CN109190610A - Single channel iris detection equipment - Google Patents
Single channel iris detection equipment Download PDFInfo
- Publication number
- CN109190610A CN109190610A CN201811363328.4A CN201811363328A CN109190610A CN 109190610 A CN109190610 A CN 109190610A CN 201811363328 A CN201811363328 A CN 201811363328A CN 109190610 A CN109190610 A CN 109190610A
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- China
- Prior art keywords
- iris
- image
- single channel
- detection equipment
- object lens
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- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000003384 imaging method Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 10
- 238000005286 illumination Methods 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 210000001747 pupil Anatomy 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 208000024754 bloodshot eye Diseases 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 201000005111 ocular hyperemia Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 210000003786 sclera Anatomy 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a kind of single channel iris detection equipment, including shell, the acquisition window being passed to for iris image is provided on the shell；Enclosure interior is respectively arranged with detection device and lighting device, and the detection device includes camera board, and the imaging sensor for Image Acquisition is provided on the camera board, and described image sensor front end is successively arranged object lens and infrared fileter.By being imaged on the image sensor after being focused after infrared fileter by object lens, the iris image signal of eyes is converted into digital data transmission and gives camera board processing the iris image of the incoming eyes of acquisition window by imaging sensor.Single channel iris detection equipment of the present invention takes pictures to the iris information of eyes using single channel, while grabbing the image of 2 secondary bow films, which enormously simplifies system structure and saved equipment cost.
Description
Technical field
The present invention relates to single channel iris detection equipment, belong to field of optical measuring technologies.
Background technique
Iris is the circular tissue between eye black pupil and white sclera, includes interlaced similar
In the minutia of spot, filament, coronal, striped etc., these features can identify a person's identity.Iris detection equipment is logical
Comparison iris image is crossed to confirm personnel identity, there is uniqueness, stability, antifalsification and untouchable feature.
Iris recognition technology is the identity that people are determined by the similitude between comparison iris image feature.To all kinds of
The analysis of human body biological characteristics identification technology is compared and thought: iris recognition is " most accurate ", " processing speed is most fast " and " most
What hardly possible was forged ".This technology is now widely used for finance, customs, security protection and other need to carry out the field of identification.Rainbow
Film detection device needs to complete Image Acquisition, and image preprocessing and iris feature extract, the task of matching and identification.
Product on the market is all made of binocular form at present, and with two groups of light sources, two groups of camera lenses acquire right and left eyes respectively
Image information.Two groups of ray machine mould groups are independent of each other, and work alternatively, there is the shortcomings that time-consuming.
The present invention uses a kind of novel optical-mechanical system structure, is shot simultaneously using single channel, while grabbing 2 secondary bow films
Image.Single channel design makes it possible that the further simplification of this equipment is rapid, can substantially reduce while equipment is simplified
Image acquisition time, but to image brightness uniformity, the resolution ratio under big visual field proposes difficulty.
Summary of the invention
Goal of the invention: technical problem to be solved by the invention is to provide single channel iris detection equipment, can pass through list
The iris information of channel Quick Acquisition eyes, has the characteristics that collecting efficiency is high.
In order to solve the above technical problems, the technical scheme adopted by the invention is as follows:
Single channel iris detection equipment, including shell are provided with the collecting window being passed to for iris image on the shell
Mouthful；Enclosure interior is respectively arranged with detection device and lighting device, and the detection device includes camera board, sets on the camera board
It is equipped with the imaging sensor for Image Acquisition, described image sensor front end is successively arranged object lens and infrared fileter；Acquisition
By being imaged on the image sensor after being focused after infrared fileter by object lens, image passes the iris image of the incoming eyes of window
The iris image signal of eyes is converted into digital data transmission and gives camera board processing by sensor.
Wherein, the camera board include central processing unit and the storage unit being connect respectively with central processing unit,
Communication module and imaging sensor, camera board further include the power module for powering to each unit module.
Wherein, the picture signal that the central processing unit acquires imaging sensor is handled and passes through storage unit
Image data is stored, central processing unit carries out data interaction by communication module and external computer device.
Wherein, the lighting device includes the infrared LED being arranged in pairs, and infrared LED is symmetrical arranged by symmetry axis of object lens,
Infrared LED positioned at object lens two sides is respectively radiated on corresponding acquisition window, provides acquisition light source for system.
Wherein, the lighting device further includes the white light LEDs being arranged in pairs, and white light LEDs are that symmetrical axial symmetry is set with object lens
It sets, the white light LEDs positioned at object lens two sides are respectively radiated on corresponding acquisition window, are provided light filling for system, are avoided pupil
Hole extends influence acquisition quality.
Wherein, the infrared LED and white light LEDs are powered by the power module of camera board.
Wherein, the infrared LED center wave band is 810nm, and infrared LED single sided illumination range is 20mm to 40mm.
Wherein, the infrared fileter is bandpass filter, and central wavelength is consistent with infrared LED wavelength.
Compared with prior art, technical solution of the present invention has the beneficial effect that
Single channel iris detection equipment of the present invention takes pictures to the iris information of eyes using single channel, while grabbing 2
The image of secondary bow film, the design enormously simplify system structure and have saved equipment cost；System is carried out by high speed processor
Image procossing simultaneously stores image using high-speed processing apparatus, improves the speed of equipment acquisition image.Meanwhile by big wide
Angle object lens and infrared fileter handle image, improve image image quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of single channel iris detection equipment of the present invention；
Fig. 2 is the structure principle chart of single channel iris detection equipment camera board of the present invention；
Fig. 3 is the central processing unit circuit diagram of single channel iris detection equipment camera board of the present invention；
Fig. 4 is the image sensor circuit schematic diagram of single channel iris detection equipment camera board of the present invention；
Fig. 5 is the storage unit circuit schematic diagram of single channel iris detection equipment camera board of the present invention；
Fig. 6 is the communication module circuitry schematic diagram of single channel iris detection equipment camera board of the present invention；
Fig. 7 is the layout viewing of optical lens in object lens in single channel iris detection equipment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, technical scheme is described further.
As shown in figs. 1 to 6, single channel iris detection equipment of the present invention, including shell 1 are provided with for iris on shell 1
The incoming acquisition window 12 of image.When human eye iris capturing, human eye is close to acquisition window 12, and the iris image of eyes is respectively by adopting
Collect window 12 to enter in equipment.
Detection device and lighting device are respectively arranged with inside shell 1.Wherein, detection device includes camera board 2, camera board
The imaging sensor 21 for Image Acquisition is provided on 2.21 front end of imaging sensor is successively arranged object lens 3 and infrared fileter
4。
The iris image of the incoming eyes of acquisition window 1 is by being imaged on image after being focused after infrared fileter 4 by object lens 3
On sensor 21, the iris image signal of eyes is converted into digital data transmission and handled to camera board 2 by imaging sensor 21.
Camera board 2 includes central processing unit and the storage unit, the communication module that connect respectively with central processing unit
And imaging sensor, camera board 2 further include the power module for powering to each unit module.
Central processing unit handles the iris of both eyes picture signal that imaging sensor acquires and passes through storage unit
Image data is stored, central processing unit carries out data interaction by communication module and external computer device, can incite somebody to action
The image of acquisition process is exported.
Lighting device includes the infrared LED 51 being arranged in pairs, and infrared LED 51 is symmetrical arranged for symmetry axis with object lens 3, is located at
The infrared LED 51 of 3 two sides of object lens is respectively radiated on corresponding acquisition window 12, provides acquisition light source for system.It is infrared
The light that LED51 is issued is projected and is irradiated on human eye iris by acquisition window 12, as iris system infrared illumination.Its
In, 51 center wave band of infrared LED is 810nm, and 51 single sided illumination range of infrared LED is 20mm to 40mm, is guaranteed to iris illumination
Covering.
The design of infrared LED 51 directly affects illumination uniformity, and angle is less than normal, and NIR LED direct projection iris will lead to blood-shot eye illness,
The angle eye irradiate uniformity bigger than normal that will lead to is unsatisfactory for.Lighting Design uses oblique incidence by calculating, in certain angle range
It inside finds equalization point and solves the problems, such as blood-shot eye illness and illumination uniformity.
51 center wave band of infrared LED is 810nm in present device, and 10 ° of inclination is irradiated to two eye iris regions.White light
LED52 light filling leads to not collect iris to prevent the pupil diffusion under dark working condition.Infrared LED 51 shines iris
After penetrating, infrared and visible light is incident on infrared fileter 4, and infrared fileter 4 allow the light near 810nm wave band to enter object
Mirror 3.
Infrared fileter 4 is bandpass filter, and central wavelength is consistent with 51 wavelength of infrared LED.
Lighting device further includes the white light LEDs 52 being arranged in pairs, and white light LEDs 52 are symmetrical arranged by symmetry axis of object lens, position
White light LEDs 52 in object lens two sides are respectively radiated on corresponding acquisition window, and white light LEDs 52 provide light filling for system,
Avoid under dark condition pupil of human diffusion (if without white light LEDs 52, only infrared LED 51, when human eye is close to acquisition window
When 12, the visual field of human eye is under dark surrounds), to influence acquisition quality.
Infrared LED 51 and white light LEDs 52 are powered by the power module of camera board 2.
When system works, close to acquisition window 12, infrared LED 51 issues infrared light respectively and passes through corresponding collecting window human eye
Mouth 12 is irradiated on human eye iris.The reflected light (iris image) of human eye iris passes through infrared fileter after passing through acquisition window 12
4, infrared fileter 4 passes through object lens 3 after eliminating to veiling glare.Object lens 3 are irradiated to image biography after being focused to iris image
On sensor 21.
The arrangement mode of optical lens is as shown in fig. 7, convex lens 11 and concavees lens 12 play extensively in present device object lens
Angle effect, increases the field range of single camera lens, lens 13 play the role of aplanasia and distortion, are able to satisfy this wide-angle lens
Distortion requirement less than 1%, lens 14 are thick lens, play the role of achromatism and the correction curvature of field, are having extra wave band in this way
The image quality of camera lens will not be influenced into camera lens, curvature of field correction can make camera lens have the bigger depth of field, thus even if user
It can blur-free imaging when eyes and differentiated nose depth of beam.15 be the protecting window of camera board imaging sensor 21,
16 be the imaging surface of imaging sensor 21.Object lens 3 use such arrangement mode, can be realized the big visual field of broadband, Jin Ershi
It is bilateral that existing visual field can cover 40~80mm of interpupillary distance range from 5 years old child to adult.
Imaging sensor 21 is acquired image using MT9T006 imaging sensor, and image data is converted to number
Signal.Wherein, imaging sensor 21 uses 5mega pixels CMOS, meets SNR > 40% and 10 frame of frame per second >.
Central processing unit uses fpga chip, and model selects LCMXO2-2000.Central processing unit is by imaging sensor
The image data of 21 acquisitions handle and stored by storage unit.Storage unit is deposited using H57V2562GTR high speed
Chip is stored up, can satisfy zero access demand.
Meanwhile central processing unit is communicated by communication module with external computer device, it can be by the data of acquisition
It is transmitted.Wherein, communication module realizes USB interface communication using CY7C68013 chip.
The imaging viewing field angle of the object lens acquisition of single channel iris detection equipment of the present invention is big, and a piece of camera board needs
Two width iris pictures are collected simultaneously.In the case where camera frame per second is the same, the data of the image transmitting of single channel iris camera
Amount is big, speed faster because the data of same frame are twice of binary channels iris camera.
Claims (8)
1. single channel iris detection equipment, it is characterised in that: including shell, be provided on the shell incoming for iris image
Acquisition window；Enclosure interior is respectively arranged with detection device and lighting device, and the detection device includes camera board, the phase
The imaging sensor for Image Acquisition is provided on machine plate, described image sensor front end is successively arranged object lens and infrared filtering
Piece；The iris image of the incoming eyes of acquisition window is by being imaged on imaging sensor after being focused after infrared fileter by object lens
On, the iris image signal of eyes is converted into digital data transmission and gives camera board processing by imaging sensor.
2. single channel iris detection equipment according to claim 1, it is characterised in that: the camera board includes central processing
Unit and the storage unit connecting respectively with central processing unit, communication module and imaging sensor, camera board further include using
In the power module powered to each unit module.
3. single channel iris detection equipment according to claim 2, it is characterised in that: the central processing unit is to image
The picture signal of sensor acquisition handle and stored by storage unit to image data, and central processing unit passes through
Communication module and external computer device carry out data interaction.
4. single channel iris detection equipment according to claim 1, it is characterised in that: the lighting device includes setting in pairs
The infrared LED set, infrared LED are symmetrical arranged by symmetry axis of object lens, and the infrared LED positioned at object lens two sides is respectively radiated to and it
On corresponding acquisition window.
5. single channel iris detection equipment according to claim 1, it is characterised in that: the lighting device further includes pairs of
The white light LEDs of setting, white light LEDs using object lens as symmetry axis be symmetrical arranged, the white light LEDs positioned at object lens two sides be respectively radiated to
On its corresponding acquisition window.
6. single channel iris detection equipment according to claim 4 or 5, it is characterised in that: infrared LED and white light LEDs are logical
Cross the power module power supply of camera board.
7. single channel iris detection equipment according to claim 4, it is characterised in that: the infrared LED center wave band is
810nm, infrared LED single sided illumination range are 20mm to 40mm.
8. single channel iris detection equipment according to claim 1, it is characterised in that: the infrared fileter is band logical filter
Mating plate, central wavelength are consistent with infrared LED wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363328.4A CN109190610A (en) | 2018-11-15 | 2018-11-15 | Single channel iris detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363328.4A CN109190610A (en) | 2018-11-15 | 2018-11-15 | Single channel iris detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109190610A true CN109190610A (en) | 2019-01-11 |
Family
ID=64940141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811363328.4A Pending CN109190610A (en) | 2018-11-15 | 2018-11-15 | Single channel iris detection equipment |
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| Country | Link |
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| CN (1) | CN109190610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394507A (en) * | 2020-10-21 | 2021-02-23 | 天津中科智能识别产业技术研究院有限公司 | Iris imaging depth of field extension method based on liquid lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533473A (en) * | 2009-04-22 | 2009-09-16 | 孙敏霞 | Equipment for acquisition and processing of binocular iris images with single USB interfaces |
| CN201489550U (en) * | 2009-04-22 | 2010-05-26 | 北京森博克智能科技有限公司 | Equipment with single USB interface for obtaining and processing iris images of two eyes |
| CN202196428U (en) * | 2011-06-27 | 2012-04-18 | 王晓鹏 | Single image sensor self-adaptive binocular iris synchronous acquisition system |
| CN203773562U (en) * | 2013-02-06 | 2014-08-13 | 北京中科虹霸科技有限公司 | Portable two-eye iris image acquisition and processing equipment |
-
2018
- 2018-11-15 CN CN201811363328.4A patent/CN109190610A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533473A (en) * | 2009-04-22 | 2009-09-16 | 孙敏霞 | Equipment for acquisition and processing of binocular iris images with single USB interfaces |
| CN201489550U (en) * | 2009-04-22 | 2010-05-26 | 北京森博克智能科技有限公司 | Equipment with single USB interface for obtaining and processing iris images of two eyes |
| CN202196428U (en) * | 2011-06-27 | 2012-04-18 | 王晓鹏 | Single image sensor self-adaptive binocular iris synchronous acquisition system |
| CN203773562U (en) * | 2013-02-06 | 2014-08-13 | 北京中科虹霸科技有限公司 | Portable two-eye iris image acquisition and processing equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394507A (en) * | 2020-10-21 | 2021-02-23 | 天津中科智能识别产业技术研究院有限公司 | Iris imaging depth of field extension method based on liquid lens |
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