CN107066089A - A kind of mobile phone eye posture guard method based on computer vision technique - Google Patents
A kind of mobile phone eye posture guard method based on computer vision technique Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/168—Feature extraction; Face representation
- G06V40/171—Local features and components; Facial parts ; Occluding parts, e.g. glasses; Geometrical relationships
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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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
- H04M1/725—Cordless telephones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
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Abstract
A kind of mobile phone eye posture guard method based on computer vision technique.There are 4,500,000,000 cellphone subscribers, improper use mobile phone in the whole world（Hypotelorism or too far, overlong time, posture it is not right）Except myopia development can be caused, presbyopia can be also caused.The present invention uses computer vision technique, and by mobile phone front camera, identification cellphone subscriber is automatically reminded to using the distance, posture, time of mobile phone.
Description
Technical field
The technical field that this specification is related to is sight protectio, Mobile solution, software application, computer vision, face knowledge
Not.
Background technology
Poor sight has a strong impact on the information obtaining ability of people, so as to reduce the quality of the life of people.Asked when eyesight occurs in people
After topic, not only can not clearly read books, blackboard and screen, perplex to learning tape, and can not clearly recognize week
The human and environment enclosed, obstacle is brought to social activity.When meeting with extreme environment, such as war, earthquake, fire, traffic accident, if
Glasses, which are damaged, can not understand identification surrounding environment, and poor sight person effectively can not save oneself and help others, and substantially reduce people living ability.
According to statistics, there are 4,500,000,000 cellphone subscribers, the people of A nearsighted person 1,200,000,000, every year in vision health in the whole world in 2016
The medical expenses of aspect are 25,000,000,000 dollars.
It is a lifelong process to protect eyesight.In China, A nearsighted person is about 400,000,000 people.In younger population, in 80%
Myopia of student, 90% university student myopia.More than 40 years old presbyopia patients（It is commonly called as：" presbyopia "）About 3.7 hundred million people.For teenager
Colony, main purpose is pre- myopia prevention.For adult population, main purpose is prevention presbyopia.
Unhealthy use mobile phone is the first cause for causing poor sight.Wherein, with eye hypotelorism, use eye overlong time
Damage to eyesight is especially serious.According to the suggestion of ophthalmologist, oculist, health should keep human eye just to screen, distance using mobile phone
Screen should be 25cm, excessively near all bad too far, and loosens ciliary muscle at a distance being looked into the distance with eye after 40 minutes.
Mobile phone sight protectio scheme in the market has following manner：
1st, by controlling mobile phone screen colour temperature and luminous intensity, user's ocular comfort is made, such as：360 EyeGuards etc..
2nd, between the control of monitoring user behavior is used at the moment.Such as application for a patent for invention：Smart mobile phone eyesight protection system（Application
Number：201410573236.4）Start timer by lighting screen in the scheme, be then automatically reminded to.
3rd, monitoring eye distance from.（1）By increase external infrared distance measuring device measurement eye distance from.Such as：Bubukao collects
The small gifted child tablet personal computer or utility model of group's production：A kind of mobile phone and computer myopia prevention induction alarm device（Application number：
201520300407.6）.（2）Use computer vision technique.For example, application for a patent for invention：Smart machine sight protectio method
With system（Application number 201410298382.0）.The technology uses camera gathered data, the peace of the distance of computational intelligence equipment
Quan Xing, according to the dispaly state that smart machine is adjusted apart from safety results.
However, at present mobile phone eye distance from e measurement technology on also have very big room for improvement.
For infrored equipment scheme, have the following disadvantages：
1st, main flow mobile phone（Such as：Huawei, millet, apple, three magnitudes）Without infrared distance measuring equipment, technology is caused to be difficult to make extensively
With.
Whether be people, easily produce wrong report by the interference of other objects if object being measured the 2nd, can not be judged.
3rd, posture when user uses mobile phone can not accurately be judged.It can not judge to whether there is level when user uses mobile phone
Direction side face sees the mobile phone, the adverse condition such as vertical direction pitching sees the mobile phone.
4th, extra hardware cost is increased.
It is also immature with eye distance technique by camera measurement mobile phone at present, with regard to application for a patent for invention：Smart machine is regarded
Try hard to keep maintaining method and system（Application number 201410298382.0）For, do not possess the exploitativeness of engineering, there is following improvement
Space：
1st, do not possess operability on Consumer's Experience.
In order to measure mobile phone and user distance, the technical requirements target is captured, with this in the minimum distance of permission
It is determined that the minimum distance allowed when in use.However, for common cellphone user, user is not aware that the minimum distance of permission is
How much, also accurately it can not captured and autodyned to set a distance.So as to cause the technology not being conveniently applied to
Users.
2nd, there is problem in the operation form of program.
The final purpose of mobile phone sight protectio service is can be effective when user is applied using colourful mobile phone
Protect eyesight.Therefore, the program of mobile phone sight protectio should in the form of background service, rather than independent utility mode, with
The parallel operation of other mobile phones application.
3rd, the posture not to cellphone subscriber is identified.
The use mobile phone of health also requires user just to screen in addition to distance.By computer vision technique, we
Mobile phone can not only be measured to the distance of user, and change that can also be by calculating facial characteristics distance calculates user and used
The posture of mobile phone.
The content of the invention
In order to help cellphone subscriber's eye health, my company develops the precious mobile phone application product of a entitled eye, its android
Version download address is shown in Fig. 5 Quick Response Codes.The present invention disclose in detail the key technology employed in this precious product of eye.
The present invention carries out image procossing using camera to the key point of face, so as to judge that user uses the distance of mobile phone
And direction.Because the shape of face and physical trait of each user are different, for accurate measurement distance and posture, it is necessary to each user
Calibrated when using this service on new cell-phone for the first time.Calibration is needed in given physical distance, in the mobile phone camera
Pixel coordinate system in, record the distance between face feature point sets up proportionate relationship.Follow-up in the cellphone subscriber was used
Cheng Zhong, according to the change of distance between face feature point, proportionally method, calculate physics between user and mobile phone screen away from
From, and user use mobile phone posture.
Specifically calibration method is.
（1）User's both hands just hold mobile phone, and mobile phone is lifted and arrives front, and both hands are reached farthest, and straight, binocular is found towards hand in head
Machine, just autodynes to front camera.
（2）By face characteristic recognizer, the user is recorded in specific physical distance, face feature point（Eyes, eyebrow
The heart, nose, face）Coordinate and calibration relative distance in the pixel coordinate system of camera.
（3）User inputs oneself brachium, shoulder breadth and place between the eyebrows to the distance in chest.According to the modeling of space geometry method and experience
Parameters of formula is adjusted, and calculates calibration physical distance of user's binocular to mobile phone screen under the posture.
（4）User identity is recognized into UID（User ID）, calibration physical distance, the calibration face of camera pixel coordinate system
The unique identification DID of characteristic point relative distance and the mobile phone（Device ID）It is saved into database.
When user uses mobile phone, program passes through the face of the front camera Real Time Observation user of mobile phone in running background
Portion's feature, measures relative distance of the face feature point in the camera pixel coordinate system, and proportionally method passes through（Formula 1）Meter
Calculate the physical distance that current phone user uses mobile phone.
（Formula 1）.
By comparing in current pixel coordinate system（Place between the eyebrows is to left eye distance/place between the eyebrows to right eye distance）With calibration pixel coordinate
In system（Place between the eyebrows is to left eye distance/place between the eyebrows to right eye distance）Numerical value change, calculating user, in the horizontal direction whether side face makes
Use mobile phone.
By comparing in current pixel coordinate system（Place between the eyebrows is to nose distance/nose to face distance）With calibration pixel coordinate
In system（Place between the eyebrows is to nose distance/nose to face distance）Numerical value change, whether calculate user in vertical direction pitching
Use mobile phone.
In order to ensure that user far uses mobile phone at 25 centimetres, as user using the physical distance of mobile phone less than 20 centimetres, or
When person is more than 30 centimetres, program automatic alarm.When side face is more than 10% in the horizontal direction by user, program automatic alarm.Work as user
When vertical direction pitching is more than 10%, program automatic alarm.
The mode of alarm includes but is not limited to dialog box prompting, sound, vibrations, screen locking etc..
This program should be present in the mobile phone operating system of multi-process in the way of background service, with other mobile phones using same
Shi Yunhang, or it is integrated into cell phone system or camera system as the form of chip.
For the iOS system of Apple Inc., in the consideration to safety, iOS rights management does not allow third-party hand
Machine application starts background service service calling mobile phone cameras for a long time.Therefore, method of the present invention is applied to apple
The mode of mobile phone, which should be, is integrated into iOS operating systems, or offer SDK kits are integrated into certainly to iOS mobile phone application developers
Skill machine application.
For the Android system of Google, the support due to Google to increasing income, method of the present invention
Using except android operating systems can be integrated into, provided to android mobile phones application developer beyond SDK kits, also
Cell phone system service service can be started by the way of independent cellphone application APP, for a long time resident android operations system
There is provided sight protectio service for system.
In addition, sex, the age information of user can be gathered using mobile phone camera.Taken by the big data of server end
Business, carries out user's portrait, produces data value.
The present invention provides following beneficial effect.
（1）Real-time sight protectio service is provided to cellphone subscriber, passes through distance, posture and the prompting eye health of time.
（2）The distance and posture of mobile phone are used using camera and computer vision technique observation user, common hand is assigned
The function of machine sight protectio, reduces hardware cost.
（3）Employ it is simple, easy, easily measure calibration method, reduce the use difficulty of user.
（4）By collecting sex, the age information of user, user's portrait is carried out, data value is produced.
Brief description of the drawings.
Fig. 1 is the program flow diagram that mobile phone health eye posture is monitored.
Fig. 2 is that new user's new equipment facial characteristics calibrates schematic diagram.
Fig. 3 is cell-phone customer terminal and server functional block diagram.
Fig. 4 is eye health warning reminding interface product sectional drawing.
Fig. 5 is that the product eye treasured android versions of application technology of the present invention download Quick Response Code.
Embodiment
The embodiment invented with reference to marginal data.
Fig. 1 is the flow chart of the method for the invention.After healthy eyeshield program starts, program first checks for the user's
UID（User ID）With the device identification number DID of the mobile phone（Device ID）Whether the pairing constituted is new record.If
It is then to start calibration procedure, the brachium, shoulder breadth and place between the eyebrows of active user is scaled to the body physical information of the distance in chest
Mobile phone screen to user's place between the eyebrows physical distance and save, active user current device camera pixel coordinate system
In positional information save.If it is not, then reading mobile phone screen of the active user of storage in calibration to user's place between the eyebrows
Physical distance and active user calibration when current device camera pixel coordinate system in positional information.
Afterwards, program enters recurrent state.First, program opens the front camera of mobile phone, shoots cellphone subscriber, record
Current time stamp.According to coordinate of the image recognition face feature point of active user in mobile phone camera pixel coordinate system, tool
The calculating point of body includes but is not limited to：The distance between eyes, left eye are to the distance of place between the eyebrows, the distance of right eye to place between the eyebrows, place between the eyebrows
The distance hit exactly to the distance of nose, nose to face.
Then, program current measurement data with calibration when data be compared.Proportionally method, is counted according to formula 1
Calculate the physical distance of active user and mobile phone.When the physical distance is less than specific threshold, such as 20 centimetres, or more than specific
Threshold value, such as at 30 centimetres, progress alarm and call user's attention eye distance from.The pixel of the left eye of active user to place between the eyebrows
Distance and right eye to the pixel distance of place between the eyebrows ratio and align mode when left eye to place between the eyebrows pixel distance and right eye to place between the eyebrows
The ratio of pixel distance be compared, if ratio is less than specific threshold, such as 90% or more than specific threshold, such as 110%
When, alarmed and remind user to correct horizontal direction eye posture.The pixel distance of the place between the eyebrows of active user to nose with
The pixel distance of the place between the eyebrows of user to nose is arrived with nose when the ratio and align mode of the pixel distance that nose is hit exactly to face
The ratio of pixel distance of face center is compared, if ratio is less than specific threshold, and such as 90% or more than specific threshold,
For example when 110%, the eye posture alarmed and remind user to correct vertical direction.
Then program judges that cellphone subscriber's is continuous between at the moment according to the timestamp for persistently observing user.When with the moment
Between more than 40 minutes after, remind user is with eye overlong time and carries out looking far into the distance rest.
Hereafter, program enters energy-saving mode.Stop mobile phone camera, and dormancy special time（Such as 1 minute）, etc.
Treat to arouse the circulation monitored into eye health again.
Fig. 2 is the schematic diagram that user carries out calibration operation.It is user's place between the eyebrows and mobile phone that the calibration operation, which needs to obtain calibration,
Between physical distance, and in the physical distance, face feature point is preposition in mobile phone when user is just to mobile phone front camera
Pixel coordinate in camera.
In order to keep just the correct of shooting image during to camera and stably.The method that the present invention is used is to allow user to keep
Both hands just hold mobile phone, and both arms extend to front farthest, and head is vertical straight to hold position.By observing shooting the video certainly in mobile phone
Mobile phone inclination angle is adjusted, record button is pressed when the auto heterodyne image in mobile phone is just to screen.
Now, the physical distance for obtaining place between the eyebrows to mobile phone can have two ways., can be straight with tape when someone helps
Measurement place between the eyebrows is connect to the physical distance of mobile phone front camera., can be by measuring brachium during unmanned help, shoulder breadth and place between the eyebrows are arrived
The distance in chest, calculates and obtains according to space geometry method.Its calculation formula is such as（Formula 2）With（Formula 3）It is shown.
（Formula 2）.
（Formula 3）.
The coordinate of face feature point is obtained by auto heterodyne image during analytic set.Needing the information of record includes but does not limit
In：The distance between eyes, left eye are to the distance of place between the eyebrows, distance, the distance of place between the eyebrows to nose of right eye to place between the eyebrows, nose to mouth
Ba Zhengzhong distance.
Fig. 3 is functional block diagram of the method applied in the present invention in mobile phone terminal and server end.In order to which quick response is used
Family is, it is necessary to carry out facial characteristics identification function in mobile phone terminal.In addition, mobile phone terminal also includes intelligent monitored control module, it is responsible for basis
The posture of user judges the eye health state of user；Prompting module, be responsible for using including but not limited to message, sound, vibration,
The modes such as screen locking remind cellphone subscriber '；With eye condition display module, it is responsible for the historical data of display user's eye, provides health
With the suggestion of eye；Communication module, is responsible for and server two-way communication, transmission data.In server end, comprising functional module
Have, user management module, be responsible for record user accounts information and calibration physical distance in each used equipment and
Calibrate face feature point pixel distance, and day conventional eye of user record；With eye health analysis module, it is responsible for being used according to user
Ophthalmic record, analysis user uses eye health status, the suggestion of feedback user eye health；Big data acquisition module is responsible for according to camera
The information such as user's sex, the age of collection carry out user's portrait, provide a user value-added service；Pay accounting module and be responsible for online
Pay and reconciliation management function, and communication module, it is responsible for and mobile phone terminal two-way communication, exchange data.
The product sectional drawing for the entitled eye treasured that Fig. 4 is developed by our company using presently disclosed method.Eye treasured is in mobile phone
Backstage and mobile phone games are run simultaneously, when user plays game on mobile phone because with eye distance from improper, eye is precious to be disappeared by ejecting
Cease prompting frame call user's attention eye distance from.
Fig. 5 is the product eye treasured android of our company's exploitation in the precious download Quick Response Code of Tengxun's application.
Claims (10)
1. one, by mobile phone front camera and computer vision technique, includes but is not limited to mobile phone, flat board electricity by monitoring
The eye posture of the users such as brain, desktop computer, the method for protection eye health, it is characterised in that including：
User carries out auto heterodyne calibration in specified posture by mobile phone front camera, record under the calibration posture user and mobile phone it
Between physical distance and mobile phone front camera pixel coordinate system in user's face feature coordinate points and distance, according to real-time
The method that the face feature information of collection calculates user's eye posture, calculates user according to the face feature information gathered in real time and connects
The continuous method between at the moment, according to eye posture, between at the moment and eye health doctor's advice calculating eye health status method, carry
The method that awake user notes the method with eye health, cell-phone customer terminal and remote server cooperating.
2. the method for protection eye health according to claim 1, its existence form in mobile phone is characterised by, is wrapped
Include but be not limited to：With the parallel operation of other mobile phones application in the form of background service in mobile phone, mobile phone is supplied in the form of SDK
The form for the functional module that application developer is applied as mobile phone is run simultaneously with mobile phone application, is used as mobile phone operating system
A part is integrated into the mobile phone operating system in future, and following hand is integrated into the form of individual chips or chip internal subsystem
The hardware system of machine, or the integrated nearly camera chip system in the form of individual chips or chip internal subsystem.
3. user according to claim 1 is in the method for specifying posture to carry out auto heterodyne calibration by mobile phone front camera,
It is characterised in that it includes but being not limited to：User's both hands just hold mobile phone, and both arms are lifted to front and stretched to maximum distance, and head is vertical straight,
Binocular fixation mobile phone front camera, both hands adjustment mobile phone orientation causes mobile phone to photograph user front, presses calibration knob guarantor
Deposit user's face characteristic.
4. the method for obtaining user and mobile phone physical distance of calibration posture according to claim 1, it is characterised in that bag
Include but be not limited to：In the case where other people help, direct measurement mobile phone front camera is to the physical distance between user's place between the eyebrows；Or it is logical
Brachium, shoulder breadth and the place between the eyebrows of measurement user are crossed to the physical distance in chest, calculates and forms according to method of geometry.
5. the acquisition mobile phone front camera picture of 3. calibration posture according to claim 1 according to claim 1
The coordinate points and distance of user's face feature in plain coordinate system, it is characterised in that include but is not limited to：Pass through face recognition algorithms
Eyes coordinate, place between the eyebrows coordinate, nose coordinate, mouth of the user in calibration in mobile phone front camera pixel coordinate system is obtained to sit
Mark etc., calculate user calibration when mobile phone front camera pixel coordinate system in eyes distance, left eye to place between the eyebrows distance, the right side
Eye arrives place between the eyebrows distance, place between the eyebrows to nose distance, nose to mouth centre distance etc..
6. the method that the face feature information that basis according to claim 1 is gathered in real time calculates user's eye posture, its
It is characterised by, includes but is not limited to：According to parameters such as the eyes pixel distances currently gathered, with the physical distance of align mode and
The parameters such as corresponding eyes pixel distance are compared, and proportionally method calculates the physical distance between active user and mobile phone；Root
According to the pixel distance and right eye of the left eye currently gathered to place between the eyebrows to the ratio of the pixel distance of place between the eyebrows, the left eye with align mode
Ratio to pixel distance and right eye to the pixel distance of place between the eyebrows of place between the eyebrows is compared, and calculates active user and is using mobile phone
When horizontal direction deflection；According to the pixel distance of the pixel distance and nose of the place between the eyebrows currently gathered to nose to mouth center
Ratio, compared with the ratio of place between the eyebrows to pixel distance and nose to the pixel distance at mouth center of nose of align mode
It is right, calculate the deflection of active user's vertical direction when using mobile phone.
7. the face feature information that basis according to claim 1 is gathered in real time calculates side of the user with eye continuous time
Method, it is characterised in that include but is not limited to：When mobile phone front camera observes that user's face is, records current time stamp,
The time that user continuously uses eye is calculated according to the historical record of timestamp.
8. it is according to claim 1 according to eye posture, between at the moment and eye health doctor's advice calculating eye health status
Method, it is characterised in that include but is not limited to：When user is exceeded using the distance of mobile phone or less than centered on 25 centimetres
Specified threshold scope when, remind user adjust with eye distance from；When posture horizontal direction or Vertical Square of the user using mobile phone
To when being deflected over formulation threshold value, remind user to adjust and uses eye posture；Threshold is specified when user is persistently exceeded using mobile phone time
During value, recommendation 45 minutes reminds user to rest and look far into the distance distant place scenery.
9. the call user's attention according to claim 1 method of eye health, it is characterised in that include but is not limited to：
Pop-up message frame, sound, vibration, screen locking, shutdown etc..
10. the method for cell-phone customer terminal according to claim 1 and remote server cooperating, it is characterised in that
Including but not limited to：Mobile phone terminal dispose face identification functions, intelligent monitoring function, prompting function, with eye condition display function,
With the bidirectional communication function of server end；Adopted in server end deployment subscriber management function, with eye health analysis function, big data
Collect function, pay billing function and the bidirectional communication function with mobile phone terminal.
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| CN107948399A (en) * | 2017-10-31 | 2018-04-20 | 广东小天才科技有限公司 | Eye care method, device, mobile terminal and the storage medium of mobile terminal |
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| CN107948399A (en) * | 2017-10-31 | 2018-04-20 | 广东小天才科技有限公司 | Eye care method, device, mobile terminal and the storage medium of mobile terminal |
| CN113469058A (en) * | 2021-07-02 | 2021-10-01 | 广东未来科技有限公司 | Method and mobile device for preventing myopia |
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Application publication date: 20170818 |