CN107392185A - A kind of ultrathin finger vein identification device and recognition methods - Google Patents

A kind of ultrathin finger vein identification device and recognition methods Download PDF

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Publication number
CN107392185A
CN107392185A CN201710752961.1A CN201710752961A CN107392185A CN 107392185 A CN107392185 A CN 107392185A CN 201710752961 A CN201710752961 A CN 201710752961A CN 107392185 A CN107392185 A CN 107392185A
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China
Prior art keywords
finger
light source
angle
vein
camera module
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Withdrawn
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CN201710752961.1A
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Chinese (zh)
Inventor
陈建昌
房雪雁
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Guangzhou Micro Shield Polytron Technologies Inc
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Guangzhou Micro Shield Polytron Technologies Inc
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Priority to CN201710752961.1A priority Critical patent/CN107392185A/en
Publication of CN107392185A publication Critical patent/CN107392185A/en
Priority to PCT/CN2018/000261 priority patent/WO2019041712A1/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/14—Vascular patterns

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Image Input (AREA)
  • Collating Specific Patterns (AREA)

Abstract

The invention discloses a kind of ultrathin finger vein identification device, including light source, finger positioner, core control process device and camera module, light source includes near-infrared light source and visible light source, light source is arranged at the upside of finger positioner and light source direction direction refers to the back of the body, camera module is arranged at the downside of finger positioner and images direction towards finger pulp, wherein, light path between light source and finger and between camera module and finger, which is respectively positioned on, to be referred to outside vein identification device, and visible light source can instruct user's correct placement finger in infrared light supply light path, so as to obtain clearly finger vena imaging effect.The most light paths of the present invention are placed in outside device, and all outside apparatus structure, device can be done ultra-thin light path between camera module and finger, between light source and finger.

Description

A kind of ultrathin finger vein identification device and recognition methods
Technical field
The present invention relates to a kind of identification device, more particularly to a kind of ultrathin finger vein identification device.
Background technology
The principle of finger vein identification technology is infrared light supply irradiation finger, and the hemoglobin absorption in finger vena blood is near Infrared, camera module can collect the vein image of finger interior accordingly, be used by working process finger venous image Family finger vein features data, the technology of user is identified finally by the matching operation between finger vein features data.
Finger vein identification technology is to obtain initial data based on optical principle, naturally gathers around and has the dimensions, particularly When the finger areas for requiring collection is long, equipment volume can be bigger.Existing finger vein identification device volume ratio compared with Greatly, and finger position can not be adjusted it is unfavorable for being used in and volume is had certain requirements application scenario, such as door lock, safety cabinet, hand Machine and other mobile terminals etc..
The content of the invention
The present invention is in order to solve the defects of prior art is present, there is provided a kind of simple in construction, easy to operate, quick, volume The ultrathin finger vein identification device of small, adjustable finger putting position.
The present invention is achieved through the following technical solutions：
A kind of ultrathin finger vein identification device, including light source, finger positioner, core control process device and take the photograph As module, light source includes near-infrared light source and visible light source, and light source is arranged at the upside of finger positioner and light source direction court To be carried on the back to referring to, camera module is arranged at the downside of finger positioner and shooting direction is towards finger pulp, wherein, between light source and finger And the light path between camera module and finger is respectively positioned on and referred to outside vein identification device, and visible light source can instruct user correctly to put Finger is put in infrared light supply light path, so as to obtain clearly finger vena imaging effect.
The finger positioner includes finger guide channel and finger position detection sensor.
Optical filter is provided between the camera module and finger or in camera module.
A kind of ultrathin finger vein identification method, comprises the following steps：
S1, finger position detection sensor detection finger position；
S2, open near-infrared light source and visible light source；
S3, camera module collection finger venous image；
S4, core control process device are by calculating skew of the finger in imaging plane；Judgment step S4 offset is It is no to be less than threshold values, it is that then core control process device utilizes the finger vein features data, carries out finger vena identification；Otherwise it is anti- Host computer is fed to, host computer is guided for putting finger, enters S3 steps.
In the step S3 camera module according to user be accustomed to setting delay time or camera module constantly gather image, Core control process device is by judging the gray scale of image, until gradation of image properly just confirms that the image of collection is finger vena Image, carry out in next step.
Core control process device described in the step S3 can be by finger edge fitting into finger boundary straight line L1、L3With Finger centre line L1, it is correct to judge that finger is placed in the following manner：Finger boundary straight line L can be fitted1、L3, and not with image side The right boundary on boundary intersects；Finger centre line L can be fitted2, and finger centre line L2With picture centre line L offset distances and angle In the range of appropriate threshold；Otherwise the position of host computer, host computer guiding user or so adjustment finger is fed back to, enters S3 steps Suddenly.
Whether the offset of Judge plane is less than threshold values in the step S4, is then to enter next step S5, core control Processing unit obtains finger actual placement and design attitude by calculating effective finger vena section length in vein image Angle value, angle is judged whether in threshold range, be that then core control process device utilizes finger venous image generation hand Refer to vein pattern data, carry out finger vena identification；Otherwise host computer is fed back to, is lifted on host computer guiding user or decentralization refers to Abdomen, enter S3 steps.
The step S5 is finger and the angle of reference planes specifically, set angle α as design load, it is corresponding effectively Finger vena section length is L4, when finger is placed, effective vein section length that camera module obtains finger is L5, pass through vein figure Effective section length L as in5, finger and reference planes angle beta is calculated, compares β and α value difference, judges whether difference is small It is that then using finger venous image generation finger vein features data, it is quiet to carry out finger for core control process device in threshold values Arteries and veins identifies, otherwise feeds back to host computer guiding client's correct placement finger, enters S3 steps
Angle is judged in the step S5 whether in threshold range, is then to enter next step S6, core control process Device judges finger border angle whether in threshold range, is that then core control process fills by calculating finger border angle Put using finger venous image generation finger vein features data, carry out finger vena identification, otherwise feed back to upper power traction Lead and finger pulp is lifted or transferred on user, enter S3 steps.
The step S6 is specifically, by finger edge fitting into finger boundary straight line L1、L3, finger boundary straight line L1With hand Refer to boundary straight line L3Between angle be defined as finger border angle, when finger border angle is in threshold values, finger place just Really, as finger border L1、L3Intersect at Fingers butt and angle is more than threshold values θ1When, Fingers root is too upper to be lifted, and is placed wrong By mistake；As finger border L1、L3Intersect at Fingers tip and angle is more than threshold values θ2When, Fingers root too pushes, and places wrong By mistake.
Beneficial effect of the present invention：A kind of ultrathin finger vein identification device, including light source, finger positioner, core Control process device and camera module, light source include near-infrared light source and visible light source, and light source is arranged at finger positioner Towards referring to the back of the body, camera module is arranged at the downside of finger positioner and images direction towards finger pulp for upside and light source direction, its In, the light path between light source and finger and between camera module and finger, which is respectively positioned on, to be referred to outside vein identification device, and visible light source User's correct placement finger can be instructed in infrared light supply light path, so as to obtain clearly finger vena imaging effect.This hair Bright most light paths are placed in outside device, between camera module and finger, between light source and finger light path all in apparatus structure Outside, device can be done ultra-thin.
Brief description of the drawings
Fig. 1 is a kind of ultrathin finger vein identification device structural representation one of the present invention；
Fig. 2 is a kind of ultrathin finger vein identification device structural representation two of the present invention；
Fig. 3 is a kind of ultrathin finger vein identification device structural representation three of the present invention；
Fig. 4 is a kind of visible ray position view of ultrathin finger vein identification device of the present invention；
Fig. 5 is a kind of flow chart of ultrathin finger vein identification device regulation skew of the present invention；
Fig. 6 is a kind of vein figure of ultrathin finger vein identification device regulation skew of the present invention；
Fig. 7 is the flow chart that a kind of ultrathin finger vein identification device of the present invention adjusts angle；
Fig. 8 is the vein figure that a kind of ultrathin finger vein identification device of the present invention adjusts angle；
Fig. 9 is the flow chart that a kind of ultrathin finger vein identification device of the present invention adjusts finger border angle；
Figure 10 is that a kind of ultrathin finger vein identification device of the present invention adjusts one of vein figure of finger border angle；
Figure 11 is the two of the vein figure that a kind of ultrathin finger vein identification device of the present invention adjusts finger border angle；
Figure 12 is the three of the vein figure that a kind of ultrathin finger vein identification device of the present invention adjusts finger border angle.
Wherein：1- finger vein identification devices, 2- light sources, 3- guide channels, 4- finger position detection sensors, 5- core controls Processing module processed, 6- camera modules, 7- optical filters, 8- fingers, 9- visible light sources, 10- picture centre line L, 11- fingers border are straight Line L1, 12- finger centre lines L2, 13- finger boundary straight lines L3, 14- image boundaries, 15- near-infrared light sources, 16- reference planes.
Embodiment
A kind of ultrathin finger vein identification device 1, including light source 2, finger positioner, core control process module 5 With camera module 6, finger positioner includes guide channel 3 and finger position detection sensor 4.Light source 2 is arranged at finger positioning The side of device and light source direction direction refer to the back of the body, and camera module 6 is arranged at the opposite side of finger positioner and shooting direction court To finger pulp, wherein, the light path between light source 2 and finger 8 and between camera module 6 and finger 8 is respectively positioned on finger vena identification dress Put outer.All outside apparatus structure, device can be done super light path between camera module 6 and finger 8, between light source 2 and finger 8 It is thin.
Light source 2：Light source 2 can also include visible light source in addition to comprising infrared light supply, and infrared light supply is near-infrared light source 15, Near-infrared light source 15 is used to irradiate finger, is imaged finger vena.Due near infrared light, naked eyes are invisible, and user can not judge Whether finger is placed in infrared light supply light path, aids in that user's correct placement finger can be instructed in infrared light supply with visible light source In light path, so as to obtain clearly finger vena imaging effect.
Camera module 6：The camera assembly of finger venous image is gathered, band logical filter can be integrated in camera module 6 if necessary Mating plate 7, the light beyond cutoff wavelength 700-1000nm, to prevent the light of other wavelength through interference imaging effect.Or On camera module group lens (or interior) covering optical filter 7 (film), by visible ray etc. it is foreseeable can disturb finger vena be imaged Light.
Finger positioner：Help guides finger to be placed on design presumptive area, camera module 6 is photographed clearly Finger venous image.Finger positioner, comprising but be not limited to finger guide channel 3, finger position detection sensor 4, icon, Light, concavo-convex modeling structure.
Core control process module 5：Control light source 2, the detection/information of monitoring finger position detection sensor 4, from shooting mould The acquisition vein image data of group 6 is simultaneously processed acquisition user's finger vein pattern data to data, finally by finger Matching operation identification user between vein pattern data.Core control process module 5 is also responsible for the data communication between host computer.
Finger positioner guide channel 3 of the present invention or instruction icon guide finger fingertip are placed on the finger tip rest area of design Domain, finger position detection sensor 4 have detected finger placement, and finger position detection sensor 4 sends a signal to core control Processing module 5, core control process module 5 opens light source, and (host computer initiates finger vena identification maneuver, it is seen that light source can connect certainly Lighted to having ordered, guide user to place finger to design attitude), user can now adjust finger to design according to visible light source Optimum position, the near infrared light finger of light source 2, the diffusing reflection in finger, the hemoglobin absorption in finger vena blood are near Infrared, finger vena is on the image that camera module gathers into shadow；The hand that core control process module 5 gathers to camera module 6 Refer to vein image and be processed acquisition user's finger vein pattern data, by user's finger vein pattern data and typing Finger vein features data matched, if matching if confirm user be the logging data correspond to user, be not otherwise.
As shown in figure 4, left hand view, it is seen that light source is located among finger, and finger is placed centrally, and finger is correctly put；It is middle Figure, it is seen that light source is located on the right side of finger, finger placement to the left, needs to correct；Right part of flg, it is seen that light source is located on the left of finger, finger Placement to the right, need to correct.
As shown in figure 5, a kind of ultrathin finger vein identification method, comprises the following steps：
S1, finger position detection sensor detection finger position；
S2, open near-infrared light source and visible light source；
S3, camera module collection finger venous image；
S4, core control process module software are by calculating skew of the finger in imaging plane；Judgment step S4 skew Whether amount is less than threshold values, is that then core control process module 5 utilizes the finger vein features data, carries out finger vena identification； Otherwise host computer is fed back to, host computer is guided for putting finger, enters S3 steps.
In the step S3 camera module according to user be accustomed to setting delay time or camera module constantly gather image, Core control process module 5 is by judging the gray scale of image, until gradation of image properly just confirms that the image of collection is quiet for finger Arteries and veins image, carry out in next step.
As shown in fig. 6, core control process module 5 can be by finger edge fitting into finger boundary straight line in the step S3 L111、L313 and finger centre line L212, it is correct to judge that finger is placed in the following manner：Finger boundary straight line L can be fitted111、 L313, and the right boundary with image boundary 14 does not intersect；Finger centre line L can be fitted212, and finger centre line L212 with scheming Inconocenter line L10 offset distances and angle are in the range of appropriate threshold.Wherein, Fig. 6 A figures, finger places correct, B figures, finger Placement to the right, C figures, finger placement to the left.
As shown in fig. 7, whether the offset of Judge plane is less than threshold values in the step S4, it is then to enter next step S5, core control process module 5 are calculated by software refers to the effective finger vena section length of vein image (note：Near-infrared light source shines Penetrate area's finger vena to be imaged into shadow, non-infrared light supply irradiated region can only photograph finger pulp loss surface texture, according to finger vena Continuity, train of thought form, distinguish near-infrared light source irradiated region and non-infrared light supply irradiated region, near-infrared light source irradiation section length Regard as effective finger vena section length) angle (vertical direction) of user's finger actual placement and design attitude is obtained, Angle is judged whether in threshold range, is that then core control process module 5 utilizes finger venous image generation finger vena Characteristic, carry out finger vena identification；Otherwise host computer is fed back to, lifts or transfers finger pulp on host computer guiding user, enter To S3 steps.
As shown in figure 8, the step S5 sets angle α as design load, is finger and reference planes specifically, shown in A figures 16 angle, corresponding effectively finger vena section length is L4, shown in B figures, when finger is placed, camera module obtains having for finger It is L to imitate vein section length5, pass through effective section length L in vein image5, finger and the angle beta of reference planes 16 is calculated, than Compared with β and α value difference, judge whether difference is less than threshold values, be that then core control process module is generated using the finger venous image Finger vein features data, finger vena identification is carried out, otherwise feed back to host computer guiding client's correct placement finger, enter S3 steps.
Shown in Fig. 9, angle is judged in the step S5 whether in threshold range, is then to enter next step S6, core Control process module 4 judges that finger border angle is then core control whether in threshold range by calculating finger border angle Processing module 4 processed is carried out finger vena identification, otherwise fed back to using finger venous image generation finger vein features data Lift or decentralization finger pulp, enter S3 steps on host computer guiding user.
Shown in Figure 10, Figure 11 and Figure 12, the step S6 is specifically, by finger edge fitting into finger boundary straight line L111、L313 (place figure from figure A, B, C finger and corresponding figure a, b, c finger vena figure are understood closer to tip portion finger Border deformation is smaller, therefore to be fitted close to finger pulp loss section image when being fitted finger border)；Finger boundary straight line L111 and hand Refer to boundary straight line L3Angle between 13 is defined as finger border angle, and when finger border angle is in threshold values, finger is placed Correctly, as finger border L1、L3Intersect at Fingers butt and angle is more than threshold values θ1When, Fingers root is too upper to be lifted, and is placed wrong By mistake；As finger border L1、L3Intersect at Fingers tip and angle is more than threshold values θ2When, Fingers root too pushes, and places wrong By mistake.
The technical scheme provided above inventive embodiments is described in detail, specific case pair used herein The principle and embodiment of inventive embodiments are set forth, and the explanation of above example is only applicable to help and understands that invention is real Apply the principle of example；Meanwhile for those of ordinary skill in the art, according to inventive embodiments, in embodiment and answer With there will be changes in scope, in summary, this specification content should not be construed as the limitation to invention.

Claims (10)

  1. A kind of 1. ultrathin finger vein identification device, it is characterised in that：At light source, finger positioner, core control Manage device and camera module, light source includes near-infrared light source and visible light source, light source be arranged at the upside of finger positioner and Light source direction is towards the back of the body is referred to, and camera module is arranged at the downside of finger positioner and shooting direction is towards finger pulp, wherein, light source Light path between finger and between camera module and finger, which is respectively positioned on, to be referred to outside vein identification device, and visible light source can instruct User's correct placement finger is in infrared light supply light path, so as to obtain clearly finger vena imaging effect.
  2. A kind of 2. ultrathin finger vein identification device according to claim 1, it is characterised in that：The finger positioning dress Put including finger guide channel and finger position detection sensor.
  3. A kind of 3. ultrathin finger vein identification device according to claim 1, it is characterised in that：The camera module with Optical filter is provided between finger or in camera module.
  4. A kind of 4. ultrathin finger vein identification method, it is characterised in that：Comprise the following steps：
    S1, finger position detection sensor detection finger position；
    S2, open near-infrared light source and visible light source；
    S3, camera module collection finger venous image；
    S4, core control process device are by calculating skew of the finger in imaging plane；Whether judgment step S4 offset is small In threshold values, it is that then core control process device utilizes the finger vein features data, carries out finger vena identification；Otherwise feed back to Host computer, host computer are guided for putting finger, enter S3 steps.
  5. A kind of 5. ultrathin finger vein identification method according to claim 4, it is characterised in that：Taken the photograph in the step S3 As module according to user be accustomed to setting delay time or camera module constantly gather image, core control process device by sentencing The gray scale of disconnected image, until gradation of image properly just confirms that the image of collection is finger venous image, progress is in next step.
  6. A kind of 6. ultra-thin membranous type finger vein identification method according to claim 5, it is characterised in that：In the step S3 The core control process device can be by finger edge fitting into finger boundary straight line L1、L3With finger centre line L2, by following It is correct that mode judges that finger is placed：Finger boundary straight line L can be fitted1、L3, and do not intersect with the right boundary of image boundary；It can intend Close finger centre line L2, and finger centre line L2With picture centre line L offset distances and angle in the range of appropriate threshold；Otherwise The position of host computer, host computer guiding user or so adjustment finger is fed back to, enters S3 steps.
  7. A kind of 7. ultra-thin membranous type finger vein identification method according to claim 5, it is characterised in that：In the step S4 Whether the offset of Judge plane is less than threshold values, is, enters next step S5, core control process device by calculating vein Effective finger vena section length obtains finger actual placement and the angle value of design attitude in image, judge angle whether It is that then core control process device using finger venous image generation finger vein features data, carries out hand in threshold range Refer to hand vein recognition；Otherwise host computer is fed back to, lifts or transfers finger pulp on host computer guiding user, enter S3 steps.
  8. A kind of 8. ultrathin finger vein identification method according to claim 7, it is characterised in that：The step S5 is specific To set angle α as design load, being finger and the angle of reference planes, corresponding effectively finger vena section length is L4, finger During placement, effective vein section length that camera module obtains finger is L5, pass through effective section length L in vein image5, calculate Finger and reference planes angle beta are obtained, compares β and α value difference, judges whether difference is less than threshold values, is then core control process Device is carried out finger vena identification, is otherwise fed back to host computer using finger venous image generation finger vein features data Client's correct placement finger is guided, enters S3 steps.
  9. A kind of 9. ultrathin finger vein identification method according to claim 7, it is characterised in that：Sentence in the step S5 Whether disconnected angle is to enter next step S6, core control process device to press from both sides by calculating finger border in threshold range Angle, finger border angle is judged whether in threshold range, be that then core control process device is given birth to using the finger venous image Into finger vein features data, finger vena identification is carried out, otherwise feeds back to lift or decentralization finger pulp on host computer guiding user, Enter S3 steps.
  10. A kind of 10. ultrathin finger vein identification method according to claim 9, it is characterised in that：The step S6 tools Body is, by finger edge fitting into finger boundary straight line L1、L3, finger boundary straight line L1With finger boundary straight line L3Between folder Angle is defined as finger border angle, and when finger border angle is in threshold values, finger is placed correctly, as finger border L1、L3It is intersecting It is more than threshold values θ in Fingers butt and angle1When, Fingers root is too upper to be lifted, and places mistake；As finger border L1、L3Intersect at Fingers are sophisticated and angle is more than threshold values θ2When, Fingers root too pushes, and places mistake.
CN201710752961.1A 2017-08-29 2017-08-29 A kind of ultrathin finger vein identification device and recognition methods Withdrawn CN107392185A (en)

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CN201710752961.1A CN107392185A (en) 2017-08-29 2017-08-29 A kind of ultrathin finger vein identification device and recognition methods
PCT/CN2018/000261 WO2019041712A1 (en) 2017-08-29 2018-07-19 Ultrathin finger vein recognition apparatus and recognition method

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CN201710752961.1A CN107392185A (en) 2017-08-29 2017-08-29 A kind of ultrathin finger vein identification device and recognition methods

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Cited By (4)

* Cited by examiner, † Cited by third party
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CN109145792A (en) * 2018-08-09 2019-01-04 钧安科技（深圳）有限公司 Two fingers setting refers to vein identification device and method
WO2019041712A1 (en) * 2017-08-29 2019-03-07 广州微盾科技股份有限公司 Ultrathin finger vein recognition apparatus and recognition method
CN109784141A (en) * 2018-11-27 2019-05-21 中国船舶重工集团公司第七一八研究所 A kind of finger vena identification encryption system based on arm processor
CN110688932A (en) * 2019-09-20 2020-01-14 威海华菱光电股份有限公司 Vein recognition method and device

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CN113763379B (en) * 2021-09-23 2023-07-18 成都唐源电气股份有限公司 Hanger strand breakage detection method and device, computer equipment and storage medium

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JP2011197786A (en) * 2010-03-17 2011-10-06 Sony Corp Information processing apparatus and information processing method
CN203644047U (en) * 2013-12-02 2014-06-11 中山微盾信息科技有限公司 Open finger vein authentication device
CN103839053B (en) * 2014-03-05 2018-04-13 广州微盾科技股份有限公司 A kind of finger vena lock and its implementation
CN205028309U (en) * 2015-04-21 2016-02-10 识益生物科技(北京）有限公司 Cell -phone with finger vein identification module
CN107392185A (en) * 2017-08-29 2017-11-24 广州微盾科技股份有限公司 A kind of ultrathin finger vein identification device and recognition methods
CN207232983U (en) * 2017-08-29 2018-04-13 广州微盾科技股份有限公司 A kind of ultrathin type finger vein identification device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019041712A1 (en) * 2017-08-29 2019-03-07 广州微盾科技股份有限公司 Ultrathin finger vein recognition apparatus and recognition method
CN109145792A (en) * 2018-08-09 2019-01-04 钧安科技（深圳）有限公司 Two fingers setting refers to vein identification device and method
CN109784141A (en) * 2018-11-27 2019-05-21 中国船舶重工集团公司第七一八研究所 A kind of finger vena identification encryption system based on arm processor
CN110688932A (en) * 2019-09-20 2020-01-14 威海华菱光电股份有限公司 Vein recognition method and device

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Application publication date: 20171124

WW01 Invention patent application withdrawn after publication