CN100392669C - Method and device for vivi-detection in iris recognition - Google Patents
Method and device for vivi-detection in iris recognition Download PDFInfo
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- CN100392669C CN100392669C CNB200610053495XA CN200610053495A CN100392669C CN 100392669 C CN100392669 C CN 100392669C CN B200610053495X A CNB200610053495X A CN B200610053495XA CN 200610053495 A CN200610053495 A CN 200610053495A CN 100392669 C CN100392669 C CN 100392669C
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Abstract
This invention relates to one pupillary identification living test method and its relative device, which comprises the following steps: using pupillary and human eye physiological and physical property to control infrared light source according to random sequence and to store the relative digital marks; collecting the image sequence under light source pupillary and eye ball and extracting pupil fringe contract diffraction board formed image characteristics and to realize the living pupillary test according to the characteristics digital mark relationship.
Description
Technical field:
The invention belongs to the technical field of living things feature recognition and information security, biopsy method and corresponding device thereof in particularly a kind of iris recognition.
Background technology:
Identity recognizing technology based on iris is one of biometrics identification technology that rose gradually in recent years, come into operation within the specific limits, for example: the immigration management of the United Arab Emirates and evictee's tracker (The UAE Iris Expellees Tracking and Border ControlSystem, The Proceeding of Biometrics consortium conference 2005, Hyatt Regency Crystal City, Arlington, VA, USA) or the like, the accuracy and the unfailing performance that show iris recognition are very outstanding, but a necessary prerequisite is: the biological attribute data of iris can only be owned by legal identity user.It is the key issue of present iris authentication system self-security that living body iris detects, and also is one of the direction of the primary study of iris recognition technology.Attack based on the security of the identification system of iris is mainly concentrated on the iris data aspect, for example: utilize the iris deception recognition system of forging, thereby obtain authority of legal identity or the like.Because what iris recognition was handled is view data, so the iris that utilizes photo, pad pasting or the like means to forge is usually cheated the iris capturing device.Produced various method for anti-counterfeit thus, for example: judging whether be the iris of forging according to the composition of various frequency contents in the image of gathering, is exactly present main research direction and method; But if use different materials to come false iris images, also can change the frequency content of image, perhaps utilize certain material to come iris image texture that is virtually reality like reality, all may avoid the purpose that this detection method reaches deception.
Summary of the invention:
Purpose of the present invention is exactly at the deficiencies in the prior art, a kind of biopsy method and device of iris are proposed, being conceived to iris is the organism of a work, utilize the physical characteristics of eyeball optics system and the physiological property of iris uniqueness, detect the eyeball whether iris of being gathered comes from live body, strengthen the anti-pseudo-performance of iris authentication system and the security performance of self.
Biopsy method concrete steps among the present invention in the iris recognition are: utilize the physiology and the physical characteristics of iris and people's eyeball, produce control signal according to random series and control near-infrared light source, and store the figure notation of this random series correspondence; Be captured in iris and the aitiogenic image sequence of eyeball under this light source excitation, and extract the feature of pupil edge convergent-divergent and the feature of scattering light-passing board imaging; Realize whether being the detection of living body iris according to the corresponding relation of this feature and figure notation.
The device of realizing this method comprises intelligent data collecting unit and live body detecting unit, and signal connects between intelligent data collecting unit and the live body detecting unit.Wherein intelligent data collecting unit comprises image capture module, near infrared initiatively light source module and intelligent control module; The live body detecting unit is an embedded computer.
Image capture module comprises camera lens, camera and image pick-up card.The output of camera is by the video input interface of video signal cable incoming image capture card, and camera lens is connected by adapter ring with camera.Image pick-up card adopts existing product, for example CG400.
Near infrared initiatively light source module comprises near-infrared luminous pipe, direct supply, control circuit board, snoot and scattering light-passing board.Two pins of near-infrared luminous pipe are connected with the direct supply two ends, and near-infrared luminous pipe is fixed on the control circuit board, and control circuit board is fixed in wealthy mouthful of end of snoot; The scattering light-passing board is fixed in snoot slot one end.Image capture module is fixedly installed in the snoot along the central axis of snoot.
Described snoot is an infundibulate, the inside surface polishing, and described scattering light-passing board is a transparent material, the rotation frosted direction of its surfaces externally and internally is opposite.Intelligent control module is a microprocessor, can produce control signal according to random series, operate the conducting of near-infrared luminous pipe and end by control circuit board, and import the live body detecting unit together with the figure notation of the random series of real-time control signal correspondence and in the realtime graphic sequence that this control signal hypograph acquisition module collects.This microprocessor adopts existing product, for example PC104.
The embedded computer of live body detecting unit detects the feature of scattering light-passing board imaging in the image sequence that is collected, and the feature of pupil edge convergent-divergent; According to the feature of extracting, contrast the figure notation of real-time control signal more then, the feature of utilization storage in advance and the mapping table of control signal are compared and are judged, finish the living body iris measuring ability.
The present invention is a kind of unique physiology of living body iris and eyeball and method and apparatus that physical characteristics realizes detecting the iris live body of utilizing, compared with prior art, on overall plan, abandoned the whether thinking that detects of the frequecy characteristic of the directly related iris texture of live body of dependence and iris, directly utilize the iris of live body and the physiology of eyeball and this essential characteristic of reaction that the physics function can produce under the excitation of light to realize detecting, improved the reliability that live body detects.
Because the present invention adopts the method that produces the control signal of near-infrared light source according to random series at intelligent data collecting unit, make that control signal is difficult to tracked and duplicates in gathering in real time, strengthened the correctness and the security that detect.
Because the present invention extracts the feature of scattering light-passing board imaging in the image sequence that collects and the feature of pupil edge convergent-divergent simultaneously in the employing of live body detecting unit, strengthened the robustness that detects.
Description of drawings:
Fig. 1 is the biopsy method in the iris recognition and the principle schematic of device;
Fig. 2 is the structural representation of intelligent data collecting unit;
Fig. 3 is the electric principle schematic of control circuit board.
Embodiment:
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the biopsy method in the iris recognition of the present invention and the structural representation of device: biopsy method in the present embodiment iris recognition and device can be divided into two parts: the dotted line left side is the live body detecting unit on intelligent data collecting unit and dotted line right side among the figure.In intelligent data collecting unit, intelligent control module produces the initiatively control signal of light source module of near infrared according to random series, under the effect of this control signal, near infrared active light source module provides the near infrared imaging light source of cycle variation, image capture module is gathered the image of iris in each cycle that light source changes, then will such set of diagrams picture and the figure notation of the control signal correspondence of intelligent control module generation import the live body detecting unit together; The characteristic extracting module of live body detecting unit is carried out Iris Location to image earlier, extract the feature of scattering light-passing board imaging in the image and the feature that pupil boundary changes again, the comparison judge module realizes judging detection according to the formation corresponding relation of the figure notation of feature of being extracted and control signal with reference to the correct relation table of having stored.
Fig. 2 has provided the agent structure synoptic diagram of intelligent data collecting unit in biopsy method in the iris recognition and the device: link to each other with adapter ring 3 between video automatic diaphragm lens 1 and the highly sensitive camera 2, video output terminal 7 links to each other with image pick-up card by video line; Scattering light-passing board 4 is an annular, embeds the end of snoot 5 near the video automatic diaphragm lens, and the front end driving fit of video automatic diaphragm lens 1 embeds the endoporus of scattering light-passing board 4, and is concordant with the anchor ring of scattering light-passing board 4; Control circuit board is fixed on the end of snoot 5 away from the video automatic diaphragm lens with screw, and middle perforate allows the rear end driving fit of highly sensitive camera 2 pass; Near-infrared luminous pipe 6 is welded on the place of close snoot 5 inwalls on the control circuit board 8, evenly distributes along snoot 5 inwalls, and the light that makes near-infrared luminous pipe 6 as much as possible send sees through scattering light-passing board 4 through snoot reflection back.
Fig. 3 has provided the electric principle schematic of control circuit board in biopsy method in the iris recognition and the device: after each near-infrared luminous pipe 6 and protective resistance 12 series connection, be connected direct supply 10 two ends; The break-make of time-delay/guard relay 9 control entire circuit, the control signal that the trigger end 11 of time-delay/guard relay 9 is accepted according to the random series generation.
Table 1 has provided the feature of scattering light-passing board imaging in the image that the characteristic extracting module of biopsy method in the present embodiment iris recognition and device institute reference extracts and the feature that pupil boundary changes and the correct corresponding relation of figure notation of control signal, " ★ " is illustrated under the condition of random series of control signal as shown in Table, the feature that the feature of scattering light-passing board imaging and pupil boundary change in the image that characteristic extracting module is extracted only forms corresponding relation in this position, if and only if when all " ★ " occur in the position shown in the table, and being illustrated in the detected iris of this time is live body.
Table 1
During installation, connect video automatic diaphragm lens 1 and highly sensitive camera 2 with adapter ring 3 earlier, connect the video input terminal 7 of highly sensitive camera 2 and the video inputs of image pick-up card with vision cable then; Control signal wire with intelligent control module c is connected to the initiatively control end of light source module b of near infrared again, and the output of direct supply is connected to the initiatively power end of light source module b of near infrared, finishes the installation of intelligent data collecting unit; Installation procedure soft according to the common application computing machine then, hardware is installed the live body detecting unit.
The use operating process of this device is as follows:
The user is positioned at camera lens the place ahead of intelligent data collecting unit, makes image capture module a can collect user's iris image, finishes prompt tone up to hearing to gather; During this period of time, intelligent control module has produced 5 control signals according to random series, near infrared active light source module is controlled near-infrared luminous pipe 6 and is finished 5 conductings or off period under the effect of these control signals, each cycle kept 0.5 second, image capture module is gathered a width of cloth iris image in each cycle, the figure notation of the control signal that these images and its corresponding intelligent control module are produced is imported the live body detecting unit together then; The characteristic extracting module of live body detecting unit positions processing respectively to each width of cloth image, extract the feature of scattering light-passing board 4 imagings in the image and the boundary characteristic of pupil, compare judge module then according to the feature of characteristic extracting module gained and the figure notation of its corresponding control signal, compare with correct mapping table again, finish the function that the iris live body detects, and the output testing result.
In the present embodiment, image capture module adopts video automatic diaphragm lens, highly sensitive CCD camera and high speed image acquisition board, satisfies and regulates automatically under aperture and the low light conditions, the requirement of high speed acquisition image; Scattering light-passing board 4 in the near infrared active light source module is an annular, selects for use acrylic board to make, 3 millimeters of thickness, and the rotation frosted direction of surfaces externally and internally is opposite, to guarantee dispersion effect; Snoot 5 adopts infundibulate, and the inside surface polishing is to strengthen the reflection of light, and less near the port footpath of camera lens, the bore of the other end is bigger; The microprocessor of intelligent control module produces control signal according to random series, is transferred to the initiatively control end of light source module of near infrared by address wire, through the time-delay/guard relay on the control circuit board 89 switch near-infrared luminous pipe 6 conducting and
The retention time of time-delay/guard relay 9 is 0.5 second, and microprocessor is controlled visual acquisition module and gathered a secondary bow film image in the second half section of each retention time simultaneously, and this image and corresponding control signal figure notation are transferred to the live body detecting unit together; Characteristic extracting module is extracted the feature of scattering light-passing board 4 imagings in the image and the feature of pupil boundary after image is positioned processing, just whether have the running parameter of the speck and the pupil radius of annular in pupil; The comparison judge module is according to the corresponding relation of the figure notation of these the two kinds of features that obtain in real time and control signal, the table of comparisons 1, and what be in " ★ " mark position then is judged as living body iris, and remaining is exactly the non-living body iris.
Claims (2)
1. the biopsy method in the iris recognition, it is characterized in that this method may further comprise the steps: physiology and the physical characteristics of utilizing iris and people's eyeball, produce control signal according to random series and control the conducting of near-infrared light source or end, and store the figure notation of this random series correspondence; The light that near-infrared light source sends sees through scattering light-passing board excitation iris and eyeball produces reaction, be captured in iris and the aitiogenic image sequence of eyeball under this near infrared light source forcing simultaneously, and extract the feature of pupil edge convergent-divergent and the feature of pupil inscattering light-passing board imaging; Realize whether being the detection of living body iris according to the feature of pupil edge convergent-divergent, the feature of pupil inscattering light-passing board imaging and the corresponding relation of figure notation.
2. adopt the employed device of claim 1 method, it is characterized in that this device comprises intelligent data collecting unit and live body detecting unit, signal connects between intelligent data collecting unit and the live body detecting unit; Wherein intelligent data collecting unit comprises image capture module, near infrared initiatively light source module and intelligent control module; The live body detecting unit is an embedded computer; Intelligent control module is a microprocessor, can produce control signal according to random series, conducting by control circuit board control near-infrared light source and ending, and import the live body detecting unit together with the figure notation of the random series of real-time control signal correspondence and in the realtime graphic sequence that this control signal hypograph acquisition module collects; Image capture module is gathered the image of iris in each cycle that light source changes, then will such set of diagrams picture and the figure notation of the control signal correspondence of intelligent control module generation import the live body detecting unit together;
Image capture module comprises camera lens, camera and image pick-up card; The output of camera is by the video input interface of video signal cable incoming image capture card, and camera lens is connected by adapter ring with camera;
Near infrared initiatively light source module comprises near-infrared luminous pipe, direct supply, control circuit board, snoot and scattering light-passing board; Two pins of near-infrared luminous pipe are connected with the direct supply two ends, and near-infrared luminous pipe is fixed on the control circuit board, and control circuit board is fixed in wealthy mouthful of end of snoot; The scattering light-passing board is fixed in snoot slot one end; Image capture module is fixedly installed in the snoot along the central axis of snoot;
Described snoot is an infundibulate, the inside surface polishing, and described scattering light-passing board is a transparent material, the rotation frosted direction of its surfaces externally and internally is opposite.
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| CNB200610053495XA CN100392669C (en) | 2006-09-21 | 2006-09-21 | Method and device for vivi-detection in iris recognition |
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| CNB200610053495XA CN100392669C (en) | 2006-09-21 | 2006-09-21 | Method and device for vivi-detection in iris recognition |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833646B (en) * | 2009-03-11 | 2012-05-02 | 北京中科虹霸科技有限公司 | In vivo iris detection method |
| GB201000973D0 (en) * | 2010-01-21 | 2010-03-10 | Glynn Chris | Non-evasive spectrophotometer and related method |
| CN104252622A (en) * | 2014-10-15 | 2014-12-31 | 倪蔚民 | Mobile terminal front-mounting and iris identification integration photoelectric imaging system and method |
| CN105550625B (en) * | 2015-06-30 | 2018-12-25 | 宇龙计算机通信科技(深圳)有限公司 | A kind of living body iris detection method and terminal |
| CN105930761A (en) * | 2015-11-30 | 2016-09-07 | 中国银联股份有限公司 | In-vivo detection method, apparatus and system based on eyeball tracking |
| CN105447483B (en) * | 2015-12-31 | 2019-03-22 | 徐州旷视数据科技有限公司 | Biopsy method and device |
| CN110705507B (en) | 2016-06-30 | 2022-07-08 | 北京七鑫易维信息技术有限公司 | Identity recognition method and device |
| CN106778469A (en) * | 2016-10-25 | 2017-05-31 | 山西天地科技有限公司 | A kind of detection method of living body iris |
| CN107368791A (en) * | 2017-06-29 | 2017-11-21 | 广东欧珀移动通信有限公司 | Living iris detection method and Related product |
| CN108647650B (en) * | 2018-05-14 | 2021-07-09 | 北京大学 | Human face in-vivo detection method and system based on corneal reflection and optical coding |
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