CN1545057A - Open type iris image automatic collecting device - Google Patents
Open type iris image automatic collecting device Download PDFInfo
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- CN1545057A CN1545057A CNA2003101132870A CN200310113287A CN1545057A CN 1545057 A CN1545057 A CN 1545057A CN A2003101132870 A CNA2003101132870 A CN A2003101132870A CN 200310113287 A CN200310113287 A CN 200310113287A CN 1545057 A CN1545057 A CN 1545057A
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- 238000005286 illumination Methods 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000001508 eye Anatomy 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 210000005252 bulbus oculi Anatomy 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 241000218691 Cupressaceae Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention relates to an open automatic iris images collecting device, where the lens and the collector are installed, coaxially, the lens fixed on a support plate and a focusing mechanism covered on the lens. The distance sensor and the infrared head lamps are installed on the support plate, and these head lamps are uniformly distributed along a circle outside the lens. The control circuit is connected with the collector, the distance sensor, the head lamps and the focusing mechanism, respectively. It can automatically collect iris images without any operator; it simplifies the illuminator without diffused processing, thus lowering the cost; it need not make accurate determination and control, thus largely reducing the hardware cost and simplifying the control circuit.
Description
Technical field the present invention relates to a kind of open iris image automatic acquisition device, belongs to living things feature recognition and secure authentication technology field.
The collection of background technology iris image is a pith in the iris identification system, and the performance of front-end collection equipment is directly connected to the quality of the iris image quality of adopting.Existing iris capturing device can be divided into two classes from user perspective, and a class is open harvester, and another kind of is enclosed harvester.
Enclosed harvester adopts the contact collection, and the user on a certain parts in the human eye stationary installation, is thrown light in the environment of sealing, image acquisition in use.Being called " living body iris harvester ", the patent No. as name is that the Chinese patent of CN01278644.6 discloses a kind of closed iris image acquiring device, its advantage is: can better user's eyeball be located in place, needn't too much consider the adjustment problem of optical system; Can realize more satisfactory light illumination environment, get rid of the interference of extraneous light simultaneously, result's brightness, contrast are all more fixing.But closed harvester has its significant disadvantage: stationary installation can not be accomplished the accurate match to everyone shape of face, when device is attached at around the frame, can make eyeball produce certain asymmetrical distortion; User's acceptance is very poor.One big advantage of iris identification is exactly a contactless identification, after the employing stationary installation, can seriously weaken its user's acceptance; For the field of employment of adopting stationary installation, closed harvester is not suitable for the height different crowd, can produce great inconvenience when the user uses.
When open harvester was worked, user's position was relatively freer, ambient lighting environment more complicated.In order to collect distinct image, hardware and quality evaluation algorithm need mutually combine.In existing technology, the light source of illumination generally adopts the disperse light source, thereby avoids reflective the influence picture quality of lighting source on eyes.Simultaneously, the employing of some auxiliary alignment devices makes the user can adjust to a suitable position voluntarily.Being called " iris image pick device and iris identification device ", publication number as name is to disclose a kind of typical fixed open iris capturing device in 1416779 the Chinese patent application, and the open iris capturing device of a kind of hand-held of OKI company design.Open harvester generally adopts the pure software algorithm that iris image is carried out intelligibility evaluation in gatherer process.Its shortcoming is as follows: the influence of motion wire drawing: when the staggered scanning camera is taken high-speed moving object, scanning result shows motion wire drawing phenomenon, can produce very high " vacation " articulation index, object for rapid movement, because the camera primary field is swept the restriction of speed, also can produce the wire drawing phenomenon; The noise: under the open environment, noise level can produce obvious variation with different illumination conditions.The picture noise level that illumination is good is low, and the image of illumination difference, noise level will become very high, and the automatic equalization function of camera can make noise amplify.Like this, when the evaluation map image sharpness, the excessive noise that the low-light (level) situation produces will produce higher high fdrequency component index, make to adopt high fdrequency component to judge that image definition is ineffective.Calculated amount is bigger: the analysis of iris image sharpness is based upon on the basis that iris position calculation and image energy in the image are analyzed, the calculation operations amount is very big, the needed hardware performance of real-time operation is too high, is unfavorable for the reduction of hardware equipment cost, thereby has limited the iris authentication system application.
Summary of the invention the objective of the invention is to propose a kind of fixing open iris image automatic acquisition device, automatically to gather the client iris image in the certain space scope, and do not need user's direct intervention, meet in some occasion and avoid the specific (special) requirements that found by the measured.
The open iris image automatic acquisition device of the present invention's design comprises image acquisition device, camera lens, range sensor, infrared illumination lamp, focus adjusting mechanism and control circuit; The coaxial installation of described camera lens and image acquisition device, camera lens is fixed on the back up pad, and focus adjusting mechanism is enclosed within on the camera lens; Described range sensor and infrared illumination lamp are installed on the back up pad, the circumference uniform distribution of infrared illumination lamp outside camera lens; Described control circuit links with image collector, range sensor, infrared illumination lamp and focus adjusting mechanism respectively.
Control circuit in the said apparatus comprises position detecting module, acquisition control module, image processing module and total control module; Described position detecting module collects the digital signal that range sensor returns, whether judge has the target of detection to exist in the detected scope, and will judge that signal sends into total control module, acquisition control module is controlled infrared illumination lamp and focus adjusting mechanism according to the signal of total control module, to obtain high quality image, image processing module is according to the signals collecting of the total control module image from image collector, and stores and subsequent treatment.Three modules link under the control of top control module, finish the automatic collection of iris image.
The advantage of the open iris image automatic acquisition device of the present invention's design is: one, automatically the user who occurs in the working range is carried out the collection of iris image, and do not need operating personnel's intervention; Two, illumination system layout is simplified, and does not need that illuminator is carried out disperse and handles, and reduces cost, and illuminator is used to the part of image definition assessment simultaneously, has simplified the algorithm of image definition assessment; Three, because the workflow of collecting device has determined collecting device not need the residing exact position of user, therefore, range sensor, focus adjusting mechanism etc. need not the position is measured accurately and controlled, can reduce hardware cost greatly, and simplify control circuit as fixed collecting device.
Description of drawings
Fig. 1 is the structural representation of the open iris image automatic acquisition device that proposes of the present invention.
Fig. 2 is the module frame chart of control circuit in the device that designs of the present invention.
Fig. 3 is the iris image that utilizes device of the present invention to gather, and wherein, the image position of infrared illumination lamp is in the central authorities of pupil.
Among Fig. 1, the 1st, image acquisition device, the 2nd, camera lens, the 3rd, range sensor, the 4th, infrared illumination lamp, the 5th, focus adjusting mechanism, the 6th, back up pad, the 7th, control circuit, the 8th, the residing position of human eye.
Embodiment
The open iris image automatic acquisition device of the present invention's design, its structure comprises image acquisition device 1, camera lens 2, range sensor 3, infrared illumination lamp 4, focus adjusting mechanism 5 and control circuit 7 as shown in Figure 1.Camera lens 2 and the coaxial installation of image acquisition 1 device, camera lens is fixed on the back up pad 6, and focus adjusting mechanism 5 is sleeved on the camera lens 2.Range sensor 3 and infrared illumination lamp 4 are installed on the back up pad 6, and infrared illumination lamp 4 is along the circumference uniform distribution of camera lens 2 cylindricals.Control circuit 7 links with image collector, range sensor, infrared illumination lamp and focus adjusting mechanism respectively.
Control circuit in the said apparatus, its module frame chart comprise position detecting module, acquisition control module, image processing module and total control module as shown in Figure 2.Position detecting module collects the digital signal that range sensor returns, whether judge has the target of detection to exist in the detected scope, and will judge that signal sends into total control module, acquisition control module is controlled infrared illumination lamp and focus adjusting mechanism according to the signal of total control module, to obtain high quality image, image processing module is according to the signals collecting of the total control module image from image collector, and stores and subsequent treatment.Three modules link under the control of top control module, finish the automatic collection of iris image.In the resulting image of image acquisition device, the image position of infrared illumination lamp is in the middle of pupil, and the position that the infrared illumination lamp is laid guarantees that the picture of infrared lamp has same sharpness with iris image.
Position detecting module in the said apparatus and acquisition control module are adopted the programmable logic device (PLD) that all adopts ALTERA, and image processing module is adopted the C5000 series digit signal processing chip of making TI, and top control module adopts the microcontroller chip of Cypress.
Claims (2)
1, a kind of open iris image automatic acquisition device is characterized in that this device comprises image acquisition device, camera lens, range sensor, infrared illumination lamp, focus adjusting mechanism and control circuit; The coaxial installation of described camera lens and image acquisition device, camera lens is fixed on the back up pad, and focus adjusting mechanism is enclosed within on the camera lens; Described range sensor and infrared illumination lamp are installed on the back up pad, and the infrared illumination lamp is along being close to the outer circumference uniform distribution of camera lens; Described control circuit links with image collector, image sensor, infrared illumination lamp and focus adjusting mechanism respectively.
2, device as claimed in claim 1 is characterized in that wherein said control circuit comprises position detecting module, acquisition control module, image processing module and total control module; Described position detecting module collects the digital signal that range sensor returns, whether judge has the target of detection to exist in the detected scope, and will judge that signal sends into total control module, acquisition control module is controlled infrared illumination lamp and focus adjusting mechanism according to the signal of total control module, to obtain high quality image, image processing module is according to the signals collecting of the total control module image from image collector, and stores and subsequent treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101132870A CN1545057A (en) | 2003-11-14 | 2003-11-14 | Open type iris image automatic collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101132870A CN1545057A (en) | 2003-11-14 | 2003-11-14 | Open type iris image automatic collecting device |
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| CN1545057A true CN1545057A (en) | 2004-11-10 |
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| CNA2003101132870A Pending CN1545057A (en) | 2003-11-14 | 2003-11-14 | Open type iris image automatic collecting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049288A1 (en) * | 2006-10-23 | 2008-05-02 | Ite (China) Limited | Biometric characteristic identifying device for accessing control |
| CN100433043C (en) * | 2006-04-18 | 2008-11-12 | 南京大学 | Automatic tracking invasive iris image collection device |
| CN101116609B (en) * | 2007-08-30 | 2010-06-16 | 中国科学技术大学 | Scanning type automatic zooming iris image gathering system and gathering method thereof |
| CN101499129B (en) * | 2008-01-30 | 2010-12-22 | 中国科学院自动化研究所 | Distant range iris recognition system and method |
| CN104523117A (en) * | 2014-11-19 | 2015-04-22 | 无锡悟莘科技有限公司 | Door curtain automatic control pushing device based on image collection |
| CN107257659A (en) * | 2015-02-26 | 2017-10-17 | 富士通株式会社 | Electronic equipment and living body authentication program |
| CN107491673A (en) * | 2017-07-24 | 2017-12-19 | 广东欧珀移动通信有限公司 | Biometric discrimination method and Related product |
-
2003
- 2003-11-14 CN CNA2003101132870A patent/CN1545057A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433043C (en) * | 2006-04-18 | 2008-11-12 | 南京大学 | Automatic tracking invasive iris image collection device |
| WO2008049288A1 (en) * | 2006-10-23 | 2008-05-02 | Ite (China) Limited | Biometric characteristic identifying device for accessing control |
| CN101116609B (en) * | 2007-08-30 | 2010-06-16 | 中国科学技术大学 | Scanning type automatic zooming iris image gathering system and gathering method thereof |
| CN101499129B (en) * | 2008-01-30 | 2010-12-22 | 中国科学院自动化研究所 | Distant range iris recognition system and method |
| CN104523117A (en) * | 2014-11-19 | 2015-04-22 | 无锡悟莘科技有限公司 | Door curtain automatic control pushing device based on image collection |
| CN107257659A (en) * | 2015-02-26 | 2017-10-17 | 富士通株式会社 | Electronic equipment and living body authentication program |
| CN107491673A (en) * | 2017-07-24 | 2017-12-19 | 广东欧珀移动通信有限公司 | Biometric discrimination method and Related product |
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