CN100524343C - Method and apparatus for collecting binoculus iris - Google Patents
Method and apparatus for collecting binoculus iris Download PDFInfo
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- CN100524343C CN100524343C CNB200710067470XA CN200710067470A CN100524343C CN 100524343 C CN100524343 C CN 100524343C CN B200710067470X A CNB200710067470X A CN B200710067470XA CN 200710067470 A CN200710067470 A CN 200710067470A CN 100524343 C CN100524343 C CN 100524343C
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Abstract
This invention relates to a method for collecting iris of double eyes and a related device including: setting the right and left eyeballs of a collected one at right and left semi-transparent and semi-reflecting mirrors, uniformly illuminating on the iris surfaces, adjusting the vibration directions used in adjusting the image light of the iris of the two eyes to be vertical to each other, finally storing the clear iris images. This invention provides a device applying this method.
Description
Technical field
The invention belongs to the technical field of living things feature recognition and information security, particularly a kind of acquisition method of iris of both eyes and device.
Background technology
Biometrics identification technology makes it surmount because of the intrinsic characteristic of biological characteristic (fingerprint, iris, face picture or the like) self and substitutes the possibility that traditional identity recognizing technology becomes a reality, and the specific application area in some countries and regions begins to be promoted and use.Wherein iris recognition aspect the accuracy of identification, show particularly outstanding, simultaneously because its unique physiological structure makes iris recognition technology have the application potential of the safer social environment of structure.But, the accuracy that iris recognition is outstanding is to be based upon on the basis that always can collect desirable iris image, and actual application environment be difficult to guarantee such basis, and this is the main difficulty that faces in pushing large-scale practical application to of iris recognition technology just.This nonideal iris image can bring two main problems for follow-up identification: one, same the iris not diversity of homogeneous collection increase; Its two, the loss of the effective information of single acquisition and the increase of interfere information.Final like this showing as in the class when coupling reduces apart from increase or between class distance, thereby reduces recognition performance.
Iris belongs to the outside visible tissue of the internal physiological organ of this human body uniqueness of eyeball, has some exclusive characteristics: studies show that a ratio stable and balance with an easier maintenance head of eyes when two eyes of human are observed a fixed target.Under the normal condition, people's the left and right sides eyeball and the action of last palpebra inferior are convergent.Though simultaneously there are individual differences such as build in the mankind, between the eyes variation of distance very little, the amplitude of variation of the external diameter of iris is minimum.Existing iris recognition all is based on the iris of single eyes, realize gathering simultaneously the iris of two eyes of the person of being identified if utilize specific device, improve the stability of the iris image of being gathered, will effectively reduce the adverse effect of two above-mentioned problems existing iris recognition performance.But disclosed at present documents and materials also do not have method and the research of harvester aspect accordingly about the iris of both eyes image of gathering the people simultaneously.
Summary of the invention
Purpose of the present invention is exactly the problem that runs in pushing large-scale practical application at existing iris recognition technology, has proposed a kind of method and corresponding harvester of gathering people's iris of both eyes image simultaneously, thereby has improved the performance of iris identification.
The step of the acquisition method of iris of both eyes is among the present invention:
1,, adjust to make the picture of left and right eyeball of oneself be in left and right two semi-transparent semi-reflecting lens by eyes imaging in semi-transparent semi-reflecting lens of picker according to oneself;
2, utilize the active near infrared light as imaging source, penetrate after the scattering and form area source, make the iris surface obtain uniform illumination; It is vertical mutually to utilize two vertical polaroids in polarization direction to be used in the direction of vibration of imaging of left and right eyes iris;
3, the sharpness that is incident upon imaging in the pupil according to imaging source judges whether the iris image gathered is clear, and iris image is preserved clearly.
The present invention utilizes the distance between the human eyes and the stability of iris external diameter, the stationarity that eyes focus on and locate, and the left and right sides eyeball and the homoplasy of eyelid movement up and down, iris of both eyes and imaging plane keep better parallel when making collection, and can allow the left and right iris image that obtains have symmetry, and in repeatedly gathering, keep stable.
The present invention utilizes the semi-transparent semi-reflecting lens guiding to be in suitable position by the picker, and utilize semi-transparent semi-reflecting lens size in vertical direction to dwindle the amplitude of variation of iris size in the original image of being gathered, and make iris of both eyes because the rotation that the deflection of head causes is limited in the scope that can control; The direction of vibration of the imaging of left and right sides iris vertically can reduce the cross interference of imaging source to iris image mutually.
Whether clearly the iris image that judgement is gathered method adopts present general image sharpness computation method, selects the iris image that should preserve and finishes collection with this.The present invention only is calculated to be as light source projects imaging in pupil is whether clear to judge whether the iris image of being gathered is clear, can significantly reduce calculated amount, thereby improve computing velocity.
Among the present invention the employed device of the acquisition method of iris of both eyes comprise be arranged in parallel about gather camera lens, collection plate, initiatively near-infrared light source and sensing device, the dead ahead of gathering camera lens about wherein collection plate is arranged on; Be disposed with left and right sides semi-transparent semi-reflecting lens, left and right sides polaroid, left and right sides scatter plate on the collection plate, and left and right sides semi-transparent semi-reflecting lens, left and right sides polaroid, left and right sides scatter plate with about to gather lens location corresponding, left and right sides scatter plate near about gather the camera lens setting; Initiatively near-infrared light source is arranged on scatter plate rear, the left and right sides, about gather camera lens and be connected to microprocessor respectively with by left and right sides camera; About gather camera lens, left and right sides camera, initiatively near-infrared light source is connected with control circuit respectively with sensing device.The polarization direction of left and right sides polaroid is vertical; Left and right sides semi-transparent semi-reflecting lens is a rectangle, they are coaxial with left and right sides polaroid and scatter plate center, the left and right sides respectively, according to existing anthropology and biological statistics, length 35mm≤A≤the 45mm of left and right sides semi-transparent semi-reflecting lens is set, width 11mm≤B≤15mm, the centre distance 75mm of left and right sides semi-transparent semi-reflecting lens≤H≤85mm.
Semi-transparent semi-reflecting lens is because its mirrored effect enables to attract by picker's attention rapidly, and guiding is in suitable position by the picker.The sensing device effect is to detect by picker's position, when being in effective collection position by the picker, and the output cue, Drive and Control Circuit starts the collection process, can adopt near switch or infrared distance measurement device or the like device.Initiatively near-infrared light source produces near infrared light as imaging source, carries out scattering to obtain the imaging effect of area source by scatter plate, utilizes polaroid to modulate then.About polaroid is divided into two, and modulation direction is vertical mutually, make that the direction of vibration of imaging of left and right sides iris is vertical mutually, to avoid the cross interference of left and right sides imaging source.Control circuit drives the active near-infrared light source and gathers camera lens and the signal that begins to gather is provided, when driving circuit is opened, at first excitation active near-infrared light source makes it to produce near infrared light and opens camera, export the collection process of signal enabling that begins to gather then, drive the zoom motor of gathering camera lens simultaneously, produce the continuous vari-focus of determining the scope and time section.Gather camera lens and camera and adopt existing product, for example Seiko SE5018 camera lens and WATEC902H camera, in the scope of gathering the camera lens continuous vari-focus, camera is gathered each width of cloth of left and right iris image according to the time interval of determining and in each interval, is kept at then in the image buffer storage of microprocessor.Microprocessor carries out the pupil coarse positioning to the every width of cloth image in the buffer memory to be handled, calculating is arranged in the sharpness of pupil imaging source imaging, find out distinct image in the image sequence of images of left and right eyes iris as criterion respectively, preserve this two width of cloth image then and finish the collection process.Gather camera lens, camera and microprocessor be connected and gatherer process adopts the common method of existing iris recognition.
The present invention be a kind of stability, eyes that utilize distance between the human eyes and iris external diameter focus on and the stationarity of location and left and right sides eyeball and up and down the people's such as homoplasy of eyelid movement physiological property gather people's iris of both eyes image simultaneously, can obtain the more stable iris image and the method and apparatus of the iris texture characteristic information of horn of plenty more in actual applications.
Because the left and right semi-transparent semi-reflecting lens that the present invention adopts is identical and the center on same horizontal line, eyeglass is only big slightly than the diameter of actual iris in the size of vertical direction simultaneously, the iris of own right and left eyes can in the eyeglass of the left and right sides, be observed simultaneously by the picker, when the iris in the eyeglass of the left and right sides is all complete, can be so that be kept level substantially by picker's head, so the anglec of rotation of the iris that gather this moment can be limited in the small range, and the anglec of rotation of left and right sides iris is roughly the same.
Because the present invention gathers the iris image of eyes simultaneously, therefore can obtain abundant more iris image texture information; And because this collection meets people's daily state more, so under the repeatedly acquisition state in actual use, make the iris image that collects keep better stability; Again because left and right sides eyeball and the homoplasy and the symmetry of eyelid movement up and down make that when location Calculation therefore the iris direction parameter reference each other of left and right sides iris image is calculated and expended the twice of locating much smaller than single image.
Because the present invention adopts polaroid, and the polarization direction of left and right sides polaroid is vertical mutually, therefore can avoid the cross interference of left and right sides imaging source picture of self when iris imaging.
Because the present invention adopts near sensing devices such as switch or infrared distance measurement devices, make and have only in the scope of being determined by the picker, harvester is just started working, therefore can prolong initiatively near-infrared light source, in the serviceable life of camera equal loss device, can strengthen the unmanned performance of iris capturing device in the actual use.
Description of drawings
Fig. 1 is the structural representation that installs among the present invention;
Fig. 2 is the structural representation of collection plate among Fig. 1.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
The harvester of iris of both eyes of the present invention as depicted in figs. 1 and 2, left and right sides acquisition channel is identical.Semi-transparent semi-reflecting lens 9 is embedded in harvester towards by on picker's the front panel, guides to be in suitable position by the picker.When being in effective collection position by the picker, near switch 1 output cue, Drive and Control Circuit 2, control circuit 2 triggers near-infrared light source 5 and gathers camera lens 6, and provides the signal enabling that begins to gather to gather process.Near-infrared light source 5 produces near infrared light as imaging source, carries out scattering to obtain the imaging effect of area source by scatter plate 7, utilizes polaroid 8 to modulate then.About polaroid 8 is divided into two, and modulation direction is vertical mutually, make that the direction of vibration of imaging of left and right sides iris is vertical mutually, to avoid the cross interference of left and right sides imaging source.After gathering process initiation, at first excitation active near-infrared light source 5 makes it to produce near infrared light and opens camera 4, export the collection process of signal enabling that begins to gather then, drive the zoom motor of gathering camera lens 6 simultaneously, produce the continuous vari-focus of determining the scope and time section.Camera 4 is gathered each width of cloth of left and right iris image according to the time interval of determining and in each interval in the scope of continuous vari-focus, be kept at then in the image buffer storage of microprocessor 3.Every width of cloth image in 3 pairs of buffer memorys of microprocessor carries out the pupil coarse positioning to be handled, calculating is arranged in the sharpness of pupil imaging source imaging, find out distinct image in the image sequence of images of left and right eyes iris as criterion respectively, preserve this two width of cloth image then and finish the collection process.
The use operating process of this device: when in the definite scope that is moved to the collection terminal that exposes apart from harvester by the picker, the red led of sensing device triggering collection end, prompting has been in suitable collection distance by the picker, the picture of left and right sides iris that can be observed oneself by semi-transparent semi-reflecting lens 9 by the picker is to adjust the position of oneself, a left side in semi-transparent semi-reflecting lens 9, the picture of right iris all is kept perfectly, and be full of whole semi-transparent semi-reflecting lens 9 in vertical direction substantially, this moment, red led went out, prompting is begun by picker's process of gathering, the position that keeps oneself, bright until green indicating lamp, signal is finished acquisition state by the picker.When be close to by the picker distance near the scope of switch 1 dead ahead 50cm in the time, will trigger near switch 1; The parameter of semi-transparent semi-reflecting lens 9 is: as light wavelength λ〉during 700nm, transmission, its coreflection; When red pilot lamp goes out, the collection process begins, control circuit 2 drives the zoom motor of gathering camera lens 6 travels through camera lens continuously in two seconds time whole focal range, gather camera lens 6 and use Seiko SE5018 auto iris, motorized zoom lens, camera 4 every interval 100ms gather left and right iris image one width of cloth then, promptly in whole collection period, about respectively gathered 20 width of cloth images and deposited image buffer storage in.Adopt the WATEC902H camera in the present embodiment, left and right acquisition channel utilizes the device of same model to form two symmetry and acquisition channels independently fully.3 pairs of sequence of left-right images of microprocessor are carried out identical processing then, earlier every width of cloth image is carried out the pupil coarse positioning, carry out size and brightness normalization then, and calculate the mean flow rate of the picture that is positioned at pupil that light source became, the mean square deviation and the pixel number of brightness, satisfying mean flow rate greater than 180, pixel number was greater than 150 o'clock, the distinct image the most of mean square deviation minimum, respectively find out piece image thus and deposit storer in as the result of this time collection from left and right image sequence, the collection process is finished.
Claims (3)
1, the acquisition method of iris of both eyes is characterized in that this method may further comprise the steps:
1. by eyes in semi-transparent semi-reflecting lens the imaging of picker, adjust and make the picture of left and right eyeball of oneself be in left and right two semi-transparent semi-reflecting lens according to oneself;
2. utilize the active near infrared light as imaging source, penetrate after the scattering and form area source, make the iris surface obtain uniform illumination; It is vertical mutually to utilize two vertical polaroids in polarization direction to be used in the direction of vibration of imaging of left and right eyes iris;
3. the sharpness that is incident upon imaging in the pupil according to imaging source judges whether the iris image gathered is clear, and iris image is preserved clearly.
2, adopt the harvester of the employed iris of both eyes of claim 1 method, it is characterized in that this device comprise be arranged in parallel about gather camera lens, gather the dead ahead of camera lens about the collection plate of this device is arranged on; Be disposed with left and right sides semi-transparent semi-reflecting lens, left and right sides polaroid, left and right sides scatter plate on the collection plate, and left and right sides semi-transparent semi-reflecting lens, left and right sides polaroid, left and right sides scatter plate with about to gather lens location corresponding, wherein left and right sides scatter plate near about gather the camera lens setting; Initiatively near-infrared light source is arranged on scatter plate rear, the left and right sides, about gather camera lens and be connected to microprocessor by left and right sides camera respectively; About gather camera lens, left and right sides camera, initiatively near-infrared light source is connected with control circuit respectively with sensing device; The polarization direction of described left and right sides polaroid is vertical.
3, the harvester of iris of both eyes as claimed in claim 2, it is characterized in that left and right sides semi-transparent semi-reflecting lens is a rectangle, they are coaxial with left and right sides polaroid and scatter plate center, the left and right sides respectively, its length 35mm≤A≤45mm, width 11mm≤B≤15mm, the centre distance 75mm of left and right sides semi-transparent semi-reflecting lens≤H≤85mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710067470XA CN100524343C (en) | 2007-03-13 | 2007-03-13 | Method and apparatus for collecting binoculus iris |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200710067470XA CN100524343C (en) | 2007-03-13 | 2007-03-13 | Method and apparatus for collecting binoculus iris |
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| CN101021901A CN101021901A (en) | 2007-08-22 |
| CN100524343C true CN100524343C (en) | 2009-08-05 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101411606B (en) * | 2007-10-15 | 2010-09-08 | 倪蔚民 | Biological measuring system for combined iris and cortex tissue |
| CN110135367A (en) * | 2013-10-21 | 2019-08-16 | 王晓鹏 | A kind of method and apparatus of biological characteristic imaging |
| CN204129314U (en) | 2014-05-22 | 2015-01-28 | 宁波舜宇光电信息有限公司 | A kind of videography optical lens group and iris camera module |
| CN104239815A (en) * | 2014-09-19 | 2014-12-24 | 西安凯虹电子科技有限公司 | Electronic document encryption and decryption method and method based on iris identification |
| CN104992163B (en) * | 2015-07-22 | 2019-01-08 | 江苏天诚智能集团有限公司 | A kind of facial image and iris image acquire Optical devices and its identity identifying method simultaneously |
| US10049272B2 (en) * | 2015-09-24 | 2018-08-14 | Microsoft Technology Licensing, Llc | User authentication using multiple capture techniques |
| CN108369338B (en) * | 2015-12-09 | 2021-01-12 | 快图有限公司 | Image acquisition system |
| CN109697419A (en) * | 2018-12-17 | 2019-04-30 | 北京中科虹霸科技有限公司 | It takes the photograph iris capturing equipment for a kind of pair and takes the photograph synchronous images transmission method with double |
| CN110674682B (en) * | 2019-08-15 | 2021-12-14 | 武汉虹识技术有限公司 | Binocular iris image acquisition device and method |
| CN110781745B (en) * | 2019-09-23 | 2022-02-11 | 杭州电子科技大学 | Tail eyelash detection method based on composite window and gradient weighted direction filtering |
| CN114511052B (en) * | 2022-01-21 | 2023-06-16 | 重庆市规划和自然资源信息中心 | System for realizing paperless handling of real estate registration window |
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