CN101051349B - Multiple iris collecting device using active vision feedback - Google Patents
Multiple iris collecting device using active vision feedback Download PDFInfo
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Abstract
A multi-eye iris collection device applying active vision feedback consists of collection unit formed by one set of optical lens and image collection chip as well as used for collecting iris information of user, illumination unit formed by one or multiple illumination component being able to radiate energy outwards and used for combining with or separating from said collection unit, feed back unit formed by image display component with display region being divided into two sections and used for separately displaying image of user two eye in order to let user regulate position of two eyes according to image displayed in said displaying region.
Description
Technical field
Patent of the present invention belongs to field of optical device technology and electric equipment field, relates in particular to the iris capturing equipment that a kind of user's of utilization self feed back is cooperated with on one's own initiative.
Background technology
Iris recognition technology is current a kind of identity recognizing technology commonly used, and the first step of its work is exactly obtaining of iris image, also is the step of comparison difficulty simultaneously, needs the integrated application of light, mechanical, electrical technology.Because the special nature of iris: area little (the about 11mm of mean diameter), different ethnic group color distortions are big, and general image capture method can't be shot the iris image that can be used for discerning.Iris recognition must adopt bigger camera lens of magnification and initiatively illumination.Westerner's iris color is more shallow, visible illumination just can, and Asians's iris color is darker, must adopt infrared illumination just can obtain distinct image.
The iris image obtains equipment and is divided into contact and contactless two kinds.Initial equipment is contact, mainly comprises initiatively illumination, camera lens and annex, and imager chip etc., not necessarily have feedback assembly.The contact acquisition system generally adopts the shell of the closed cavity of tubular as collecting device, with isolated environment light.In tubular cavity rear end cameras with fixed focus is installed, visible light is installed in the inside of tubular cavity or/and infrared light supply.When gathering iris image, eyes of user abuts against the cavity front end, initiatively triggers the collection button imaging of camera.The advantage of this contact system is guiding eyes aiming than being easier to, and illumination designs fairly simple, is not easy to be subjected to the influence of external environment light.But there is inborn weakness in this collecting device, and promptly each collection all needs the user to contact with collecting device, and the contact collection has brought the hidden danger of health aspect simultaneously.
In order to solve the problem of contact, contactless iris capturing equipment has appearred, by initiatively illumination, feedback assembly, camera lens and annex, and the first-class formation of making a video recording, this moment, user distance iris capturing equipment had certain distance, as 25cm or farther, when equipment has subscriber station before equipment by range finder module or graphical analysis judgement, start working, perhaps equipment is just worked always.Equipment judges in the image that collects whether iris is arranged when work, and points out the user to cooperate iris capturing, behind the satisfied image of acquisition, the iris in the image is carried out feature extraction and comparison, thereby finish the identification of user identity.And iris capturing equipment develops into the equipment of gathering two eyes simultaneously from the equipment of initial single eyes of collection.Owing to be the distant range iris collection, and the area of human eye iris is less, harvester must adopt the bigger camera lens of magnification could obtain can be used in the iris image of identification, make that the camera acquisition visual angle is less, the user must make eyes be positioned on the certain location, this position is positioned at the field depth of video camera, the energy blur-free imaging, and be in the effective lighting scope.It is unusual difficulty that user cooperating equipment under without any the situation of auxiliary alignment methods is gathered iris image.Therefore various feedback assemblys occurred on the iris capturing equipment, the guiding user realizes aiming at.
Feedback assembly is normally used to have audio feedback or/and visual feedback.Audio feedback refers to voice suggestion that the user sends according to equipment and adjusts posture and the position of oneself, as equipment can point out " more forward, more backward, more left, more to the right ".Audio feedback be by equipment according to adopted at that time information such as image the user is carried out prompting initiatively.And being thing that the user sees according to oneself, visual feedback adjusts oneself position.People have added feedback devices such as mirror on iris capturing equipment, help user's realization aligning up and down in every way, in the reflective mirror of iris recognition equipment, see two eyes of oneself simultaneously as the iris recognition equipment requirements user of Panasonic, move the pilot lamp that also has the guiding user to move on the equipment then all around by the voice suggestion user.The iris recognition equipment of LG such as LG3000 (monocular equipment) require the user to watch minute surface attentively, the feasible iris that can in the black line frame of minute surface, see oneself, LG4000 (binocular iris recognition equipment) then requires the user to see the eyes of oneself in minute surface, and a luminous point that makes minute surface transmit later is arranged in the place between the eyebrows position of own mirror eyes.The product of other companies of market, as Iritech, OKI etc. all adopt similar design.The feedback device assisted user of the similar mirror of this employing aim at we be called passive visual feedback, because the user directly aims at according to oneself picture of reflection, and the user has different being accustomed to eye, different major-minor eyes can cause user oneself to think having aimed at but in fact gathers phenomenon less than suitable image.Iris recognition product on the market all is the equipment that adopts this passive vision feedback method at present.
Feedback initiatively camera acquisition to content feed back to the user with the form of image, the user can adjust the position of self as looking in the mirror, the passive vision feedback of front face is different, that the user sees is exactly the result who gathers, alleviated the influence with eye custom or the like, alignment result has improved many than the iris recognition equipment that adopts the passive mode visual feedback.But existing active adjustment mode all is at simple eye iris recognition technology, the user is with an eye alignment, slanting head and unconscious possibly, and because just may form various angles on two canthus physiology of each one eyes with level, whether be slanting head, thereby cause problems such as alignment difficulties information is inaccurate according to the image of eyes if can't differentiate.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of binocular iris capturing equipment that adopts the active vision feedback, this equipment comprises:
Collecting unit comprises at least one cover optical lens and image acquisition chip, and its output signal is transferred to main frame, is used to gather user's iris information;
Lighting unit is made up of infrared LED array, and its controllable intensity is used for user's binocular is shone;
Range cells is made up of at least one group of range finder module, measure user's binocular and the distance between the collecting device, be used to judge whether the user stands in the permission identified range, if, then collecting unit is started working, and the user's binocular image that collects is presented on the feedback unit, otherwise on the feedback unit with display reminding information, the prompting user moves forward and backward, and the guiding user enters within the effective range that allows identification;
Feedback unit is mainly by forming over against the LCD display of user's binocular, its display screen is divided into upper and lower viewing area, under the driving of the video card of described main frame, described left and right order of viewing area explicit user down and corresponding face, the described viewing area of going up shows extra interior perhaps prompt text, and the guiding user carries out the adjustment of position, upper and lower, left and right and the moving of front and back position of binocular; The color of described display screen displaying contents and Dimmable, the pupil size that makes the user basically identical during with registration improving the accuracy of iris recognition, and can be used for live body and detects, and avoids artificial eye.
The optical axis intersection of described lighting unit, feedback unit and collecting unit is in feedback unit the place ahead 20～30cm.
Collecting unit is made of optical lens (group), annex (as infrared fileter) and image collection chip (group), can comprise that electronic part also can not comprise electronic part, can use tight shot also can use the camera lens of zoom lens or other types.Lighting unit is made of the outwards device or the equipment of emittance, may be one or more parts, may with collecting unit directly combine also may with the collecting unit relative separation.Can but be not limited to LED, bulbs etc. also are not limited only to infraredly, also may be visible light, ultraviolet ray etc.Feedback unit comprises by constituting to the device or the equipment of user's display image, can also can be LCD for a plurality of for one, CRT, led array, plasma display, Projection Display, the holographic demonstration or other present unlisted display devices.Can comprise the voice feedback part in the feedback unit, also can comprise the pilot lamp feedback fraction, but be not limited only to these feedback fractions.Range cells, but can use the infrared distance measurement module, the supersonic sounding module for an independent physical location, the range finder module of laser ranging module or other types is formed, also can be by the distance of software according to estimation user of the changing features in the images acquired and equipment room.
The present invention is owing to adopt the binocular iris authentication system of active vision feedback, alignment result and ease for use are a a progressive step again, with respect to the monocular system that adopts the active vision feedback following improvement is arranged: can support binocular identification simultaneously, more more convenient than the monocular system use, speed is faster; Biocular systems can be avoided the influence of user with eye custom, because use two eyes can keep substantially looking squarely simultaneously, thereby has avoided problem such as automatic torticollis.And the angle that can come correcting image according to the canthus of two eyes, thereby improve the accuracy and the recognition speed of identification greatly.Because feed back two eyes simultaneously, even people's face information, help the user to aim at.Because people's eye sizes is smaller, therefore the scope that is exclusively used in the camera acquisition of gathering iris image is less relatively, in monocular system self feed back system, only utilize this scope to carry out to feel inconvenient, and more information is bigger for aiming at suggesting effect to punctual user.
All binocular equipment relatively at present, the present invention has following improvement: existing binocular equipment all is to adopt the feedback device of similar mirror to aim at, and can cause user oneself to think having aimed at but in fact gathers phenomenon less than suitable image.And equipment of the present invention directly feeds back two eyes that acquisition system collects, even people's face information gives the user, helps the user to aim at, and alignment speed is existing more than 3 to 5 times of binocular equipment.In the present invention, our feedback unit can send controlled light simultaneously and regulate user's pupil size.Feedback unit not only can be pointed out the position of eyes of user, because the user watches feedback unit attentively when the equipment of use, the variation meeting of the light of feedback unit and brightness directly stimulates the user to make user's pupil change, and the visible light that sends different brightness under the control of software comes active adjustment user's pupil size.Can also can be used for artificial eye on the other hand and detect the iris of refusing to forge so that identification is more accurate on the one hand, just can't be such as the pupil size of artificial eye automatically with the light adjustment.
Description of drawings
Fig. 1 shows the synoptic diagram of the binocular iris capturing equipment of employing active vision feedback according to an embodiment of the invention;
Fig. 2 shows the view of feedback unit according to an embodiment of the invention;
Fig. 3 shows another view of feedback unit according to an embodiment of the invention;
Fig. 4 shows another view of feedback unit according to an embodiment of the invention;
Fig. 5 shows the synoptic diagram of the binocular iris capturing equipment of employing active vision feedback according to another embodiment of the invention;
Fig. 6 shows the view of feedback unit according to another embodiment of the invention;
Fig. 7 shows the synoptic diagram of binocular iris capturing equipment of the employing active vision feedback of an alternative embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings, describe preferred implementation of the present invention in detail.
Embodiment 1:
Fig. 1 is the synoptic diagram of first embodiment of the invention.With reference to figure 1, lighting unit 1 is positioned at around the collecting unit 2 or the next door, be used to illuminate iris 3, because lighting unit 1 has certain emission angle, feedback unit 4 has certain viewing angle, and collecting unit 2 also has certain acquisition angles and field depth, adjusts lighting unit 1, collecting unit 2 and feedback unit 4 optical axises, make can one with equipment have can satisfy in the space (being called discernible spatial volume) of certain distance below requirement:
1, the user can clearly see feedback unit 4 feedback content displayed in this scope,
2, lighting unit 1 can illuminate user's iris 3 with suitable energy,
3, the clear client iris image that collects of collecting unit 2 energy obtains meeting the image of gathering requirement.
Equipment uses 1 pair of client iris 3 of lighting unit to throw light on when taking user's iris image, will directly give the user content feed that collects on feedback unit 4, and guides user positions.Simultaneously also can gather more information, as the eye of explicit user not only, also the face of explicit user simultaneously further makes things convenient for the user to aim at.The image that shows on the feedback unit 4 can be the original image that does not pass through Flame Image Process, also can be the image that obtains through Flame Image Process.Feedback unit 4 may be sounded and be pointed out the user simultaneously.
Because iris recognition can only be finished at discernible spatial volume, user up and down position after using the active vision feedback assembly is very easy to aim at, but front and back position is not having to be difficult to determine that the employing range cells helps the user to locate this situation in our system under the situation of clear and definite object of reference.When range cells 5 feedback distances are improper, can notify the user to move forward and backward by feedback unit 4 (image/pilot lamp/voice etc.), also the image blur that feedback unit 4 can be shown makes user's cooperation initiatively move forward and backward.Several different methods is used in combination to reach ease for use preferably.
Software can be controlled the visible light intensity that sends by feedback unit 4, because human eye is to the visible light sensitivity, pupil can be regulated according to visible light illumination, pupil size in the time of can adjusting pupil near registration when discerning on the one hand according to this characteristic reduces pupil and changes the influence that causes the iris texture nonlinearities change.On the other hand, also can carry out living body iris and detect, avoid iris forgeries such as artificial eye according to the variation of pupil.Feedback unit 4 sends visible light intensity can be by the brightness of display part in the Control and Feedback unit 4, or/and the pilot lamp part or/and other parts realize.
Among Fig. 1, collecting unit 2 is positioned at feedback unit 4 belows, and collecting unit 2 is felt the infrared CCD camera by tight shot, and infrared fileter is formed.The tight shot focal length is 30mm, and object distance is 30cm.The CCD camera adopts N system 600 line sense infrared cameras, and the vision signal of output is transferred to main frame by video frequency collection card.Feedback unit 4 is the small LCD display, and resolution is 640 * 480, over against the user.LCD display is driven by an independent video card by main frame.Lighting unit 1 is positioned at feedback unit 4 both sides, and lighting unit 1 is made up of infrared LED array, and the intensity of LED lamp can be controlled by software, and the infrared illumination that lighting unit 1 sends can shine user's eyes.Range cells 5 is made up of the infrared distance measurement module, is positioned at the below of collecting unit 2.The optical axis intersection of lighting unit 1, feedback unit 4 and collecting unit 2 is in the place of feedback unit 4 the place aheads 20～30cm.
Concrete workflow is as follows:. when not having the user before the iris capturing device, judge that by range cells 5 the place ahead is unmanned, the iris capturing device is not worked.Before the user goes to the iris capturing device, range finder module judges that there is the people in the place ahead, the iris capturing device is started working, iris capturing device control lighting unit 1 sends infrared light, the iris capturing device judges according to the result of infrared distance measurement unit 5 whether the user stands in the permission identified range, if then begin images acquired, otherwise main frame moves forward and backward (as show " asking forward/backward to move " on LCD) by feedback unit 4 prompting users.When the user is allowing in the identified range, main frame shows the content that the iris capturing device collects on the LCD of feedback unit 4, as shown in Figure 2, the lower part of LCD is divided into two zones, be respectively applied for the left eye and the right eye of explicit user, the top of LCD can also be used for face or other prompt texts of explicit user.The user can see that the lower part of screen observes two eyes of oneself and the counterpart of face, and the user can adjust oneself position up and down according to the content of screen display, makes oneself complete the appearing in the screen of eyes.The main frame judgement collects iris image quality, controls the light intensity of infrared illumination simultaneously, makes that illumination is the most suitable.
Here, the user faces the lcd screen of feedback unit 4, and collecting unit 2 is gathered user's iris image from the below of feedback unit 4.Lighting unit 1 throws light on from both sides.The lcd screen example is shown in Fig. 2-4, and the user can be moved to the left automatically as seeing similar Fig. 2, can move toward upper right automatically if see Fig. 3, sees that similar Fig. 4 understands automatic rotary head.Algorithm also can carry out angularity correction according to the eyes canthus simultaneously.
The also color and the brightness of the displaying contents of LCD the first half of Control and Feedback unit 4 of main frame makes user's pupil size change simultaneously, carries out live body and detects.And in this process, finish the affirmation of user identity according to the iris image that collects the user.
Because can obtain the image of two eyes simultaneously, the user generally can keep looking squarely, even the phenomenon that the user turns one's head takes place, algorithm also can come the angle of correcting image according to the canthus of two eyes, thereby improves the accuracy and the recognition speed of identification greatly.After iris recognition is finished, on the LCD of feedback unit 4, demonstrate recognition result.
Embodiment 2:
Fig. 5 shows the synoptic diagram of an alternative embodiment of the invention.As shown in Figure 5, collecting unit 2 is over against user's eyes, and collecting unit 2 is felt the infrared CCD camera by tight shot, and infrared fileter and semi-transparent semi-reflecting lens 6 are formed.The tight shot focal length is 30mm, and object distance is 30cm.The CCD camera adopts N system 600 line sense infrared cameras, and the vision signal of output is transferred to main frame by video frequency collection card.Semi-transparent semi-reflecting lens 6 can see through infrared light, and reflects all visible lights.The image of eyes of user can be collected by semi-transparent semi-reflecting lens 6, and feedback unit 4 content displayed can not influence the image of collection.Feedback unit 4 is a Small-sized C RT display, and resolution is 640 * 480, becomes an angle of 90 degrees with user's direction of observation.The displaying contents of feedback unit 4 is given the user by semi-transparent semi-reflecting lens 6 reflections.Lighting unit 1 is positioned at collecting unit 2 both sides, and lighting unit 1 is made up of infrared LED array, and illumination intensity is unadjustable.The infrared illumination that lighting unit 1 sends can shine user's eyes, and range cells 5 is made up of the infrared distance measurement module, is positioned at the below (not shown) of collecting unit 2.The optical axis intersection of lighting unit 1, feedback unit 4 and collecting unit 2 is in the place of feedback unit 4 the place aheads 20～30cm.
Concrete workflow is as follows: when not having the user before the iris capturing device, judge that by range cells 5 the place ahead is unmanned, the iris capturing device is not worked.Before the user went to the iris capturing device, range cells 5 judged that there is the people in the place ahead, and the iris capturing device is started working.Iris capturing device control lighting unit 1 sends infrared light, illuminates user's eyes.The iris capturing device judges according to the result of infrared distance measurement unit 5 whether the user stands in the permission identified range, if then begin images acquired, otherwise main frame moves forward and backward (as show " asking forward/backward to move " on CRT) by feedback unit 4 prompting users.When the user is allowing in the identified range, main frame shows with the content that collects the iris capturing device on the CRT of feedback unit 4, the user can see that the centre of screen observes two eyes of oneself and the counterpart of face over against the position of eyes, the user can adjust oneself position up and down according to the content of screen display, makes oneself complete the appearing in the screen of eyes.The also upward color and the brightness of the displaying contents of other parts of CRT of Control and Feedback unit 4 of main frame simultaneously makes user's pupil size change, and carries out live body and detects.And in this process, finish the affirmation of user identity according to the iris image that collects the user.After iris recognition is finished, on the CRT of feedback unit 4, demonstrate recognition result.
Here, the user faces the camera lens of collecting unit 2, observes the user's that collecting unit 2 obtains iris image simultaneously from semi-transparent semi-reflecting lens.Lighting unit 1 throws light on from both sides.At this time the images category seen of user is like shown in Figure 6.
Embodiment 3:
Fig. 7 shows the synoptic diagram of an alternative embodiment of the invention.In this embodiment, only need once overlapping the iris information that optical lens and image acquisition chip can be gathered two eyes.As shown in Figure 7, collecting unit 2 is felt infrared CMOS camera by tight shot, infrared fileter, and reflective mirror 7 and semi-transparent semi-reflecting lens 6 are formed, and can see through infrared light by the semi-transparent semi-reflecting lens in the collecting unit 26, and reflect all visible lights.The image projection of eyes of user makes collecting unit 2 realize the collection user eyes of timesharing to reflective mirror 7 by the rotation of controlling reflective mirror 7, and under the fast rotational of reflective mirror 7, system acquisition speed can reach every eyes per second 5～10 frames.
Feedback unit 4 is a Small-sized C RT display, and resolution is 640 * 480, becomes an angle of 90 degrees with user's direction of observation.The displaying contents of feedback unit 4 is given the user by semi-transparent semi-reflecting lens 6 reflections.Lighting unit 1 is positioned at collecting unit 2 both sides, and lighting unit 1 is formed the illumination intensity scalable by infrared LED array.The infrared illumination that lighting unit 1 sends can shine user's eyes, does not have range finder module physically in the present embodiment, and by the distance between algorithm estimating user and harvester.The optical axis intersection of lighting unit 1, feedback unit 4 and collecting unit 2 is in the place of feedback unit 4 the place aheads 30～40cm.
Concrete workflow is as follows: when not having the user before the iris capturing device, judge that by images acquired the place ahead is unmanned, the iris capturing device is not worked.Before the user goes to the iris capturing device, judge that by image there is the people in the place ahead, the iris capturing device is started working.Iris capturing device control lighting unit 1 sends infrared light, illuminates user's eyes.The iris capturing device judges according to the result of infrared distance measurement unit 5 whether the user stands in the permission identified range, if then begin the image of collection is carried out quality judgement and analysis, otherwise main frame moves forward and backward (as show " asking forward/backward to move " on CRT) by feedback unit 4 prompting users.When the user is allowing in the identified range, main frame shows the content that the iris capturing device collects on the CRT of feedback unit 4, the user can see that the centre of screen observes two eyes of oneself and the counterpart of face over against the position of eyes, the user can adjust oneself position up and down according to the content of screen display, makes oneself complete the appearing in the screen of eyes.Main frame is controlled the light intensity of infrared illumination unit 1 simultaneously, makes that illumination is the most suitable.The also upward color and the brightness of the displaying contents of other parts of CRT of Control and Feedback unit 4 of main frame simultaneously makes user's pupil size change, and carries out live body and detects.And in this process, finish the affirmation of user identity according to the iris image that collects the user.After iris recognition is finished, on the CRT of feedback unit 4, demonstrate recognition result.
Here, user's oneself iris image of observing from semi-transparent semi-reflecting lens 6 that collecting unit 2 obtains.Lighting unit 1 throws light on from both sides.At this time the image seen of user is also similar shown in Figure 6.
In above-mentioned several embodiments, change tight shot into zoom lens, illumination section can be carried out the angle rotation according to the customer location that calculates automatically simultaneously, and the diverse location of range finder module or the combination of different distance-finding methods etc. can be formed new embodiment.Those skilled in the art can also carry out various changes and distortion to the present invention and not break away from the spirit and scope of the present invention.
Claims (4)
1. binocular iris capturing equipment that adopts active vision feedback comprises:
Collecting unit, it comprises at least one cover optical lens and image acquisition chip, its output signal is transferred to main frame, is used to gather user's iris information;
Lighting unit, it is made up of infrared LED array, and its illumination intensity is controlled, is used for user's binocular is shone;
Range cells, it is made up of at least one group of range finder module, measure the distance between user and the collecting device, be used to judge whether the user stands in the permission identified range, if then collecting unit is started working, and the user's binocular image that collects is presented on the feedback unit, otherwise with display reminding information, the prompting user moves forward and backward on the feedback unit, and the guiding user enters and allows within the identified range;
Feedback unit, it is a LCD display, its display screen is divided into upper and lower viewing area, the counterpart of described left and right order of viewing area explicit user down and face, the described viewing area display reminding literal of going up, the guiding user carries out the adjustment of position, upper and lower, left and right and the moving of front and back position of binocular.
2. the binocular iris capturing equipment of employing active vision feedback according to claim 1 is characterized in that:
The optical axis intersection of described lighting unit, feedback unit and collecting unit is in 20～30cm place, feedback unit the place ahead.
3. the binocular iris capturing equipment of employing active vision feedback according to claim 1 is characterized in that:
Described feedback unit also comprises pilot lamp and/or voice suggestion.
4. the binocular iris capturing equipment of employing active vision feedback according to claim 3 is characterized in that:
The brightness of described display screen is controlled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100993885A CN101051349B (en) | 2007-05-18 | 2007-05-18 | Multiple iris collecting device using active vision feedback |
| PCT/CN2008/001161 WO2008141535A1 (en) | 2007-05-18 | 2008-06-16 | Double eyes' images acquisition apparatus using an active vision feedback mode for iris recognition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100993885A CN101051349B (en) | 2007-05-18 | 2007-05-18 | Multiple iris collecting device using active vision feedback |
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| CN101051349A CN101051349A (en) | 2007-10-10 |
| CN101051349B true CN101051349B (en) | 2010-10-13 |
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| CN2007100993885A Active CN101051349B (en) | 2007-05-18 | 2007-05-18 | Multiple iris collecting device using active vision feedback |
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| WO (1) | WO2008141535A1 (en) |
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| CN2672768Y (en) * | 2003-12-07 | 2005-01-19 | 倪蔚民 | Iris optical imaging device |
| CN1892676A (en) * | 2005-06-03 | 2007-01-10 | 沈洪泉 | Apparatus and method for face/iris combination optical imagine |
| CN1936920A (en) * | 2005-09-23 | 2007-03-28 | 乐金电子（昆山）电脑有限公司 | Mobile iris identifying system and method |
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