CN108668022A - A kind of face unlocking method under dark-state and its mobile terminal - Google Patents
A kind of face unlocking method under dark-state and its mobile terminal Download PDFInfo
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- CN108668022A CN108668022A CN201810384013.1A CN201810384013A CN108668022A CN 108668022 A CN108668022 A CN 108668022A CN 201810384013 A CN201810384013 A CN 201810384013A CN 108668022 A CN108668022 A CN 108668022A
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- face
- unlock
- human face
- face data
- state
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/667—Preventing unauthorised calls from a telephone set
- H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72463—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions to restrict the functionality of the device
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Security & Cryptography (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Environmental & Geological Engineering (AREA)
- Telephone Function (AREA)
- Lock And Its Accessories (AREA)
- Image Input (AREA)
Abstract
The invention discloses the face unlocking method and its mobile terminal under a kind of dark-state, the face unlocking method includes：A, it when the unlock of detection face starts, obtains ambient brightness and simultaneously judges whether current if so then execute step B be not to acquire the laggard pedestrian's face of human face data to unlock in dark-state according to ambient brightness；B, the backlight illumination of screen is adjusted to after maximum value and acquires human face data, face unlock is carried out according to human face data.Ambient brightness is increased by the way of screen light filling, by most bright backlight illumination face, the light source that face obtains is just more, and the face to capture will be apparent, you can improve unlock success rate.
Description
Technical field
The present invention relates to electronic technology field, more particularly to the face unlocking method under a kind of dark-state and its mobile terminal.
Background technology
Face ID are a kind of brush face authentication modes for substituting Touch ID and releasing.By taking mobile phone as an example, only adopted in unlock
Collect human face data, can't take pictures；Collected human face data is compared by the human face data of typing in preset algorithm and mobile phone,
Unanimously then mobile phone successfully unlocks two human face datas.It is typically that human face data is acquired to realize face by Front camera at present
Unlocking function, but environment is than dark in the dark state, acquisition human face data is relatively fuzzyyer, causes unlock success rate relatively low, influences
User unlocks effect.
Thus the prior art could be improved and improve.
Invention content
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide the face unlock sides under a kind of dark-state
Method and its mobile terminal, to solve the problems, such as existing mobile terminal, face unlock success rate is relatively low in the dark state.
In order to achieve the above object, this invention takes following technical schemes：
A kind of face unlocking method under dark-state comprising：
Step A, it when the unlock of detection face starts, obtains ambient brightness and whether is in dark-state according to ambient brightness judgement is current,
If so then execute step B, it is not to acquire the laggard pedestrian's face unlock of human face data；
Step B, human face data is acquired after the backlight illumination of screen being adjusted to maximum value, face solution is carried out according to human face data
Lock.
In face unlocking method under the dark-state, the step A includes：
Step A1, it detects and starts face unlock when power button is pressed under screen lock state；
Step A2, detection is presently in the light luminance of environment and is converted to corresponding brightness value, whether judges the brightness value
Less than or equal to threshold value：It is to then follow the steps B, otherwise carries out face unlock.
It is described that face solution is carried out according to human face data in the step B in face unlocking method under the dark-state
The step of lock includes：
Step B1, the human face data of acquisition and the human face data of pre-recording of advance typing are compared, the human face data of acquisition with
Human face data of pre-recording is identical, unlocks；
Step B2, the backlight illumination of screen is restored into initial value after detection unlocks successfully.
In face unlocking method under the dark-state, after the step B, further include：
Step C, when detection unlock failure, human face data is acquired after opening flash lamp, face unlock is carried out according to human face data.
In face unlocking method under the dark-state, the step C includes：
Step C1, it when detection unlock failure, obtains the current electricity of battery and judges whether electricity is less than electricity lower limiting value：If
Then follow the steps C2；Otherwise human face data is acquired after opening flash lamp, face unlock is carried out according to human face data；
Step C2, reduce camera frame per second to pre-value after, acquisition human face data go forward side by side pedestrian's face unlock.
In face unlocking method under the dark-state, after the step C1, further include：It detects after unlocking successfully certainly
It is dynamic to close flash lamp.
In face unlocking method under the dark-state, after the step C2, further include：Detecting will after successfully unlocking
The frame per second of camera restores initial value.
It is a kind of realize described in dark-state under face unlocking method mobile terminal comprising camera, light sensor and
Processor；
The light sensor obtains ambient brightness, is currently according to ambient brightness judgement when processor detection face unlock starts
It is no be in dark-state, in dark-state the backlight illumination of screen is then adjusted to maximum value after by camera acquire human face data, processing
Device carries out face unlock according to human face data；When being not at dark-state, processor controls camera and acquires the laggard pedestrian's face of human face data
Unlock.
Further include flash lamp in the mobile terminal：
When processor detection unlock failure, control camera acquires human face data after opening flash lamp, according to human face data into
Pedestrian's face unlocks.
Compared to the prior art, the face unlocking method and its mobile terminal under dark-state provided by the invention, face unlock
When method includes step A, detection face unlock startup, it is simultaneously current whether in secretly according to ambient brightness judgement to obtain ambient brightness
State is not to acquire the laggard pedestrian's face unlock of human face data if so then execute step B；Step B, by the backlight illumination tune of screen
Human face data is acquired after section to maximum value, face unlock is carried out according to human face data.Ring is increased by the way of screen light filling
Border brightness, by most bright backlight illumination face, the light source that face obtains is just more, and the face to capture will be apparent,
Unlock success rate can be improved.
Description of the drawings
Fig. 1 is the flow chart of one embodiment of face unlocking method under dark-state provided by the invention.
Fig. 2 is the flow chart of another embodiment of face unlocking method under dark-state provided by the invention.
Fig. 3 is the structure diagram of the mobile terminal of the face unlock under dark-state provided by the invention.
Specific implementation mode
The present invention provides face unlocking method and its mobile terminal under a kind of dark-state, is suitable for various having Face ID
The mobile terminal of function.To make the purpose of the present invention, technical solution and effect clearer, clear and definite, it develops simultaneously referring to the drawings
The present invention is described in more detail for embodiment.It should be appreciated that described herein, specific examples are only used to explain the present invention,
It is not intended to limit the present invention.
Referring to Fig. 1, the face unlocking method under the dark-state of an embodiment provided by the invention includes：
When S100, detection face unlock start, obtains ambient brightness and whether be in dark-state according to ambient brightness judgement is current, if
It is to then follow the steps S200, is not to acquire the laggard pedestrian's face unlock of human face data；
S200, human face data is acquired after the backlight illumination of screen is adjusted to maximum value, face unlock is carried out according to human face data.
The present embodiment is by taking mobile terminal is mobile phone as an example.Then the step S100 is specifically included：
Start face unlock when power button is pressed under step 110, detection screen lock state.
User is by pressing solving locking key（Usually multiplexing power button is as solving locking key）It is unlocked to start face, needs to open light
Function is felt to judge the brightness of ambient light, so as under certain dark-state（I.e. residing environment is dark can make human face data fuzzy）It cuts
Change to light filling state.
Step 120, detection are presently in the light luminance of environment and are converted to corresponding brightness value, judge the brightness value
Whether threshold value is less than or equal to：It is to then follow the steps S200, otherwise carries out face unlock.
This step detects light luminance by light sensor and is converted to corresponding brightness value, and processor is from light sensing
Brightness value is read in the chip of device and judges whether to be less than or equal to threshold value（Such as 100）.Less than then indicating what mobile phone was presently in
Environment is dark, i.e., needs to carry out light filling in dark-state.Preposition cameras capture can be made to clearly more than then current ambient brightness
Face.
In the present embodiment, the face unlock acquires human face data and is compared with human face data of pre-recording, if face
Data are identical as human face data of pre-recording, and unlock, and unlock is prompted to fail if differing.
When the present embodiment carries out FACE ID unlocks, increase ambient brightness by the way of screen light filling, in order to face
The capture of image.In the step S200, the backlight illumination of screen is adjusted to maximum value, is to adjust backlight circuit PWM
Duty ratio is to 100%, and the backlight illumination of mobile phone is maximum at this time.So in the dark state, pass through most bright backlight illumination face, face
Obtained light source is with regard to more, the CAM of mobile phone（Camera）The face captured will be apparent, you can improves unlock success rate.It will adopt
The human face data of collection is compared with the human face data of pre-recording being logged in advance in mobile phone, identical, is unlocked.Detection unlocks successfully
Brightness before the backlight illumination of screen is reduced to afterwards.
In the specific implementation, if environment is very dark, even if screen light filling can not reach brightness demand, it is clear to collect
Human face data.Ambient brightness can also be increased by flash lighting.Also referring to Fig. 2, then in the step S200
Later, further include：
When S300, detection unlock failure, human face data is acquired after opening flash lamp, face unlock is carried out according to human face data.
Existing mobile phone is both provided with preposition flash lamp substantially, screen light filling unlock failure when, can also when dark-state unlocks,
By opening flash lamp, preposition camera is allowed to be easier to capture face, acquires human face data, then with advance typing in mobile phone
The human face data for human face data of pre-recording is compared, and the two is identical, is unlocked.Flash lamp is automatically closed after unlocking successfully in detection.
The brightness of ordinary flash lamp is very strong, meets the ambient brightness requirement of FACE ID unlocks enough.If but the relatively low nothing of electricity
Method opens flash lamp, then proactive frame per second improves the ambient brightness under dark-state when can also be unlocked by reducing.The then step
S300 is specifically included：
When step 310, detection unlock failure, obtains the current electricity of battery and judge whether electricity is less than electricity lower limiting value：If
It is to then follow the steps 320；Otherwise human face data is acquired after opening flash lamp, face unlock is carried out according to human face data.
Step 320, reduce camera frame per second to pre-value after, acquisition human face data go forward side by side pedestrian's face unlock.
Frame per second proactive when unlock is reduced, that is, reduces the transmission quantity of picture per second, to increase the time for exposure of camera, with
Just human face data is preferably acquired.By the human face data of the human face data of pre-recording of advance typing in the human face data of acquisition and mobile phone
It is compared, and then identifies unlock.It detects the frame per second after successfully unlocking by camera and restores initial value.
It is to be appreciated that three kinds of modes for improving human face data acquisition clarity are elaborated in above-described embodiment, when
The backlight illumination of screen is adjusted to maximum value, second is that flash lamp is opened, third, reducing the frame per second of camera to pre-value.Specific real
Shi Shi, these three modes also can side by side be executed such as above-mentioned carry out Overlapped Execution.For example, step S200 only opens flash lamp
Or the frame per second of camera is reduced to pre-value；Also execution can be interacted, adjusting backlight luminance or drop can be used when such as opening flash lamp failure
The frame per second of low camera is to pre-value, if can also open, elder generation's adjusting backlight luminance when flash lamp fails, fail reduces the frame per second of camera again
To pre-value.The arbitrary combination of these three modes is not construed as limiting herein.
Based on the face unlocking method under above-mentioned dark-state, the embodiment of the present invention also provides the face unlock under a kind of dark-state
The mobile terminal of method please refers to Fig. 3, the mobile terminal includes camera 10, light sensor 20 and processor 30；The light
Line inductor 20 obtains ambient brightness, and whether processor 30 detects when face unlock starts and be currently according to ambient brightness judgement
Dark-state, in dark-state the backlight illumination of screen is then adjusted to maximum value after by camera acquire human face data, processor 30
Face unlock is carried out according to human face data；When being not at dark-state, processor controls the laggard pedestrian's face unlock of camera acquisition human face data.
In further embodiment, the mobile terminal further includes flash lamp 40, when the detection unlock of the processor 30 fails,
Control camera 10 acquires human face data after opening flash lamp 40, and face unlock is carried out according to human face data.
In conclusion the present invention is increased by the way of the backlight illumination of screen to be adjusted to maximum value, opens flash lamp
Add ambient brightness, the light source that face obtains is made to increase, consequently facilitating capturing clearly human face data, you can raising unlocks successfully
Rate.Increase the time for exposure of camera by the way of the frame per second to pre-value for reducing camera, preferably to acquire human face data.
To solve the problems, such as existing mobile terminal, face unlock success rate is relatively low in the dark state.
The division of above-mentioned function module, can be as needed by above-mentioned function only to for example, in practical applications
Distribution is completed by different function modules, that is, different function modules is divided into, to complete all or part of foregoing description
Function.
One of ordinary skill in the art will appreciate that all or part of flow in above-described embodiment method, is that can pass through
Computer（The ends PC）Program instructs the relevant hardware to complete, the computer（The ends PC）Program can be stored in a computer
（The ends PC）In read/write memory medium, program is when being executed, it may include the flow of the embodiment of above-mentioned each method.Storage therein
Medium can be magnetic disc, CD etc..
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect range.
Claims (9)
1. the face unlocking method under a kind of dark-state, which is characterized in that including：
Step A, it when the unlock of detection face starts, obtains ambient brightness and whether is in dark-state according to ambient brightness judgement is current,
If so then execute step B, it is not to acquire the laggard pedestrian's face unlock of human face data；
Step B, human face data is acquired after the backlight illumination of screen being adjusted to maximum value, face solution is carried out according to human face data
Lock.
2. the face unlocking method under dark-state according to claim 1, which is characterized in that the step A includes：
Step A1, it detects and starts face unlock when power button is pressed under screen lock state；
Step A2, detection is presently in the light luminance of environment and is converted to corresponding brightness value, whether judges the brightness value
Less than or equal to threshold value：It is to then follow the steps B, otherwise carries out face unlock.
3. the face unlocking method under dark-state according to claim 1, which is characterized in that in the step B, described
Include according to the step of human face data progress face unlock：
Step B1, the human face data of acquisition and the human face data of pre-recording of advance typing are compared, the human face data of acquisition with
Human face data of pre-recording is identical, unlocks；
Step B2, the backlight illumination of screen is restored into initial value after detection unlocks successfully.
4. the face unlocking method under dark-state according to claim 1 or 3, which is characterized in that after the step B,
Further include：
Step C, when detection unlock failure, human face data is acquired after opening flash lamp, face unlock is carried out according to human face data.
5. the face unlocking method under dark-state according to claim 4, which is characterized in that the step C includes：
Step C1, it when detection unlock failure, obtains the current electricity of battery and judges whether electricity is less than electricity lower limiting value：If
Then follow the steps C2；Otherwise human face data is acquired after opening flash lamp, face unlock is carried out according to human face data；
Step C2, reduce camera frame per second to pre-value after, acquisition human face data go forward side by side pedestrian's face unlock.
6. the face unlocking method under dark-state according to claim 5, which is characterized in that after the step C1, also
Including：Flash lamp is automatically closed after unlocking successfully in detection.
7. the face unlocking method under dark-state according to claim 5, which is characterized in that after the step C2, also
Including：It detects the frame per second after successfully unlocking by camera and restores initial value.
8. a kind of mobile terminal for realizing the face unlocking method under dark-state described in claim 1, which is characterized in that including phase
Machine, light sensor and processor；
The light sensor obtains ambient brightness, is currently according to ambient brightness judgement when processor detection face unlock starts
It is no be in dark-state, in dark-state the backlight illumination of screen is then adjusted to maximum value after by camera acquire human face data, processing
Device carries out face unlock according to human face data；When being not at dark-state, processor controls camera and acquires the laggard pedestrian's face of human face data
Unlock.
9. mobile terminal according to claim 8, which is characterized in that further include flash lamp：
When processor detection unlock failure, control camera acquires human face data after opening flash lamp, according to human face data into
Pedestrian's face unlocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810384013.1A CN108668022B (en) | 2018-04-26 | 2018-04-26 | Face unlocking method in dark state and mobile terminal thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384013.1A CN108668022B (en) | 2018-04-26 | 2018-04-26 | Face unlocking method in dark state and mobile terminal thereof |
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| CN108668022A true CN108668022A (en) | 2018-10-16 |
| CN108668022B CN108668022B (en) | 2020-11-27 |
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| CN111511002A (en) * | 2020-04-23 | 2020-08-07 | Oppo广东移动通信有限公司 | Method and device for adjusting detection frame rate, terminal and readable storage medium |
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| Publication number | Publication date |
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| CN108668022B (en) | 2020-11-27 |
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