherein, the first dithering threshold is greater than the second jitter threshold, holds the frame number of image to be collected under night scene mode
Greater than a frame, the frame number of image to be collected is greater than the frame number under hand-held night scene mode under foot prop night scene mode.
As a kind of possible implementation, acquiring unit, the sensor for being arranged from imaging device, acquisition collected
Displacement information；According to displacement information, the degree of jitter of imaging device is determined.
As a kind of possible implementation, above-mentioned parameter determining module 53 is specifically used for:
According to night scene mode, the preset sensitivity of each frame image to be collected is determined；
Wherein, it holds preset sensitivity under night scene mode and is greater than preset sensitivity under the foot prop night scene mode.
As a kind of possible implementation, above-mentioned parameter determining module 53 is specifically also used to:
According to night scene mode, the preset exposure bias value of each frame image to be collected is determined；
According to the luminance information of preview image, benchmark light exposure is determined；
According to benchmark light exposure and the preset exposure bias value of each frame image to be collected, the mesh of each frame image to be collected is determined
Mark light exposure；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame waits for
Acquire the exposure time of image.
As a kind of possible implementation, the value range for holding exposure bias value under night scene mode is less than foot prop night scene
The value range of exposure bias value under mode.
As a kind of possible implementation, above-mentioned parameter determining module 53 specifically be can be also used for:
If reading corresponding relationship between degree of jitter and exposure parameter under hand-held night scene mode；
According to the degree of jitter of imaging device, corresponding relationship is inquired, the exposure parameter of each frame image to be collected is obtained；Its
In, exposure parameter includes exposure time, sensitivity, exposure bias value.
As a kind of possible implementation, the sensitivity in degree of jitter and exposure parameter has positive relationship；Shake
Exposure time in degree and exposure parameter has inverse relationship；The value of exposure bias value in degree of jitter and exposure parameter
Range has inverse relationship.
As a kind of possible implementation, above-mentioned scene determining module 51 is specifically used for:
Image characteristics extraction is carried out to preview image；The characteristics of image of extraction is inputted into identification model, according to identification model
The scene type of output determines that present filming scene belongs to night scene scene；Wherein, identification model learnt to obtain characteristics of image with
Corresponding relationship between scene type.
As alternatively possible implementation, above-mentioned scene determining module 51 is specifically also used to:
Detection is used for the user's operation of scene switching；When detecting the user's operation for switching to night scene scene, ring is detected
Border brightness, to obtain luminance information；According to luminance information, determine that present filming scene belongs to night scene scene.
It should be noted that the aforementioned device that the embodiment is also applied for the explanation of embodiment of the method, herein not
It repeats again.
In the exposure-control device of the present embodiment, determine that present filming scene belongs to night scene scene, according to imaging device
Degree of jitter, the applicable night scene mode of identification present filming scene determine the exposure of each frame image to be collected according to night scene mode
Parameter is exposed control using exposure parameter, realizes in night scene scene capture, based on different photographed scenes using not
Same night scene mode and exposure parameter, improves shooting effect, solves in the related technology, and the mode of night scene shooting is single, nothing
Method is applicable in all photographed scenes, causes the technical problem that shooting quality is poor under certain scenes.
In order to realize above-described embodiment, the embodiment of the present invention also proposed a kind of electronic equipment, comprising: memory, processing
Device and storage on a memory and the computer program that can run on a processor, when the processor executes described program, reality
The now exposal control method as described in preceding method embodiment.
Fig. 6 is the schematic diagram of internal structure of electronic equipment 200 in one embodiment.The electronic equipment 200 includes passing through to be
Processor 60, the memory 50 (for example, non-volatile memory medium), built-in storage 82,83 and of display screen of bus 81 of uniting connection
Input unit 84.Wherein, the memory 50 of electronic equipment 200 is stored with operating system and computer-readable instruction.The computer
Readable instruction can be executed by processor 60, to realize the control method of the application embodiment.The processor 60 is based on providing
Calculation and control ability, support the operation of entire electronic equipment 200.The built-in storage 50 of electronic equipment 200 is in memory 52
The operation of computer-readable instruction provides environment.The display screen 83 of electronic equipment 200 can be liquid crystal display or electronic ink
Water display screen etc., input unit 84 can be the touch layer covered on display screen 83, be also possible to set on 200 shell of electronic equipment
Key, trace ball or the Trackpad set, are also possible to external keyboard, Trackpad or mouse etc..The electronic equipment 200 can be
Mobile phone, tablet computer, laptop, personal digital assistant or wearable device (such as Intelligent bracelet, smartwatch, intelligence
The helmet, intelligent glasses) etc..It will be understood by those skilled in the art that structure shown in Fig. 6, only with application scheme phase
The schematic diagram of the part-structure of pass does not constitute the restriction for the electronic equipment 200 being applied thereon to application scheme, specifically
Electronic equipment 200 may include perhaps combining certain components than more or fewer components as shown in the figure or there is difference
Component layout.
Referring to Fig. 7, including image processing circuit 90, image processing circuit in the electronic equipment 200 of the embodiment of the present application
90 can be realized using hardware and or software component, including define ISP (Image Signal Processing, at picture signal
Reason) pipeline various processing units.Fig. 7 is the schematic diagram of image processing circuit 90 in one embodiment.As shown in fig. 7, for just
In explanation, the various aspects of image processing techniques relevant to the embodiment of the present application are only shown.
As shown in fig. 7, image processing circuit 90 includes ISP processor 91 (ISP processor 91 can be processor 60) and controls
Logic device 92 processed.The image data that camera 93 captures is handled by ISP processor 91 first, and ISP processor 91 is to image data
It is analyzed to capture the image statistics for the one or more control parameters that can be used for determining camera 93.Camera 93 can
Including one or more lens 932 and imaging sensor 934.Imaging sensor 934 may include colour filter array (such as Bayer
Filter), imaging sensor 934 can obtain the luminous intensity and wavelength information that each imaging pixel captures, and provide and can be handled by ISP
One group of raw image data of the processing of device 91.Sensor 94 (such as gyroscope) can be based on 94 interface type of sensor the figure of acquisition
As the parameter (such as stabilization parameter) of processing is supplied to ISP processor 91.94 interface of sensor can be SMIA (Standard
Mobile Imaging Architecture, Standard Mobile Imager framework) interface, other serial or parallel camera interfaces or
The combination of above-mentioned interface.
In addition, raw image data can also be sent to sensor 94 by imaging sensor 934, sensor 94 can be based on sensing
Raw image data is supplied to ISP processor 91 or sensor 94 and arrives raw image data storage by 94 interface type of device
In video memory 95.
ISP processor 91 handles raw image data pixel by pixel in various formats.For example, each image pixel can have
There is the bit depth of 8,10,12 or 14 bits, ISP processor 91 can carry out one or more image procossing behaviour to raw image data
Make, statistical information of the collection about image data.Wherein, image processing operations can by identical or different bit depth precision into
Row.
ISP processor 91 can also receive image data from video memory 95.For example, 94 interface of sensor is by original image
Data are sent to video memory 95, and the raw image data in video memory 95 is available to ISP processor 91 for place
Reason.Video memory 95 can be independent special in memory 50, a part of memory 50, storage equipment or electronic equipment
It with memory, and may include DMA (Direct Memory Access, direct direct memory access (DMA)) feature.
When receiving the original from 934 interface of imaging sensor or from 94 interface of sensor or from video memory 95
When beginning image data, ISP processor 91 can carry out one or more image processing operations, such as time-domain filtering.Treated image
Data can be transmitted to video memory 95, to carry out other processing before shown.ISP processor 91 is stored from image
Device 95 receives processing data, and carries out at the image data in original domain and in RGB and YCbCr color space to processing data
Reason.Treated that image data may be output to display 97 (display 97 may include display screen 83) for ISP processor 91, for
Family is watched and/or is further processed by graphics engine or GPU (Graphics Processing Unit, graphics processor).This
Outside, the output of ISP processor 91 also can be transmitted to video memory 95, and display 97 can read image from video memory 95
Data.In one embodiment, video memory 95 can be configured to realize one or more frame buffers.In addition, ISP is handled
The output of device 91 can be transmitted to encoder/decoder 96, so as to encoding/decoding image data.The image data of coding can be protected
It deposits, and is decompressed before being shown in 97 equipment of display.Encoder/decoder 96 can be real by CPU or GPU or coprocessor
It is existing.
The statistical data that ISP processor 91 determines, which can be transmitted, gives control logic device Unit 92.For example, statistical data may include
The imaging sensors such as automatic exposure, automatic white balance, automatic focusing, flicker detection, black level compensation, 932 shadow correction of lens
934 statistical informations.Control logic device 92 may include the processing element and/or microcontroller for executing one or more routines (such as firmware)
Device, one or more routines can statistical data based on the received, determine the control parameter of camera 93 and the control of ISP processor 91
Parameter processed.For example, the control parameter of camera 93 may include 94 control parameter of sensor (such as the integral of gain, spectrum assignment
Time, stabilization parameter etc.), camera flash control parameter, 932 control parameter of lens (such as focus or zoom focal length) or
The combination of these parameters.ISP control parameter may include for automatic white balance and color adjustment (for example, during RGB processing)
932 shadow correction parameter of gain level and color correction matrix and lens.
For example, the following are the processor 60 used in Fig. 6 or with the image processing circuit 90 in Fig. 7 (at specially ISP
Manage device 91) realize control method the step of:
01: determining that present filming scene belongs to night scene scene；
02: according to the degree of jitter of imaging device, identifying the applicable night scene mode of present filming scene；
03: according to night scene mode, determining the exposure parameter of each frame image to be collected；
04: control is exposed using exposure parameter.
In order to realize above-described embodiment, the embodiment of the present invention also proposed a kind of computer readable storage medium, deposit thereon
Computer program is contained, when the instruction in the storage medium is performed by processor, realization is such as preceding method embodiment institute
The exposal control method stated.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from
Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (14)
1. a kind of exposal control method, which is characterized in that the described method comprises the following steps:
Determine that present filming scene belongs to night scene scene；
According to the degree of jitter of imaging device, the applicable night scene mode of present filming scene is identified；
According to the night scene mode, the exposure parameter of each frame image to be collected is determined；
Control is exposed using the exposure parameter.
2. exposal control method according to claim 1, which is characterized in that the degree of jitter according to imaging device,
Identify the applicable night scene mode of present filming scene, comprising:
Obtain the degree of jitter of imaging device；
If the degree of jitter is greater than or equal to the first dithering threshold, determines and use single frames night scene mode；
If the degree of jitter is less than first dithering threshold, and is greater than second jitter threshold, determine using hand-held night scene mould
Formula；
If the degree of jitter is less than or equal to the second jitter threshold, determines and use foot prop night scene mode；
Wherein, first dithering threshold is greater than the second jitter threshold, image to be collected under the hand-held night scene mode
Frame number is greater than a frame, and the frame number of image to be collected is greater than the frame number under the hand-held night scene mode under the foot prop night scene mode.
3. exposal control method according to claim 2, which is characterized in that it is described according to the night scene mode, it determines each
The exposure parameter of frame image to be collected, comprising:
According to the night scene mode, the preset sensitivity of each frame image to be collected is determined；
Wherein, the preset sensitivity is greater than the preset sense under the foot prop night scene mode under the hand-held night scene mode
Luminosity.
4. exposal control method according to claim 3, which is characterized in that it is described according to the night scene mode, it determines each
The exposure parameter of frame image to be collected, further includes:
According to the night scene mode, the preset exposure bias value of each frame image to be collected is determined；
According to the luminance information of the preview image, benchmark light exposure is determined；
According to the benchmark light exposure and the preset exposure bias value of each frame image to be collected, the mesh of each frame image to be collected is determined
Mark light exposure；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame is to be collected
The exposure time of image.
5. exposal control method according to claim 4, which is characterized in that
The value range of the exposure bias value is less than the exposure under the foot prop night scene mode under the hand-held night scene mode
The value range of offset.
6. exposal control method according to claim 2, which is characterized in that the degree of jitter for obtaining imaging device,
Include:
The sensor being arranged from imaging device, obtains collected displacement information；
According to institute's displacement information, the degree of jitter of the imaging device is determined.
7. exposal control method according to claim 2, which is characterized in that it is described according to the night scene mode, it determines each
The exposure parameter of frame image to be collected, comprising:
If reading corresponding relationship between degree of jitter and exposure parameter under hand-held night scene mode；
According to the degree of jitter of the imaging device, the corresponding relationship is inquired, obtains the exposure parameter of each frame image to be collected；
The exposure parameter includes exposure time, sensitivity, exposure bias value.
8. exposal control method according to claim 7, which is characterized in that
Sensitivity in the degree of jitter and the exposure parameter has positive relationship；
Exposure time in the degree of jitter and the exposure parameter has inverse relationship；
The value range of exposure bias value in the degree of jitter and the exposure parameter has inverse relationship.
9. exposal control method according to claim 1-8, which is characterized in that described to use the exposure parameter
It is exposed after control, further includes:
Obtain collected each frame image under the spectrum assignment；
Each frame image is synthesized, image is obtained.
10. exposal control method according to claim 1-8, which is characterized in that the determining current shooting field
Scape belongs to night scene scene, comprising:
Image characteristics extraction is carried out to the preview image；
The characteristics of image of extraction is inputted into identification model, current shooting field is determined according to the scene type that the identification model exports
Scape belongs to night scene scene；Wherein, the identification model has learnt to obtain the corresponding relationship between characteristics of image and scene type.
11. exposal control method according to claim 1-8, which is characterized in that the determining current shooting field
Scape belongs to night scene scene, comprising:
Detection is used for the user's operation of scene switching；
When detecting the user's operation for switching to night scene scene, ambient brightness is detected, to obtain luminance information；
According to the luminance information, determine that present filming scene belongs to night scene scene.
12. a kind of exposure-control device, which is characterized in that described device includes:
Scene determining module, for determining that present filming scene belongs to night scene scene；
Identification module identifies the applicable night scene mode of present filming scene for the degree of jitter according to imaging device；
Parameter determination module, for determining the exposure parameter of each frame image to be collected according to the night scene mode；
Control module, for being exposed control using the exposure parameter.
13. a kind of electronic equipment characterized by comprising memory, processor and storage are on a memory and can be in processor
The computer program of upper operation when the processor executes described program, realizes the exposure as described in any in claim 1-11
Light control method.
14. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The exposal control method as described in any in claim 1-11 is realized when execution.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810962773.6A CN109040609B (en) | 2018-08-22 | 2018-08-22 | Exposure control method, exposure control device, electronic equipment and computer-readable storage medium |
| PCT/CN2019/090476 WO2020038072A1 (en) | 2018-08-22 | 2019-06-10 | Exposure control method and device, and electronic device |
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| CN201810962773.6A CN109040609B (en) | 2018-08-22 | 2018-08-22 | Exposure control method, exposure control device, electronic equipment and computer-readable storage medium |
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| CN109040609B (en) | 2021-04-09 |
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