CN108965730A - A kind of brightness adjusting method and device - Google Patents
A kind of brightness adjusting method and device Download PDFInfo
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- CN108965730A CN108965730A CN201810934587.1A CN201810934587A CN108965730A CN 108965730 A CN108965730 A CN 108965730A CN 201810934587 A CN201810934587 A CN 201810934587A CN 108965730 A CN108965730 A CN 108965730A
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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
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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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
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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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
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
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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
- H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals
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Abstract
This application discloses a kind of brightness adjusting method and devices, this method comprises: obtaining the first image, the first image is the image that the user's eye and/or face that are included are shot using image-taking system；Obtain the luminance parameter of predeterminable area in the first image；If the luminance parameter of predeterminable area is except predetermined luminance range in the first image, the parameter of image-taking system is then adjusted, so that the luminance parameter of the predeterminable area in the second image captured by the image-taking system after adjusting using parameter is within predetermined luminance range；Wherein, predeterminable area includes: the region where user's eye, and/or, the region where user face.It can be seen that, the application can make the brightness of ocular and/or face area in the second image using the image-taking system shooting after parameter adjustment sufficiently high, so determining that the position of eyeball is just relatively more accurate according to the second image, and then it is also possible that the determination of blinkpunkt position is also relatively more accurate.
Description
Technical field
This application involves field of image processings, more particularly to a kind of method and device of brightness regulation.
Background technique
Distant reading type eyeball tracking technology, which refers to, obtains the technology of user's blinkpunkt by analyzing user's eye motion.Mainstream skill
Art relies primarily on the eye image based on infrared frequency range, analyzes human eye feature information, and then obtain user's blinkpunkt.
Currently, can determine blinkpunkt by the characteristics of image of user eyeball in analysis image.But at present to figure
What what image brightness was adjusted considered in time is the overall brightness of image, i.e., according to the brightness of shooting environmental come to the whole of image
Body brightness is adjusted, but this mode is unable to ensure that human eye area brightness of image is suitable, leads to the feature to human eye area
Extract inaccurate, and then blinkpunkt determined by causing is not accurate enough.
Summary of the invention
The application provides a kind of brightness adjusting method and device, to improve the accuracy of eyeball position identification and watch point attentively
Set determining accuracy.
In a first aspect, the embodiment of the present application provides a kind of brightness adjusting method, comprising:
Obtain the first image, the first image be shot using image-taking system include user's eye and/
Or the image of face；
Obtain the luminance parameter of predeterminable area in the first image；
If the luminance parameter of predeterminable area is except predetermined luminance range in the first image, adjusts described image and obtain
The parameter of system is taken, so that the predeterminable area in the second image captured by the image-taking system after being adjusted using parameter
Luminance parameter is within the predetermined luminance range；
Wherein, predeterminable area includes: the region where user's eye, and/or, the area where the user face
Domain.
Optionally, the parameter of described image acquisition system includes:
The parameter of image acquisition equipment in described image acquisition system, and/or, illumination control in described image acquisition system
The parameter of control equipment.
Optionally, the parameter that described image obtains equipment includes following any one or more:
Time for exposure, gain and gamma.
Optionally, the parameter of the light control equipment includes:
The brightness of light source.
Optionally, the method also includes:
The working time of the light source is determined according to the time for exposure that described image obtains sensor in equipment.Optionally,
The adjusting described image obtains the parameter of system, so that second captured by the image-taking system after being adjusted using parameter
The luminance parameter of predeterminable area in image is within the predetermined luminance range, comprising:
According to the difference of the luminance parameter of the predeterminable area and the endpoint of the predetermined luminance range, determines and adjust step
It is long；
The parameter that described image obtains system is adjusted according to the adjusting step-length, so that the image after adjusting using parameter
The luminance parameter of predeterminable area in second image captured by acquisition system is within the predetermined luminance range.
Optionally, the luminance parameter of the predeterminable area is determined according to the grayscale distribution information of the predeterminable area；
The grayscale distribution information includes following any one or more:
The average gray value of the predeterminable area, the gray scale intermediate value of the predeterminable area, total gray scale of the predeterminable area
The gray-scale watermark of value and the predeterminable area.
Second aspect, the embodiment of the present application provide a kind of brightness regulating apparatus, comprising:
First acquisition unit, for obtaining the first image, the first image is to shoot to obtain using image-taking system
User's eye and/or face image；
Second acquisition unit, for obtaining the luminance parameter of predeterminable area in the first image；
Adjust unit, if the luminance parameter for predeterminable area in the first image except predetermined luminance range,
The parameter that described image obtains system is adjusted, so that the second image captured by the image-taking system after adjusting using parameter
In predeterminable area luminance parameter within the predetermined luminance range；
Wherein, predeterminable area includes: the region where user's eye, and/or, the area where the user face
Domain.
Optionally, the parameter of described image acquisition system includes:
The parameter of image acquisition equipment in described image acquisition system, and/or, illumination control in described image acquisition system
The parameter of control equipment.
Optionally, the parameter that described image obtains equipment includes following any one or more:
Time for exposure, gain and gamma.
Optionally, the parameter of the light control equipment includes:
The brightness of light source.
Optionally, described device further include:
Light source control unit, the time for exposure for obtaining sensor in equipment according to described image determine the light source
Working time.
Optionally, the adjusting unit, is specifically used for:
According to the difference of the luminance parameter of the predeterminable area and the endpoint of the predetermined luminance range, determines and adjust step
It is long；
The parameter that described image obtains system is adjusted according to the adjusting step-length, so that the image after adjusting using parameter
The luminance parameter of predeterminable area in second image captured by acquisition system is within the predetermined luminance range.
Optionally, the luminance parameter of the predeterminable area is determined according to the grayscale distribution information of the predeterminable area；
The grayscale distribution information includes following any one or more:
The average gray value of the predeterminable area, the gray scale intermediate value of the predeterminable area, total gray scale of the predeterminable area
The gray distribution features of value and the predeterminable area.
Compared with prior art, the embodiment of the present application has the advantage that
Brightness adjusting method and device provided by the embodiments of the present application, this method comprises: the first image is obtained, described first
Image is the image of the user's eye and/or face that are shot using image-taking system；It obtains pre- in the first image
If regional luminance parameter；If the luminance parameter of predeterminable area is except predetermined luminance range in the first image, institute is adjusted
The parameter of image-taking system is stated, so that pre- in the second image captured by the image-taking system after adjusting using parameter
If the luminance parameter in region is within the predetermined luminance range；Wherein, predeterminable area includes: the area where user's eye
Domain, and/or, the region where the user face.It can be seen that using brightness adjusting method provided by the embodiments of the present application and
Device, according to the luminance parameter of ocular and/or face area in the first image, to adjust the parameter of image-taking system,
So that ocular and/or face area in the second image that the image-taking system after being adjusted using parameter is shot is bright
Parameter is spent within the predetermined luminance range.Because the brightness of ocular and/or face area in the second image is enough
Height, so determine that the position of eyeball is just relatively more accurate according to the second image, and then it is also possible that blinkpunkt position determination
It is accurate to compare.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram of a brightness adjusting method provided by the embodiments of the present application；
Fig. 2 is a kind of process signal of the method for parameter for adjusting described image acquisition system provided by the embodiments of the present application
Figure；
Fig. 3 is a kind of structural schematic diagram of brightness regulating apparatus provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
Present inventor has found after study, currently, some image acquiring devices can be according to the bright of shooting environmental
Degree, automatically adjusts the parameter of itself, to change the brightness of image entirety.But the automatic brightness adjustment based on shooting environmental
The parameter of image acquiring device can only make the overall brightness of image captured by the image acquiring device after adjusting using parameter
Meet corresponding condition, when image overall brightness is higher, the brightness of the image of user's eye and surrounding instead may be poor, i.e.,
The brightness of user's ocular or user's face area in image captured by image acquiring device after being adjusted using parameter
It may can not meet the requirements, also can not just be accurately obtained the position of eyeball and the position of blinkpunkt.
To solve the above-mentioned problems, the embodiment of the present application provides a kind of brightness adjusting method and device, specifically: obtaining the
One image, the first image are that is shot using image-taking system includes the image of user's eye and/or face；It obtains
Take predeterminable area luminance parameter in the first image；If the luminance parameter of predeterminable area is in predetermined luminance in the first image
Except range, then the parameter that described image obtains system is adjusted, so that the image-taking system after being adjusted using parameter is clapped
The luminance parameter for the predeterminable area in the second image taken the photograph is within the predetermined luminance range；Wherein, predeterminable area includes: institute
The region where user's eye is stated, and/or, the region where the user face.
It can be seen that using brightness adjusting method provided by the embodiments of the present application and device, by the first image of analysis
The luminance parameter of predeterminable area adjusts the parameter of image-taking system, rather than the automatic brightness adjustment figure based on shooting environmental
Parameter as obtaining equipment, so that the predeterminable area in the second image that the image-taking system after being adjusted using parameter is shot
Luminance parameter within the predetermined luminance range, region as where the predeterminable area includes: user's eye,
And/or the region where the user face, so that the brightness of the eye of user is met the requirements in second image.
With reference to the accompanying drawing, the various non-limiting embodiments of the application are described in detail.
Illustrative methods
Referring to Fig. 1, which is a kind of flow diagram of brightness adjusting method provided by the embodiments of the present application.In this implementation
In example, the method can for example be realized by following steps S101-S103.
S101: the first image is obtained；The first image is to be shot using image-taking system including user's eye
The image in portion and/or face.
It should be noted that the image-taking system referred in the embodiment of the present application, such as may include that image acquisition is set
Standby and light control equipment.
Wherein, for the image acquisition equipment in described image acquisition system for shooting image, described image obtains equipment can
Think camera, video camera etc..The light control equipment can be used for controlling the brightness of light source, to provide for shooting environmental
Certain brightness conditions.
It should be noted that as it was noted above, distant reading type eyeball tracking technology refer to by analyze user's eye motion obtain
To the technology of user's blinkpunkt.On the one hand, when the brightness of the image of the eye of user is met the requirements, then eye can accurately be extracted
Feature accurately estimates the position of blinkpunkt in turn.On the other hand, when the brightness of the image of the face of user is met the requirements, can also recognize
Brightness for the image of the eye of corresponding user is also met the requirements.In addition, some algorithm can be in conjunction with facial feature information, example
Face location and direction such as are calculated with key point, auxiliary calculates blinkpunkt.
In consideration of it, the first image referred in the embodiment of the present application, can be that described image obtains system photographs includes
User's eye and/or the image of face.
S102: predeterminable area luminance parameter in the first image is obtained.
It should be noted that in the embodiment of the present application, after getting the first image, can use image processing algorithm
The first image is analyzed and processed, so that it is determined that the predeterminable area in the first image out.It specifically, can be to the first figure
As carrying out signature analysis, the predeterminable area is determined according to the characteristics of image of the first image.
After obtaining the predeterminable area, the luminance parameter of the predeterminable area can be obtained.
It should be noted that the embodiment of the present application does not limit the predeterminable area luminance parameter specifically.As an example,
The luminance parameter of the predeterminable area can be determined according to the grayscale distribution information of the predeterminable area.Wherein, the gray scale point
Cloth information includes total ash of the average gray value of the predeterminable area, the gray scale intermediate value of the predeterminable area, the predeterminable area
Any one or multinomial in the gray-scale watermark of angle value and the predeterminable area.
It should be noted that the average gray value of the predeterminable area refers to, the ash for the pixel that the predeterminable area includes
The quotient of the sum of all pixels of the summation of angle value and the predeterminable area.The gray scale intermediate value of the predeterminable area, refers to, the preset areas
The median of the gray value for the pixel that domain includes.Total gray value of the predeterminable area, refers to, the predeterminable area includes
The summation of the gray value of pixel.The gray-scale watermark of the predeterminable area refers to the predeterminable area in different gray areas
Between pixel grey scale distribution character.
S103: if the luminance parameter of predeterminable area is except predetermined luminance range in the first image, described in adjusting
The parameter of image-taking system, so that default in the second image captured by image-taking system after being adjusted using parameter
The luminance parameter in region is within the predetermined luminance range.
It should be noted that the predeterminable area includes: the region where user's eye, and/or, user's face
Region where portion.As it was noted above, it may include image acquisition equipment and light control equipment that described image, which obtains system,.Cause
This, in a kind of possible implementation of the embodiment of the present application, the parameter that described image obtains system for example may include: institute
The parameter of the image acquisition equipment in image-taking system is stated, and/or, the ginseng of light control equipment in described image acquisition system
Number.
Wherein, the parameter of image acquisition equipment may include time for exposure, gain and gamma in described image acquisition system
In it is any one or more.The parameter of the light control equipment may include: the brightness of light source.
Wherein, the time for exposure refers to, described image obtains the time for exposure of each frame image captured by equipment；Institute
Optical signal will be received and be converted into after voltage signal by stating the sensor that gain refers to that described image obtains in equipment, to the voltage
The amplitude that signal amplifies；The gamma refers to, when the sensor of image acquisition equipment converts optical signals into voltage signal,
Mapping relations between optical signal and voltage signal.
It can be seen that passing through preset areas in the first image of analysis using brightness adjusting method provided by the embodiments of the present application
The luminance parameter in domain adjusts the parameter of image-taking system, rather than the automatic brightness adjustment image based on shooting environmental obtains
The parameter of equipment, so that the brightness of the predeterminable area in the second image that the image-taking system after being adjusted using parameter is shot
Parameter is within the predetermined luminance range, region as where the predeterminable area includes: user's eye, and/or,
Region where the user face, so that the brightness of the eye of user is met the requirements in second image.
It should be noted that in practical applications, due to the bat of the luminance factor and image-taking system of shooting environmental
The factors such as parameter is unreasonable are taken the photograph, may can not be extracted from the image that image-taking system is shot comprising user's eye
And/or the image of user face.Therefore, in a kind of possible implementation of the embodiment of the present application, before step S101,
Can the parameter to image-taking system tentatively adjusted so that using in the image-taking system after the preliminary adjusting
It include the image of user's eye and/or user face in first image of image acquisition equipment shooting.
In a kind of possible implementation of the embodiment of the present application, step S102 in specific implementation, can be by such as
Lower step S201-S202 is realized.
S201: it according to the difference of the luminance parameter of the predeterminable area and the endpoint of the predetermined luminance range, determines and adjusts
Save step-length.
It is understood that the difference of the endpoint of the luminance parameter of the predeterminable area and the predetermined luminance range, it can
To characterize the luminance parameter of the predeterminable area far from the degree of the predetermined luminance range, it can characterize the bright of predeterminable area
Gap between degree and desired level.
It should be noted that the adjusting step-length referred in the embodiment of the present application, refers to, described image obtains the parameter of system
Regulated value.
It should be noted that in one possible implementation, the difference can be pre-saved and the adjusting walks
Corresponding relationship between length adjusts step-length to determine according to the corresponding relationship.
It should be noted that in alternatively possible implementation, it may be predetermined that the difference and the adjusting
Functional relation between step-length adjusts step-length to determine according to the functional relation.Described in the embodiment of the present application does not limit specifically
Functional relation, as an example, the difference and the functional relation adjusted between step-length can be with are as follows: linear relationship refers to
Any one or more in number relationships, Gauss Map relationship and second-order linearity relationship.
S202: the parameter that described image obtains system is adjusted according to the adjusting step-length, so that after adjusting using parameter
Image-taking system captured by predeterminable area in the second image luminance parameter within the predetermined luminance range.
As it was noted above, the parameter that described image obtains system includes image acquisition equipment in described image acquisition system
Parameter, and/or, the parameter of light control equipment in described image acquisition system.The embodiment of the present application is not limited specifically and is adjusted
Design parameter.For example, in adjustable image-taking system light control equipment parameter, do not adjust in image-taking system
The parameter of image acquisition equipment.For another example, in adjustable image-taking system image acquisition equipment parameter, do not adjust image and obtain
Take the parameter of light control equipment in system.For another example, the parameter of image acquisition equipment in image-taking system can also be both adjusted,
The parameter of light control equipment in image-taking system is adjusted again.
In view of if the brightness of light source is relatively low in described image acquisition system, will lead to the figure in practical application
As in acquisition system image acquisition equipment shoot image it is of low quality.If the brightness of light source is compared in image-taking system
Height then will use family eye and be stimulated, in addition, the brightness of light source also will receive the limit of hardware in described image acquisition system
System.Therefore, it is however generally that, the light-source brightness in image-taking system can be adjusted to a suitable numerical value, i.e., by illumination control
The parameter regulation of control equipment is to a suitable numerical value.It therefore, can in a kind of possible implementation of the embodiment of the present application
First to adjust the parameter of image acquisition equipment in image-taking system, if utilizing the image after image acquisition equipment parameter regulation
The quality for obtaining the image of system photographs cannot be met the requirements, and readaptability adjusts light control equipment in image-taking system
Parameter.
It should be noted that when adjusting the parameter of image acquisition equipment in described image acquisition system, due to described image
The parameter of acquisition equipment includes any one or more in time for exposure, gain and gamma.The embodiment of the present application does not limit specifically
Fixed design parameter adjusted, when the parameter of image acquisition equipment adjusted includes multinomial, the embodiment of the present application does not also have
Body limits the adjusting sequence of the parameter of the multinomial image acquisition equipment.
In one possible implementation, the exposure of image acquisition equipment in described image acquisition system can first be adjusted
Time, if utilizing the luminance parameter of predeterminable area in image captured by the image-taking system after time for exposure adjustment
Within the predetermined luminance range, then the gain of image acquisition equipment and gamma in described image acquisition system are no longer adjusted.
If the time for exposure that described image adjusted obtains equipment reaches the maximum exposure time of the image acquisition equipment, institute is utilized
State the luminance parameter of predeterminable area in image captured by the image-taking system after time for exposure adjustment it is described preset it is bright
It spends except range, then adjusts the gain of image acquisition equipment in described image acquisition system.
If utilizing the luminance parameter of predeterminable area in image captured by the image-taking system after the gain adjustment
Within the predetermined luminance range, then the gamma of image acquisition equipment in described image acquisition system is no longer adjusted.If adjustment
When the gain that described image afterwards obtains equipment reaches the maximum gain of the image acquisition equipment, after the gain adjustment
Image-taking system captured by image predeterminable area luminance parameter except the predetermined luminance range, then adjust institute
State the gamma of image acquisition equipment in image-taking system.
It should be noted that if utilizing the image of the image-taking system shooting after image acquisition equipment parameter regulation
Quality cannot be met the requirements, and readaptability adjusts the parameter of light control equipment in image-taking system.It should be noted that adjusting
The parameter of light control equipment in image-taking system is saved, such as adjusts the brightness of radiant in specific implementation, such as can be with
By adjusting light source voltage, electric current or duty ratio are realized.
It should be noted that in general, image acquisition equipment work during, light control equipment such as light source
It is constantly in working condition, i.e. light source can continuous illumination.But during image acquisition equipment works, in image acquisition equipment
Sensor be not necessarily in exposure status.For example, it is 20Hz that the image of image acquisition equipment, which obtains frequency, that each frame figure
The acquisition time of picture is 50ms.But the sensor in image acquisition equipment is not necessarily in exposure status in this 50ms,
That is the time for exposure of image acquisition equipment is not necessarily 50ms, it is possible to which only 10ms, i.e. image acquisition equipment only exist
It allows sensor to receive illumination in 10ms duration and luminance signal is transformed into electric signal.
And when the sensor is not at exposure status, if light source does not shine, image acquisition equipment bat will not be influenced
The quality for the image taken the photograph.It, can be in order to energy saving in consideration of it, in a kind of possible implementation of the embodiment of the present application
The working time of the light source is determined according to the time for exposure that described image obtains sensor in equipment.It can be obtained in image
When exposure sensor in equipment, the light source working is allowed.
In the embodiment of the present application, when exposure sensor in image acquisition equipment, allow the light source working specific
It, can be there are many implementation, for example, image acquisition equipment can notify control when sensor is in exposure status when realization
Device processed perhaps started to work by controller or PC control light source by host computer.It for another example, can be to the hard of image acquisition equipment
The hardware of part and light source improves, and when the sensor of image acquisition equipment is in exposure status, is directly obtained by image
The corresponding control information is passed to light source by equipment, to control light source start-up operation.
Example devices
Referring to Fig. 3, which is a kind of structural schematic diagram of brightness regulating apparatus provided by the embodiments of the present application.
Brightness regulating apparatus 300 provided by the embodiments of the present application, such as can specifically include: acquiring unit 310, second are obtained
It takes unit 320 and adjusts unit 330.
First acquisition unit 310, for obtaining the first image, the first image is to be shot using image-taking system
What is arrived includes the image of user's eye and/or face；
Second acquisition unit 320, for obtaining the luminance parameter of predeterminable area in the first image；
Adjust unit 330, if the luminance parameter for predeterminable area in the first image except predetermined luminance range,
The parameter that described image obtains system is then adjusted, so that the second figure captured by the image-taking system after adjusting using parameter
The luminance parameter of predeterminable area as in is within the predetermined luminance range；
Wherein, predeterminable area includes: the region where user's eye, and/or, the area where the user face
Domain.
Optionally, the parameter of described image acquisition system includes:
The parameter of image acquisition equipment in described image acquisition system, and/or, illumination control in described image acquisition system
The parameter of control equipment.
Optionally, the parameter of image acquisition equipment includes following any one or more:
Time for exposure, gain and gamma.
Optionally, the parameter of light control equipment includes:
The brightness of light source.
Optionally, described device further include:
Light source control unit, the time for exposure for obtaining sensor in equipment according to described image determine the light source
Working time.
Optionally, the adjusting unit 330, is specifically used for:
According to the difference of the luminance parameter of the predeterminable area and the endpoint of the predetermined luminance range, determines and adjust step
It is long；
The parameter that described image obtains system is adjusted according to the adjusting step-length, so that the image after adjusting using parameter
The luminance parameter of predeterminable area in second image captured by acquisition system is within the predetermined luminance range.
It should be noted that the adjusting unit 330 is in specific implementation, the image-taking system that needs can be adjusted
Parameter and/or adjust step-length by hardware interface notification image obtain system.Wherein, hardware interface refers to that image-taking system mentions
It supplies external equipment or controls the input interface of program.External equipment or control program format according to defined by interface to
The parameter and/or adjusting step-length for the image-taking system that image-taking system transmitting needs to adjust.
Optionally, the luminance parameter of the predeterminable area is determined according to the grayscale distribution information of the predeterminable area；
The grayscale distribution information includes following any one or more:
The average gray value of the predeterminable area, the gray scale intermediate value of the predeterminable area, total gray scale of the predeterminable area
The gray distribution features of value and the predeterminable area.
Specifically describing for each unit about described device 300 can be with reference to the description section of above method embodiment, this
Place repeats no more.
It can be seen that passing through preset areas in the first image of analysis using brightness regulating apparatus provided by the embodiments of the present application
The luminance parameter in domain adjusts the parameter of image-taking system, rather than the automatic brightness adjustment image based on shooting environmental obtains
The parameter of equipment, so that the brightness of the predeterminable area in the second image that the image-taking system after being adjusted using parameter is shot
Parameter is within the predetermined luminance range, region as where the predeterminable area includes: user's eye, and/or,
Region where the user face, so that the brightness of the eye of user is met the requirements in second image.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the application
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims
The foregoing is merely the preferred embodiments of the application, not to limit the application, it is all in spirit herein and
Within principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.
Claims (10)
1. a kind of brightness adjusting method characterized by comprising
The first image is obtained, the first image is to be shot using image-taking system including user's eye and/or face
The image in portion；
Obtain the luminance parameter of predeterminable area in the first image；
If the luminance parameter of predeterminable area is except predetermined luminance range in the first image, adjusts described image and obtain system
The parameter of system, so that the brightness of the predeterminable area in the second image captured by image-taking system after being adjusted using parameter
Parameter is within the predetermined luminance range；
Wherein, predeterminable area includes: the region where user's eye, and/or, the region where the user face.
2. the method according to claim 1, wherein the parameter that described image obtains system includes:
The parameter of image acquisition equipment in described image acquisition system, and/or, light control is set in described image acquisition system
Standby parameter.
3. according to the method described in claim 2, it is characterized in that, the parameter that described image obtains equipment includes following any one
Item is multinomial:
Time for exposure, gain and gamma.
4. according to the method described in claim 2, it is characterized in that, the parameter of the light control equipment includes:
The brightness of light source.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
The working time of the light source is determined according to the time for exposure that described image obtains sensor in equipment.
6. the method according to claim 1, wherein it is described adjust described image obtain system parameter so that
The luminance parameter of predeterminable area in second image captured by image-taking system after being adjusted using parameter is described pre-
If within brightness range, comprising:
According to the difference of the luminance parameter of the predeterminable area and the endpoint of the predetermined luminance range, determines and adjust step-length；
The parameter that described image obtains system is adjusted according to the adjusting step-length, so that the image after being adjusted using parameter is obtained
The luminance parameter of predeterminable area in second image captured by system is within the predetermined luminance range.
7. method described in -6 any one according to claim 1, which is characterized in that the luminance parameter of the predeterminable area according to
The grayscale distribution information of the predeterminable area determines；
The grayscale distribution information includes following any one or more:
The average gray value of the predeterminable area, the gray scale intermediate value of the predeterminable area, total sum of the grayscale values of the predeterminable area
The gray-scale watermark of the predeterminable area.
8. a kind of brightness regulating apparatus characterized by comprising
First acquisition unit, for obtaining the first image, the first image is the packet shot using image-taking system
Include the image of user's eye and/or face；
Second acquisition unit, for obtaining the luminance parameter of predeterminable area in the first image；
Unit is adjusted, if the luminance parameter for predeterminable area in the first image is adjusted except predetermined luminance range
Described image obtains the parameter of system, so that in the second image captured by the image-taking system after being adjusted using parameter
The luminance parameter of predeterminable area is within the predetermined luminance range；
Wherein, predeterminable area includes: the region where user's eye, and/or, the region where the user face.
9. device according to claim 8, which is characterized in that described image obtain system parameter include:
The parameter of image acquisition equipment in described image acquisition system, and/or, light control is set in described image acquisition system
Standby parameter.
10. device according to claim 8, which is characterized in that the adjusting unit is specifically used for:
According to the difference of the luminance parameter of the predeterminable area and the endpoint of the predetermined luminance range, determines and adjust step-length；
The parameter that described image obtains system is adjusted according to the adjusting step-length, so that the image after being adjusted using parameter is obtained
The luminance parameter of predeterminable area in second image captured by system is within the predetermined luminance range.
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| CN201810934587.1A CN108965730A (en) | 2018-08-16 | 2018-08-16 | A kind of brightness adjusting method and device |
| PCT/CN2019/086370 WO2020034673A1 (en) | 2018-08-16 | 2019-05-10 | Brightness adjustment method and device |
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| CN201810934587.1A CN108965730A (en) | 2018-08-16 | 2018-08-16 | A kind of brightness adjusting method and device |
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| CN111479357A (en) * | 2020-04-28 | 2020-07-31 | 安徽艳阳电气集团有限公司 | Control method and device for L ED project lamp |
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| CN113808045B (en) * | 2021-09-18 | 2024-06-25 | 凌云光技术股份有限公司 | Image brightness adjusting method and device |
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