CN106960173A - The system that safety goggles are disturbed in a kind of iris identification device - Google Patents
The system that safety goggles are disturbed in a kind of iris identification device Download PDFInfo
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- CN106960173A CN106960173A CN201610015626.9A CN201610015626A CN106960173A CN 106960173 A CN106960173 A CN 106960173A CN 201610015626 A CN201610015626 A CN 201610015626A CN 106960173 A CN106960173 A CN 106960173A
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- 210000001508 eye Anatomy 0.000 claims abstract description 33
- 239000011521 glass Substances 0.000 abstract description 24
- 238000003384 imaging method Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 10
- 230000001815 facial effect Effects 0.000 abstract description 9
- 238000005286 illumination Methods 0.000 abstract description 8
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- 238000010586 diagram Methods 0.000 description 8
- 230000000007 visual effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000013041 optical simulation Methods 0.000 description 5
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- 210000005252 bulbus oculi Anatomy 0.000 description 2
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- 210000000887 face Anatomy 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 210000003786 sclera Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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Abstract
The invention provides the system that safety goggles in a kind of iris identification device are disturbed, including the infrared iris light compensating lamp that camera lens, wavelength are 700~900nm, and when the anglec of rotation g of infrared iris light compensating lamp is met(wherein, 0≤θ≤3 °；Wherein, H is camera lens surface and the vertical range of face, L is the horizontal-shift distance of infrared iris light compensating lamp and illuminated eyes) when, the adverse effect to iris imaging that the hot spot of glasses reflection generation is caused can be prevented effectively from, the characteristics of having reached simultaneously to facial uniform illumination, the recognition effect and efficiency of iris identification device are improved, user experience is also improved.
Description
Technical field
The invention belongs to technical field of biometric identification, and in particular to safety goggles interference is in a kind of iris identification device
System.
Background technology
Iris recognition is a kind of biological identification technology based on human eye iris region minutia, because it has pinpoint accuracy
Increasingly paid close attention to uniqueness by information security field.
Since there is initially available iris authentication system from 1990s, iris identification device is quickly grown,
It is widely used in the fields such as finance, national defence, the administration of justice and daily life, and people are for the focus of iris identification device on the market
Also it is transferred to user experience requirement from function and performance indications requirement, it is desirable to which iris device identification distance is more and more remote, identification
Speed is more and more faster, and adaptation user scope is more and more wider, wherein needing user to take when most of iris identification device is experienced
The main cause of glasses be because eyeglass can to supplementary lighting sources launch light reflect, and reflection light collection into
As there are a large amount of hot spots to the iris region image in iris identification device, causing to obtain, these hot spots very likely block rainbow
Diaphragm area texture information so that can not obtain enough iris informations from the iris image of acquisition and be identified.
It is currently known face, iris test imaging device include band logical optical filter, cmos camera (containing optics into
As lens group, sensor), distance light axle pulsed light source, eye position tracking and positioning unit, wherein described eye position
Tracking is made up of with positioning unit wide-angle cmos camera with dipped beam axle lighting source.
Visible ray from peripheral environment, near-infrared supplementary lighting sources reflect at eyes, and reflected light enters optical light filter
Part, optical lightscreening device reflects visible ray and fed back for ocular vision, thing after transmission near infrared light to optical imaging lens group
Focal imaging is managed to cmos camera.But it is due to that the different angles of distance light axle pulsed light source cause in facial different zones
Illumination it is different, occur a part of face when serious dark, it is difficult to meet face and iris recognition requirement.
In order to solve the above problems, number of patent application is 201510053696.9 Chinese patent application, discloses one kind
The iris identification device of the reflective interference of safety goggles, it mainly passes through the distance at camera lens and glasses center, the curvature of eyeglass half
The angle of visual field of footpath and camera lens determines that the mode of the ranges of incidence angles of supplementary lighting sources realizes that the light after being reflected through eyeglass is incident
Iris imaging will not be adversely affected after in camera lens, to improve the experience property of recognition efficiency and user.Although, in application
It is claimed in file has a characteristic simple in construction, but the content disclosed in the formula and embodiment from its determination angle
In, it is seen that the parameter that it is related to is more, and is restricted by the parameter of eyeglass in itself, therefore, it is determined that the process of angle
It is middle to need to know more parameter, the radius of curvature of especially different eyeglass, and in the case of same eyeglass
It is still required for accepting or rejecting in two angles that two faces of selection eyeglass are produced, and chooses larger value, the radius of curvature of front-back
In similarly need to accept or reject, choose wherein numerical value less, it can be seen that, the parameter of its determination angle is not only more, and same
It is still required for choosing specific value in the case of one parameter, it is clear that cumbersome, and is easily reduced its accuracy and reliability.
The content of the invention
During iris recognition, the identification interference that glasses reflection and facial uneven illumination are brought
The problem of leading to not meet needs, even None- identified and prior art precision and poor reliability.
For up to above-mentioned purpose, the invention provides the system that safety goggles in a kind of iris identification device are disturbed, including camera lens,
Infrared iris light compensating lamp, the anglec of rotation g of the infrared iris light compensating lamp is met
Wherein, H is camera lens surface and the vertical range of face, and L is the horizontal-shift distance of infrared iris light compensating lamp and illuminated eyes,
θ is angle threshold value.
Wherein, the infrared iris light compensating lamp includes being located on the right side of the camera lens or upper right side for pulse alternating irradiation left eye
Or alternately irradiation right eye is located on the left of the camera lens or lower left side or upper left side for the right infrared iris light compensating lamp of lower right side, pulse
Left infrared iris light compensating lamp.
The alternating irradiation time interval t of the right infrared iris light compensating lamp and the left infrared iris light compensating lamp is：0<t≤
1.5s。
The wave-length coverage of the infrared iris light compensating lamp is：700~900nm.
The wave-length coverage of the infrared iris light compensating lamp is：760~850nm.
The wavelength of the infrared iris light compensating lamp is：810nm.
The value of the θ is 0≤θ≤3 °.
The beneficial effects of the invention are as follows：By using the infrared iris light compensating lamp of rotation to best angle, it is to avoid glasses
It is reflective and cause the influence to iris imaging in iris region, while the substantially uniform covering face of light source under the angle, reaches
The characteristics of facial uniform illumination, the recognition effect and efficiency of iris identification device are improved, also improve user experience.
Brief description of the drawings
Fig. 1 is the light path principle schematic diagram of iris identification device in face, the comprehensive identifying device of iris.
Fig. 2 is the iris imaging device optical beam path figure of the specific embodiment of the invention 1.
Fig. 3 a are the iris imaging device optical simulation illustraton of model of the specific embodiment of the invention 1.
Fig. 3 b are that the iris imaging device of the specific embodiment of the invention 1 naked regards lower as optical simulation result schematic diagram one.
Fig. 3 c are that the iris imaging device of the specific embodiment of the invention 1 naked regards lower as optical simulation result schematic diagram two.
Fig. 4 a for the specific embodiment of the invention 1 iris imaging device wear glasses in the case of simulation result schematic diagram
One.
Fig. 4 b be the specific embodiment of the invention 1 iris imaging device wear glasses in the case of simulation result schematic diagram
Two.
Fig. 5 a be the specific embodiment of the invention 1 iris imaging device it is naked optionally under measured drawing.
Fig. 5 b be the specific embodiment of the invention 1 iris imaging device wear glasses in the case of measured drawing.
Fig. 6 is the iris imaging device optical beam path figure of the specific embodiment of the invention 2.
Fig. 7 a for the specific embodiment of the invention 2 iris imaging device wear glasses in the case of optical simulation illustraton of model.
Fig. 7 b be the specific embodiment of the invention 2 iris imaging device wear glasses in the case of simulation result schematic diagram.
Fig. 8 a be the specific embodiment of the invention 2 iris imaging device it is naked optionally under measured drawing.
Fig. 8 b be the specific embodiment of the invention 2 iris imaging device wear glasses in the case of measured drawing.
Description of reference numerals：1st, 3, infrared face light compensating lamp；2nd, right infrared iris light compensating lamp；4th, left infrared iris light filling
Lamp；5,5a, 5b, range-measurement infrared system；6a, 6b, 6c, 6d are system indicator；7th, infrared iris camera system；8th, infrared face
Camera system；9th, visible ray face camera system；10a10b, 10c, 10d, 10e, infrared filtering device；11st, 12, human eye；13、
Glasses.
Embodiment
Fig. 1 is a device comprehensively recognized containing face, iris, and wherein the light path schematic diagram of iris identification device is as schemed
Show.It can be seen that the iris identification device includes infrared face light compensating lamp 1 and 3 of the wave band in 700~900nm, its correspondence
The wide-angle angle of visual field (generally at 90 ° or so), is mainly used in face test and recognizes；
Wave band is right infrared iris light compensating lamp 2 and left infrared iris light compensating lamp in 700~900nm infrared iris light compensating lamp
4, its correspondence low-angle angle of visual field is mainly used in iris test and identification, its best identified wavelength is in 810nm；
Range-measurement infrared system 5a, 5b, are mainly used in determining eye position and assignment test, identification distance；
System indicator 6a, 6b, 6c, 6d, are mainly used in identification, the instruction of test mode；
Infrared iris camera system 7, infrared face camera system 8, visible ray face camera system 9, infrared filtering device
10a, 10b, 10c, 10d, 10e, human eye 11 and 12,13, glasses.Because visible ray is sufficient in environment, therefore visible image capturing system 9
Do not use light compensating lamp.
H shown in Fig. 11And H2It is the different vertical ranges on different identification distances, i.e. camera lens surface and face.
The anglec of rotation of wherein infrared iris light compensating lamp is relevant with identification distance and two positions, infrared iris light compensating lamp
Anglec of rotation g is met：Central angle angle value isWherein, H is
Camera lens surface and the vertical range of face, L are the horizontal parallel offset distance of infrared iris light compensating lamp and irradiation eyes, angle door
Limit value θ determines according to practical application request, 0≤θ≤3 ° preferably.
The infrared light of infrared light compensating lamp transmitting reaches different camera lenses after reflecting (containing glasses reflection) through human face, through mirror
Corresponding sensor is reached after the convergence of head lens group, so as to complete the process of imaging.Because infrared face light compensating lamp is luminous
Angle is larger, the problem of will not causing image illumination uneven with glasses hot spot, therefore the angle of primary study iris light compensating lamp is asked
Topic.
Using two infrared iris light filling it is right infrared iris light compensating lamp 2, the left infrared lamp pulse of iris light compensating lamp 4 in design
Formula is alternately illuminated, i.e. left side lamp (i.e. positioned at camera lens left side or lower left or upper left left infrared iris light compensating lamp 4) irradiation is right
Branch hole eyeball, starboard light (i.e. positioned at the right infrared iris light compensating lamp 2 on camera lens right side or lower right or upper right side) irradiation left side eyes,
Alt time be 0~1.5 second (optimal value is 0.5~1.0s of scope, alt time t length according to identification where target away from
Can occur iris recognition program triggering target authentication from, identification range, once iris recognition program triggers target authentication, data
Storehouse will carry out a series of activities such as the extraction, comparison, processing of data, and this series of activities is needed in the case where target is different
The time wanted is also different, understands that its optimum valuing range is 0.5~1.0s according to bulk data test statisticses, and optimal value
Point is 0.5s), because the infrared iris light compensating lamp angle of visual field is narrow, subregion can only be irradiated, current iris recognition apart from H about
It is S=Htan θ that can calculate spot radius size according to angle of visual field θ for 20cm~45cm, and wherein H is camera lens surface and face
Vertical range, S is spot radius, therefore can ensure that facial illuminance is uniform when requiring S >=62mm (face mean radius).
Understood with reference to Tracepro softwares, hot spot displacement and the relation of light source deviation angle under different identification distances
As shown in table 1.
The relation of the light source deviation angle of table 1 and hot spot displacement
Human eye can approximately regard an oval structure as from outside, its major axis and short axle size is about 30mm and 12mm (only refers to pupil
Hole, iris, sclera region), the diameter of wherein iris region is about 11mm.Difference identification distance correspondence is big in the hot spot of face
It is small to differ, according to the depth of field value of iris lens, it may be determined that the interval range of identification distance, now need according to user's request and practical field
Close and determine best identified distance.It can be seen from table 1, optimized migration angle, θ value can be deduced after determining best identified distance.With eye
Ball size is contrasted, and when this deviation angle θ is less than or equal to 3 °, hot spot displacement is respectively less than eyes major axis size 30mm, i.e., not
It can ensure hot spot moving range in ocular vicinity during with identification distance (20cm~45cm).Now, it is radiated at ocular vicinity
Illuminance is relatively strong, and utilization ratio of optical energy is high.I.e. when the light source anglec of rotation
When 0≤θ≤3 °, illuminance is compared relatively by force, and utilization ratio of optical energy is high, now spot size S >=62mm, and facial illuminance is equal
It is even.
Relation between light source deviation angle and hot spot displacement is understood according to table 1, it is however generally that, iris is known at this stage
Other distance is about in 20~45mm, wherein according to human visual experience, best identified distance is general in 30~35cm.Most preferably knowing
In other distance range, when light source deviation angle θ=3 °, peak excursion distance is 18.34mm.Now, if originating light source position
In eye center region, light source is located near canthus through 3 ° of rotations, light source center, and waste and the glasses of light energy are not easily caused
It is reflective, while not influenceing the identification of iris region.
The system disturbed with reference to embodiment safety goggles in iris identification device is described in further details
Embodiment one：
As shown in Fig. 2 the angle of visual field of infrared iris light compensating lamp (hereinafter referred to as iris light compensating lamp) is ± 10 °, iris light filling
Lamp is that the spacing of right iris light compensating lamp 2 and left iris light compensating lamp 4 is 93.157mm, left iris light compensating lamp 4 and iris camera system 7
Spacing be 29.081mm, H is 350mm, and the spacing of two human eyes 11,12 is 58.33mm, the length of two human eyes 11 and 12 and
Width is 30mm and 12mm, and left iris light compensating lamp 4 has 8.089mm difference in height with iris camera system 7.
Fig. 2 is the optical beam path figure of the specific embodiment of the invention 1, specifically opens the left irradiation of iris light compensating lamp 4 right side
The optical beam path figure of the situation of glasses 13.
Due to the symmetrical placement of infrared light supply be left iris light compensating lamp 4 and right iris light compensating lamp 2 it is symmetrical place, because
The situation on this analysis one side.
Identification distance is H=350mm, the horizontal relative position L=of iris light compensating lamp 4 and right side glasses 11 in Fig. 2
74.39mm, according to infrared iris light compensating lamp anglec of rotation formulaIt is preferred that 0≤θ
≤3°；The span for understanding g is 9 °≤g≤15 °, wherein central angle angle value gMFor 12 °.In addition, it can be seen from index path, this
When dull thread enter iris lens.
Set up in threedimensional model, brought into optical simulation software Tracepro and emulated such as Fig. 3 a institutes in Soldworks
Show.According to continuous simulation comparison, show that optimal emulation angle is 12 °.Fig. 3 b, Fig. 3 c are the naked optical simulation knot in the case of lower
Really.
According to simulation result, by Fig. 3 c combination simulation models 3a, it is known that right side eye center is long generally within (- 30,65)
Degree and width are respectively 30mm and 12mm, now light source irradiation center deviation iris central area 8.089mm, because infrared
There is 8.089mm difference in height with iris camera system in iris light compensating lamp.
The angle of visual field of iris light compensating lamp is ± 10 °, therefore when identification distance is 350mm, according to hot spot computing formula S=
Htan θ are understood：S=62mm, can be completely covered face area.
From Fig. 3 c as can be seen that hot spot can whole face of uniform fold, more light are inclined to left side faces, light source center it is big
Body position is (- 23,58.5), and size is about in 3*7mm, i.e. facula position, as shown in circle in figure.
Fig. 4 b are the illumination figure that infrared light supply is that infrared iris light compensating lamp is radiated on glasses, it can be seen that, illumination compares
Four positions that strong several hot spots are located at shown in Fig. 4 b respectively are the position that circle is irised out, position light wherein shown in Fig. 4 a
Illumination is most strong, i.e. facula position.As seen from the figure, spot area does not influence the identification of iris portion away from eye areas.
As can be seen here, when the anglec of rotation g of infrared iris light compensating lamp is met：
(central angle angle value isH is camera lens surface and the vertical range of face, and L is infrared iris light compensating lamp and irradiation
The horizontal parallel offset distance of eyes, 0≤θ≤3 ° preferably), it is possible to prevente effectively from the hot spot that glasses reflection is produced is known to iris
The interference of the information in other device collection iris region, meanwhile, can at spot radius S >=62mm (face mean radius)
Ensure that facial illuminance is uniform.
Measured drawing such as Fig. 5 a, Fig. 5 b are for details, reference can be made to, it can be seen that, iris information is clear, and recognition effect is excellent.
Embodiment two：
Infrared iris light compensating lamp 2 and 4 (i.e. right iris light compensating lamp 2 and left iris light compensating lamp 4) spacing is 168mm, right infrared
Iris light compensating lamp 2 is 77.64mm with the spacing of iris camera system 7, and H is 350mm, iris light compensating lamp 2 and left side eyes 12
Horizontal relative position L is 113.72mm, and the spacing of two human eyes 11 and 12 is 58.33mm, the length of two human eyes 11 and 12 and
Width is 30mm and 12mm, according to according to infrared iris light compensating lamp anglec of rotation formula
It is preferred that 0≤θ≤3 °；The span that g can be tried to achieve is 15≤g≤21 °, wherein central angle angle value gMFor 18 °.
With reference to the reflection theorem of light, index path is done.When g is in the range of 15~21 ° as shown in Figure 6, dull thread enters rainbow
Film camera lens.Optical modeling is carried out using three-dimensional software, addition light source brought into optical simulation software carries out emulation simulation model as schemed
7a, simulation result is as follows：
According to continuous simulation comparison, show that optimal emulation angle is 19 °.Left side eye center base is understood with reference to simulation model
This is located at (30,65) shown in Fig. 7 b, and length and width is respectively 30mm and 12mm, and Fig. 7 b are the specific embodiment of the invention 2
Simulation result schematic diagram one in the case of wearing glasses.Knowable to from Fig. 7 b, the illuminance of eye areas has two than more uniform
Speck, its center is about (18,67), (41,64), and spot size is about 2mm, its position outside eye areas, because
This does not influence the identification of iris.
Specific measured drawing such as Fig. 8 (a), shown in 8 (b), iris information is clear, and recognition effect is excellent.
To sum up, when the anglec of rotation g of infrared iris light compensating lamp is met：When,
(central angle angle value isH is camera lens surface and the vertical range of face, and L is infrared iris light compensating lamp and irradiation
The horizontal parallel offset distance of eyes, 0≤θ≤3 ° preferably), it is possible to prevente effectively from the hot spot that glasses reflection is produced is known to iris
The interference of the information in other device collection iris region, meanwhile, can at spot radius S >=62mm (face mean radius)
Ensure that facial illuminance is uniform.
And when being particularly applicable in iris identification equipment, then be by pulse alternately irradiation left eye be located at camera lens on the right side of or
The right infrared iris light compensating lamp in lower right or upper right side, pulse alternately irradiate being located on the left of camera lens or lower left or upper left for right eye
The left infrared iris light compensating lamp of side, with time interval t：0<T≤1.5s, wherein optimal spacing are 0.5~1.0s, during for interval
It is long, realize and the pulsed of two human eyes is alternately irradiated, it can be ensured that the hot spot that glasses reflection is produced has away from iris recognition region
Effect avoids the hot spot that glasses reflection is produced to the adverse effect of the collection of iris recognition information, at the same spot radius S >=
During 62mm (face mean radius), it is ensured that facial illuminance is uniform, so as to realize that the illuminance of whole face is uniform, improve
Recognition efficiency, improves usage experience.
In various embodiments above, the wave-length coverage of the infrared iris light compensating lamp referred to is in 700~900nm, because iris is known
Other reliability and the contrast of the image of capture, depending on the contrast of eye color and the wavelength of light source, and iris is known
Other typical wavelengths are about 760 to 850nm, are adapted to the identification of the glasses of most of different colours, and because being in wavelength
During 810nm, all eye colors can be made to reach good effect, the infrared iris light compensating lamp for being this preferred 810nm is carried out
The light compensating lamp of iris recognition is optimal selection.
Claims (9)
1. the system that safety goggles are disturbed in a kind of iris identification device, including camera lens, infrared iris light compensating lamp, it is characterised in that：
The anglec of rotation g of the infrared iris light compensating lamp is metWherein, H is camera lens table
Face and the vertical range of face, L are the horizontal-shift distance of infrared iris light compensating lamp and illuminated eyes, and θ is angle threshold value.
2. the system that safety goggles are disturbed in iris identification device as claimed in claim 1, it is characterised in that：The infrared iris
Light compensating lamp includes the right infrared iris light filling for being located on the right side of the camera lens or upper right side or lower right side that left eye is alternately irradiated in pulse
The left infrared iris light compensating lamp for being located on the left of the camera lens or lower left side or upper left side of right eye is alternately irradiated in lamp, pulse.
3. the system that safety goggles are disturbed in iris identification device as claimed in claim 2, it is characterised in that：The right infrared rainbow
The alternating irradiation time interval t of film light compensating lamp and the left infrared iris light compensating lamp is：0<t≤1.5s.
4. the system that safety goggles are disturbed in iris identification device as claimed in claim 3, it is characterised in that：The time interval
T value is 0.5~1.0s.
5. the system that safety goggles are disturbed in iris identification device as claimed in claim 4, it is characterised in that：The time interval
T value is 0.5s.
6. the system that safety goggles are disturbed in the iris identification device as described in claim 1 or 2 or 3 or 4 or 5, it is characterised in that：
The wave-length coverage of the infrared iris light compensating lamp is：700~900nm.
7. the system that safety goggles are disturbed in iris identification device as claimed in claim 6, it is characterised in that：The infrared iris
The wave-length coverage of light compensating lamp is：760~850nm.
8. the system that safety goggles are disturbed in iris identification device as claimed in claim 6, it is characterised in that：The infrared iris
The wavelength of light compensating lamp is：810nm.
9. the system that safety goggles are disturbed in the iris identification device as described in claim 1 or 2 or 3 or 4 or 5, it is characterised in that：
The value of the θ is 0≤θ≤3 °.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062524A (en) * | 2017-12-13 | 2018-05-22 | 广东欧珀移动通信有限公司 | For the iris recognition component and electronic device of electronic device |
| CN111126145A (en) * | 2018-10-18 | 2020-05-08 | 天目爱视（北京）科技有限公司 | Iris 3D information acquisition system capable of avoiding light source image influence |
| CN116095407A (en) * | 2022-12-22 | 2023-05-09 | 深圳创维－Rgb电子有限公司 | Control method of user interface and related device |
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| CN104573676A (en) * | 2015-02-02 | 2015-04-29 | 北京天诚盛业科技有限公司 | Iris identification device capable of preventing glasses reflect light interference |
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| CN108062524A (en) * | 2017-12-13 | 2018-05-22 | 广东欧珀移动通信有限公司 | For the iris recognition component and electronic device of electronic device |
| CN111126145A (en) * | 2018-10-18 | 2020-05-08 | 天目爱视（北京）科技有限公司 | Iris 3D information acquisition system capable of avoiding light source image influence |
| CN111126145B (en) * | 2018-10-18 | 2024-05-10 | 天目爱视（北京）科技有限公司 | Iris 3D information acquisition system capable of avoiding influence of light source image |
| CN116095407A (en) * | 2022-12-22 | 2023-05-09 | 深圳创维－Rgb电子有限公司 | Control method of user interface and related device |
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