CN106161976A - Auto iris control method and device for protection and monitor field - Google Patents
Auto iris control method and device for protection and monitor field Download PDFInfo
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- CN106161976A CN106161976A CN201610463508.4A CN201610463508A CN106161976A CN 106161976 A CN106161976 A CN 106161976A CN 201610463508 A CN201610463508 A CN 201610463508A CN 106161976 A CN106161976 A CN 106161976A
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- 230000008676 import Effects 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 230000001154 acute effect Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 13
- 230000008859 change Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- 238000004891 communication Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/085—Analogue circuits for control of aperture
-
- 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
-
- 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
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
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Abstract
The present invention is applicable to safety monitoring technical field, provide the auto iris control method for protection and monitor field and device, including: obtaining current luminance errors value, described luminance errors value is the average brightness value difference with the target brightness value preset of the real-time pictures that video camera currently obtains；Based on described luminance errors value, use non-linearity PID, use non-linearity PID algorithm to calculate incremental timestamp operator；Import described incremental timestamp operator, be calculated the value driving PWM；Value according to described driving PWM carries out auto iris control to described video camera.The present invention can automatically control aperture folding in the case of CCTV camera runs into ambient brightness acute variation, to reach suitable exposure effect, and whole regulation process fast and stable, improve the video frequency output effect of safety monitoring.
Description
Technical field
The invention belongs to safety monitoring technical field, particularly for the auto iris control method of protection and monitor field
And device.
Background technology
In protection and monitor field, especially road monitoring, the technical field such as tunnel monitoring, inevitably environment
The situation that bright dark change is violent, in order to adapt to the light change during above-mentioned monitoring, the auto iris of CCTV camera controls
Function substantially can the control strategy of adoption rate-Integrated Derivative (PID), conventional strategy is that traditional Position Form PID controls, or
Person's similar position formula PID controls to combine ladder variable step and controls.
But, above-mentioned auto iris control strategy, when in the face of ambient brightness change violent situation, the most all can occur
Auto iris regulation slowly and occurs overregulating so that aperture is fully closed or the most acutely shakes, and have impact on safety monitoring
Video frequency output effect.
Summary of the invention
In view of this, embodiments provide the auto iris control method for protection and monitor field and device,
There will be auto iris regulation when carrying out auto iris and controlling with solution prior art slowly and to occur overregulating so that light
Enclose fully closed or the most acutely shake, the problem that have impact on the video frequency output effect of safety monitoring.
First aspect, it is provided that a kind of auto iris control method for protection and monitor field, including:
Obtaining current luminance errors value, described luminance errors value is the brightest of the real-time pictures that currently obtains of video camera
Angle value and the difference of default target brightness value；
Based on described luminance errors value, non-linearity PID algorithm is used to calculate incremental timestamp operator；
Import described incremental timestamp operator, be calculated the value driving PWM；
Value according to described driving PWM carries out auto iris control to described video camera.
Second aspect, it is provided that a kind of auto iris for protection and monitor field controls device, including:
Acquiring unit, for obtaining current luminance errors value, described luminance errors value is the reality that video camera currently obtains
Time the average brightness value of picture and the difference of target brightness value preset；
First computing unit, for based on described luminance errors value, uses non-linearity PID algorithm to calculate increment type PID control
Operator processed；
Second computing unit, is used for importing described incremental timestamp operator, is calculated the value driving PWM；
Control unit, for carrying out auto iris control according to the value of described driving PWM to described video camera.
In embodiments of the present invention, calculate according to the luminance errors value of the current real-time pictures of CCTV camera and be currently needed for
Driving PWM, to realize the auto iris of photographic head is controlled, run into the situation of ambient brightness acute variation at CCTV camera
Under can automatically control aperture folding, to reach suitable exposure effect, and whole regulation process fast and stable, improve security protection
The video frequency output effect of monitoring.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment or description of the prior art
The accompanying drawing used required in is briefly described, it should be apparent that, the accompanying drawing in describing below is only some of the present invention
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these
Accompanying drawing obtains other accompanying drawing.
Fig. 1 is the control of diaphragm principle schematic of protection and monitor field camera lens；
Fig. 2 is the schematic diagram of the control of diaphragm flow process of the protection and monitor field camera lens that the embodiment of the present invention provides；
Fig. 3 be the embodiment of the present invention provide the auto iris control method for protection and monitor field realize flow process
Figure；
Fig. 4 is the concrete real of the auto iris control method S302 for protection and monitor field of embodiment of the present invention offer
Existing flow chart；
Fig. 5 is the concrete real of the auto iris control method S403 for protection and monitor field of embodiment of the present invention offer
Existing flow chart；
Fig. 6 is the structured flowchart that the auto iris for protection and monitor field that the embodiment of the present invention provides controls device.
Detailed description of the invention
In below describing, in order to illustrate rather than in order to limit, it is proposed that the such as tool of particular system structure, technology etc
Body details, in order to thoroughly understand the embodiment of the present invention.But, it will be clear to one skilled in the art that and do not having these concrete
The other embodiments of details can also realize the present invention.In other situation, omit well-known system, device, electricity
Road and the detailed description of method, in order to avoid unnecessary details hinders description of the invention.
In order to preferably illustrate the embodiment of the present invention, the first the control of diaphragm principle to protection and monitor field camera lens
It is described:
As it is shown in figure 1, input direct-current motor driving chip include reference pulse width modulated (Pulse Width
Modulation, PWM) and drive PWM, wherein, benchmark PWM is pre-set by hardware circuit, and its value size is by hardware electricity
The concrete structure on road determines；Master control chip monochrome information based on front lens input picture statistical result, according to inside certainly
Dynamic the control of diaphragm algorithm calculates and drives PWM and export to DC motor Driver chip, and DC motor Driver chip is converted to drive
Galvanic electricity is put down, and is used for controlling rotation direction and the speed of motor, thus reaches to control the purpose of the aperture folding of camera lens.Such as Fig. 2
Shown in, when carrying out the control of diaphragm, first determine whether current the control of diaphragm pattern and exposure mode, to determine whether to start accordingly
Auto iris control functional module, it is achieved auto iris control.
Fig. 3 shows the realization stream of the auto iris control method for protection and monitor field that the embodiment of the present invention provides
Journey, technical scheme therein is mainly used in realizing controlling camera lens auto iris, and details are as follows:
In S301, obtaining current luminance errors value, described luminance errors value is the real-time picture that video camera currently obtains
The average brightness value in face and the difference of default target brightness value.
Wherein, the average brightness value of the real-time pictures that video camera currently obtains, refer to that video camera currently gets current
The meansigma methods of pixel intensity in picture frame, and preset target brightness value usually monitoring system arrange disclosure satisfy that user couple
One brightness value of picture brightness demand.
As one embodiment of the present of invention, after getting luminance errors value, before performing S302, described method is also
Including:
Described luminance errors value is carried out pretreatment, including by described luminance errors value divided by a setting factor beforehand.
Owing to luminance errors value just can be, it is also possible to be negative, therefore, luminance errors value is positive and negative the most corresponding different
Setting factor beforehand, the size of setting factor beforehand can be adjusted according to practical situation, and its effect determines that the minimal adjustment model of brightness
Enclosing, the stability to help aperture size regulates.
In S302, based on described luminance errors value, non-linearity PID algorithm is used to calculate incremental timestamp operator.
In embodiments of the present invention, incremental timestamp operator is determined by luminance errors value, specifically, such as Fig. 4 institute
Show:
In S401, calculate p_data, i_data and d_data, wherein:
P_data=p_coef*luma_data [0]/p_div, luma_data [0] is current described luminance errors value,
P_div is preset constant, and p_coef is the monotonically increasing function of the non-negative about described luminance errors value；
I_data=i_data+i_coef*luma_data [0], luma_data [0] and i_coef are inverse ratio；
D_data=Δ error=luma_data [0]-luma_data [1], luma_data [1] are last input
Described luminance errors value.
For the value that p_data, p_coef are a size real-time change along with luminance errors value, p_coef is
The function of luminance errors value luma_data [0], meets p_coef=F (luma_data [0]), wherein F (luma_data [0])
Can be linear function, it is also possible to be nonlinear function, but it must be ensured that the monotonic increase that it is luma_data [0] non-negative
Function, so makes calling program more simplify, and only can complete the determination of p_data with two statements, and the size of p_data is tight
Lattice change rapidly according to the variation tendency of luma_data [0], and the speed of adjustment and smoothness have also been obtained and significantly improve, p_div
For preset constant, can be adjusted according to different automatic diaphragm lens.
For i_data, according to the effect of integration control in PID control principle, the control of i_data is done at ladder segmentation
Reason, institute sublevel number n from Row sum-equal matrix, concretism can be according to reality: luminance errors value is the least, takes advantage of factor i_ in i_data
Coef is the biggest.Its implementation is, is divided into positive and negative both direction, each direction to be divided into n grade luma_data [0], each
The step-length of grade can be arranged voluntarily, and corresponding factor i_coef of taking advantage of is corresponding setting, wherein n according to side circuit debugging result
And each i_coef is the constant more than 0.
For d_data, its value is luminance errors increment, and the most current luminance errors value is with the last brightness inputted by mistake
The difference of difference, here, the luminance errors value that can ensure to be currently entered by arranging intermediate variable does not cover last input
Luminance errors value, the setting of intermediate variable can be realized by following statement:
Luma_data [0]=luma_data；
Luma_data [1]=luma_data [0].
In S402, p_data, i_data and d_data are imported Δ duty=Δ u=A*p_data+B*i_data+C*
d_data。
In S403, determined the value of A, B, C by debugging, to obtain described incremental timestamp operator Δ duty.
As one embodiment of the present of invention, the value of A, B, C can be debugged by the way of shown in Fig. 5 and be obtained:
In S501, B and C it is set to 0 and regulates A value, treating that the aperture of described video camera reaches the first pre-determined stability shape
During state, determine current A value.
In S502, C is set to 0, regulates B value, when the aperture of described video camera reaches the second pre-determined stability state,
Determine current B value.
In S503, regulate C value, when the aperture of described video camera reaches the 3rd pre-determined stability state, determine current C
Value.
In the present embodiment, the first pre-determined stability state, the second pre-determined stability state, the 3rd pre-determined stability state are the most right
The degree of stability of the control of diaphragm answered sequentially raises, and such as, first, B and C is set to 0, and individually regulation A value, treats video camera
Aperture can quickly be adjusted to proper states, and when occurring vibrating less, determines current A value；Secondly, C is set to 0,
Regulation B value, until the aperture of video camera is adjusted to aperture when almost no longer vibrating, determines current B value；Finally, regulate C value,
Until ensureing that the when that system detecting ambient brightness generation acute variation, aperture can quick and stable be restrained, and determines current C
Value.
In S303, import described incremental timestamp operator, be calculated the value driving PWM.
In embodiments of the present invention, increment type non-linearity PID algorithm imports increment type PIID Control operators, to calculate
Obtain driving the value of PWM.
Further, as one embodiment of the present of invention, traditional increment type PID algorithm can be improved, it may be assumed that
Described incremental timestamp operator is imported u=u (ref) ± Δ duty, using the u value that obtains as described driving
The value of PWM.Wherein, the u (k-1) in traditional increment type PID algorithm being replaced with u (ref), this u (ref) is and current base
The value that quasi-PWM is relevant, is configured according to physical circuit, so, and the value of the driving PWM of final output and last output
The relation driving the value of PWM is just the most directly cut off, the value of the drivings PWM of current output and the hardware circuit of reality and current
Luminance errors value is relevant, so, gets up simpler to the auto iris control realization of video camera, governing speed faster,
Regulating effect is more stable.
In S304, according to the value of described driving PWM, described video camera is carried out auto iris control.
In embodiments of the present invention, calculate according to the luminance errors value of the current real-time pictures of CCTV camera and be currently needed for
Driving PWM, to realize the auto iris of photographic head is controlled, run into the situation of ambient brightness acute variation at CCTV camera
Under can automatically control aperture folding, to reach suitable exposure effect, and whole regulation process fast and stable, improve security protection
The video frequency output effect of monitoring.
Should be understood that in above-described embodiment, the size of the sequence number of each step is not meant to the priority of execution sequence, each process
Execution sequence should determine with its function and internal logic, and the implementation process of the embodiment of the present invention should not constituted any limit
Fixed.
Corresponding to the auto iris control method for protection and monitor field described in foregoing embodiments, Fig. 6 shows this
The auto iris for protection and monitor field that inventive embodiments provides controls the structured flowchart of device, for convenience of description, only
Show part related to the present embodiment.
With reference to Fig. 6, this device includes:
Acquiring unit 61, obtains current luminance errors value, described luminance errors value be video camera currently obtain real-time
The average brightness value of picture and the difference of default target brightness value；
First computing unit 62, based on described luminance errors value, uses non-linearity PID algorithm to calculate incremental timestamp
Operator；
Second computing unit 63, imports described incremental timestamp operator, is calculated the value driving PWM；
Control unit 64, carries out auto iris control according to the value of described driving PWM to described video camera.
Alternatively, described device also includes:
Pretreatment unit, carries out pretreatment to described luminance errors value, including described luminance errors value is pre-divided by one
If the factor.
Alternatively, described first computing unit 62 specifically for:
Calculate p_data, i_data and d_data, wherein:
P_data=p_coef*luma_data [0]/_ div, luma_data [0] are current described luminance errors value,
P_div is preset constant, and p_coef is the monotonically increasing function of the non-negative about described luminance errors value；
I_datd=i_data+i_coef*luma_data [0], luma_data [0] and i_coef are inverse ratio；
D_data=Δ error=luma_data [0]-luma_data [1], luma_data [1] are last input
Described luminance errors value；
P_data, i_data and d_data are imported Δ duty=Δ u=A*p_data+B*i_data+C*d_data；
The value of A, B, C is determined, to obtain described incremental timestamp operator Δ duty by debugging.
Further, described first computing unit 62 specifically for:
B and C it is set to 0 and regulates A value, when the aperture of described video camera reaches the first pre-determined stability state, determining
Current A value.
C is set to 0, regulates B value, when the aperture of described video camera reaches the second pre-determined stability state, determine current
B value；
Regulation C value, when the aperture of described video camera reaches the 3rd pre-determined stability state, determines current C value.
Alternatively, described second computing unit 63 specifically for:
Described incremental timestamp operator is imported u=u (ref) ± Δ duty, using the u value that obtains as described driving
The value of PWM, u (ref) is the value relevant to current benchmark PWM.
Those skilled in the art is it can be understood that arrive, for convenience of description and succinctly, only with above-mentioned each merit
Energy unit, the division of module are illustrated, and in actual application, can distribute above-mentioned functions by different as desired
Functional unit, module complete, and the internal structure of described device will be divided into different functional units or module, above to complete
The all or part of function described.Each functional unit in embodiment, module can be integrated in a processing unit, it is possible to
Being that unit is individually physically present, it is also possible to two or more unit are integrated in a unit, above-mentioned integrated
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.It addition, each function list
Unit, module specific name also only to facilitate mutually distinguish, be not limited to the protection domain of the application.Said system
Middle unit, the specific works process of module, be referred to the corresponding process in preceding method embodiment, do not repeat them here.
Those of ordinary skill in the art are it is to be appreciated that combine the list of each example that the embodiments described herein describes
Unit and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These functions are actually
Perform with hardware or software mode, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel
Each specifically should being used for can be used different methods to realize described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed apparatus and method, can be passed through other
Mode realizes.Such as, system embodiment described above is only schematically, such as, and described module or the division of unit,
Being only a kind of logic function to divide, actual can have other dividing mode when realizing, and the most multiple unit or assembly are permissible
In conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed
Coupling each other or direct-coupling or communication connect can be the INDIRECT COUPLING by some interfaces, device or unit or
Communication connects, and can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, the technical scheme of the embodiment of the present invention
The part that the most in other words prior art contributed or this technical scheme completely or partially can be with software product
Form embody, this computer software product is stored in a storage medium, including some instructions with so that one
Computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform this
All or part of step of method described in each embodiment of bright embodiment.And aforesaid storage medium includes: USB flash disk, portable hard drive,
Read only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic
The various medium that can store program code such as dish or CD.
Embodiment described above only in order to technical scheme to be described, is not intended to limit；Although with reference to aforementioned reality
Execute example the present invention has been described in detail, it will be understood by those within the art that: its still can to aforementioned respectively
Technical scheme described in embodiment is modified, or wherein portion of techniques feature is carried out equivalent；And these amendments
Or replace, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme, all should
Within being included in protection scope of the present invention.
Claims (10)
1. the auto iris control method for protection and monitor field, it is characterised in that including:
Obtaining current luminance errors value, described luminance errors value is the average brightness value of the real-time pictures that video camera currently obtains
Difference with default target brightness value；
Based on described luminance errors value, non-linearity PID algorithm is used to calculate incremental timestamp operator；
Import described incremental timestamp operator, be calculated the value driving PWM；
Value according to described driving PWM carries out auto iris control to described video camera.
2. the method for claim 1, it is characterised in that described based on described luminance errors value, use non-linearity PID
Before algorithm calculates incremental timestamp operator, described method also includes:
Described luminance errors value is carried out pretreatment, including by described luminance errors value divided by a setting factor beforehand.
3. the method for claim 1, it is characterised in that described based on described luminance errors value, uses non-linearity PID to calculate
Method calculates incremental timestamp operator and includes:
Calculate p_data, i_data and d_data, wherein:
P_data=p_coef*luma_data [0]/p_div, luma_data [0] is current described luminance errors value, p_
Div is preset constant, and p_coef is the monotonically increasing function of the non-negative about described luminance errors value；
I_data=i_data+i_coef*luma_data [0], luma_data [0] and i_coef are inverse ratio；
D_data=Δ error=luma_data [0]-luma_data [1], luma_data [1] are the described of last input
Luminance errors value；
P_data, i_data and d_data are imported Δ duty=Δ u=A*p_data+B*i_data+C*d_data；
The value of A, B, C is determined, to obtain described incremental timestamp operator Δ duty by debugging.
4. method as claimed in claim 3, it is characterised in that described determine that the value of A, B, C includes by debugging:
B and C it is set to 0 and regulates A value, when the aperture of described video camera reaches the first pre-determined stability state, determining current
A value.
C is set to 0, regulates B value, when the aperture of described video camera reaches the second pre-determined stability state, determine current B
Value；
Regulation C value, when the aperture of described video camera reaches the 3rd pre-determined stability state, determines current C value.
5. the method for claim 1, it is characterised in that described importing described incremental timestamp operator, is calculated
The value driving PWM includes:
Described incremental timestamp operator is imported u=u (ref) ± Δ duty, using the u value that obtains as described driving PWM's
Value, u (ref) is the value relevant to current benchmark PWM.
6. the auto iris for protection and monitor field controls device, it is characterised in that including:
Acquiring unit, for obtaining current luminance errors value, described luminance errors value is the real-time picture that video camera currently obtains
The average brightness value in face and the difference of default target brightness value；
First computing unit, for based on described luminance errors value, uses non-linearity PID algorithm to calculate incremental timestamp and calculates
Son；
Second computing unit, for importing described incremental timestamp operator in increment type non-linearity PID algorithm, calculates
To the value driving PWM；
Control unit, for carrying out auto iris control according to the value of described driving PWM to described video camera.
7. device as claimed in claim 6, it is characterised in that described device also includes:
Pretreatment unit, for carrying out pretreatment to described luminance errors value, including described luminance errors value is pre-divided by one
If the factor.
8. device as claimed in claim 6, it is characterised in that described first computing unit specifically for:
Calculate p_data, i_data and d_data, wherein:
P_data=p_coef*luma_data [0]/_ div, luma_data [0] are current described luminance errors value, p_div
For preset constant, p_coef is the monotonically increasing function of the non-negative about described luminance errors value；
I_data=i_data+i_coef*luma_data [0], luma_data [0] and i_coef are inverse ratio；D_data=Δ
Error=luma_data [0]-luma_data [1], luma_data [1] are the described luminance errors value of last input；
P_data, i_data and d_data are imported Δ duty=Δ u=A*p_data+B*i_data+C*d_data；
The value of A, B, C is determined, to obtain described incremental timestamp operator Δ duty by debugging.
9. device as claimed in claim 8, it is characterised in that described first computing unit specifically for:
B and C it is set to 0 and regulates A value, when the aperture of described video camera reaches the first pre-determined stability state, determining current
A value.
C is set to 0, regulates B value, when the aperture of described video camera reaches the second pre-determined stability state, determine current B
Value；
Regulation C value, when the aperture of described video camera reaches the 3rd pre-determined stability state, determines current C value.
10. device as claimed in claim 9, it is characterised in that described second computing unit specifically for:
Described incremental timestamp operator is imported u=u (ref) ± Δ duty, using the u value that obtains as described driving PWM's
Value, u (ref) is the value relevant to current benchmark PWM.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108156394A (en) * | 2017-12-29 | 2018-06-12 | 浙江大华技术股份有限公司 | A kind of method and device for adjusting aperture |
| CN109089054A (en) * | 2018-08-10 | 2018-12-25 | 上海安翰医疗技术有限公司 | Automatic exposure control method, storage medium and endoscope |
| CN112789555A (en) * | 2018-10-10 | 2021-05-11 | 索尼公司 | Illumination device and display apparatus |
| CN114302069A (en) * | 2021-11-18 | 2022-04-08 | 北京旷视科技有限公司 | Aperture control method, control device, storage medium, and computer program product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108156394A (en) * | 2017-12-29 | 2018-06-12 | 浙江大华技术股份有限公司 | A kind of method and device for adjusting aperture |
| CN108156394B (en) * | 2017-12-29 | 2020-05-26 | 浙江大华技术股份有限公司 | Method and device for adjusting aperture |
| CN109089054A (en) * | 2018-08-10 | 2018-12-25 | 上海安翰医疗技术有限公司 | Automatic exposure control method, storage medium and endoscope |
| CN109089054B (en) * | 2018-08-10 | 2020-12-15 | 上海安翰医疗技术有限公司 | Automatic exposure control method, storage medium, and endoscope |
| CN112789555A (en) * | 2018-10-10 | 2021-05-11 | 索尼公司 | Illumination device and display apparatus |
| US11435659B2 (en) | 2018-10-10 | 2022-09-06 | Sony Group Corporation | Projection optical systems and methods having variable diaphragm based on average luminance and grayscale |
| CN112789555B (en) * | 2018-10-10 | 2022-10-25 | 索尼公司 | Illumination device and display apparatus |
| CN114302069A (en) * | 2021-11-18 | 2022-04-08 | 北京旷视科技有限公司 | Aperture control method, control device, storage medium, and computer program product |
| CN114302069B (en) * | 2021-11-18 | 2023-09-01 | 北京旷视科技有限公司 | Aperture control method, control device, storage medium, and computer program product |
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