CN105744175A - Screen light fill method and device and mobile terminal - Google Patents
Screen light fill method and device and mobile terminal Download PDFInfo
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- CN105744175A CN105744175A CN201610086357.5A CN201610086357A CN105744175A CN 105744175 A CN105744175 A CN 105744175A CN 201610086357 A CN201610086357 A CN 201610086357A CN 105744175 A CN105744175 A CN 105744175A
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/62—Control of parameters via user interfaces
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- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Studio Devices (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The embodiment of the invention discloses a screen light fill method and device and a mobile terminal. The method comprises following steps of when it is monitored that a screen light fill event is triggered, controlling a camera to capture an image; determining the size of a face image contained in the image; determining a screen brightness according to the size of the face image; and controlling the screen to fill light according to the determined screen brightness. According to the embodiment of the invention, through adoption of the technique scheme, the fill light intensity of the screen can be adjusted intelligently according to the size of the face image; and the existing screen light fill scheme is optimized.
Description
Technical field
The present embodiments relate to shooting technology field, particularly relate to a kind of screen light compensation method, device and mobile terminal.
Background technology
At present, photographic head has become as the standard configuration of big multi-mobile-terminal, along with the continuous lifting of photographic head performance, the camera function in mobile terminal also from strength to strength, for liking the user taken pictures to bring facility.
Many mobile phone users are all liked using the front-facing camera on mobile terminal to autodyne, but the front-facing camera of existing mobile terminal is all without being equipped with light compensating lamp, the environment that night or light are poor is autodyned, can be difficult to obtain, because of under-exposed, effect of desirably autodyning.
In order to obtain suitable exposure when user autodynes, existing a kind of scheme is to coordinate front-facing camera to carry out light filling to take pictures by lighting screen (control display screen and show suitable brightness).But, there are the following problems for the program: when utilizing screen to carry out light filling, usual screen intensity is fixing or determines screen intensity according to the environmental light brightness detected, but when autodyning, the degree of crook of user's arm or whether use the situation of self-shooting bar all can affect the distance between screen and user face, if and screen is relatively near with user face, then be likely to occur overexposure phenomenon；If screen is with user face farther out, then it is likely to occur light filling not foot phenomenon.So, the light filling effect of existing screen light filling scheme is unsatisfactory, it is impossible to meet user's request.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of screen light compensation method, device and mobile terminal, to optimize existing screen light filling scheme.
First aspect, embodiments provides a kind of screen light compensation method, including:
Monitor screen light filling event when being triggered, control photographic head and catch image；
Determine the size of the facial image comprised in described image；
Size according to described facial image determines screen intensity；
Control screen and carry out light filling with determined screen intensity.
Second aspect, embodiments provides a kind of screen light compensating apparatus, including:
Picture catching controls module, for when monitoring screen light filling event and being triggered, controlling photographic head and catch image；
Size determines module, for determining the size of the facial image comprised in described image；
Screen intensity determines module, determines screen intensity for the size according to described facial image；
Light filling controls module, is used for controlling screen and carries out light filling with determined screen intensity.
The third aspect, embodiments provides a kind of mobile terminal, and described mobile terminal is integrated with the screen light compensating apparatus in the embodiment of the present invention.
The screen light filling scheme provided in the embodiment of the present invention, when monitoring screen light filling event and being triggered, control photographic head and catch image, it is determined that the size of facial image in image, and the size according to facial image determines screen intensity, finally control screen and carry out light filling with determined screen intensity.By adopting technique scheme, the light filling brightness according to the size adjustment screen of facial image, thus optimizing existing screen light filling scheme.
Accompanying drawing explanation
The schematic flow sheet of a kind of screen light compensation method that Fig. 1 provides for the embodiment of the present invention one；
The schematic flow sheet of a kind of screen light compensation method that Fig. 2 provides for the embodiment of the present invention two；
The schematic flow sheet of a kind of preferred screen light compensation method that Fig. 3 provides for the embodiment of the present invention three；
The structured flowchart of a kind of screen light compensating apparatus that Fig. 4 provides for the embodiment of the present invention four.
Detailed description of the invention
Technical scheme is further illustrated below in conjunction with accompanying drawing and by detailed description of the invention.It is understood that specific embodiment described herein is used only for explaining the present invention, but not limitation of the invention.It also should be noted that, for the ease of describing, accompanying drawing illustrate only part related to the present invention but not entire infrastructure.
It should be mentioned that, some exemplary embodiments are described as the process as flow chart description or method before being discussed in greater detail exemplary embodiment.Although each step is described as the process of order by flow chart, but many steps therein can be implemented concurrently, concomitantly or simultaneously.Additionally, the order of each step can be rearranged.Described process can be terminated when its operations are completed, it is also possible to have the additional step being not included in accompanying drawing.Described process can correspond to method, function, code, subroutine, subprogram etc..
Embodiment one
The schematic flow sheet of a kind of screen light compensation method that Fig. 1 provides for the embodiment of the present invention one, the method can be performed by screen light compensating apparatus, and wherein this device can be realized by software and/or hardware, generally can integrated in the terminal.As it is shown in figure 1, the method includes:
Step 101, monitor screen light filling event when being triggered, control photographic head and catch image.
Exemplary, mobile terminal concretely mobile phone in the present embodiment, panel computer and digital camera etc. are configured with the terminal unit of display screen.
Exemplary, monitor screen light filling event and be triggered and specifically can refer to that monitoring user actively triggers screen light filling event by modes such as buttons, it is possible to refer to that monitoring mobile terminal triggers screen light filling event automatically.Such as, when the photographic head in mobile terminal (is concretely fixed on the front-facing camera in mobile terminal front, namely with the front-facing camera of screen homonymy；It is alternatively current location and is in the rotatable camera in mobile terminal front) it is in opening, and screen light filling function is when being under opening, after detecting that user presses key of taking pictures, light-metering is carried out by devices such as ambient light sensors, when photometry result comprising current environmental light brightness lower than predetermined luminance threshold value, automatically trigger screen light filling event.It should be noted that, also can detect that photographic head is in opening, and when screen light filling function is under opening, directly start light-metering, when photometry result comprising current environment light luminance lower than predetermined luminance threshold value, automatically trigger screen light filling and take pictures event.
Step 102, determine the size of the facial image comprised in image.
Exemplary, the size of the facial image comprised in image can be determined by face recognition technology, concrete face recognition process can refer to existing face recognition technology, and the present embodiment is not especially limited.
Step 103, size according to facial image determine screen intensity.
Exemplary, the size of facial image is more big, illustrates that user face distance screen is more near, can screen intensity be set to lower；And the size of facial image is more little, illustrates that user face distance screen is more remote, screen intensity can be set to higher.Visible, in order to obtain better light filling effect, the size of facial image and screen intensity can be inverse relation.
Step 104, control screen carry out light filling with determined screen intensity.
Exemplary, if user has pressed key of taking pictures before screen light filling event is triggered, this step now can be performed after execution of step 103 immediately；If user does not also press key of taking pictures before screen light filling event is triggered, when monitoring shoot button and being triggered, this step can be performed.
Exemplary, the image that screen shows the particular color (such as pure white) of a full screen can be controlled, and show this image with determined screen intensity.
The screen light compensation method that the embodiment of the present invention one provides, when monitoring screen light filling event and being triggered, control photographic head and catch image, it is determined that the size of facial image in image, and the size according to facial image determines screen intensity, finally control screen and carry out light filling with determined screen intensity.By adopting technique scheme, the light filling brightness according to the size adjustment screen of facial image, thus optimizing existing screen light filling scheme.
On the basis of above-described embodiment, may also include that in the process controlling screen and carrying out with determined screen intensity light filling, control photographic head shooting photo.Described photographic head is concretely fixed on the front-facing camera in mobile terminal front, namely with the front-facing camera of screen homonymy；It is alternatively current location and is in the rotatable camera in mobile terminal front.Carry out in the process of light filling at screen with suitable brightness, the light that screen sends can be irradiated to the object in screen front, object (especially user face) is made to obtain suitable light filling, now control photographic head shooting photo, can obtain exposing rational high-quality photos, meet user's request, promote Consumer's Experience.
Embodiment two
The schematic flow sheet of a kind of screen light compensation method that Fig. 2 provides for the embodiment of the present invention two, the present embodiment is optimized based on above-described embodiment, in the present embodiment, step " determining screen intensity according to the size of facial image " is optimized for: determine luminance factor according to the size of facial image, determine screen intensity according to the product of luminance factor and benchmark screen intensity.
Accordingly, the method for the present embodiment comprises the steps:
Step 201, monitor screen light filling event when being triggered, control photographic head and catch image.
Step 202, determine the size of the facial image comprised in image.
Step 203, size according to facial image determine luminance factor.
Exemplary, the area of facial image can be calculated respectively and the area of image that photographic head catches, and calculate the ratio of above-mentioned two area, determine luminance factor according to this ratio；Also can calculate the ratio of the width of facial image and the width of image, determine luminance factor according to this ratio.
Such as, the width of facial image being designated as face_width, the width of the image caught by photographic head is designated as frame_width, and ratio is ratio, according to equation below ratio calculated:
Ratio=face_width/frame_width
Determine that according to ratio r atio the specific rules of luminance factor may is that
If ratio < 0.5, then the distant of user face and screen is described, luminance factor A is defined as 1；
If ratio > 0.8, then the close together of user face and screen is described, luminance factor A is defined as 0.6；
If 0.5 < ratio < 0.8, then would illustrate that user face is moderate with the distance of photographic head, linear interpolation can be carried out between 1 and 0.6, obtain luminance factor A.For example, it is assumed that ratio=B, then B can be calculated according to formula (1-A)/(1-0.6)=(B-0.5)/(0.8-0.5).Such as B=0.7, substitute into this formula, A=11/15 can be obtained.
Above 0.5,0.8,1 and 0.6 is only used as and schematically illustrates, and can be adjusted when practical application.Further, ratio also can be divided into according to practical situation more interval, carry out corresponding different luminance factor, to strengthen the precision determining screen intensity.
Step 204, product according to luminance factor and benchmark screen intensity determine screen intensity.
Exemplary, benchmark screen intensity can be the highest display brightness of screen, so arranges and is advantageous in that benchmark screen intensity is fixed value, can accelerate to determine the speed of screen intensity, screen fast response time, can promote Consumer's Experience.Benchmark screen intensity can also be the display brightness determined according to environmental light brightness, so arranges and is advantageous in that, can to determine suitable screen intensity more accurately according to the difference of current shooting environment, improve light filling effect further.Such as, light-metering can be carried out by devices such as ambient light sensors, photometry result comprises current environmental light brightness, determine benchmark screen intensity according to this environmental light brightness.When environmental light brightness is relatively low, can benchmark screen intensity be determined higher；When environmental light brightness is higher, can benchmark screen intensity be determined lower.
Step 205, control screen carry out light filling with determined screen intensity.
The screen light compensation method that the embodiment of the present invention two provides, size according to facial image determines luminance factor, and the product further according to luminance factor and benchmark screen intensity determines screen intensity, can improve the accuracy determining screen intensity, improve light filling effect further, promote photographic quality.
Embodiment three
The schematic flow sheet of a kind of preferred screen light compensation method that Fig. 3 provides for the embodiment of the present invention three, the method comprises the steps:
Step 301, detect that photographic head has turned on, and when screen light filling function is in opening, controls ambient light sensor and obtain environmental light brightness in real time.
Step 302, judge that whether current environmental light brightness is lower than predetermined luminance threshold value, if so, then perform step 303；Otherwise, step 308 is performed.
If current environmental light brightness is lower than predetermined luminance threshold value, illustrate that current shooting environment is dark, it is necessary to utilize screen to carry out light filling.Predetermined luminance threshold value can be arranged by system default or be shot custom by user according to individual and be configured.
Step 303, determine benchmark screen intensity according to current environmental light brightness.
Step 304, control photographic head catch image, and determine the size of the facial image comprised in image.
Step 305, calculate the ratio of the width of width and the image of facial image, determine luminance factor according to ratio.
Step 306, product according to luminance factor and benchmark screen intensity determine screen intensity.
Step 307, when monitoring key of taking pictures and being triggered, control screen and carry out light filling with determined screen intensity, and control photographic head and take pictures, process ends.
Exemplary, when user press on mobile terminal take pictures key time, key of taking pictures can be monitored and be triggered.
It should be noted that, owing to environmental light brightness is probably real-time change, the size of facial image is also likely to be real-time change, so determined screen intensity is also likely to be real-time change, when monitoring key of taking pictures and being triggered, the screen intensity that control screen is determined with current time carries out light filling.
Step 308, when monitoring key of taking pictures and being triggered, control photographic head take pictures, process ends.
If current environmental light brightness is not less than predetermined luminance threshold value, illustrate that current shooting environment is brighter, it is not necessary to carry out screen light filling, so when monitoring key of taking pictures and being triggered, can directly controlling photographic head and take pictures.
The screen light compensation method that the embodiment of the present invention three provides, determines the light filling brightness of screen in real time, can further improve the accuracy determining screen intensity according to the size of facial image and environmental light brightness, improves light filling effect, promotes photographic quality.
Embodiment four
The structured flowchart of a kind of screen light compensating apparatus that Fig. 4 provides for the embodiment of the present invention four, this device can be realized by software and/or hardware, is typically integrated in mobile terminal, can carry out screen light filling by execution screen light compensation method.As shown in Figure 4, this device includes picture catching control module 401, size determines that module 402, screen intensity determine that module 403 and light filling control module 404.
Wherein, picture catching controls module 401, for when monitoring screen light filling event and being triggered, controlling photographic head and catch image；Size determines module 402, for determining the size of the facial image comprised in described image；Screen intensity determines module 403, determines screen intensity for the size according to described facial image；Light filling controls module 404, is used for controlling screen and carries out light filling with determined screen intensity.
The embodiment of the present invention four provide screen light compensating apparatus, can according to the light filling brightness of the size adjustment screen of facial image, thus optimizing existing screen light filling scheme.
On the basis of above-described embodiment, described screen intensity determines that module can include luminance factor and determine that unit and screen intensity determine unit.Wherein, luminance factor determines unit, determines luminance factor for the size according to described facial image；Screen intensity determines unit, determines screen intensity for the product according to described luminance factor and benchmark screen intensity.
On the basis of above-described embodiment, described luminance factor determines that unit can include ratio calculation subelement and luminance factor determines subelement.Wherein, ratio calculation subelement, it is used for the ratio of the width calculating described facial image and the width of described image；Luminance factor determines subelement, for determining luminance factor according to described ratio.
On the basis of above-described embodiment, described benchmark screen intensity can for the highest display brightness of described screen or the display brightness determined according to environmental light brightness.
On the basis of above-described embodiment, this device may also include that control module of taking pictures, for, in the process controlling screen and carrying out with determined screen intensity light filling, controlling photographic head shooting photo.
On the basis of above-described embodiment, described photographic head can be the rotatable camera that front-facing camera or current location are in mobile terminal front.
Embodiment five
The present embodiment five provides a kind of mobile terminal, and this mobile terminal is integrated with the screen light compensating apparatus in the embodiment of the present invention, can realize screen light filling by execution screen light compensation method.
Exemplary, mobile terminal concretely mobile phone in the present embodiment, panel computer and digital camera etc. are configured with the terminal unit of display screen.
When user uses the mobile terminal in the present embodiment to autodyne, it is currently needed for, by screen, auto heterodyne is carried out light filling if mobile terminal monitors, photographic head will be controlled and catch image, size according to the facial image comprised in image determines screen intensity, then controls screen and carry out light filling with determined screen intensity.Mobile terminal can be taken pictures in light filling process, optimizes existing screen light filling scheme.
The screen light compensating apparatus and the mobile terminal that there is provided in above-described embodiment can perform the screen light compensation method that any embodiment of the present invention provides, and possess the execution corresponding functional module of the method and beneficial effect.The not ins and outs of detailed description in the above-described embodiments, the screen light compensation method that can provide referring to any embodiment of the present invention.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention being described in further detail by above example, but the present invention is not limited only to above example, when without departing from present inventive concept, other Equivalent embodiments more can also be included, and the scope of the present invention is determined by appended right.
Claims (13)
1. a screen light compensation method, it is characterised in that including:
Monitor screen light filling event when being triggered, control photographic head and catch image；
Determine the size of the facial image comprised in described image；
Size according to described facial image determines screen intensity；
Control screen and carry out light filling with determined screen intensity.
2. method according to claim 1, it is characterised in that the described size according to described facial image determines screen intensity, including:
Size according to described facial image determines luminance factor；
Product according to described luminance factor and benchmark screen intensity determines screen intensity.
3. method according to claim 2, it is characterised in that the described size according to described facial image determines luminance factor, including:
Calculate the ratio of the width of described facial image and the width of described image；
Luminance factor is determined according to described ratio.
4. method according to claim 2, it is characterised in that described benchmark screen intensity is the highest display brightness of described screen or the display brightness determined according to environmental light brightness.
5. the method according to any one of claim 1-4, it is characterised in that also include: in the process controlling screen and carrying out with determined screen intensity light filling, control described photographic head shooting photo.
6. the method according to any one of claim 1-4, it is characterised in that described photographic head is the rotatable camera that front-facing camera or current location are in mobile terminal front.
7. a screen light compensating apparatus, it is characterised in that including:
Picture catching controls module, for when monitoring screen light filling event and being triggered, controlling photographic head and catch image；
Size determines module, for determining the size of the facial image comprised in described image；
Screen intensity determines module, determines screen intensity for the size according to described facial image；
Light filling controls module, is used for controlling screen and carries out light filling with determined screen intensity.
8. device according to claim 7, it is characterised in that described screen intensity determines that module includes:
Luminance factor determines unit, determines luminance factor for the size according to described facial image；
Screen intensity determines unit, determines screen intensity for the product according to described luminance factor and benchmark screen intensity.
9. device according to claim 8, it is characterised in that described luminance factor determines that unit includes:
Ratio calculation subelement, is used for the ratio of the width calculating described facial image and the width of described image；
Luminance factor determines subelement, for determining luminance factor according to described ratio.
10. device according to claim 8, it is characterised in that described benchmark screen intensity is the highest display brightness of described screen or the display brightness determined according to environmental light brightness.
11. according to the device described in any one of claim 7-10, it is characterised in that also include:
Take pictures control module, for, in the process controlling screen and carrying out with determined screen intensity light filling, controlling described photographic head shooting photo.
12. according to the device described in any one of claim 7-10, it is characterised in that described photographic head is the rotatable camera that front-facing camera or current location are in mobile terminal front.
13. a mobile terminal, it is characterised in that described mobile terminal is integrated with the screen light compensating apparatus as described in any one of claim 7-12.
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| CN108495056A (en) * | 2018-06-12 | 2018-09-04 | 努比亚技术有限公司 | Photographic method, mobile terminal and computer readable storage medium |
| CN109379539A (en) * | 2018-11-23 | 2019-02-22 | 维沃移动通信有限公司 | A kind of screen light compensation method and terminal |
| CN111368670A (en) * | 2020-02-26 | 2020-07-03 | 上海依图信息技术有限公司 | Face recognition method and device, readable medium and system thereof |
| CN114915705A (en) * | 2021-02-09 | 2022-08-16 | 英业达科技有限公司 | Light supplement method and computer system thereof |
| TWI796633B (en) * | 2021-02-19 | 2023-03-21 | 英業達股份有限公司 | Method of light compensating and computer system thereof |
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