CN105893988A - Iris acquisition method and terminal thereof - Google Patents
Iris acquisition method and terminal thereof Download PDFInfo
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- CN105893988A CN105893988A CN201610341592.2A CN201610341592A CN105893988A CN 105893988 A CN105893988 A CN 105893988A CN 201610341592 A CN201610341592 A CN 201610341592A CN 105893988 A CN105893988 A CN 105893988A
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- iris
- iris image
- illumination
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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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/193—Preprocessing; Feature extraction
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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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/197—Matching; Classification
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- Ophthalmology & Optometry (AREA)
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- General Health & Medical Sciences (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention belongs to the biological acquisition and identity authentication technical field and relates to an iris acquisition method. The iris acquisition method includes the following steps that: the start event of an iris image pickup unit is responded, and the distance of a photographed object is obtained through a distance sensor; target illumination intensity corresponding to the distance is determined; and an event that infrared light is adjusted to the target illumination intensity is responded, and the iris image of the photographed object is acquired through the iris image pickup unit. In addition, the invention also provides an iris acquisition terminal. With the iris acquisition method and the iris acquisition terminal provided by the embodiments of the invention adopted, an automatic light adjustment mode is adopted, and an iris image with higher definition can be obtained more conveniently and quickly, and the experience of a user can be improved.
Description
[technical field]
The present invention relates to bio-identification and authentication techniques field, specifically, the present invention relates to a kind of rainbow
Film acquisition method and terminal thereof.
[background technology]
Growing along with Information technology, biometrics identification technology is the most increasingly dissolved into the day of people
Often in life.Due to greatly popularizing of smart machine, the requirement of device intelligence is grown with each passing day by people,
Areas of information technology are no exception, the most just include iris recognition and authentication techniques.Iris recognition and certification
Technology belongs to the one of living things feature recognition and secure authentication technology, is by utilizing the intrinsic life of human body
Thing feature or behavioural characteristic carry out personal identification safety certification, these biological or behavioural characteristics include face,
Fingerprint, iris, palmmprint, person's handwriting and voice, wherein iris is the tissue that health is the most complicated in the face of the external world,
And there is the biological nature such as biologically active, untouchable, uniqueness, stability, antifalsification, thus rainbow
Film identification is widely regarded as one of the most promising living things feature recognition and secure authentication technology, is tool
There are high accuracy, non-infringement, living things feature recognition easy to use and safety certifying method.
Based on above-mentioned iris recognition and the advantage of authentication techniques, this technology is developed application and has wide
Prospect.Iris identification method of the prior art and terminal are all to use single camera to carry out iris capturing,
Wherein, in order to terminal can get user's iris photo clearly, need user from Row sum-equal matrix human eye phase
For this terminal position and/or with the distance of this terminal device so that user operation bothers, and iris is correlated with
The acquisition overlong time of information, causes corresponding recognition time long, period client iris relevant information
Security is difficult to ensure, affects Consumer's Experience.
[summary of the invention]
Present invention aims to present at least one aspect not enough, it is provided that a kind of iris is adopted
Diversity method and terminal thereof, with the problem solving above at least one aspect.
In order to realize this purpose, the present invention adopts the following technical scheme that:
Present solution provides a kind of method for collecting iris, comprise the following steps:
In response to the startup event of iris image unit, by range sensor obtain subject away from
From；
Determine that this is apart from corresponding target intensity of illumination；
The event of described target intensity of illumination it is adjusted to, by described iris image unit in response to infrared light
Gather the iris image of subject.
Concrete, according to the corresponding conversion rule between described distance and the described target intensity of illumination preset,
Determine that this is apart from corresponding target intensity of illumination.
Further, determine that the light modulation corresponding to described target intensity of illumination drives signal；
Input this light modulation and drive signal, to adjust described infrared light to described target intensity of illumination.
Concrete, described light modulation drives signal to be pulse width modulated wave.
Further, the subscriber identity information characterized described iris image differentiates.
Concrete, from the iris image gathered, extract characteristic point；
The characteristic point of extraction is compared, according to comparative result to iris with the iris templates information prestored
The subscriber identity information that image is characterized differentiates.
Concrete, by the iris image of described collection is split, extract characteristic point therein.
Concrete, when the characteristic point extracted is with the iris templates information match prestored, determine described use
The identity at family is legal.
Further, the solution latching operation to the machine is performed.
Further, the iris image of subject is gathered by described iris image unit；
Extract the characteristic point in described iris image and be processed as the storage of iris templates information.
Concrete, described iris templates information is encrypted and stores.
This programme also provides for a kind of iris capturing terminal, including with lower module:
Acquisition module, for the startup event in response to iris image unit, is obtained by range sensor
The distance of subject；
Determine module, for determining that this is apart from corresponding target intensity of illumination；
Perform module, for being adjusted to the event of described target intensity of illumination in response to infrared light, by institute
State iris image unit and gather the iris image of subject.
Concrete, described determine module, for according to the described distance preset and described target intensity of illumination
Between corresponding conversion rule, determine that this is apart from corresponding target intensity of illumination.
Further, also include light-adjusting module, for determining the tune corresponding to described target intensity of illumination
Optical drive signal；
Input this light modulation and drive signal, to adjust described infrared light to described target intensity of illumination.
Concrete, described light modulation drives signal to be pulse width modulated wave.
Concrete, also include identification module, for the user identity letter that described iris image is characterized
Breath differentiates.
Further, described identification module, also include:
Extraction unit, for extracting characteristic point from the iris image gathered；
Discriminating unit, for the characteristic point of extraction is compared with the iris templates information prestored, according to
The subscriber identity information that iris image is characterized by comparative result differentiates.
Concrete, described extraction unit, it is additionally operable to by the iris image of described collection is split,
Extract characteristic point therein.
Concrete, described discriminating unit, it is additionally operable to when the characteristic point extracted and the iris templates information prestored
When matching, determine that the identity of described user is legal.
Concrete, described discriminating unit, it is additionally operable to after the described identity determining described user is legal,
Perform the solution latching operation to the machine.
Further, described identification module, it is additionally operable at the user identity that described iris image is characterized
Before information differentiates, gathered the iris image of subject by described iris image unit；
Extract the characteristic point in described iris image and be processed as the storage of iris templates information.
Concrete, described identification module, it is additionally operable to described iris templates information is encrypted and is stored.
Compared with prior art, the present invention at least has the advantage that
The present invention utilize Distance-sensing Equipment Inspection human eye to the distance of terminal device, by human eye to terminal
The distance of equipment and the corresponding relation of target intensity of illumination, and then adjust corresponding target intensity of illumination, subtract
Few user's trouble from Row sum-equal matrix self Yu the spacing of equipment, enable iris image unit convenient,
Obtain the iris image clearly of user quickly.
Further, the present invention is also to the user-dependent rainbow for differentiating user identity legitimacy prestored
The process such as film information is encrypted, have preferably ensured the safety of userspersonal information.
Further, this iris recognition and authentication techniques are also applied the unblock at smart machine by the present invention
On, by obtaining and identify the iris information of user, the identity of user is confirmed, when confirming user
When identity is legal, it is unlocked, provides the user a kind of brand-new unlocking manner, improve the experience of user
Degree.
[accompanying drawing explanation]
Aspect that the present invention is above-mentioned and/or additional and advantage are from description to embodiment below in conjunction with the accompanying drawings
In will be apparent from easy to understand, wherein:
Fig. 1 is the program flow diagram of an embodiment of method for collecting iris of the present invention；
Fig. 2 is the program flow diagram of an embodiment of method for collecting iris of the present invention；
Fig. 3 is the structured flowchart of an embodiment of iris capturing terminal of the present invention；
Fig. 4 is the structured flowchart of an embodiment of iris capturing terminal of the present invention.
[detailed description of the invention]
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, wherein
The most same or similar label represents same or similar element or has same or like function
Element.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and
It is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative used herein
" one ", " one ", " described " and " being somebody's turn to do " may also comprise plural form.Will be further understood that
, the wording used in the specification of the present invention " includes " referring to there is described feature, integer, step
Suddenly, operation, element and/or assembly, but it is not excluded that existence or add other features one or more,
Integer, step, operation, element, assembly and/or their group.It should be understood that when we claim element quilt
" connecting " or during " coupled " to another element, it can be directly connected or coupled to other elements, or
Intermediary element can also be there is in person.Additionally, " connection " used herein or " coupling " can include nothing
Line connects or wireless couples.Wording "and/or" used herein includes one or more row being associated
Go out the whole of item or any cell and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (bag
Include technical term and scientific terminology), have with the those of ordinary skill in art of the present invention is general
Understand identical meaning.Should also be understood that those terms defined in such as general dictionary, it should
It is understood to that there is the meaning consistent with the meaning in the context of prior art, and unless as here one
Sample, by specific definitions, otherwise will not be explained by idealization or the most formal implication.
Those skilled in the art of the present technique are appreciated that " terminal " used herein above, " terminal device "
Both having included the equipment of wireless signal receiver, it only possesses the setting of wireless signal receiver of non-emissive ability
Standby, include again the equipment receiving and launching hardware, it has and can carry out double on bidirectional communication link
To reception and the equipment of transmitting hardware of communication.This equipment may include that honeycomb or other communication equipments,
It has single line display or multi-line display or the honeycomb not having multi-line display or other communication
Equipment；PCS (Personal Communications Service, PCS Personal Communications System), it is permissible
Combine voice, data process, fax and/or its communication ability；PDA(Personal Digital
Assistant, personal digital assistant), it can include radio frequency receiver, pager, internet/interior
Internet interview, web browser, notepad, calendar and/or GPS (Global Positioning System,
Global positioning system) receiver；Conventional laptop and/or palmtop computer or other equipment, it has
And/or include the conventional laptop of radio frequency receiver and/or palmtop computer or other equipment.Here institute
Use " terminal ", " terminal device " can be portable, can transport, be arranged on the vehicles (boat
Sky, sea-freight and/or land) in, or be suitable for and/or be configured at local runtime, and/or to divide
Cloth form, any other position operating in the earth and/or space is run." terminal " used herein above,
" terminal device " can also is that communication terminal, access terminals, music/video playback terminal, the most permissible
Be PDA, MID (Mobile Internet Device, mobile internet device) and/or have music/
The mobile phone of video playback capability, it is also possible to be the equipment such as intelligent television, Set Top Box.
It is necessary that first application scenarios and principle thereof to the present invention carries out following guiding explanation.
The method of the present invention and the application scenarios of terminal, be with iris image unit and visualization
The smart machine of display interface is terminal described below.Such as intelligent watch and smart mobile phone etc., its
Middle iris image unit can be iris camera, can be used for gathering the characteristic information that client iris is relevant,
And in smart machine, it is provided with authenticating unit, it is simple to in the iris image gathered in authenticating unit
Characteristic point processes and stores, in order to differentiate user identity.It should be noted that this description
Being only exemplary, the scope of the present invention is not limited to this.
The present invention's that will be detailed below proposing to use above-mentioned principle to realize above-mentioned scene
The detailed description of the invention of some technical schemes.It should be noted that the invention provides a kind of iris capturing
Method and terminal, describe this method for collecting iris from the visual angle of terminal, can be by programming by this iris
Acquisition method is embodied as computer program and realizes on intelligent terminal, its include but not limited to intelligent watch,
Smart mobile phone, intelligent verification terminal etc. need the equipment authenticating user identity.
Refer to Fig. 1, for the program flow diagram of an embodiment of method for collecting iris of the present invention, specifically
Comprise the following steps:
Step S11, in response to the startup event of iris image unit, is obtained by range sensor and is clapped
Take the photograph the distance of object；
It should be noted that the smart mobile phone with android system as operating system is in following steps
One embodiment of described smart machine, present invention can also apply to IOS system or WINDOS system etc.
Smart machine, this embodiment can not be construed as limiting the invention.
Concrete, smart mobile phone starts the event of iris image unit by monitoring, and opens range sensor
Obtain the range data between human eye and equipment.In an exemplary embodiment of this programme, using
In the smart mobile phone of android system, android system is provided with SensorManager manager to intelligence
Range sensor on energy mobile phone is managed, and provides Sensor class to provide the user corresponding behaviour
Make.Concrete, obtained the type of sensor by SensorManger, i.e. TYPE_PROXIMITY,
Thus sensor of adjusting the distance is managed, and utilize
Android.hardware.SensorEventListener interface registration monitor is adjusted the distance sensor
Sensed data monitor, further, in order to obtain concrete detection data, by monitor
Concrete monitor method, such as, can adjust when the value of the signal of telecommunication produced by range sensor changes
By OnSensorChanged () method, or, when the precision of the signal of telecommunication produced by range sensor occurs
The modes such as OnAccuracyChanged () method can be called during change detected to obtain this range sensor
The sensed data arrived, by being analyzed this relevant sensed data, it is possible to obtain eyes of user and this intelligence
Distance D between energy mobile phone.
It should be noted that the eyes of user that obtained by range sensor of above-mentioned smart mobile phone and this intelligence
Distance D between mobile phone is that the information being blocked by smart mobile phone by range sensor changes into the signal of telecommunication also
Obtain after treatment.Concrete, in an exemplary embodiment of this programme, range sensor
(Proximity Sensor) is made up of an infrared transmitting tube and an infrared receiver pole pipe, energising
After, the infrared light that infrared tube is launched is not owing to having shelter to reflect infrared signal, and infrared receiving tube does not move
Make；When there being shelter, can reflect infrared light, after reception pipe receives signal, infrared tube turns on, and sends out
Go out interrupt signal.Additionally, utilize its shortest light pulse launched, measure this light pulse from being transmitted into
It is reflected by the object the time returned, calculates the distance between object, institute the most of the present invention by the survey time
The sensed data stated can be by smart mobile phone by carrying out this interrupt signal and corresponding temporal information thereof point
Analysis, the range data being calculated between corresponding eyes of user and this smart mobile phone.
It should be noted that the above-mentioned range sensor being previously mentioned belongs to infrared pulse sensor, simply institute
State an embodiment of range sensor, it is impossible to be construed as limiting the invention, the inspection used according to it
Survey method is different, described range sensor can also is that optical displacement sensor, linear proximity transducer,
Ultrasonic displacement sensors etc., additionally, electrical distance sensor can also is that range sensor and ambient light pass
The similar device that can detect user distance terminal device distance such as sensor integrated, here is omitted.
Further, step S12, determine that this is apart from corresponding target intensity of illumination；
Concrete, according to the corresponding conversion rule between described distance and the described target intensity of illumination preset,
Determine that this is apart from corresponding target intensity of illumination.
It should be noted that in an exemplary embodiment of this programme, in order to realize iris camera
Optimal acquisition effect, can by mobile phone register preset mentioned by range sensor obtain
Human eye and mobile phone distance D and the relation table of the I of led luminous intensity, such as:
| Human eye and mobile phone distance D | The I of led luminous intensity |
| D1=0～5cm | I1 |
| D2=5～10cm | I2 |
| D3=5～15cm | I3 |
Corresponding relation that is concrete, that provided by this table, smart mobile phone can obtain in step S1 and be obtained
The LED luminous intensity that the human eye taken is corresponding with distance D (D1/D2/D3) between smart mobile phone
I (I1/I2/I3), it should be noted that when this LED luminous intensity is I (I1/I2/I3), iris is taken the photograph
As head can obtain the effect of optimal collection client iris.
Concrete, in an exemplary embodiment of this programme, under android system intelligent hand
Machine, is adjusted the distance by android.hardware.SensorEventListener interface registration monitor
The sensed data of sensor is monitored, further, by the concrete monitor method of monitor, example
As, OnAccuracyChanged () method obtains the change of the precision of the signal of telecommunication produced by range sensor
Change, and then judge whether this change in electric meets the light modulation that execution is corresponding by simple discriminant function
The condition of statement, wherein, this condition is arranged to corresponding LED luminous intensity, if meeting, then performs
This corresponding light modulation statement.
Further, at the LED that above-mentioned distance D (D1/D2/D3) determined between human eye with smart mobile phone is corresponding
After the step of luminous intensity I (I1/I2/I3), comprise the following steps:
Determine that the light modulation corresponding to described target intensity of illumination drives signal；
Input this light modulation and drive signal, to adjust described infrared light to described target intensity of illumination.
It should be noted that in an exemplary embodiment of this programme, described target intensity of illumination is led to
Cross by the intensity of illumination institute being used for launching to subject the luminaire of light in smart mobile phone or external equipment
Determining, described luminaire can be infrared LED, described LED luminous intensity I (I1/I2/I3) also correspondence
Signal is driven, for regulating the luminous intensity of LED in smart mobile phone in corresponding light modulation.
Concrete, in an exemplary embodiment of this programme, described light modulation drives signal to be that pulsewidth is adjusted
Ripple PWM processed, is input in the power supply of infrared LED by this Pulse width modulate wave PWM, by adjusting
The dutycycle of this PWM ripple, can adjust the electric current being input in this infrared LED lamp, and then can adjust
The intensity of illumination of this infrared LED, and then adjust the intensity of illumination of this infrared LED arrival subject.
It should be noted that the method that described Pulse width modulate wave PWM regulates LED light strong is to be opened by use
Close circuit and change the mean value of light output with the work of sufficiently high frequency for eye recognition power
(digital dimming) realizes.In an exemplary embodiment of this programme, can be use the simplest
The method of single digital dimming, be i.e. set by pulse width modulation (PWM) cycle and duty cycle come right
LED is adjusted, in addition to this it is possible to be to control voltage by one proportionally to change LED
The simulation light-dimming method of the output driven realizes the regulation to LED, and therefore, it is right that this embodiment is not constituted
The restriction of the present invention.
Further, step S13, the event of described target intensity of illumination it is adjusted in response to infrared light,
The iris image of subject is gathered by described iris image unit.
It should be noted that in an exemplary embodiment of this programme, described iris image unit
The infrared light sent by infrared LED by reception is run into shelter (such as human eye) and reflects afterwards
Infrared light, and then gather the iris image of user.Wherein, certain is reached when the reflection light of described infrared light
When one value or a certain scope, described iris image unit will obtain iris image the most clearly.
Concrete, in an exemplary embodiment of this programme, iris image unit described here is adopted
Collection iris image, can essentially be that the iris camera by this iris image unit constantly scans pre-
Look at the iris image of subject, when scanning new iris image, the iris scanned before can be covered
Image, does not stores iris image before, and the iris image scanned when this iris camera reaches
During to the definition preset, this iris image is stored；Or, when the reflection light of described infrared light
When reaching some value or a certain scope, i.e. shone to described target light by the described infrared light of aforementioned adjustment
After the step of intensity, this iris camera will be actuated for scanning, and the iris that will be obtained
Image stores, thus described iris camera will obtain iris image the most clearly.
Further, in described step S13 of this programme, it is taken by iris recognition unit collection right
After the step of the iris image of elephant, further comprise the steps of:
The subscriber identity information being characterized described iris image differentiates.
Concrete, refering to Fig. 2, for the program circuit of an embodiment of method for collecting iris of the present invention
Figure, comprises the following steps:
Step S21, extracts characteristic point from the iris image gathered；
Step S22, compares the characteristic point of extraction with the iris templates information prestored, according to comparing
The subscriber identity information that iris image is characterized by result differentiates.
Concrete, the iris image gathered by described iris image unit is sent in the authenticating unit preset,
The subscriber identity information being characterized this iris image differentiates.An exemplary enforcement at this programme
In example, concrete, after gathering iris image by described iris image unit, iris image is sent to
Processor extracts its characteristic point, then this feature point is sent to authenticating unit, further, to institute
State the subscriber identity information that iris image characterized when differentiating, need by the characteristic point of extraction with prestore
Iris templates information compare, carry out according to the user identity that iris image is characterized by comparative result
Differentiate.
Concrete, in an exemplary embodiment of this programme, by the iris image to described collection
Split, extract characteristic point therein.Concrete, can be by the iris image gathered be carried out
Cutting, is filled to black by the illumination spot in pupil, find grey value profile minimum a bit, and tie
The edge detection calculation closing pupil goes out four radiuses up and down, averages according to these four radiuses the most right
Pupil center is modified；Hough transform is utilized to obtain centre coordinate and the radius parameter of iris cylindrical；
According to pupil and the radius of iris cylindrical and centre coordinate parameter by the pupil within iris and outside other
Image all cuts away, and remaining image section is the characteristic point of the iris image split.
Further, the characteristic point of described iris image is compared with the iris templates information prestored.
Concrete, in an exemplary embodiment of this programme, by the use that prestores in smart mobile phone register
The iris information at family, this iris information can be the iris templates information through processing, by by described rainbow
The characteristic point of film image compares with this iris templates information, if being consistent, then judges that this subject is
The user that this iris templates prestored is corresponding.
Further, in an exemplary embodiment of this programme, described in the iris templates information that prestores
Can be stored in database, after smart mobile phone detects and user identity is carried out discriminating event,
From database, transfer corresponding iris templates information, complete discrimination process in this locality；Additionally, iris mould
Plate information can also be stored in the reliable server end of third party, differentiates event in response to user identity
After provide the user corresponding iris templates information, or by user's smart mobile phone end to this believable 3rd
Side sends iris feature dot information, and completes discrimination process at third-party server end, and then by third party
Providing the user corresponding remote service etc., this programme is not to the storage position of iris templates and differentiates that place is done
Limit, be more than exemplary, be not construed as limiting the invention.
Further, carry out at described subscriber identity information iris image characterized according to comparative result
In the step differentiated, comprise the following steps:
When the characteristic point extracted is with the iris templates information match prestored, determine the identity of described user
Legal.
Further, the solution latching operation to the machine is performed.
Concrete, in an exemplary embodiment of this programme, when the iris image of aforementioned extraction
Characteristic point and preset iris templates information match time, i.e. determine when the identity of described user is legal,
If now user's smart mobile phone is in screen protection state, open by performing an Activity thread
ScreenService services, and registers a monitor monitoring sensed data, work as monitoring in this service
Characteristic point and the iris masterplate preset to iris image match, and determine the thing that the identity of user is legal
During part, releasing screen locking mode is used to be unlocked.Described unlocking manner, concrete,
Keyguard is managed by KeyguardManager class, is i.e. managed screen locking, smart mobile phone
Utilize in its inner classes KeyguardManager.KeyguardLock provided
DisableKeyguard () method releases screen locking.
Further, the step differentiated at the subscriber identity information that described iris image is characterized it
Before, further comprise the steps of:
The iris image of subject is gathered by described iris image unit；
Extract the characteristic point in described iris image and be processed as the storage of iris templates information.
Concrete, in an exemplary embodiment of this programme, it can be appreciated that to passing through in the present invention
Iris image unit gathers the spy in the iris image in eyes image, and the described iris image that will extract
Levy the step being a little processed as iris templates information and storing, relative to aforementioned acquisition iris image, extract spy
The order levying a little relevant step does not limits, if according to the iris image gathered to iris image institute
Before the subscriber identity information characterized carries out the step differentiated.
It should be noted that during the iris templates generated in authenticating unit, by described iris
Image unit gathers the step of the iris image of subject, in an exemplary embodiment of this programme
In, use the mode gathering iris image as aforementioned and extract the mode of image characteristic point, but this
The technical staff in field can be realized by other similar different modes, is not construed as limiting the invention.
Further, in order to further improve the security of whole system, show of the present invention
In example embodiment, after the characteristic point in extracting described iris image, send to default authenticating unit
Described characteristic point, and in described authenticating unit, described characteristic point be processed as iris templates information and store.
Further, described iris templates information is encrypted and stores.
Concrete, in an exemplary embodiment of this programme, it is also possible to the iris mould that processing is obtained
Plate information is stored in the memory cell in authenticating unit after being encrypted, such as static memory RAM or ROM
In divided security partitioning, symmetric encipherment algorithm or rivest, shamir, adelman wherein can be used to realize adding
Close, concrete AES is not limited by the present embodiment.Iris information in described memory cell is permissible
Relate to single people, it is also possible to relate to the most individual；Wherein said memory cell can include that such as flash memory type is deposited
Reservoir, hard-disc type memory, multimedia card micro memory, card type memory, magnetic memory, magnetic
Dish, CD, RAM, SRAM, EEPROM and PROM storage medium at least one.
Further, in order to improve the characteristic point of iris image and described iris templates information carry out differentiating right
Than time processing speed, reduce the memory capacity of iris templates, in an exemplary reality of the present invention simultaneously
Execute in example, when the characteristic point of described iris image is processed or is transformed to iris image template, can use
A series of algorithm processes, it is, for example possible to use Fourier transformation or wavelet transformation are by iris figure
Iris image template is obtained as processing.
Further, according to the function modoularization thinking of computer software, present invention also offers a kind of employing
The terminal of this method for collecting iris, refers to Fig. 3.This equipment includes acquisition module 11, determines module 12
With execution module 13, utilize this acquisition module 11, determine module 12 and perform module 13 to erect rainbow
The principle framework of film acquisition terminal, thus realize modularization embodiment.Disclose each module in detail below real
Existing concrete function.
Refer to Fig. 3, for the structured flowchart of an embodiment of iris capturing terminal of the present invention, specifically wrap
Include with lower module:
Acquisition module 11, for the startup event in response to iris image unit, is obtained by range sensor
Take the distance of subject；
It should be noted that the following smart mobile phone with android system as operating system is described intelligence
One embodiment of energy equipment, present invention can also apply to the intelligence of IOS system or WINDOS system etc.
Equipment, this embodiment can not be construed as limiting the invention.
Concrete, described acquisition module 11, by monitoring the event starting iris image unit, opens distance
Sensor obtains the range data between human eye and equipment.In an exemplary embodiment of this programme,
In the smart mobile phone using android system, android system is provided with SensorManager pipe
Range sensor on smart mobile phone is managed by reason device, and provides Sensor class to provide the user phase
The operation answered.Concrete, obtained the type of sensor by SensorManger, i.e.
TYPE_PROXIMITY, thus sensor of adjusting the distance is managed, and utilize
Android.hardware.SensorEventListener interface registration monitor is adjusted the distance sensor
Sensed data monitor, further, in order to obtain concrete detection data, by monitor
Concrete monitor method, such as, can adjust when the value of the signal of telecommunication produced by range sensor changes
By OnSensorChanged () method, or, when the precision of the signal of telecommunication produced by range sensor occurs
The modes such as OnAccuracyChanged () method can be called during change detected to obtain this range sensor
The sensed data arrived, by being analyzed this relevant sensed data, it is possible to obtain eyes of user and this intelligence
Distance D between energy mobile phone.
It should be noted that the eyes of user that obtained by range sensor of above-mentioned acquisition module 11 and this intelligence
Distance D between energy mobile phone is that the information being blocked by smart mobile phone by range sensor changes into the signal of telecommunication
And obtain after treatment.Concrete, in an exemplary embodiment of this programme, Distance-sensing
Device (Proximity Sensor) is made up of an infrared transmitting tube and an infrared receiver pole pipe, logical
After electricity, the infrared light that infrared tube is launched is not owing to having shelter to reflect infrared signal, and infrared receiving tube does not has
Action；When there being shelter, can reflect infrared light, after reception pipe receives signal, infrared tube turns on,
Send interrupt signal.Additionally, utilize its shortest light pulse launched, measure this light pulse from transmitting
To being reflected by the object the time returned, calculate the distance between object, the i.e. present invention by the survey time
Described sensed data can be by smart mobile phone by carrying out this interrupt signal and corresponding temporal information thereof
The range data analyze, being calculated between corresponding eyes of user and this smart mobile phone.
It should be noted that the above-mentioned range sensor being previously mentioned belongs to infrared pulse sensor, simply institute
State an embodiment of range sensor described in acquisition module 11, it is impossible to be construed as limiting the invention,
Different according to its detection method used, described range sensor can also is that optical displacement sensor,
Linear proximity transducer, ultrasonic displacement sensor etc., additionally, electrical distance sensor can also is that distance
The integrated of the device of operation the most do not touched by sensor with similar users of detection such as ambient light sensors,
Here is omitted.
Further, determine module 12, for determining that this is apart from corresponding target intensity of illumination；
Concrete, described determine that module 12 is according between default described distance and described target intensity of illumination
Corresponding conversion rule, determine that this is apart from corresponding target intensity of illumination.
It should be noted that for the optimal acquisition effect realizing iris camera, at one of this programme
In exemplary embodiment, mobile phone register is preset the human eye obtained mentioned by range sensor and hand
The relation table of the I of machine distance D and led luminous intensity, such as:
| Human eye and mobile phone distance D | The I of led luminous intensity |
| D1=0～5cm | I1 |
| D2=5～10cm | I2 |
| D3=5～15cm | I3 |
Corresponding relation that is concrete, that provided by this table, determines that module 12 can obtain acquisition module
The LED luminous intensity that human eye acquired in 11 is corresponding with distance D (D1/D2/D3) between smart mobile phone
I (I1/I2/I3), it should be noted that when the luminous intensity of this LED is I (I 1/I2/I3), iris
Camera can obtain the effect of optimal collection client iris.
Concrete, in an exemplary embodiment of this programme, under android system intelligent hand
Machine, is adjusted the distance by android.hardware.SensorEventListener interface registration monitor
The sensed data of sensor is monitored, further, by the concrete monitor method of monitor, example
As, OnAccuracyChanged () method obtains the change of the precision of the signal of telecommunication produced by range sensor
Change, and then judge whether this change in electric meets the light modulation that execution is corresponding by simple program code
The condition of statement, this condition setting is corresponding LED luminous intensity, if meeting, then performs this corresponding
Light modulation statement.
Further, in above-mentioned distance D (D1/D2/D3) determining that module 12 determines between human eye and smart mobile phone
After corresponding LED luminous intensity I (I1/I2/I3), also include light-adjusting module, be used for:
Determine that the light modulation corresponding to described target intensity of illumination drives signal；
Input this light modulation and drive signal, to adjust described infrared light to described target intensity of illumination.
It should be noted that in an exemplary embodiment of this programme, described target intensity of illumination is led to
Cross by the intensity of illumination institute being used for launching to subject the luminaire of light in smart mobile phone or external equipment
Determining, described luminaire can be infrared LED, described LED luminous intensity I (I1/I2/I3) also correspondence
Signal is driven, for regulating the luminous intensity of LED in smart mobile phone in corresponding light modulation.
Concrete, the light modulation that described light-adjusting module utilizes drives signal to be Pulse width modulate wave PWM, by this
Pulse width modulate wave PWM is input in the power supply of infrared LED, by adjusting the dutycycle of this PWM ripple,
The electric current being input in this infrared LED lamp can be adjusted, and then the illumination that can adjust this infrared LED is strong
Degree, and then adjust the intensity of illumination of this infrared LED arrival subject.
It should be noted that the method that described Pulse width modulate wave PWM regulates LED light strong is to be opened by use
Close circuit and change the mean value of light output with the work of sufficiently high frequency for eye recognition power
(digital dimming) realizes.In an exemplary embodiment of this programme, can be use the simplest
The method of single digital dimming, be i.e. set by pulse width modulation (PWM) cycle and duty cycle come right
LED is adjusted, in addition to this it is possible to be to control voltage by one proportionally to change LED
The simulation light-dimming method of the output driven realizes the regulation to LED, and therefore, it is right that this embodiment is not constituted
The restriction of the present invention.
Further, perform module 13, for being adjusted to described target intensity of illumination in response to infrared light
Event, gathers the iris image of subject by described iris image unit.
It should be noted that in an exemplary embodiment of this programme, described iris image unit
The infrared light sent by infrared LED by reception is run into shelter (such as human eye) and reflects afterwards
Infrared light, and then gather the iris image of user.Wherein, certain is reached when the reflection light of described infrared light
When one value or a certain scope, described iris image unit will obtain iris image the most clearly.
Concrete, in an exemplary embodiment of this programme, in execution module 13 described here
Iris image unit gathers iris image, can essentially be to be imaged by the iris of this iris image unit
Head constantly scans the iris image of preview subject, when scanning new iris image, can cover
The iris image before scanned, does not stores iris image before, when this iris camera is swept
When the iris image retouched reaches default definition, this iris image is stored；Or, when described
When the reflection light of infrared light reaches some value or a certain scope, i.e. by the described infrared light of aforementioned adjustment
After the step of described target intensity of illumination, this iris camera will be actuated for scanning, and
The iris image obtained is stored, thus described iris camera will obtain rainbow the most clearly
Film image.
Further, the described execution module 13 at this programme be taken by iris recognition unit collection right
After the iris image of elephant, also include identification module:
Described identification module, differentiates for the subscriber identity information being characterized described iris image.
Concrete, refering to Fig. 4, for the structured flowchart of an embodiment of iris capturing terminal of the present invention,
In described identification module, including:
Extraction unit 21, for extracting characteristic point from the iris image gathered；
Discriminating unit 22, for the characteristic point of extraction is compared with the iris templates information prestored, root
The subscriber identity information characterized iris image according to comparative result differentiates.
It should be noted that aforementioned authenticating unit is conceptual description, described discriminating unit 22 is this mirror
The materialization of power unit, will retouch with the authenticating unit on this discriminating unit 22 replacement conceptual sense below
State.
Concrete, the iris image that described iris image unit is gathered by identification module sends into the mirror preset
In other unit 22, the subscriber identity information being characterized this iris image differentiates.At this programme one
In individual exemplary embodiment, concrete, described identification module gathers iris by described iris image unit
After image, it is sent to iris image in processor be extracted its characteristic point by extraction unit 21, the most again will
This feature point is sent to discriminating unit 22, and further, discriminating unit 22 is to described iris image institute table
When the subscriber identity information levied differentiates, need the characteristic point of extraction and the iris templates information prestored
Compare, differentiate according to the user identity that iris image is characterized by comparative result.
Concrete, in an exemplary embodiment of this programme, described extraction unit 21 is by described
The iris image gathered is split, and extracts characteristic point therein.Concrete, this extraction unit 21
Illumination spot in pupil can be filled to black by the iris image gathered is cut, looks for
To grey value profile minimum a bit, and the edge detection calculation combining pupil goes out four radiuses up and down,
Average according to these four radiuses and again pupil center is modified；Hough transform is utilized to obtain iris
The centre coordinate of cylindrical and radius parameter；Will according to pupil and the radius of iris cylindrical and centre coordinate parameter
Pupil within iris and other outside images all cut away, and remaining image section is for splitting
The characteristic point of iris image.
Further, the characteristic point of described iris image is compared with the iris templates information prestored.
Concrete, in an exemplary embodiment of this programme, by the use that prestores in smart mobile phone register
The iris information at family, this iris information can be the iris templates information through processing, by by described rainbow
The characteristic point of film image compares with this iris templates information, if being consistent, then judges that this subject is
The user that this iris templates prestored is corresponding.
Further, in an exemplary embodiment of this programme, described in the iris templates information that prestores
Can be stored in database, after smart mobile phone detects and user identity is carried out discriminating event,
From database, transfer corresponding iris templates information, complete discrimination process in this locality；Additionally, iris mould
Plate information can also be stored in the reliable server end of third party, differentiates event in response to user identity
After provide the user corresponding iris templates information, or by user's smart mobile phone end to this believable 3rd
Side sends iris feature dot information, and completes discrimination process at third-party server end, and then by third party
Providing the user corresponding remote service etc., this programme is not to the storage position of iris templates and differentiates that place is done
Limit, be more than exemplary, be not construed as limiting the invention.
Further, described discriminating unit 22 is in the described use characterized iris image according to comparative result
During family identity information differentiates, it is additionally operable to:
When the characteristic point extracted is with the iris templates information match prestored, determine the identity of described user
Legal.
Further, described discriminating unit 22 is additionally operable to perform the solution latching operation to the machine.
Concrete, judge the iris image when aforementioned extraction unit 21 extracts by described discriminating unit 22
Characteristic point and the iris template information preset match, i.e. determine when the identity of described user is legal,
In one exemplary embodiment of this programme, when user's smart mobile phone is in screen protection state, by performing
One Activity thread opens ScreenService service, registers one and monitor sensing in this service
The monitor of data, when the characteristic point and the iris masterplate preset listening to iris image matches, determines
During the legal event of the identity of user, use and release screen locking mode and be unlocked.Described unlocking manner, tool
Body, Keyguard is managed by KeyguardManager class, is i.e. managed screen locking, intelligence
Mobile phone utilizes in its inner classes KeyguardManager.KeyguardLock provided
DisableKeyguard () method releases screen locking.
Further, the subscriber identity information characterized described iris image at described identification module is carried out
Before discriminating:
Described identification module, is additionally operable to be gathered the iris figure of subject by described iris image unit
Picture；
Extract the characteristic point in described iris image and be processed as the storage of iris templates information.
Concrete, in an exemplary embodiment of this programme, it can be appreciated that to passing through in the present invention
Iris image unit gathers the spy in the iris image in eyes image, and the described iris image that will extract
Levy the step being a little processed as iris templates information and storing, relative to the sequence of operation of aforementioned execution module 13
Do not limit, if the user's body according to the iris image gathered, iris image characterized at identification module
Before part information differentiates.
It should be noted that during the iris templates generated in discriminating unit 22, by described rainbow
Film image unit gathers the step of the iris image of subject, in an exemplary enforcement of this programme
In example, use the side gathering iris image as iris image unit in aforesaid execution module 13
The mode extracting image characteristic point that formula is the same with in extraction unit 21, but those skilled in the art is permissible
Realized by other similar different modes, be not construed as limiting the invention.
Further, in order to further improve the security of whole system, show of the present invention
In example embodiment, after the characteristic point in extraction unit 21 extracts described iris image, to default mirror
Other unit 22 sends described characteristic point, and in described discriminating unit 22, described characteristic point is processed as rainbow
Film Template Information also stores.
Further, described identification module, it is additionally operable to described iris templates information is encrypted and is stored.
Concrete, in an exemplary embodiment of this programme, processing can also be obtained by identification module
Iris templates information be encrypted after be stored in the memory cell in discriminating unit 22, such as static memory
In the divided security partitioning of RAM or ROM, wherein can use symmetric encipherment algorithm or asymmetric encryption
Algorithm realizes encryption, and concrete AES is not limited by the present embodiment.In described memory cell
Iris information can relate to single people, it is also possible to relates to the most individual；Wherein said memory cell can include
Such as flash memory type memory, hard-disc type memory, multimedia card micro memory, card type memory,
Magnetic memory, disk, CD, RAM, SRAM, EEPROM and PROM storage medium at least one
Individual.
Further, in order to improve the characteristic point of iris image and described iris templates information carry out differentiating right
Than time processing speed, reduce the memory capacity of iris templates, in an exemplary reality of the present invention simultaneously
Execute in example, when the characteristic point of described iris image is processed or is transformed to iris image template by identification module,
A series of algorithm can be used to process, it is, for example possible to use Fourier transformation or wavelet transformation
Iris image processing is obtained iris image template.
In sum, by implementing the present invention, Distance-sensing equipment is utilized, by human eye to terminal device
The corresponding relation of distance and target intensity of illumination, as the transmitting light intensity of LED is adjusted so that intelligence
Expert's machine can obtain the iris image clearly of user automatically, quickly and easily, reduces user voluntarily
The trouble adjusted, and iris image acquisition process and discrimination process can be completed more quickly, improve
The Experience Degree of user；Additionally, this iris recognition and authentication techniques are also applied at smart machine by the present invention
Solution lock, provide the user a kind of brand-new unlocking manner, improve the Experience Degree of user.
Those skilled in the art of the present technique are appreciated that the present invention includes relating to performing described herein
One or more equipment in operation.These equipment can be required purpose and specialized designs and manufacture,
Or the known device in all-purpose computer can also be included.These equipment have storage calculating within it
Machine program, these computer programs optionally activate or reconstruct.Such computer program can be deposited
Store up in equipment (such as, computer) computer-readable recording medium or be stored in and be suitable to store e-command difference
Being coupled in any kind of medium of bus, described computer-readable medium includes but not limited to any class
The dish (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk) of type, ROM (Read-Only Memory,
Read-only storage), RAM (Random Access Memory, memory immediately), EPROM (Erasable
Programmable Read-Only Memory, Erarable Programmable Read only Memory), EEPROM
(Electrically Erasable Programmable Read-Only Memory, electric erazable programmable
Read-only storage), flash memory, magnetic card or light card.It is, computer-readable recording medium includes by equipment
(such as, computer) is with the form storage that can read or any medium of transmission information.
Those skilled in the art of the present technique are appreciated that and can realize these structures with computer program instructions
In each frame in figure and/or block diagram and/or flow graph and these structure charts and/or block diagram and/or flow graph
The combination of frame.Those skilled in the art of the present technique are appreciated that can be provided these computer program instructions
Realize to the processor of all-purpose computer, special purpose computer or other programmable data processing methods, from
And perform structure disclosed by the invention by the processor of computer or other programmable data processing methods
The scheme specified in figure and/or block diagram and/or the frame of flow graph or multiple frame.
Those skilled in the art of the present technique be appreciated that the present invention had discussed various operations, method,
Step in flow process, measure, scheme can be replaced, changed, combined or deleted.Further, tool
There are the various operations discussed in the present invention, method, other steps in flow process, measure, scheme
Can also be replaced, changed, reset, decomposed, combined or deleted.Further, of the prior art
Have with the step in the various operations disclosed in the present invention, method, flow process, measure, scheme can also
Replaced, changed, reset, decomposed, combined or deleted.
The above is only the some embodiments of the present invention, it is noted that general for the art
For logical technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvement and profit
Decorations, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a method for collecting iris, it is characterised in that comprise the following steps:
In response to the startup event of iris image unit, by range sensor obtain subject away from
From；
Determine that this is apart from corresponding target intensity of illumination；
The event of described target intensity of illumination it is adjusted to, by described iris image unit in response to infrared light
Gather the iris image of subject.
Method the most according to claim 1, it is characterised in that described determine that this is apart from corresponding
The step of target intensity of illumination, including:
According to the corresponding conversion rule between described distance and the described target intensity of illumination preset, determine this
Apart from corresponding target intensity of illumination.
Method the most according to claim 1, it is characterised in that described determine that this is apart from corresponding
After the step of target intensity of illumination, further comprise the steps of:
Determine that the light modulation corresponding to described target intensity of illumination drives signal；
Input this light modulation and drive signal, to adjust described infrared light to described target intensity of illumination.
Method the most according to claim 3, it is characterised in that: described light modulation drives signal to be pulsewidth
Modulating wave.
Method the most according to claim 1, it is characterised in that gather quilt by iris image unit
After the step of the iris image of reference object, further comprise the steps of:
The subscriber identity information being characterized described iris image differentiates.
Method the most according to claim 5, it is characterised in that described iris image is characterized
Subscriber identity information carries out, in the step differentiated, also including:
Characteristic point is extracted from the iris image gathered；
The characteristic point of extraction is compared, according to comparative result to iris with the iris templates information prestored
The subscriber identity information that image is characterized differentiates.
Method the most according to claim 6, it is characterised in that described from the iris image gathered
The step extracting characteristic point includes: by splitting the iris image of described collection, extract wherein
Characteristic point.
Method the most according to claim 6, it is characterised in that described according to comparative result to iris
The subscriber identity information that image is characterized carries out in the step differentiated, including:
When the characteristic point extracted is with the iris templates information match prestored, determine the identity of described user
Legal.
Method the most according to claim 8, it is characterised in that the described identity determining described user
After legal step, further comprise the steps of: the solution latching operation performed the machine.
10. an iris capturing terminal, it is characterised in that include with lower module:
Acquisition module, for the startup event in response to iris image unit, is obtained by range sensor
The distance of subject；
Determine module, for determining that this is apart from corresponding target intensity of illumination；
Perform module, for being adjusted to the event of described target intensity of illumination in response to infrared light, by institute
State iris image unit and gather the iris image of subject.
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| CN201610341592.2A CN105893988A (en) | 2016-05-20 | 2016-05-20 | Iris acquisition method and terminal thereof |
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| CN107463884A (en) * | 2017-07-18 | 2017-12-12 | 山西天地科技有限公司 | Iris identification method and device |
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| WO2019006707A1 (en) * | 2017-07-05 | 2019-01-10 | 广东欧珀移动通信有限公司 | Iris collection method, electronic device, and computer readable storage medium |
| WO2019061013A1 (en) * | 2017-09-26 | 2019-04-04 | 深圳传音通讯有限公司 | Function enabling method, terminal and computer-readable medium |
| WO2019071490A1 (en) * | 2017-10-11 | 2019-04-18 | 深圳传音通讯有限公司 | Iris recognition unlocking method and system based on intelligent terminal |
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Application publication date: 20160824 |