CN108596031A - A kind of multispectral three-dimensional fingerprint and refer to venous collection device - Google Patents

A kind of multispectral three-dimensional fingerprint and refer to venous collection device Download PDF

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Publication number
CN108596031A
CN108596031A CN201810230463.5A CN201810230463A CN108596031A CN 108596031 A CN108596031 A CN 108596031A CN 201810230463 A CN201810230463 A CN 201810230463A CN 108596031 A CN108596031 A CN 108596031A
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China
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video camera
finger
light source
multispectral
extended line
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CN201810230463.5A
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Chinese (zh)
Inventor
刘凤
梁津榕
沈琳琳
骆南
刘亚辉
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Shenzhen University
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Shenzhen University
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Priority to CN201810230463.5A priority Critical patent/CN108596031A/en
Publication of CN108596031A publication Critical patent/CN108596031A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12Fingerprints or palmprints
    • G06V40/13Sensors therefor

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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)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The present invention is suitable for machine vision technique and optical technology in fingerprint identification technology field, it provides the multispectral three-dimensional fingerprint of one kind and refers to venous collection device, including shell, the imaging device being disposed in the housing, finger place apparatus, light source, energy supply control module and data interface module, finger place apparatus is set to the end face center of shell, light source is placed in the both sides of finger place apparatus set on the top surface of the shell, imaging device is placed in the lower section of finger plate placement, data interface module is placed in below imaging device, power control board is placed in the lower section of data interface module, data interface module connects imaging device, energy supply control module connects light source.By the conversion of double light sources, shoots the fingerprint image under different spectral coverage and refer to vein image, increase In vivo detection ability, reduce the possibility for forging fingerprint, antifalsification is good;3-D view is built by the finger-image that three frame video camera synchronizations acquire, obtains three-dimensional finger image.

Description

A kind of multispectral three-dimensional fingerprint and refer to venous collection device
Technical field
It is multispectral in fingerprint identification technology field, more particularly to one kind that the invention belongs to machine vision techniques and optical technology Three-dimensional fingerprint and refer to venous collection device.
Background technology
Human body biological characteristics identification technology is risen from the 1980s, in 21st century gradually extensive use, The traditional fields such as access control and attendance, identity discriminating are not only applied only to, in medical treatment, border security protection, entertainment field also obtain very big Development.The identifying system and method layer of fingerprint identification technology, palmprint recognition technology, iris recognition technology and face recognition technology Go out not poor.Fingerprint, since it is with unchangeable property, uniqueness and convenience, fingerprint recognition be widely used in gate inhibition, attendance, In the systems such as certification, in usual method, fingerprint identification technology is mainly the fingerprint for being arrived collection in worksite by image acquisition device Feature is compared with the fingerprint characteristic stored in fingerprint base, is judged whether to match, is obtained handling result.In traditional method, When reading fingerprint, user needs to contact with each other on finger and fingerprint capturer, in this traditional method, passes through the finger of personation Line attempts to there is a possibility that by fingerprint authentication prodigious, and therefore, traditional fingerprint identification technology is anti-fake there is also many deficiencies It is more difficult.
Invention content
The purpose of the present invention is to provide a kind of multispectral three-dimensional fingerprint and refer to venous collection device, it is intended to solve above-mentioned Technical problem.
The invention is realized in this way a kind of multispectral three-dimensional fingerprint and refer to venous collection device, the multispectral three-dimensional Fingerprint and to refer to venous collection device include shell, imaging device, finger place apparatus, light source, energy supply control module and number According to interface module, the imaging device, finger place apparatus, light source, energy supply control module and data interface module are all provided with In in the shell, the finger place apparatus is set to the end face center of the shell, and the light source is set to the shell Top surface be placed in the both sides of the finger place apparatus, the imaging device is placed in the lower section of the finger plate placement, described Data interface module is placed in below the imaging device, and the power control board is placed in the lower section of the data interface module, institute It states data interface module and connects the imaging device, the energy supply control module connects the light source.
The present invention further technical solution be:The imaging device includes the first video camera, the second video camera and third Video camera, first video camera and third video camera are respectively arranged on the both sides of second video camera, first video camera Optical center extended line, the optical center extended line of the second video camera and the optical center extended line of third video camera intersect at The central point of the finger plate placement.
The present invention further technical solution be:The optical center extended line of second video camera is imaged with the third The intersection point angle of the optical center extended line of machine is 250~350, the optical center extended line of second video camera and described the The intersection point angle of the optical center extended line of one video camera is 250~350
The present invention further technical solution be:The optical center extended line of second video camera is imaged with the third The intersection point angle of the optical center extended line of machine is 300, the optical center extended line of second video camera takes the photograph with described first The intersection point angle of the optical center extended line of camera is 300
The present invention further technical solution be:Distance of second video camera apart from the finger place apparatus be 10cm。
The present invention further technical solution be:The light source includes LED light bar and light source converter, the light source Converter connects the LED light bar.
The present invention further technical solution be:The LED light bar using common green light lamp bar and 840nm it is close Infrared light lamp bar;The LED light bar is set to the panel both sides of the finger place apparatus, is 2cm apart from panel.
The present invention further technical solution be:The data interface module includes data pcb board, is set to the data Usb interface unit on pcb board, for the usb interface unit using USB3.0Hub, the usb interface unit is three.
The present invention further technical solution be:The energy supply control module includes control pcb board, is set to the control Power supply unit, communication unit on pcb board and control unit, the power supply unit are electrically connected described control unit, the control Unit processed connects the communication unit two-way communication.
The present invention further technical solution be:The power supply unit connects the light source using serial mode.
The beneficial effects of the invention are as follows:Pass through the finger-image in three three directions of frame camera acquisition so that can shoot To the complete finger print image on the right side of nail on the left of to nail;By the conversion of double light sources, the fingerprint image under different spectral coverage is shot And refer to vein image, In vivo detection ability is increased, the possibility for forging fingerprint is reduced, antifalsification is good;It is imaged by three framves The finger-image of machine synchronization acquisition builds 3-D view, obtains three-dimensional finger image.
Description of the drawings
Fig. 1 is multispectral three-dimensional fingerprint provided in an embodiment of the present invention and refers to the facing structure signal of venous collection device Figure.
Fig. 2 is multispectral three-dimensional fingerprint provided in an embodiment of the present invention and refers to the plan structure signal of venous collection device Figure.
Fig. 3 is multispectral three-dimensional fingerprint provided in an embodiment of the present invention and refers to the operation chart of venous collection device.
Specific implementation mode
As shown in Figs. 1-3, multispectral three-dimensional fingerprint provided by the invention and refer to venous collection device, the multispectral three-dimensional Fingerprint and to refer to venous collection device include shell, imaging device, finger place apparatus, light source, energy supply control module and number According to interface module, the imaging device, finger place apparatus, light source, energy supply control module and data interface module are all provided with In in the shell, the finger place apparatus is set to the end face center of the shell, and the light source is set to the shell Top surface be placed in the both sides of the finger place apparatus, the imaging device is placed in the lower section of the finger plate placement, described Data interface module is placed in below the imaging device, and the power control board is placed in the lower section of the data interface module, institute It states data interface module and connects the imaging device, the energy supply control module connects the light source.
The imaging device includes the first video camera, the second video camera and third video camera, first video camera and the Three video cameras are respectively arranged on the both sides of second video camera, the optical center extended line of first video camera, the second camera shooting The optical center extended line of machine and the optical center extended line of third video camera intersect at the central point of the finger plate placement.
The intersection point of the optical center extended line of second video camera and the optical center extended line of the third video camera Angle is 250~350, the optical center extended line of the optical center extended line of second video camera and first video camera Intersection point angle be 250~350
The intersection point of the optical center extended line of second video camera and the optical center extended line of the third video camera Angle is 300, the friendship of the optical center extended line of second video camera and the optical center extended line of first video camera Point angle is 300
Distance of second video camera apart from the finger place apparatus is 10cm.
The light source includes LED light bar and light source converter, and the light source converter connects the LED light bar.
The LED light bar is using the lamp bar of common green light and the near infrared light lamp bar of 840nm;The LED light bar is set It is 2cm apart from panel in the panel both sides of the finger place apparatus.
The data interface module includes data pcb board, the usb interface unit being set on the data pcb board, described For usb interface unit using USB3.0Hub, the usb interface unit is three.
The energy supply control module includes control pcb board, power supply unit, the communication unit being set on the control pcb board And control unit, the power supply unit are electrically connected described control unit, it is two-way that described control unit connects the communication unit Communication.
The power supply unit connects the light source using serial mode.
An embodiment of the present invention provides a kind of multispectral three-dimensional fingerprint and refer to venous collection device, for acquiring Fingers Line, finger joint and finger vena multi-modal biological characteristic, ordinary light source and near-infrared light source acquisition fingerprint image and finger vena figure Picture is used for In vivo detection, prevents the forgery of fingerprint.In order to enable those skilled in the art to better understand the solution of the present invention, under Face will combine the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention to carry out clear, complete description.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, should all belong to the scope of protection of the invention.
In the embodiment of the present invention, when determining that user's finger puts standard acquisition position, finger is acquired from three directions Image, the shooting of intermediate video camera is finger direct picture, and the video camera on both sides is located at the left and right two of center camera The position that 30 ° of side, shooting is finger left-side images and image right, according to the finger figure of three frame camera acquisition of same time As three-dimensional finger image can be obtained with implement three-dimensional image.
The present invention provides a kind of multispectral three-dimensional fingerprint and refer to venous collection device, one embodiment packet of the device It includes, the structure of the device is illustrated first:
Understood incorporated by reference to Fig. 1, Fig. 1 is the front view of the device, and device includes shell, finger plate placement 2, is set in shell It is equipped with imaging device, light source led lamp bar 1,3, USB3.0Hub5, energy supply control module 6.Imaging device includes three frame CMOS camera shootings Machine is video camera 4, video camera 7, video camera 8 respectively.Light source led lamp bar has the near-infrared of common green light LED lamp bar and 840nm Light LED light bar.USB3.0Hub5 is USB3.0 interfaces, and power supply and connection are provided to three frame video cameras.Energy supply control module 6 be by Power module and single chip control module composition, power module provide power supply to LED light bar, and single chip control module is that progress is general The switching of logical green light and near infrared light.
Wherein, USB3.0Hub5 is connect with three frame video cameras, and energy supply control module is connect with LED light bar.
Understood incorporated by reference to Fig. 2, Fig. 2 is the overlooking structure diagram of device.Fingerprint collecting includes video camera 4, camera shooting Machine 7, video camera 8 pass through USB3.0Hub5 connections and power supply.USB3.0Hub connection video cameras, the figure that video camera can be made to shoot Faster as transmission speed.Energy supply control module includes power module 6 and one-chip computer module 6, wherein one-chip computer module passes through serial ports It is connected with computer, the switching of common green light and near infrared light can be carried out.Light source in the embodiment of the present invention is with green light and 840nm It is illustrated near infrared light.
It is provided with three frame video cameras in image capture module, in the embodiment of the present invention, the angle between three frame video cameras is adopted With 300, the camera shooting function of the right and left takes on the left of nail to the complete finger print image on the right side of nail, while ensureing adjacent Video camera clap between image overlapping area reach the half of image size, entire finger is completely covered, is taken the photograph according to three framves The finger-image of camera synchronization shooting reconstructs three-dimensional finger image.Under near-infrared image, guarantee refers to vein image extraction Quality, for activity detection and refer to the feature extraction etc. of vein, under ordinary light source, ensure the lines details of fingerprint and finger joint Quality, for analyzing fingerprint characteristic and finger joint feature.Meanwhile three distance of the frame video camera apart from finger be 10cm, ensure shooting Fingerprint picture be 1024x1280 pixels, resolution ratio be 600 dpi.
The mechanism of the device is described above, the process for acquiring fingerprint to the device below is specifically described:
It please refers to shown in Fig. 3, in order to obtain the accuracy of fingerprint, user's finger first is placed on finger plate placement, from finger The position that point refers to folding line to the second of finger.The finger length of video camera 4 in the embodiment of the present invention, 7,8 acquisition shootings is finger tip Referring to folding line, both sides of the LED light source 1 below finger plate placement to the second of finger, distance is placed at the panel 2cm of finger, Light can uniformly be irradiated to finger in this way, can adjust the intensity of illumination manually, be optimal choosing, improve shooting image Quality.
After user places finger, switched into line light source by one-chip computer module, is the three framves camera shooting under ordinary light source first Machine shoots finger-image simultaneously, obtains the image in three faces of finger, then automatically switches under near infrared light, and three frame video cameras are same When shooting fingerprint and refer to vein image.
According to the finger-image of the video camera in three directions shooting, its collected finger-image is established mutual corresponding Characteristic matching pair, by previously given finger shape model, interpolation obtains the three dimensional point cloud of all picture points, will be intermediate The image of camera shooting is by correspondence and Points cloud Fitting, the three-dimensional finger image to be built.
The panel for placing finger equipment is located at shell middle, and the finger length that panel is exposed is at least two finger joints.
Universal serial bus 3.0USB interfaces are provided in the shell, the circuit board includes light source converter;It is described 3.0USB interfaces are for connecting external power supply and three frame video cameras;The light source converter includes microcontroller and power supply serial ports, list Piece machine switches green light and near infrared light for controlling light source switching, for described device;Power supply serial ports is that LED light bar connects external electrical Source.
The light source has ordinary light source and near-infrared light source;The ordinary light source selection is green light, the reason is that green light can To generate better dactylotype contrast, the case where for finger skin(It is dry or wet)Also there is relatively good inclusiveness; The wavelength of the near-infrared light source is 840nm.
The common LED light bar of green light and the near infrared light lamp bar of 840nm are installed at the panel both sides for placing finger respectively, away from At the panel 2cm for placing finger.
Angle between the three framves video camera is 30o, can take from nail left side to the complete finger print on the right side of nail Image, at the same ensure adjacent camera clap between image overlapping area reach the half of image size, after ensureing The quality of phase three-dimensionalreconstruction image.
The resolution ratio of the two dimensional image of the collecting device acquisition is 600dpi, distance of the intermediate video camera apart from finger For 10cm.
By reconstructing method, the two dimensional image that three frame video cameras are clapped in the same time is subjected to three-dimensionalreconstruction.
A kind of multispectral three-dimensional fingerprint and refer to venous collection device, antifalsification is good, can live by referring to vein pattern Physical examination is surveyed, and the degree of safety of identification is improved.
The present invention provides a kind of multispectral three-dimensional fingerprint and refer to venous collection device, which includes:Shell, the shell It is provided with imaging device in vivo;The imaging device includes three frame video cameras.
Three frame video cameras are respectively 30 from the angle between three position shooting, collecting images, three frame video cameras0, angle is too The both sides of pinkie can not collect, and the part of the fingerprint overlapping of the excessive acquisition of angle is very little.
If 300, then the camera shooting function of the right and left take on the left of the nail to the complete finger print image on the right side of nail, Ensure simultaneously adjacent camera clap between image overlapping area reach the half of image size, to carry out three-dimensional fingerprint Image construction.
Distance of the intermediate video camera apart from finger is 10cm, ensures that the fingerprint picture of shooting is 1024X1280 Pixels, resolution ratio are 600 dpi.
Universal serial bus 3.0USB interfaces are that three frame video cameras are powered and connected.
Optionally, light source is provided with ordinary light source and near-infrared light source.
Ordinary light source selection is green light, and reason one, which is green light, can generate better dactylotype contrast, for hand The case where referring to skin(It is dry or wet)Also there is relatively good inclusiveness;Reason is second is that the video camera used imitates the quantum of green light Rate is also highest.
The wavelength of near-infrared light source selection is 840nm, the quantum efficiency of the video camera of use to the near infrared spectrum wavelength It is highest.
Microcontroller controls light source conversion, switches green light and near infrared light.
Power supply serial ports is that LED light bar and microcontroller are powered.
Finger is placed on the centre of case panel, and hood has been placed above, and places among the panel of finger that there are at least The width of two finger joints.
Optionally, the finger print figure and finger joint figure under ordinary light source and near-infrared light source can be shot, multispectral finger is provided Print image, while can also shoot the finger vein image of finger.
Ordinary light source LED light bar and near-infrared LED lamp bar are placed in the panel both sides for placing finger, and distance places finger At panel 2cm, scattering illumination is uniform, and near infrared light can uniformly shine finger, can shoot clearly finger vena.
Optionally, common green-light source and the light intensity of near-infrared light source can be adjusted, and are used for the debugging of varying environment, reached The optimal situation of shooting.
According to the image of the video camera synchronization in three directions acquisition, fingerprint 3-D view is reconstructed.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.

Claims (10)

1. a kind of multispectral three-dimensional fingerprint and referring to venous collection device, which is characterized in that the multispectral three-dimensional fingerprint and refer to quiet Arteries and veins harvester includes shell, imaging device, finger place apparatus, light source, energy supply control module and data interface module, The imaging device, finger place apparatus, light source, energy supply control module and data interface module are set to the shell Interior, the finger place apparatus is set to the end face center of the shell, and the top surface that the light source is set to the shell is placed in The both sides of the finger place apparatus, the imaging device are placed in the lower section of the finger plate placement, the data-interface mould Block is placed in below the imaging device, and the power control board is placed in the lower section of the data interface module, the data-interface Module connects the imaging device, and the energy supply control module connects the light source.
2. multispectral three-dimensional fingerprint according to claim 1 and referring to venous collection device, which is characterized in that the imaging is set Standby includes the first video camera, the second video camera and third video camera, and first video camera and third video camera are respectively arranged on institute State the both sides of the second video camera, the optical center extended line of first video camera, the optical center extended line of the second video camera And the optical center extended line of third video camera intersects at the central point of the finger plate placement.
3. multispectral three-dimensional fingerprint according to claim 2 and referring to venous collection device, which is characterized in that described second takes the photograph The optical center extended line of camera and the intersection point angle of the optical center extended line of the third video camera are 250~350, described The optical center extended line of second video camera and the intersection point angle of the optical center extended line of first video camera are 250~ 350
4. multispectral three-dimensional fingerprint according to claim 3 and referring to venous collection device, which is characterized in that described second takes the photograph The optical center extended line of camera and the intersection point angle of the optical center extended line of the third video camera are 300, described second The optical center extended line of video camera and the intersection point angle of the optical center extended line of first video camera are 300
5. multispectral three-dimensional fingerprint according to claim 4 and referring to venous collection device, which is characterized in that described second takes the photograph Distance of the camera apart from the finger place apparatus is 10cm.
6. multispectral three-dimensional fingerprint according to claim 1 and referring to venous collection device, which is characterized in that the light source is set Standby includes LED light bar and light source converter, and the light source converter connects the LED light bar.
7. multispectral three-dimensional fingerprint according to claim 6 and referring to venous collection device, which is characterized in that the LED light Strip adoption is the lamp bar of common green light and the near infrared light lamp bar of 840nm;The LED light bar is set to the finger place apparatus Panel both sides, apart from panel be 2cm.
8. multispectral three-dimensional fingerprint according to claim 1 and referring to venous collection device, which is characterized in that the data connect Mouth mold block includes data pcb board, be set to the data pcb board on usb interface unit, the usb interface unit using USB3.0Hub, the usb interface unit are three.
9. multispectral three-dimensional fingerprint according to claim 1 and referring to venous collection device, which is characterized in that the power supply control Molding block includes control pcb board, power supply unit, communication unit and the control unit being set on the control pcb board, the power supply Unit is electrically connected described control unit, and described control unit connects the communication unit two-way communication.
10. multispectral three-dimensional fingerprint according to claim 9 and referring to venous collection device, which is characterized in that the power supply Unit connects the light source using serial mode.
CN201810230463.5A 2018-03-20 2018-03-20 A kind of multispectral three-dimensional fingerprint and refer to venous collection device Pending CN108596031A (en)

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CN110163164A (en) * 2019-05-24 2019-08-23 Oppo广东移动通信有限公司 A kind of method and device of fingerprint detection
CN110298273A (en) * 2019-06-17 2019-10-01 深圳大学 A kind of 3D based on multispectral image refers to vein extracting method and system

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CN110046564A (en) * 2019-04-02 2019-07-23 深圳市合飞科技有限公司 A kind of multispectral living body finger print identification equipment and recognition methods
CN110163164A (en) * 2019-05-24 2019-08-23 Oppo广东移动通信有限公司 A kind of method and device of fingerprint detection
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