CN206489590U - A kind of iris identification device of dynamic human eye tracking - Google Patents
A kind of iris identification device of dynamic human eye tracking Download PDFInfo
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- CN206489590U CN206489590U CN201720194403.3U CN201720194403U CN206489590U CN 206489590 U CN206489590 U CN 206489590U CN 201720194403 U CN201720194403 U CN 201720194403U CN 206489590 U CN206489590 U CN 206489590U
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- iris
- human eye
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- dynamic human
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Abstract
The utility model embodiment provides the iris identification device that a kind of dynamic human eye is tracked, and the device includes processor, iris image sensor, iris-encoding identification module, range unit, carriage, tumbler, objective table and multiple images harvester.Iris image sensor is arranged at tumbler and rotated with the rotation with tumbler.Iris image sensor, iris-encoding identification module and tumbler are installed on objective table, and objective table is arranged at carriage and moved with the movement with carriage.The device by tumbler and carriage it is active adjust iris image sensor to track eyes of user.The problem of height is adaptive is solved, and solves conventional iris identifying device and requires the problem of eyes are moved to the iris recognition pickup area specified by user, the ease for use of iris identification device is improved, enhances Consumer's Experience sense.
Description
Technical field
The utility model is related to field of biological recognition, is filled in particular to the iris recognition that a kind of dynamic human eye is tracked
Put.
Background technology
With the development of biological identification technology, the tional identification device of such as ID/IC cards is gradually replaced by biological identification device,
Such as fingerprint identification device, face identification device and iris identification device.Wherein, iris identification device is obtained because of its high security
To greatly developing and apply.In the prior art, the video camera array constituted using multiple video cameras carries out IMAQ, works as shooting
During machine negligible amounts, it is difficult to meet the requirement of different user height.If number of cameras is more, the computing of computer can be increased
Amount, causes identification time delay longer.And this acquisition mode also needs to user and human eye actively is directed at into one of video camera, if
Standby not intelligent enough, ease for use is bad.In addition, also using elevating lever in the prior art come adjusting apparatus height to adapt to difference
The requirement of height user, but the motion amplitude of this adjustment mode is larger, and time delay is longer, easily causes iris camera shake, leads
Cause iris image unintelligible.
Utility model content
In view of this, the purpose of this utility model is iris identification device and the side for providing a kind of dynamic human eye tracking
Method, to solve the above problems.
The utility model preferred embodiment provides a kind of iris identification device of dynamic human eye tracking, including processor, rainbow
Film image sensor, iris-encoding identification module, range unit, carriage, tumbler, objective table and multiple images are adopted
Acquisition means；
The iris image sensor, iris-encoding identification module, range unit, carriage, tumbler and many
Individual image collecting device is electrically connected with the processor respectively, and the iris image sensor recognizes mould with the iris-encoding
Group is electrically connected with；
The iris image sensor is arranged at the tumbler and rotated with the rotation with the tumbler, described
Iris image sensor, iris-encoding identification module and tumbler are installed on the objective table, and the objective table is set
Moved in the carriage with the movement with the carriage.
Further, the tumbler is head, and the head is electrically connected with the processor, with according to the place
The control instruction of reason device rotates to drive the iris image sensor to rotate in vertical direction in vertical direction.
Further, the carriage includes the slide rail and sliding block cooperated, and the sliding block connects with the objective table
Connect to drive the objective table to move on the slide rail.
Further, the iris identification device of the dynamic human eye tracking also includes being electrically connected with the processor, used
In sending voice messaging according to the control command of the processor with point out user move sound-producing device.
Further, the iris identification device of the dynamic human eye tracking also includes multiple light-emitting devices, multiple hairs
Electro-optical device is respectively arranged at the both sides of the iris image sensor.
Further, the light-emitting device is near-infrared lamp.
Further, the iris identification device of dynamic human eye tracking also includes display device, the display device with
The processor is electrically connected with to show image information that the processor is received.
Further, the range unit is binocular stereo vision range unit, the binocular stereo vision range unit
It is made up of two described image harvesters.
Further, the range unit is that infrared distance measuring device, sound ranging device, laser ranging system or radar are surveyed
Away from device.
Further, described image harvester is wide visual field camera.
A kind of iris identification device for dynamic human eye tracking that the utility model is provided, the iris of dynamic human eye tracking is known
Other device can realize the dynamic tracking to user's human eye by tumbler and carriage, and iris image biography is adjusted actively
Sensor is to track eyes of user.The problem of height is adaptive is not only solved, and solves the requirement of conventional iris identifying device
The problem of eyes are moved to the iris recognition pickup area specified by user, improves ease for use, the enhancing of iris identification device
Consumer's Experience sense.And sensed by the rotation in vertical direction and the move mode in horizontal direction with adjusting iris image
The angle of device and position, improve the stationarity in iris image sensor moving process, have ensured the iris image collected
Definition.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Coordinate appended accompanying drawing, be described in detail below.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, it will use below required in embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
The structured flowchart of the iris identification device for the dynamic human eye tracking that Fig. 1 provides for the utility model preferred embodiment.
The structure chart of the iris identification device for the dynamic human eye tracking that Fig. 2 provides for the utility model preferred embodiment.
Iris image sensor and the relation schematic diagram of position of human eye that Fig. 3 provides for the utility model preferred embodiment.
Another structure of the iris identification device for the dynamic human eye tracking that Fig. 4 provides for the utility model preferred embodiment
Block diagram.
Iris image sensor and the pass at another visual angle of position of human eye that Fig. 5 provides for the utility model preferred embodiment
It is schematic diagram.
Icon：The iris identification device of 10- dynamic human eyes tracking；110- processors；120- iris image sensors；130-
Iris-encoding recognizes module；140- range units；150- carriages；160- tumblers；170- image collecting devices；180-
Objective table；190- sound-producing devices；200- display devices；210- light-emitting devices.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole realities
Apply example.The component for the utility model embodiment being generally described and illustrated herein in the accompanying drawings can be come with a variety of configurations
Arrangement and design.Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit
Claimed scope of the present utility model, but it is merely representative of selected embodiment of the present utility model.Based on the utility model
Embodiment, the every other embodiment that those skilled in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.Meanwhile, it is new in this practicality
In the description of type, unless otherwise clearly defined and limited, term " installation ", " setting ", " connection " should be interpreted broadly, example
Such as, can be fixedly connected or be detachably connected, or be integrally connected；Can mechanically connect or be electrically connected
Connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be the connection of two element internals.For this
For the those of ordinary skill in field, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
Referring to Fig. 1, the structure of the iris identification device 10 of the dynamic human eye tracking provided for the utility model embodiment
Block diagram.As shown in figure 1, the iris identification device 10 of the dynamic human eye tracking includes processor 110, iris image sensor
120th, iris-encoding identification module 130, range unit 140, carriage 150, tumbler 160 and multiple images harvester
170.The iris image sensor 120, iris-encoding identification module 130, range unit 140, carriage 150, rotation dress
Put 160 and multiple images harvester 170 be electrically connected with respectively with the processor 110, the iris image sensor 120
It is electrically connected with iris-encoding identification module 130.
Fig. 2 is please referred to, the iris identification device 10 of the dynamic human eye tracking also includes objective table 180.The rainbow
Film image sensor 120 is arranged at the tumbler 160, can with the tumbler 160 rotation in vertical direction
Turn an angle.The iris image sensor 120, iris-encoding identification module 130 and tumbler 160 are installed on institute
Objective table 180 is stated, the objective table 180 is arranged at the carriage 150.The iris image sensor 120, iris-encoding
Identification module 130, tumbler 160 and objective table 180 can in the horizontal direction be moved up with the movement of the carriage 150
Dynamic certain distance.
Alternatively, in the present embodiment, described image harvester 170 can be multiple, multiple described image collection dresses
170 bottoms of iris identification device 10 for being arranged on the dynamic human eye tracking are put, the rainbow for gathering the dynamic human eye tracking
The image information in the front of film identifying device 10.Alternatively, in the present embodiment, described image harvester 170 can regard for width
Field camera, to cover larger image acquisition region.Multiple wide visual field cameras can be disposed in an evenly spaced relation in the dynamic human eye
The bottom of the iris identification device 10 of tracking, it is wide to regard when the iris identification device 10 that user tracks close to the dynamic human eye
Field camera gathers the image information in the front of iris identification device 10 of the dynamic human eye tracking in real time.In the specific implementation, adopt
With multiple wide visual field cameras while shooting image, user images information can be photographed in a wider context.Wide visual field camera exists
Gather after user images information, the image information collected is sent to the processor 110 to be handled.
Alternatively, the processor 110 can carry out face inspection after the image information of wide visual field camera transmission is received
Survey.Face information is detected the presence of according to the image information photographed first, if detecting facial image, face face is extracted
Image information.The processor 110 carries out human eye detection according to the face facial image information of acquisition and positioned, and obtains user's
Position of human eye information.
Alternatively, the range unit 140 is electrically connected with the processor 110, is passed for measuring the iris image
The distance between sensor 120 and the position of human eye.Alternatively, in the present embodiment, the range unit 140 is binocular solid
Visual token device.The binocular stereo vision range unit is made up of two wide visual field cameras.Described two wide visual field cameras
It is separately positioned on the front lower position of the iris identification device 10 of the dynamic human eye tracking.Using two wide visual field cameras from
Two viewpoints are obtained in different visual angles with gathering the Same Scene in the front of the iris identification device 10 of the dynamic human eye tracking
Under one group of image, then the parallax by Same Scene in different images, to calculate the target object in scene, that is, is used
Family human eye, spatial geometric shape and position.The position of human eye is obtained according to the distance calculated to pass to the iris image
Sensor 120 apart from D, as shown in Figure 3.
Binocular stereo vision ranging is that, according to visual theory, the problem of three dimensions is asked into depth information is converted into two-dimentional sky
Between seek parallax, without signal emitting-source, only need to by the com-parison and analysis of visual signal come mensuration distance, with it is easy to use, survey
Away from while can obtain the advantages such as substantial amounts of scene information.
Alternatively, in the present embodiment, the range unit 140 can also use infrared distance measuring device.The infrared distance measurement
Device includes infrared transmitter and position detecting device (not shown).The infrared transmitter and the position detecting device
It is separately positioned on the both sides of the iris image sensor 120.The infrared transmitter and the position detecting device respectively with
The processor 110 is electrically connected with.In the specific implementation, the infrared transmitter sends infrared beam, after barrier is run into,
Infrared beam is reflected by barrier, and reflected light is received by the position detecting device.Can be according to the barrier, infrared
The distance between transmitter and the angle and the infrared transmitter and the position detecting device of position detecting device formation
Calculate the distance between the barrier and described infrared distance measuring device.The position of human eye is obtained according to the distance calculated
To the iris image sensor 120 apart from D.
Alternatively, in the present embodiment, the range unit 140 can be sound ranging device, the sound ranging device
Distance between the two can be calculated according to transmission signal and the time interval run between the response signal after barrier.Except
Outside above-mentioned different types of range unit, the range unit 140 can also use laser ranging system, radar range unit
Deng in the present embodiment, being not specifically limited.
Referring to Fig. 4, alternatively, in the present embodiment, the iris identification device 10 of the dynamic human eye tracking also includes
Sound-producing device 190.The sound-producing device 190 is electrically connected with the processor 110.Because Algorithm of Iris Recognition is to pending
Iris image there are certain requirements, it is therefore desirable to limit the distance between user's position of human eye and described iris image sensor 120.
The processor 110 is contrasted the distance that the result that the range unit 140 measurement is obtained is required with Algorithm of Iris Recognition.
According to comparing result to the sound-producing device 190 send control command with control the sound-producing device 190 send voice messaging with
Prompting user is moved forward or rearward, and can for example send " user's forward movement ", " user is moved rearwards by " " please either keep not
It is dynamic " etc. voice messaging to point out user to carry out corresponding actions, after user stands firm again, then regain the image for meeting and requiring
Information.
Alternatively, in the present embodiment, also can using can auto-focusing iris camera come obtain meet require iris
Image information.
Alternatively, in the present embodiment, the iris identification device 10 of the dynamic human eye tracking also includes display device
200, the display device 200 is electrically connected with the processor 110.The display device 200 is arranged on the dynamic human eye
The preceding surface of the iris identification device 10 of tracking.The image that the processor 110 photographs the wide visual field camera received is believed
Breath is sent to the display device 200.The effect of shooting can be checked according to the image information user that the display device 200 is shown
Really, such as body whether in whether the centre position of image, image are clear, and adjusted accordingly according to the effect of shooting
It is whole so that the wide visual field camera obtains the image information of better quality.
It is alternatively, in the present embodiment, described dynamic according to high reflectance of the iris near infrared light referring to Fig. 2
The iris identification device 10 of state tracing of human eye also includes multiple light-emitting devices 210, and multiple light-emitting devices 210 are separately positioned on
The both sides of the iris image sensor 120.Alternatively, in the present embodiment, the light-emitting device 210 can be near-infrared lamp.
The number of the light-emitting device 210 can be 4 or 6, and its concrete numerical value can be set according to real needs, in the present embodiment
It is not specifically limited.When it is implemented, when the iris identification device 10 of the dynamic human eye tracking is opened, the light-emitting device
210 open there is provided light source in order to which the iris identification device 10 that the dynamic human eye is tracked can collect clearly iris
Image, is that iris recognition is prepared.
After said process, position of human eye information of the processor 110 according to acquisition, the iris image sensor
120 arrive the parameter of the distance between position of human eye D and wide visual field camera, are calculated and are obtained in the horizontal direction according to formula (1)
The iris image sensor 120 need movement calculate the rainbow in vertical direction apart from L, and according to formula (2)
Film image sensor 120 needs the angle, θ rotated, in order to which the iris image sensor 120 can be right against the people of user
Eye, to gather the iris image of user, please refers to Fig. 3 and Fig. 5.
Wherein, l0For image collecting device 170CMOS to the distance of the convex lens photocentre of image collecting device 170, pxFor human eye
The upward pixel sequence number of reclaimed water square, p are imaged to image collecting device 170oFor the water of the optical centre of image collecting device 170
Square upwards pixel sequence number, WCMOSFor the width of image collecting device 170CMOS target surfaces, WpFor the level of image collecting device 170
Imageable pixel summation on direction, D is that iris image sensor 120 arrives the distance between position of human eye, and Δ D is iris figure
The horizontal range arrived as sensor 120 between image collecting device 170.
Wherein, l0For image collecting device 170CMOS to the distance of the convex lens photocentre of image collecting device 170, pyFor human eye
Pixel sequence number in being imaged to image collecting device 170 in vertical direction, poFor hanging down for the optical centre of image collecting device 170
The upward pixel sequence number of Nogata, HCMOSFor the height of image collecting device 170CMOS target surfaces, HpIt is vertical for image collecting device 170
Imageable pixel summation on direction, D is that iris image sensor 120 arrives the distance between position of human eye, and Δ h is iris figure
As the photocentre of sensor 120 to the vertical range between the photocentre of image collecting device 170.
The processor 110 needs the angle, θ rotated to control the tumbler according to the iris image sensor 120
160 rotate, to drive the iris image sensor 120 to rotate corresponding angle.Alternatively, in the present embodiment, described turn
Dynamic device 160 is head, and the iris image sensor 120 is arranged on the head, you can with by rotating the head
To drive the iris image sensor 120 to be rotated in vertical direction.Include motor inside the head, it is main to be responsible for described
The rotation of head in the vertical direction.After the control instruction that the processor 110 is sent is received, motor is rotated, through slowing down
Case drives vertical-transmission wheel disc to rotate.Alternatively, the head also includes limited bolt, and spacing work(can be realized by microswitch
Energy.When the rotational angle of the cloud platform rotation reaches limited bolt set in advance, the microswitch is action to cut off electricity
Source, the head is to stop operating.
Usually, head can be divided into exchange head and direct current head.Exchange head uses alternating current generator, velocity of rotation
More fix, its general vertical velocity of rotation is 3 °/s-6 °/s.Direct current head mostly uses DC stepper motor, has
The advantages of rotating speed height, variable-ratio.Direct current head is very suitable for needing the rotating speed in the quick occasion for catching target, its vertical direction
Up to 10 °/s-24 °/s.In addition, direct current head also has speed changing function, gentle speed change transition can be achieved.
Alternatively, the processor 110 needs mobile distance in the horizontal direction according to the iris image sensor 120
L controls the carriage 150 to move.Alternatively, the carriage 150 includes the sliding block and slide rail cooperated.It is described
Iris image sensor 120, iris-encoding identification module 130, head and objective table 180 are arranged on the sliding block.Institute
State processor 110 according to the iris image sensor 120 calculated need in the horizontal direction movement send control apart from L
Information controls the sliding block to be moved on the slide rail, to drive the iris image sensor 120 to move in the horizontal direction
Accordingly apart from L.It is after position of the iris image sensor 120 on vertical angle and horizontal direction has been adjusted, i.e., complete
Into the tracking to user's human eye.
After user's tracing of human eye is completed, the iris image sensor 120 have found optimal iris image acquiring
Position, then can carry out the iris image information collection of user.Alternatively, the iris image sensor 120 may include that CMOS schemes
As sensor, when carrying out iris image acquiring, cmos image sensor is acquired corresponding to whole eyes region, and also
The various processing to iris image can be achieved, for example pretreatment, picture quality screening and feature extraction etc..The iris figure
Module 130 is recognized to carry out iris recognition as the iris image collected is sent to the iris-encoding by sensor 120.
The iris-encoding identification module 130 receives the iris image information that the iris image sensor 120 is sent
Afterwards, feature coding feature extraction obtained is matched one by one with the iris image feature coding in database, to judge to adopt
Whether the iris image collected is identical iris with the iris image in database, is identified with the identity to user.It is optional
Ground, in the present embodiment, if the authentication success of user, the sound-producing device 190 can then send the prompting of " being verified "
Voice, otherwise sends the voice message of " authentication failed ".
In summary, the utility model provides a kind of iris identification device 10 of dynamic human eye tracking, the dynamic human eye with
The iris identification device 10 of track by tumbler 160 and carriage 150 it is active adjust iris image sensor 120 with
Realize and the dynamic of user's human eye is tracked.The problem of height is adaptive is not only solved, and solves conventional iris identification dress
Put and require the problem of eyes are moved to the iris recognition pickup area specified by user, the iris for improving dynamic human eye tracking is known
The ease for use of other device 10, enhance Consumer's Experience sense.And pass through the rotation in vertical direction and the movement in horizontal direction
Mode is improved flat in the moving process of iris image sensor 120 with adjusting angle and the position of iris image sensor 120
Stability, has ensured the definition of the iris image collected.
, it is necessary to explanation in description of the present utility model, the orientation or position relationship of the instruction such as term " on ", " under "
For based on orientation shown in the drawings or position relationship, or the orientation or position that the utility model product is usually put when using
Relation, is for only for ease of description the utility model and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.It should be noted that
Arrive：Similar label and letter represents similar terms in following accompanying drawing, therefore, once determined in a certain Xiang Yi accompanying drawing
Justice, then further need not be defined and be explained to it in subsequent accompanying drawing.
Claims (10)
1. a kind of iris identification device of dynamic human eye tracking, it is characterised in that including processor, iris image sensor, rainbow
Film code identification module, range unit, carriage, tumbler, objective table and multiple images harvester；
The iris image sensor, iris-encoding identification module, range unit, carriage, tumbler and multiple figures
As harvester recognizes module electricity with processor electric connection, the iris image sensor and the iris-encoding respectively
Property connection；
The iris image sensor is arranged at the tumbler and rotated, the iris with the rotation with the tumbler
Imaging sensor, iris-encoding identification module and tumbler are installed on the objective table, and the objective table is arranged at institute
Carriage is stated to move with the movement with the carriage.
2. the iris identification device of dynamic human eye according to claim 1 tracking, it is characterised in that the tumbler is
Head, the head is electrically connected with the processor, to be rotated in vertical direction according to the control instruction of the processor
To drive the iris image sensor to rotate in vertical direction.
3. the iris identification device of dynamic human eye tracking according to claim 1, it is characterised in that the carriage bag
The slide rail and sliding block of mutual cooperation are included, the sliding block is connected to drive the objective table to move up in the slide rail with the objective table
It is dynamic.
4. the iris identification device of dynamic human eye according to claim 1 tracking, it is characterised in that the dynamic human eye with
The iris identification device of track also includes being electrically connected with, for sending language according to the control command of the processor with the processor
Message ceases to point out the sound-producing device that user moves.
5. the iris identification device of dynamic human eye according to claim 1 tracking, it is characterised in that the dynamic human eye with
The iris identification device of track also includes multiple light-emitting devices, and multiple light-emitting devices are respectively arranged at the iris image sensing
The both sides of device.
6. the iris identification device of dynamic human eye according to claim 5 tracking, it is characterised in that the light-emitting device is
Near-infrared lamp.
7. the iris identification device of dynamic human eye according to claim 1 tracking, it is characterised in that the dynamic human eye with
The iris identification device of track also includes display device, and the display device is electrically connected with to show the processing with the processor
The image information that device is received.
8. the iris identification device of dynamic human eye according to claim 1 tracking, it is characterised in that the range unit is
Binocular stereo vision range unit, the binocular stereo vision range unit is made up of two described image harvesters.
9. the iris identification device of dynamic human eye according to claim 1 tracking, it is characterised in that the range unit is
Infrared distance measuring device, sound ranging device, laser ranging system or radar range unit.
10. the iris identification device of dynamic human eye tracking according to claim 1, it is characterised in that described image is gathered
Device is wide visual field camera.
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| CN201720194403.3U CN206489590U (en) | 2017-03-01 | 2017-03-01 | A kind of iris identification device of dynamic human eye tracking |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319838A (en) * | 2018-04-18 | 2018-07-24 | 北京小米移动软件有限公司 | Screen lower fingerprint verifying apparatus, method, storage medium and mobile terminal |
| WO2018157827A1 (en) * | 2017-03-01 | 2018-09-07 | 武汉虹识技术有限公司 | Dynamic human eye-tracking iris capturing device, dynamic human eye-tracking iris identification device and method |
| CN113536825A (en) * | 2020-04-13 | 2021-10-22 | 上海聚虹光电科技有限公司 | Focusing algorithm for iris recognition in motion |
-
2017
- 2017-03-01 CN CN201720194403.3U patent/CN206489590U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018157827A1 (en) * | 2017-03-01 | 2018-09-07 | 武汉虹识技术有限公司 | Dynamic human eye-tracking iris capturing device, dynamic human eye-tracking iris identification device and method |
| CN108319838A (en) * | 2018-04-18 | 2018-07-24 | 北京小米移动软件有限公司 | Screen lower fingerprint verifying apparatus, method, storage medium and mobile terminal |
| CN108319838B (en) * | 2018-04-18 | 2020-06-02 | 北京小米移动软件有限公司 | Device and method for verifying fingerprint under screen, storage medium and mobile terminal |
| CN113536825A (en) * | 2020-04-13 | 2021-10-22 | 上海聚虹光电科技有限公司 | Focusing algorithm for iris recognition in motion |
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