CN104754238B - A kind of image formation control method and device, imaging control system - Google Patents
A kind of image formation control method and device, imaging control system Download PDFInfo
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- CN104754238B CN104754238B CN201310754547.6A CN201310754547A CN104754238B CN 104754238 B CN104754238 B CN 104754238B CN 201310754547 A CN201310754547 A CN 201310754547A CN 104754238 B CN104754238 B CN 104754238B
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Abstract
A kind of image formation control method and device, imaging control system, method include：Imaging data of the imaging system under environment light condition is obtained, obtains imaging data of the imaging system under the first flash conditions；Based on the first coefficient and the second coefficient, imaging control parameters of the imaging system under the second flash conditions are determined, imaging control parameters include at least one of time for exposure, gain parameter and white balance parameter；First coefficient is the proportionality coefficient of the imaging data under imaging data and environment light condition under the first flash conditions, and the second coefficient is the proportionality coefficient of the light output amount and the light output amount of the second flash conditions of the first flash conditions；Light output amount under second flash conditions is more than the light output amount under the first flash conditions.The time that brightness of flash lamp maintains the second flash conditions can be reduced, effectively reduces the loss to flash lamp, and without auxiliary elements such as rangefinders, effectively reduce hardware cost, be easy to realize on mobile terminals.
Description
Technical field
The present invention relates to digital technology field, more particularly to a kind of image formation control method and device, imaging system.
Background technology
With the rapid popularization of the imaging devices such as high-resolution digital camera, smart mobile phone, user is to image quality
It is required that also more and more higher, the imaging control parameters for accurately controlling imaging device are ultimately imaged the important hand of quality as raising
Section.Time for exposure, gain parameter, white balance parameter when the imaging control parameters of the imaging device generally include to be imaged etc..
The exposure is the physical quantity for describing the luminous flux size that imaging device is reached from the scenery being taken, in imaging device certainly
During dynamic exposure, imaging device can prevent image exposure excessively or expose according to the strong and weak adjust automatically light exposure of shooting light
The length of time for exposure when light deficiency, the light exposure and imaging is relevant.In different-colour light environment, imaging device is clapped
Colour cast can occur for the white scenery taken the photograph, for example, the color of the white scenery shot under high color temperature environment is partially blue, in low colour temperature ring
The color of the white scenery shot under border is partially red, by the adjustment of white balance parameter can under any colour temperature it is captured
The color of white scenery is all white.Adjustment for the sensitivity of imaging device can be real by the adjustment to gain parameter
Existing, increase gain can improves the sensitivity of imaging device.
The imaging control parameters for accurately controlling imaging device are ultimately imaged one of key parameter of quality as raising, lead to
Often, when imaging device is imaged, can in real time to when the progresss light-metering of preceding flash lamp is to determine exposure information etc. when being imaged,
But prior art is when obtaining the imaging datas such as time for exposure, gain parameter and white balance parameter when being imaged, it is necessary to use
The auxiliary elements such as rangefinder, hardware cost is higher, and because when the flash lamp of imaging device is in highlighted, current strength is larger,
During imaging parameters are obtained, flash lamp is in highlighted state for a long time, the performance of flash lamp can be produced necessarily
Influence.
The content of the invention
The present invention solves the problems, such as be existing imaging system acquisition imaging control parameters hardware cost it is higher and glistening
The problem of lamp can impact when highlighted for a long time to the performance of flash lamp.
To solve the above problems, the present invention provides a kind of image formation control method, methods described includes：
Imaging data of the imaging system under environment light condition is obtained, the imaging data includes the time for exposure, gain is joined
Number and brightness of image；
Obtain imaging data of the imaging system under the first flash conditions；
Based on the first coefficient and the second coefficient, imaging control parameters of the imaging system under the second flash conditions, institute are determined
Stating imaging control parameters includes at least one of time for exposure, gain parameter and white balance parameter；First coefficient is the
The proportionality coefficient of the imaging data under imaging data and environment light condition under one flash conditions, second coefficient are the first sudden strain of a muscle
The proportionality coefficient of the light output amount of optical condition and the light output amount of the second flash conditions；
Light output amount under second flash conditions is more than the light output amount under first flash conditions.
Optionally, the gain parameter, brightness of image and the product of time for exposure are constant.
Optionally, obtaining imaging data includes：
Obtain the brightness of image in imaging data；
Based on acquired brightness of image, time for exposure and the gain ginseng in the imaging data are obtained using AE algorithms
Number.
Optionally, the processing speed of AE algorithms used by imaging data of the imaging system under the first flash conditions is obtained
More than the processing speed for obtaining imaging system AE algorithms used by the imaging data under environment light condition.
Optionally, the imaging data for obtaining imaging system under environment light condition includes：Based on formula L0 × Gain0
× T0=Const, the time for exposure T0 in the imaging data under environment light condition is obtained using AE algorithms and gain is joined
Number Gain0, L0 are the brightness of image in the imaging data under environment light condition；
The imaging data that imaging system is obtained under the first flash conditions includes：Based on formula L1 × Gain1 × T1
=Const, time for exposure T1 and gain parameter in the imaging data under the first flash conditions are obtained using AE algorithms
Gain1, L1 are the brightness of image in the imaging data under the first flash conditions, and Const is constant.
Optionally, first coefficient is directly proportional to brightness of image ratio and is associated with described under the first flash conditions
Time for exposure and gain parameter or association in imaging data and the exposure in the imaging data under environment light condition
Time and gain parameter.
Optionally, it is described to be based on the first coefficient and the second coefficient, determine imaging of the imaging system under the second flash conditions
Control parameter includes：
Based on formula L2 → (1+ α × β) × LpObtaining brightness of image L2, α of the imaging system under the second flash conditions is
First coefficient, β are the second coefficient, and α is associated with time for exposure and gain in the imaging data under the first flash conditions
Parameter and LpIt is associated with for the brightness of image in the imaging data under the first flash conditions or α described in environment striation
Time for exposure in imaging data and gain parameter and L under partpFor the figure in the imaging data under environment light condition
Image brightness；
Based on formula L2 × Gain2 × T2=Const, determine the imaging system in the second flash conditions using AE algorithms
Under imaging control parameters in time for exposure T2 and gain parameter Gain2；
Const is constant, → represent that the symbol left part is directly proportional to right part.
Optionally, the imaging data includes white balance parameter；It is described to be based on the first coefficient and the second coefficient, it is determined that imaging
Imaging control parameters of the system under the second flash conditions include：
Based on formula W B → WBp× (1+ α × β), determine imaging control of the imaging system under the second flash conditions
White balance parameter WB, α in parameter are the first coefficient, and β is the second coefficient, α be associated with it is described under the first flash conditions into
As the time for exposure in data and gain parameter and WBpFor the white balance parameter in the imaging data under the first flash conditions or
Person α is associated with the time for exposure in the imaging data under environment light condition and gain parameter and WBpFor in environment striation
The white balance parameter in imaging data under part, wherein, → represent that the symbol left part is directly proportional to right part.
Optionally, methods described also includes：The imaging system is configured based on identified imaging control parameters, with control
The imaging system is shot.
Technical solution of the present invention also provides a kind of imaging control apparatus, and described device includes：
First acquisition unit, suitable for obtaining imaging data of the imaging system under environment light condition, the imaging data bag
Include time for exposure, gain parameter and brightness of image；
Second acquisition unit, suitable for obtaining imaging data of the imaging system under the first flash conditions；
Determining unit, suitable for based on the first coefficient and the second coefficient, determine imaging system under the second flash conditions into
As control parameter, the imaging control parameters include at least one of time for exposure, gain parameter and white balance parameter；It is described
First coefficient be the first flash conditions under imaging data and environment light condition under imaging data proportionality coefficient, described second
Coefficient is the proportionality coefficient of the light output amount and the light output amount of the second flash conditions of the first flash conditions；
Light output amount under second flash conditions is more than the light output amount under first flash conditions.
Optionally, first coefficient is directly proportional to brightness of image ratio and is associated with described under the first flash conditions
Time for exposure and gain parameter or association in imaging data and the exposure in the imaging data under environment light condition
Time and gain parameter.
Optionally, the determining unit includes：
First obtain subelement, suitable for based on formula L2 → (1+ α × β) × LpImaging system is obtained in the second flash conditions
Under brightness of image L2, α be the first coefficient, β is the second coefficient, and α is associated with the imaging data under the first flash conditions
In time for exposure and gain parameter and LpClosed for the brightness of image in the imaging data under the first flash conditions or α
It is coupled to the time for exposure in the imaging data under environment light condition and gain parameter and LpTo be described in environment light condition
Under imaging data in brightness of image；
Second obtains subelement, suitable for based on formula L2 × Gain2 × T2=Const, using AE algorithms determine it is described into
As the time for exposure T2 and gain parameter Gain2 in imaging control parameters of the system under the second flash conditions；
Const is constant, → represent that the symbol left part is directly proportional to right part.
Optionally, the imaging data includes white balance parameter；The determining unit includes：
3rd obtains subelement, suitable for based on formula W B → WBp× (1+ α × β), determine that the imaging system is dodged second
White balance parameter WB, α in imaging control parameters under optical condition are the first coefficient, and β is the second coefficient, α be associated with it is described
Time for exposure in imaging data and gain parameter and WB under first flash conditionspFor the imaging number under the first flash conditions
White balance parameter or α in are associated with the time for exposure in the imaging data under environment light condition and gain parameter
And WBpFor the white balance parameter in the imaging data under environment light condition, wherein, → represent the symbol left part and right side
Part is directly proportional.
Optionally, described device also includes：Control unit, suitable for based on identified imaging control parameters configuration it is described into
As system, to control the imaging system to be shot.
Technical solution of the present invention also provides a kind of imaging control system, including flash lamp, and the system also includes：As above institute
The imaging control apparatus stated.
Compared with prior art, technical scheme has advantages below：
Based on the first coefficient and the second coefficient, imaging control parameters of the imaging system under the second flash conditions, institute are determined
Proportionality coefficient of first coefficient for the imaging data under the first flash conditions and under environment light condition is stated, second coefficient is
The proportionality coefficient of the light output amount of first flash conditions and the light output amount of the second flash conditions, this method are obtaining imaging system
After imaging control parameters under the second flash conditions, imaging system can be directly based upon the imaging control parameters carry out into
Picture, due to need not be after flash lamp is opened, imaging system passes through imaging system and calculated and obtain again based on current illumination condition
Imaging control parameters, it is possible to effectively reduce the time that brightness of flash lamp maintains the second flash conditions, reduce to flash lamp
Loss, improve the service life of flash lamp, effectively improve its performance, and the imaging system aids in member without rangefinder etc.
Part, you can obtain in different illumination conditions（First flash conditions, environment light condition, the second flash conditions）Under imaging data or
Imaging control parameters, effectively reduce the hardware cost of system.
The faster AE algorithms of processing speed are used when obtaining imaging data of the imaging system under the first flash conditions, can
So that AE algorithms realize Fast Convergent, and then the imaging data that can be rapidly obtained under the first flash conditions so that into
As the depth of exposure immediate stability of system, processing time is effectively reduced.
This method, without auxiliary elements such as rangefinders, is easy to mobile whole when imaging system obtains imaging control parameters
Realized on end.
Brief description of the drawings
Fig. 1 is the schematic flow sheet for the image formation control method that technical solution of the present invention provides；
Fig. 2 is the schematic flow sheet of image formation control method provided in an embodiment of the present invention.
Embodiment
In the prior art, the process of imaging system images is typically：It is primarily based on acquired in the auxiliary elements such as rangefinder
Data, pass through time for exposure, gain parameter and white balance correction of imaging system under the conditions of calculating acquisition current light etc.
Dependent imaging control parameter；Then imaging system is entered based on the imaging control parameters being calculated under the conditions of current light
Row shooting.
There is imaging system when obtaining imaging control parameters in prior art, hardware cost is higher and in flash lamp long-time
The problem of performance of flash lamp being impacted when highlighted.
To solve the above problems, technical solution of the present invention provides a kind of image formation control method.Carried in the technology of the present invention method
In the image formation control method of confession, based on when not opening flash lamp, acquired imaging data and dodged under environment light condition
Acquired imaging data under the first relatively low flash conditions of light lamp brightness, and then obtain in the second higher sudden strain of a muscle of brightness of flash lamp
Imaging control parameters under optical condition.
Fig. 1 is the schematic flow sheet for the image formation control method that technical solution of the present invention provides, as shown in figure 1, being first carried out
Step S101, obtain imaging data of the imaging system under environment light condition.
Refer to imaging system under the environment light condition when not opening flash lamp, the light of the imaging circumstances residing for imaging system
Lines part, for example, when imaging system carries out preview, flash lamp is generally not turned on, is now environment light condition.The flash lamp
Typically refer to the LED in imaging system.
When imaging system is shot to scene, it will usually which, based on current light conditions, imaging system, which obtains, to be used for
The imaging control parameters of shooting, in order to be obtained under current light condition based on this parameter, imaging system, exposure is closed
Suitable imaging effect.Described imaging control parameters generally include imaging when time for exposure, white balance parameter, sensitivity and
Gain parameter for compensating adjustment to image etc..
It is acquired under environment light condition and under the first flash conditions based on imaging system in present specification
Time for exposure, gain parameter and brightness of image etc., it is possible to obtain when imaging system is imaged under the second flash conditions
Time for exposure, gain parameter and white balance parameter etc..In present specification, by under environment light condition and the first flash conditions
Lower accessed time for exposure, gain parameter and brightness of image etc. is referred to as imaging data, will be used to controlling imaging system the
Time for exposure, gain parameter and white balance parameter for being imaged under two flash conditions etc. are referred to as imaging control parameters.
The acquisition of brightness of image in the imaging data can use a variety of methods known to a person skilled in the art
Obtained, the time for exposure and gain parameter in the imaging data can be based on automatic exposure（AE, Auto Exposure）
Algorithm is obtained.
Step S102 is performed, obtains imaging data of the imaging system under the first flash conditions.
Under the first relatively low flash conditions of brightness of flash lamp, the figure in the imaging data under the first flash conditions is obtained
Image brightness, and then the time for exposure in the imaging data based on the acquisition of AE algorithms under the first flash conditions and gain parameter.
Under the first flash conditions and under environment light condition, when obtaining time for exposure and the gain parameter in imaging data
Different AE algorithms can be used.
Perform step S103, based on the first coefficient and the second coefficient, determine imaging system under the second flash conditions into
As control parameter.
First coefficient is the ratio of the imaging data under imaging data and environment light condition under the first flash conditions
Coefficient, second coefficient are the proportionality coefficient of the light output amount and the light output amount of the second flash conditions of the first flash conditions.
Light output amount of the flash lamp of imaging system under the second flash conditions is more than the light under first flash conditions
Output quantity.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Fig. 2 is the schematic flow sheet of image formation control method provided in an embodiment of the present invention, as shown in Fig. 2 being first carried out walking
Rapid S201, obtain brightness of image of the imaging system in the imaging data under environment light condition.
Imaging system can be obtained when not opening flash lamp by the image processing hardware accelerating module in imaging system
The now brightness of the image acquired in imaging system, such as when imaging system carries out preview, obtain the image acquired in preview
Brightness.
Perform step S202, based on AE algorithms obtain time for exposure in imaging system imaging data under ambient light and
Gain parameter.
Because gain parameter, brightness of image and the product of time for exposure of imaging system are usually a constant, so can
Based on acquired brightness of image, to pass through formula（1）Obtain exposure of the imaging system in the imaging data under environment light condition
T0 and gain parameter Gain0 between light time.
L0 × Gain0 × T0=Const（1）
Wherein, L0 is brightness of image of the imaging system in the imaging data under environment light condition, and Const is constant.Base
In formula（1）, when the time for exposure T0 and gain parameter Gain0 in the imaging data of imaging system can be obtained by AE algorithms,.
Formula（1）Be meant that, imaging system when being shot to scene, gain parameter in imaging data,
Brightness of image and the product of time for exposure are typically that the constant can be with base by a imaging system identified constant in itself
It is determined in systematic parameters such as the aperture sizes of the imaging system.
The AE algorithms can use the automatic exposure algorithm of acquisition imaging system well-known to those skilled in the art.
Exposure of the imaging system in the imaging data under environment light condition is being obtained based on step S201 and step S202
After time, gain parameter and brightness of image, this imaging data can be preserved.
Step S203 is performed, obtains the brightness of image in imaging data of the imaging system under the first flash conditions.
Imaging system is being got after the imaging data under environment light condition, is opening flash lamp, now flash lamp is bright
Degree can be relatively more dark, it is understood that to be imaging system is in preflashing state, now will be in brightness by flash lamp
Relatively low photoenvironment is referred to as the first flash conditions.
Step S204 is performed, is obtained based on quick AE algorithms in imaging data of the imaging system under the first flash conditions
Time for exposure and gain parameter.
Using the method similar with step S202, the exposure in imaging data of the imaging system under the first flash conditions is obtained
T1 and gain parameter Gain1 between light time, the gain parameter, image in imaging data of the imaging system under the first flash conditions are bright
The product of degree and time for exposure are similarly the constant Const, in imaging data of the imaging system under the first flash conditions
Brightness of image L1, time for exposure T1 and gain parameter Gain1 meet formula（2）.
L1 × Gain1 × T1=Const（2）
Time for exposure T1 and gain parameter Gain1 in imaging data of the imaging system under the first flash conditions can
So that using the AE algorithms as described in step S202, quick AE algorithms can also be used.
Currently widely used AE algorithms are mainly based upon 18% and are taken in the mobile hand-held device containing imaging function
The reflecting rate of scene obtain the suitable exposure value of image, the quick AE algorithms refer to be changed on the AE algorithms of routine
After entering, the faster AE algorithms of processing speed are performed, also there are a variety of quick AE algorithms in the prior art, for example, according to image
Object brightness, in the processing procedure of AE modules, it can quickly obtain time for exposure, gain parameter etc., the quick AE algorithms
It is equally applicable in the imaging systems such as digital camera.
When obtaining imaging data of the imaging system under the first flash conditions, using processing speed, quick AE is calculated faster
Method, AE algorithms can be made to realize Fast Convergent, and then the imaging data that can be rapidly obtained under the first flash conditions, made
Obtain the depth of exposure immediate stability of imaging system.
Gain parameter, brightness of image and the product of time for exposure in imaging data are determined in itself by the imaging system
A constant, under different light, the constant is constant, that is to say, that formula（2）With formula（1）In constant be same
Individual constant.
Equally in imaging data of the imaging system under the first flash conditions is obtained based on step S203 and step S204
Time for exposure, after gain parameter and brightness of image, this imaging data can be preserved.
Perform step S205, the ratio based on the imaging data under the imaging data and environment light condition under the first flash conditions
Example coefficient determines the first coefficient.
First coefficient is directly proportional to brightness of image ratio and is associated with the imaging number under the first flash conditions
Time for exposure and gain parameter in or association and the time for exposure in the imaging data under environment light condition and
Gain parameter.
For example, when brightness of image of the imaging system in the imaging data under environment light condition is L0, in the first flash strip
The brightness of image in imaging data under part is L1, then first factor alpha and L0 and L1 ratio direct proportionality, are having
When body determines the first factor alpha, can the multiple actual imaging effect based on imaging system determine or according to imaging system be
System parameter determines the proportionality coefficient in the proportional relationship.
First coefficient is also associated with time for exposure and gain parameter in the imaging data under the first flash conditions
Or association and the time for exposure in the imaging data under environment light condition and gain parameter.
Step S206 is performed, the ratio of the light output amount based on the first flash conditions and the light output amount of the second flash conditions
Coefficient determines the second coefficient.
Light output amount under the different light conditions of optical pickup apparatus acquisition imaging system that can be based on imaging system,
In the present embodiment, the brightness of the second flash conditions glitter down lamp relative to the first flash conditions glitter down lamp brightness relatively
Bright, i.e. light output amount under the second flash conditions is more than the light output under first flash conditions, second flash conditions
It can be appreciated that it is imaging system is in main sudden strain of a muscle state.
After light output amount under the light output amount under obtaining the first flash conditions and the second flash conditions, pass through first
The ratio of light output amount and the light output amount under the second flash conditions under flash conditions can determine second coefficient, example
Such as, second coefficient can be the ratio of the light output amount and the light output amount under the second flash conditions under the first flash conditions
Value or with the ratio direct proportionality.
Perform step S207, based on the first coefficient and the second coefficient, determine imaging system under the second flash conditions into
As control parameter.
Based on formula（3）Obtain brightness of image L2 of the imaging system under the second flash conditions.
L2→(1+α×β)×Lp（3）
α is the first coefficient, and β is the second coefficient, LpIt is bright for the image in the imaging data under the first flash conditions
The brightness of image in imaging data under degree or environment light condition, → represent the symbol left part with right part into just
Than.
For example, when the time for exposure in the imaging data that α is associated with the first flash conditions and gain parameter,
LpFor the brightness of image in the imaging data under the first flash conditions, when α is associated with the imaging under environment light condition
When time for exposure in data and gain parameter, LpFor the brightness of image in the imaging data under environment light condition.
Formula（3）Represent the imaging system brightness of image L2 under the second flash conditions and (1+ α × β) × LpValue into just
Proportionate relationship, the direct ratio can be determined based on the systematic parameter of multiple the actual imaging effect and imaging system of imaging system
Proportionality coefficient in example relation.
After brightness of image L2 of the imaging system under the second flash conditions is obtained, formula can be based on（4）, calculated using AE
Method determines time for exposure T2 and gain parameter in imaging control parameters of the imaging system under the second flash conditions
Gain2。
L2 × Gain2 × T2=Const（4）
Gain parameter Gain2, brightness of image L2 and exposure in imaging data of the imaging system under the second flash conditions
Time T2 product is similarly constant Const as described above.
The AE algorithms can be conventional AE algorithms, or quick AE algorithms, not limit herein.
Based on formula（5）Determine the white balance ginseng in imaging control parameters of the imaging system under the second flash conditions
Number WB.
WB→WBp×(1+α×β) （5）
WBpFor the white balance parameter in the imaging data under the first flash conditions or under the environment light condition into
As the white balance parameter in data.
For example, when the time for exposure in the imaging data that α is associated with the first flash conditions and gain parameter,
WBpFor the white balance parameter in the imaging data under the first flash conditions, when α be associated with environment light condition into
During as the time for exposure in data and gain parameter, WBpFor the white balance ginseng in the imaging data under environment light condition
Number.
Formula（5）Represent white balance parameter WB and WB of the imaging system under the second flash conditionsp× (1+ α × β) value
Direct proportionality, can based on multiple the actual imaging effect and imaging system of imaging system systematic parameter determine described in
Proportionality coefficient in proportional relationship.
Based on formula（3）To and formula（5）Can imaging system need scene is shot under the second flash conditions when,
Before the flash lamp of the second flash conditions is not opened, it is possible to obtain the imaging control being imaged under the second flash conditions
Parameter.
Step S208 is performed, the imaging system is configured based on identified imaging control parameters, controls the imaging system
System is shot.
In this step, the imaging under the second flash conditions obtained in step S207 can be controlled ginseng by imaging system
Number is configured in imaging system, and imaging system can be directly based upon the imaging control parameters and scene is imaged.
Because flash lamp is when highlighted, electric current is bigger, should not open for a long time, in step S208, because imaging is
System is after flash lamp is opened, and without calculating the imaging control parameters under the second flash conditions, directly can use in step S207
Resulting imaging control parameters, the time that brightness of flash lamp maintains the second flash conditions can be effectively reduced, reduced to dodging
The loss of light lamp, improve the service life of flash lamp.
It should be noted that due to the mobile hand-held device containing imaging function, such as mobile phone, generally machinery is not fast
Door, so the mobile handheld terminal controls the big of light exposure typically by the length and gain parameter that change the time for exposure
It is small, and the size of light exposure can not be controlled by f-number as digital camera, the method that the present embodiment is provided is without extra
The auxiliary element such as light-metering, and algorithm is simple, is easy to realize on mobile hand-held device.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from
In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (17)
- A kind of 1. image formation control method, it is characterised in that including：Obtain imaging data of the imaging system under environment light condition, the imaging data include the time for exposure, gain parameter and Brightness of image；Obtain imaging data of the imaging system under the first flash conditions；Based on the first coefficient and the second coefficient, determine imaging control parameters of the imaging system under the second flash conditions, it is described into As control parameter includes at least one of time for exposure, gain parameter and white balance parameter；First coefficient is the first sudden strain of a muscle The proportionality coefficient of the imaging data under imaging data and environment light condition under optical condition, first coefficient and brightness of image ratio It is worth time for exposure that is directly proportional and being associated with the imaging data under the first flash conditions and gain parameter or association Time for exposure and gain parameter in the imaging data under environment light condition, second coefficient are the first flash strip The proportionality coefficient of the light output amount of part and the light output amount of the second flash conditions；Light output amount under second flash conditions is more than the light output amount under first flash conditions；Wherein, it is described to be based on the first coefficient and the second coefficient, determine imaging control ginseng of the imaging system under the second flash conditions Number includes：Based on formula L2 → (1+ α × β) × LpIt is the first system to obtain brightness of image L2, α of the imaging system under the second flash conditions Number, β be the second coefficient, α be associated with described in time for exposure in imaging data under the first flash conditions and gain parameter and LpIt is associated with for the brightness of image in the imaging data under the first flash conditions or α described under environment light condition Time for exposure and gain parameter and L in imaging datapFor the brightness of image in the imaging data under environment light condition；Based on formula L2 × Gain2 × T2=Const, determine the imaging system under the second flash conditions using AE algorithms Time for exposure T2 and gain parameter Gain2 in imaging control parameters；Const is constant, → represent that the symbol left part is directly proportional to right part；When the time for exposure in the imaging data that α is associated with the first flash conditions and gain parameter, LpTo be described first The brightness of image in imaging data under flash conditions, when α is associated with the exposure in the imaging data under environment light condition Between and during gain parameter, LpFor the brightness of image in the imaging data under environment light condition.
- 2. image formation control method as claimed in claim 1, it is characterised in that when the gain parameter, brightness of image and exposure Between product be constant.
- 3. image formation control method as claimed in claim 1, it is characterised in that obtaining imaging data includes：Obtain the brightness of image in imaging data；Based on acquired brightness of image, time for exposure and the gain parameter in the imaging data are obtained using AE algorithms.
- 4. image formation control method as claimed in claim 3, it is characterised in that obtain imaging system under the first flash conditions The processing speed of AE algorithms is more than imaging data of the acquisition imaging system under environment light condition and adopted used by imaging data The processing speed of AE algorithms.
- 5. image formation control method as claimed in claim 3, it is characterised in thatThe imaging data that imaging system is obtained under environment light condition includes：Based on formula L0 × Gain0 × T0= Const, the time for exposure T0 and gain parameter in the imaging data under environment light condition is obtained using AE algorithms Gain0, L0 are the brightness of image in the imaging data under environment light condition；The imaging data that imaging system is obtained under the first flash conditions includes：Based on formula L1 × Gain1 × T1= Const, time for exposure T1 and gain parameter in the imaging data under the first flash conditions are obtained using AE algorithms Gain1, L1 are the brightness of image in the imaging data under the first flash conditions, and Const is constant.
- 6. image formation control method as claimed in claim 1, it is characterised in that also include：Based on identified imaging control ginseng Number configures the imaging system, to control the imaging system to be shot.
- A kind of 7. image formation control method, it is characterised in that including：Obtain imaging data of the imaging system under environment light condition, the imaging data include the time for exposure, gain parameter and Brightness of image；Obtain imaging data of the imaging system under the first flash conditions；Based on the first coefficient and the second coefficient, determine imaging control parameters of the imaging system under the second flash conditions, it is described into As control parameter includes at least one of time for exposure, gain parameter and white balance parameter；First coefficient is the first sudden strain of a muscle The proportionality coefficient of the imaging data under imaging data and environment light condition under optical condition, first coefficient and brightness of image ratio It is worth time for exposure that is directly proportional and being associated with the imaging data under the first flash conditions and gain parameter or association Time for exposure and gain parameter in the imaging data under environment light condition, second coefficient are the first flash strip The proportionality coefficient of the light output amount of part and the light output amount of the second flash conditions；Light output amount under second flash conditions is more than the light output amount under first flash conditions；Wherein, the imaging data includes white balance parameter；It is described to be based on the first coefficient and the second coefficient, determine that imaging system exists Imaging control parameters under second flash conditions include：Based on formula W B → WBp× (1+ α × β), is determined in imaging control parameters of the imaging system under the second flash conditions White balance parameter WB, α be the first coefficient, β is the second coefficient, and α is associated with the imaging data under the first flash conditions In time for exposure and gain parameter and WBpClosed for the white balance parameter in the imaging data under the first flash conditions or α It is coupled to the time for exposure in the imaging data under environment light condition and gain parameter and WBpFor under environment light condition White balance parameter in imaging data, → represent that the symbol left part is directly proportional to right part；When the time for exposure in the imaging data that α is associated with the first flash conditions and gain parameter, WBpTo be described The white balance parameter in imaging data under one flash conditions, when α is associated with the exposure in the imaging data under environment light condition When between the light time with gain parameter, WBpFor the white balance parameter in the imaging data under environment light condition.
- 8. the image formation control method as described in claim requirement 7, it is characterised in that the gain parameter, brightness of image and exposure Product between light time is constant.
- 9. image formation control method as claimed in claim 7, it is characterised in that obtaining imaging data includes：Obtain the brightness of image in imaging data；Based on acquired brightness of image, time for exposure and the gain parameter in the imaging data are obtained using AE algorithms.
- 10. image formation control method as claimed in claim 9, it is characterised in that obtain imaging system under the first flash conditions Imaging data used by the processing speeds of AE algorithms be more than and obtain imaging data institute of the imaging system under environment light condition The processing speed of the AE algorithms of use.
- 11. image formation control method as claimed in claim 9, it is characterised in thatThe imaging data that imaging system is obtained under environment light condition includes：Based on formula L0 × Gain0 × T0= Const, the time for exposure T0 and gain parameter in the imaging data under environment light condition is obtained using AE algorithms Gain0, L0 are the brightness of image in the imaging data under environment light condition；The imaging data that imaging system is obtained under the first flash conditions includes：Based on formula L1 × Gain1 × T1= Const, time for exposure T1 and gain parameter in the imaging data under the first flash conditions are obtained using AE algorithms Gain1, L1 are the brightness of image in the imaging data under the first flash conditions, and Const is constant.
- 12. image formation control method as claimed in claim 7, it is characterised in that also include：Based on identified imaging control ginseng Number configures the imaging system, to control the imaging system to be shot.
- A kind of 13. imaging control apparatus, it is characterised in that including：First acquisition unit, suitable for obtaining imaging data of the imaging system under environment light condition, the imaging data includes exposing Between light time, gain parameter and brightness of image；Second acquisition unit, suitable for obtaining imaging data of the imaging system under the first flash conditions；Determining unit, suitable for based on the first coefficient and the second coefficient, determining imaging control of the imaging system under the second flash conditions Parameter processed, the imaging control parameters include at least one of time for exposure, gain parameter and white balance parameter；Described first Coefficient be the first flash conditions under imaging data and environment light condition under imaging data proportionality coefficient, first coefficient And the time for exposure that is associated with the imaging data under first flash conditions and gain directly proportional to brightness of image ratio Parameter is associated with the time for exposure in the imaging data under environment light condition and gain parameter, second coefficient For the proportionality coefficient of the light output amount and the light output amount of the second flash conditions of the first flash conditions；Light output amount under second flash conditions is more than the light output amount under first flash conditions；Wherein, the determining unit includes：First obtain subelement, suitable for based on formula L2 → (1+ α × β) × LpImaging system is obtained under the second flash conditions Brightness of image L2, α are the first coefficient, and β is the second coefficient, and α is associated with the imaging data under the first flash conditions Time for exposure and gain parameter and LpIt is associated with for the brightness of image in the imaging data under the first flash conditions or α Time for exposure and gain parameter and L in the imaging data under environment light conditionpTo be described under environment light condition Brightness of image in imaging data；Second obtains subelement, suitable for based on formula L2 × Gain2 × T2=Const, determining that the imaging is using AE algorithms Time for exposure T2 and gain parameter Gain2 in the imaging control parameters united under the second flash conditions；Const is constant, → represent that the symbol left part is directly proportional to right part；When the time for exposure in the imaging data that α is associated with the first flash conditions and gain parameter, LpTo be described first The brightness of image in imaging data under flash conditions, when α is associated with the exposure in the imaging data under environment light condition Between and during gain parameter, LpFor the brightness of image in the imaging data under environment light condition.
- 14. imaging control apparatus as claimed in claim 13, it is characterised in that also include：Control unit, suitable for based on really Fixed imaging control parameters configure the imaging system, to control the imaging system to be shot.
- A kind of 15. imaging control apparatus, it is characterised in that including：First acquisition unit, suitable for obtaining imaging data of the imaging system under environment light condition, the imaging data includes exposing Between light time, gain parameter and brightness of image；Second acquisition unit, suitable for obtaining imaging data of the imaging system under the first flash conditions；Determining unit, suitable for based on the first coefficient and the second coefficient, determining imaging control of the imaging system under the second flash conditions Parameter processed, the imaging control parameters include at least one of time for exposure, gain parameter and white balance parameter；Described first Coefficient be the first flash conditions under imaging data and environment light condition under imaging data proportionality coefficient, first coefficient And the time for exposure that is associated with the imaging data under first flash conditions and gain directly proportional to brightness of image ratio Parameter is associated with the time for exposure in the imaging data under environment light condition and gain parameter, second coefficient For the proportionality coefficient of the light output amount and the light output amount of the second flash conditions of the first flash conditions；Light output amount under second flash conditions is more than the light output amount under first flash conditions；Wherein, the imaging data includes white balance parameter；The determining unit includes：3rd obtains subelement, suitable for based on formula W B → WBp× (1+ α × β), determines the imaging system in the second flash strip White balance parameter WB, α in imaging control parameters under part are the first coefficient, and β is the second coefficient, and α is associated with described first Time for exposure in imaging data and gain parameter and WB under flash conditionspFor in the imaging data under the first flash conditions White balance parameter or α be associated with the time for exposure in the imaging data under environment light condition and gain parameter and WBpFor the white balance parameter in the imaging data under environment light condition, wherein, → represent the symbol left part and right side It is divided into direct ratio；When the time for exposure in the imaging data that α is associated with the first flash conditions and gain parameter, WBpTo be described The white balance parameter in imaging data under one flash conditions, when α is associated with the exposure in the imaging data under environment light condition When between the light time with gain parameter, WBpFor the white balance parameter in the imaging data under environment light condition.
- 16. imaging control apparatus as claimed in claim 15, it is characterised in that also include：Control unit, suitable for based on really Fixed imaging control parameters configure the imaging system, to control the imaging system to be shot.
- 17. a kind of imaging control system, including flash lamp, it is characterised in that also include：Such as any one of claim 13 to 16 institute The imaging control apparatus stated.
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| CN110944116B (en) * | 2019-11-08 | 2021-06-25 | 瑞芯微电子股份有限公司 | Single flash compensation method, apparatus, device and medium based on white balance |
| CN111935415B (en) * | 2020-08-18 | 2022-02-08 | 浙江大华技术股份有限公司 | Brightness adjusting method and device, storage medium and electronic device |
| CN112351214B (en) * | 2020-09-22 | 2022-05-06 | 智博汽车科技(上海)有限公司 | Method and device for assisting face image acquisition, readable storage medium and vehicle |
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