WO2016019882A1 - Dispositif de formation d'image de reconnaissance de veine et procédé d'authentification sécurisée de terminal mobile - Google Patents

Dispositif de formation d'image de reconnaissance de veine et procédé d'authentification sécurisée de terminal mobile Download PDF

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Publication number
WO2016019882A1
WO2016019882A1 PCT/CN2015/086222 CN2015086222W WO2016019882A1 WO 2016019882 A1 WO2016019882 A1 WO 2016019882A1 CN 2015086222 W CN2015086222 W CN 2015086222W WO 2016019882 A1 WO2016019882 A1 WO 2016019882A1
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Prior art keywords
optical
vein recognition
mobile terminal
vein
imaging
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Chinese (zh)
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倪蔚民
沈洪泉
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Suzhou Siyuan Kean Information Technology Co Ltd
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Suzhou Siyuan Kean Information Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints

Definitions

  • the invention relates to the field of opto-mechatronics, in particular to a vein recognition imaging device for mobile terminal safety certification and a control method thereof.
  • Mobile terminals include smart phones, tablets, wearable devices, etc.
  • mobile terminal devices are inevitably the most widely used devices in the future.
  • the conventional method for identity verification in the prior art is password input, but the means of identity verification is very low in security, and only a simple virus program needs to be implanted on the mobile terminal to leak the password. , causing corresponding losses.
  • the biometric identification method is used for mobile terminal security identity authentication; for example, the fingerprint recognition technology developed by Apple based on AuthenTec, which is applied to mobile phone terminals, greatly improves the mobile terminal.
  • Identity verification security since the fingerprint is static, although it is singular, it is extremely easy to obtain fingerprint information, even being copied, etc., so with the fingerprint technology on the mobile terminal As the application becomes more and more extensive, its security will also decline accordingly. Therefore, biometrics (vein recognition), which is more advantageous in terms of security, is a very effective method to solve the mobile identity authentication process, and vein recognition.
  • the system is the safest way to secure the living body in the existing biometrics.
  • the most typical ones are Japanese Hitachi finger vein recognition, and the transmission imaging method using a fixed contact structure seat determines that the volume and structure cannot be used for the common standard of 8mm*8mm*6mm in mobile terminals. Size; like Japan Fujitsu palm vein recognition, it also has a defect far larger than the common standard size in the mobile terminal, and the working distance is only 4-6cm, it can not be used in such a short working range, and the use actually needs to rely on additional The fixed contact structure can only be used.
  • the user is usually hand-held, and needs to be recognized during the moving travel. There is a very large and unpredictable movement of the finger or palm back of the hand, which seriously affects the image quality.
  • the usage scenario of the mobile terminal determines that the structure cannot be fixed contact type, and it is impossible to use it by attaching a fixed contact structure, which can only be realized by non-contact type.
  • the mobile terminal is battery-powered, and its power consumption for the vein recognition imaging module is very high.
  • the miniaturization of the vein recognition optical imaging module is in accordance with the general standard size of 8mm*8mm*6mm in the mobile terminal.
  • the technical problem to be solved by the present invention is to provide a vein recognition imaging module for mobile terminal security identity authentication and a control method thereof.
  • the present invention provides a vein recognition imaging apparatus for mobile terminal security authentication, comprising a vein recognition imaging apparatus disposed on a mobile terminal;
  • the mobile terminal includes a mobile terminal motherboard, a processor chip, a memory, and a memory a power management module and a wireless baseband module;
  • the vein recognition imaging device is composed of a near-infrared LED illumination source and a vein recognition imaging module optical component;
  • the near-infrared LED illumination source is driven by a near-infrared LED current driver;
  • the imaging module optical component comprises a near-infrared optical filter for filtering the reflected light of the near-infrared LED illumination source and filtering the reflected light, and an optical imaging lens for focusing the filtered light of the near-infrared optical filter,
  • An image imaging sensor for focusing an optical imaging lens, and a vein recognition imaging module substrate for transmitting an image of the image imaging sensor;
  • the near-infrared LED illumination source is a surface patch package; and the near-infrared LED current driver drives a near-infrared LED illumination source to output a maximum radiation intensity I short-time T-pulse periodic timing emission light; the near-infrared LED illumination source outputs the highest radiation intensity I short time T pulse period timing synchronization image imaging sensor frame pixel global trigger exposure cycle timing; the near-infrared LED illumination source emission
  • the half-peak radiation or divergence angle of light is greater than or equal to optical Imaging angle of view FOV of the lens; the optical imaging lens fixed focus lens, liquid drive lens, liquid crystal drive lens, VCM voice coil drive lens, MEMS drive lens, EDOF phase wavefront coding lens, WLA wafer level lens array Any one of the half-peak transmission wavelength bandwidths FWHM of the near-infrared optical filter effectively matching or covering a half-peak radiation wavelength bandwidth FWHM of the light emitted by the near-inf
  • the near-infrared LED illumination source has a center peak wavelength range of 750-880 nm and a FWHM of 30-60 nm;
  • the near-infrared optical filter The center of the device has a peak wavelength range of 750-880 nm and a FWHM of 10-60 nm;
  • the near-infrared optical filter is any one of a narrow-band near-infrared optical filter or a band-pass near-infrared optical filter;
  • the optical imaging The field of view FOV of the lens has the following range of values: FOV ⁇ 2 * arctan ((DOI * SOP) / (2 * EFL)); the DOI is the number of diagonal pixels of the image imaging sensor; SOP is image imaging The physical scale of the sensor unit pixel; EFL is the equivalent focal length value of the optical imaging lens.
  • a further improvement of the vein recognition imaging apparatus for mobile terminal security authentication according to the present invention is that the near-infrared LED illumination source is provided with an optical diffusing diffuser for providing a uniform emission or radiation illumination light field.
  • a further improvement of the vein recognition imaging apparatus for mobile terminal security authentication according to the present invention is that the optical diffusing diffuser is an optical diverging mirror.
  • the near-infrared LED illumination source is provided with an optical linear polarizer; corresponding to the optical linear polarizer, a corresponding positive is set in the imaging optical path A 90 degree optical linear polarizer.
  • the mobile terminal is provided with a use state guiding prompt device;
  • the use state guiding prompt device includes a voice device, an indicator light, and a liquid crystal screen The voice device, the indicator light, and the liquid crystal screen are connected to the processor chip signal.
  • the method for performing safety authentication using the vein recognition imaging module of the mobile terminal comprises the following steps: 1) the processor chip acquires a digital vein image output by the image imaging sensor; 2) the processor chip performs a vein recognition algorithm to perform extraction of the vein feature 3), the processor chip generates a vein feature template through the vein feature information; 4) obtains at least 2 or more vein feature templates through the cycle steps 1) to 3), and performs cross-certification comparison between the vein feature templates to
  • the specific vein feature template of the best result after the cross-certification comparison is a standard vein feature template; 5) the standard vein feature template is encrypted by the cryptographic system and stored in the configuration processor chip as a key, and is guaranteed to be never Export and access; 6), the identity authentication of the vein feature template is performed inside the processor chip, ensuring that the mobile terminal is safe from external attacks during the entire identity authentication process.
  • the digitized vein image output by the image imaging sensor is obtained by the following steps: 1.1) defining the original unit of the vein recognition imaging module The photoelectric signal of the pixel brightness value Yraw; 1.2) defines the pixel area luminance statistical evaluation value Ysp; 1.3), and realizes the vein area pixel brightness statistical evaluation value Ysp in the preset [Yll, Yhl] brightness range.
  • the diameter of the optical aperture, FEL is the equivalent focal length value of the optical imaging lens
  • SOP is the
  • the present invention achieves the following effects required by the mobile terminal usage scenario:
  • the ambient light level required for user identification is required to satisfy 100,000 Lux from the indoor complete dark 0Lux to the outdoor direct sunlight.
  • the vein recognition imaging module realizes non-contact collection and use, and does not need to be attached with a fixed contact structure.
  • the power consumption of the light source of the vein recognition imaging module is low.
  • the volume of the vein recognition imaging module is miniaturized.
  • FIG. 1 is a general structural diagram of a vein recognition imaging module according to a specific embodiment of the present invention.
  • FIG. 2 is a structural diagram of an optical component of a vein recognition imaging module according to a specific embodiment of the present invention
  • FIG. 3 is a schematic diagram of a vein identification imaging module mounted on the back of a mobile smart phone according to a specific embodiment of the present invention
  • FIG. 4 is a timing sequence diagram of a frame pixel global trigger exposure (integration) of a maximum radiation intensity short-time pulse period timing synchronization imaging sensor generated by an infrared LED illumination source according to a specific embodiment of the present invention.
  • FIG. 1 shows a vein recognition imaging device for mobile terminal security authentication, comprising a vein recognition imaging module optical component 1, a near-infrared LED current driver 2, and a near-infrared LED illumination disposed on the mobile terminal.
  • the light source 3 and the vein recognition imaging module connection line 4; the mobile terminal comprises a mobile terminal motherboard 10, a processor chip 5, a memory 6, a memory 7, a power management 8 and a wireless baseband module 9.
  • the processor chip 5 is an ARM CORTEX-A processor chip configured with TrustZone's secure isolation mode; the memory 6 is DDR memory; the memory 7 is NAND FLASH memory; and the power management 8 is a PMIC power management module.
  • the above mobile terminal motherboard 10, processor chip 5, memory 6, memory 7, power management 8 and wireless baseband module 9 can all be purchased and assembled by the market.
  • the near-infrared LED illumination source 3 is connected to the near-infrared LED current driver 2, and the near-infrared LED illumination source 2 is driven by the near-infrared LED current driver 2 to generate a pulse period-time emission light that outputs the highest radiation intensity I for a short time T; here, in the selection
  • the surface mount package (SMD) is used to reduce the volume [using a surface mount package (SMD) near-infrared LED illumination source].
  • the mobile terminal board 10 and the vein recognition imaging module optical component 1 and the near-infrared LED current driver 2 are mutually connected by a vein identification imaging module connection line 4; the implementation includes a pixel clock, pixel data, pixel data synchronization signal, and I2C communication.
  • the near-infrared LED current driver 2 drives the control signal transmission of the near-infrared LED illumination source 3.
  • Mobile terminal board 10 integrated configuration TrustZone security isolation mode ARM CORTEX-A processor chip 5 (for performing all control, identification, application data processing calculation), DDR memory 6 (used to provide processor chip 5 processing calculations required Memory), NAND FLASH memory 7 (for storing all necessary power-down saveable data), PMIC power management 8 (providing power to all levels of the mobile terminal board 10) and wireless baseband module 9 (for wireless communication applications)
  • the mobile terminal motherboard 10 implements control and secure identity authentication of the vein recognition imaging module of the present invention.
  • Vein recognition imaging module optical component 1 for non-contact physical imaging to collect fingers The back vein image of the palm of the hand.
  • the specific structure of the vein identification imaging module optical component 1 comprises the following components: a front focus near-infrared optical filter 11, a fixed focal length optical imaging lens 12, a fixed mount of the optical imaging lens 13, and a rear.
  • the image recognition sensor 15 , the back focus near-infrared optical filter 14 , the fixed mount 13 of the optical imaging lens, the optical imaging lens 12 with a fixed focal length, and the front focal near infrared optics are sequentially disposed from the bottom to the top of the vein recognition imaging module substrate 16 .
  • Filter 11 The image recognition sensor 15 , the back focus near-infrared optical filter 14 , the fixed mount 13 of the optical imaging lens, the optical imaging lens 12 with a fixed focal length, and the front focal near infrared optics are sequentially disposed from the bottom to
  • the vein recognition imaging module substrate 16 is composed of a printed circuit board, a flexible circuit board or a soft and hard bonding board, and is used for providing a fixed structure carrier in which the optical component 1 of the vein recognition imaging module is integrally mounted.
  • the fixed mount 13 of the optical imaging lens is used to mount a fixed focal length optical imaging lens 12.
  • the highly mature mobile terminal component design and manufacturing process can realize the miniaturization of each optical component in the optical component 1 of the vein recognition imaging module, and adopts the mature technical field of the art to design and manufacture the vein identification imaging module to fully satisfy the movement.
  • the near-infrared light radiated by the near-infrared LED illumination source 3 enters the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14 after the optical biological effect of absorption, scattering, and reflection of the object square vein (
  • the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14 are simultaneously present, the front focus near-infrared optical filter 11 is alone or the back focus near-infrared optical filter 14 is separate.
  • the three NIR optical filters can be set in the best case of the invention for non-imaging interference light filtering, then enter the fixed focal length optical imaging lens 12; fixed focal length optical imaging
  • the lens 12 is an autofocus AF optical imaging lens or a fixed focus optical imaging lens for realizing non-contact optical physical focusing to the image imaging sensor 15 located at the image side, causing the image optical signal to be converted into an image electrical signal output, and finally by vein recognition.
  • the imaging module connection line 4 is connected to the mobile terminal motherboard 10, and the vein recognition imaging module of the present invention is controlled by the processor chip 5.
  • the vein recognition imaging module of the present invention is further provided with a use state guiding prompting device.
  • the use state guiding prompting device includes a voice prompting device (speaker), an indicator light, and a liquid crystal screen for indicating a state guiding when the user uses, such as a finger palm back placement position and distance, recognition result feedback, and the like.
  • the near-infrared LED illumination source 3 described above has a center peak wavelength range of 750-880 nm, a FWHM of 30-60 nm, and a center peak of the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14.
  • the lighter 14 can be a narrowband near-infrared optical filter or a bandpass near-infrared optical filter).
  • the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14 are coated with an optically transparent glass such as BK7 or an optical material such as colored glass or optical resin, and the current coating process and technology can achieve the background.
  • Depth cutoff rate or Signal-to-noise ratio SNR SNR: signal-to-noise ratio
  • SNR Signal-to-noise ratio
  • the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14 filters the wavelength used for imaging such that the imaging wavelength interferes with the non-imaged background by the signal-to-noise ratio SNR of the stray light (SNR: signal-to -noise ratio) Satisfaction: ⁇ 60dB (1000:1).
  • Ambient non-imaging interference light ie, non-imaging background interference stray light
  • Non-imaging interference stray light with different illumination levels in the environment seriously affects the quality of vein image; the greater the illumination, the greater the influence of vein image quality.
  • different moving speeds will cause motion blur, which will seriously affect the quality of the vein image; the greater the moving speed, the greater the influence of the vein image quality.
  • the present invention adopts the following design:
  • the near-infrared LED illumination source 3 and the image imaging sensor 15 are combined and configured as follows:
  • the highest radiation intensity generated by the near-infrared LED illumination source 3 is short time T pulse period timing synchronization image imaging sensor 15 frame pixel global trigger exposure (integration) cycle timing;
  • the method for synchronizing periodic timing frame pixel global trigger exposure (integration) of the image imaging sensor 15 of the present invention employs triggering all frame pixel synchronization of the image imaging sensor 15 only in the imaging wavelength range and the highest radiation intensity short time period sequence. Exposure (integration).
  • the exposure cycle timing of different rows is inconsistent, but under the condition that the imaging triggers (integration) of all the frame pixels in the imaging wavelength range and the highest radiation intensity short time period timing are synchronized.
  • the ratio of exposure (integral) photon signal accumulation outside the shortest time period of the highest radiation intensity to the highest radiation intensity is much greater than 1000:1, so that the most effective resolution for a typical imaging sensor ADC is only 8 bits or 10 digits can be ignored. Therefore, the method is applicable to various types of imaging sensors, such as a global shutter, an electronic rolling shutter (ERS) or a global release shutter GRS, and various types of imaging sensors.
  • the method of synchronizing the highest radiation intensity I generated by the near-infrared LED illumination source 3 with the short-time T-pulse period timing and the period timing of the image-imaging sensor 15 frame pixel global trigger exposure (integration), the synchronization pulse period timing radiation and exposure method It is an important advantage of the present invention.
  • the vein recognition optical imaging module designed in this way has low power consumption of the light source and only 1/30 equivalent radiation compared with the conventional continuous radiation source.
  • the radiation and exposure methods that emphasize the traditional continuous cycle timing are only a special case of the radiation and exposure methods of the synchronous pulse period timing of the present invention.
  • the pulse period is 100% duty cycle timing
  • the radiation and exposure are equal to the continuous period timing radiation and exposure.
  • the SNR SNR: signal-to-noise ratio
  • the ambient illuminance requirements of the vein recognition optical imaging module of the present invention are such that it is from indoor complete darkness (0 Lux) to outdoor direct sunlight (100,000 Lux).
  • High-radiation intensity short-time periodic timing frame pixel synchronization global trigger exposure can completely eliminate motion blur up to 1m/s, so that the moving speed of vein image imaging needs to meet the moving speed from moving speed 1m/s to completely static moving speed 0cm /s.
  • the near-infrared LED illumination source 3 and the optical imaging lens 12 are combined and configured as follows:
  • the half-peak radiation or divergence angle of the near-infrared LED illumination source 3 is greater than or equal to the imaging field of view angle FOV of the optical imaging lens 12.
  • the field of view angle FOV of the optical imaging lens has the following values:
  • the DOI described in the above formula is the number of diagonal pixels of the image imaging sensor; the SOP is the physical scale of the image imaging sensor unit pixel; and the FEL is the equivalent focal length value of the optical imaging lens.
  • the near-infrared LED illumination source 3 is provided with an optical diffusing diffuser for providing a uniform emission or radiation illumination field to form a vein image with a balanced brightness distribution, which effectively reduces total reflected light from the back surface of the palm of the hand.
  • the optical diffusing diffuser can be configured as an optical diverging mirror.
  • the near-infrared LED illumination light source 3 is configured with an optical linear polarizer, and an orthogonal state 90-degree optical linear polarizer is disposed in the imaging optical path (front or rear of the optical imaging lens 12), and an orthogonal state line is formed through the transmitting and receiving ends.
  • the polarizer completely removes the total reflected light from the back surface of the palm of the hand.
  • the near-infrared LED illumination source 3 and the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14 are configured as follows:
  • the half-peak transmission wavelength bandwidth FWHM of the front focus near-infrared optical filter 11 and/or the back focus near-infrared optical filter 14 effectively matches or covers the half-peak radiation of the near-infrared LED illumination source 3 Wavelength bandwidth FWHM.
  • This design allows for maximum imaging wavelength utilization and imaging of high quality vein images.
  • the near-infrared LED illumination source has a peak wavelength range of 750-880 nm and a FWHM of 30-60 nm; a near-infrared optical filter has a peak wavelength range of 750-880 nm and a FWHM of 10-60 nm.
  • the fixed focal length optical imaging lens 12 is selected from the group consisting of a fixed focus lens, a liquid drive lens, a liquid crystal drive lens, a VCM voice coil motor drive lens, a MEMS microelectromechanical system drive lens, an EDOF wavefront code lens or a WLA wafer level lens array. Any one. Liquid drive lens, liquid crystal drive lens, VCM voice coil drive lens, MEMS drive lens, EDOF phase wavefront code lens, WLA wafer level lens array are configured to achieve autofocus AF of optical imaging lens, auto focus can be further increased The working distance and range of non-contact acquisition make it easier to use.
  • the vein identification imaging module of the specific implementation column 1 described above is installed on the mobile smart phone, and the state of the user in use is as shown in FIG. 3: the mobile phone back side 100 is provided with the vein recognition imaging module optical component 1 and the surface patch package. (SMD) near-infrared LED illumination source 3.
  • SMD surface patch package.
  • the palm of the hand is placed in front of the vein recognition imaging module optical component 1.
  • the near-infrared LED illumination source 3 provides illumination to the front finger palm back, and the near-infrared LED illumination source 3 radiates near-infrared light.
  • the optical component 1 entering the vein recognition imaging module realizes non-contact optical physical focusing to the image imaging sensor 15 located at the image side to convert the image light signal into an image electrical signal output. The process is as follows:
  • the T described above is the frame pixel global trigger exposure time exposure time or integral time integrationtime of the image imaging sensor, and the cycle timing is synchronized with the short-time T pulse period timing of the near-infrared illumination source; T ⁇ 3.33ms (milliseconds);
  • I is the highest radiation intensity of the near-infrared illumination source; I ⁇ 10mW/sr (milliwatts per sphericity);
  • the GAIN described above is the analog gain of the image imaging sensor; the image-to-noise ratio SNR of the image imaging sensor generated by the maximum GAIN value is ⁇ 38db;
  • D is the diameter of the aperture or clear aperture of the optical imaging lens
  • FEL is the equivalent focal length of the optical imaging lens
  • SOP is the physical scale of the image imaging sensor unit pixel
  • ⁇ is the equivalent peak wavelength of the near-infrared LED illumination source
  • the above C is the fixed photoelectric signal conversion rate constant of the vein recognition imaging module
  • the S described above is a venous region pixel brightness statistical evaluation function, and the pixel brightness system
  • the method used by the evaluation function includes: pixel luminance histogram statistics, pixel luminance spectrum statistics, pixel luminance average, pixel luminance weighted average, or pixel luminance median value;
  • Yll described above is the lower limit of the pixel brightness of the vein region, and Yhl is the upper limit of the pixel brightness of the vein region;
  • the photoelectric signal processing control described above is based on the linear product control relationship defined in the first step, and the photoelectric signal is changed to realize the original unit pixel luminance value Yraw, so that the corresponding vein region pixel luminance evaluation value Ysp satisfies Yll ⁇ Ysp ⁇ Yhl's preset conditions.
  • the present invention also provides a method for performing security authentication using the above-described vein recognition imaging module for a mobile terminal, comprising the following steps:
  • the processor chip 5 configured with the security mode is connected to acquire the digitized vein image output by the image imaging sensor 15 (the vein image is acquired through the above steps 1, 2, and 3, and converted into a digitized vein image);
  • the processor chip 5 configured with the security mode performs a vein recognition algorithm and extracts vein characteristic information
  • the processor chip 5 configuring the security mode generates a vein feature template by using the vein feature information
  • the three vein feature templates are obtained for cross-certification comparisons of 1-2, 1-3, and 2-3, respectively; if the 2-3 authentication comparison results are the worst, then 1 is the best result for the specific vein feature template.
  • Standard vein feature template
  • the standard vein feature template is encrypted by a cryptographic system and stored in a processor chip configured in a secure mode as a key, and is guaranteed to be never exported and accessed;
  • the identity authentication comparison of the vein feature template is performed inside the processor chip 5 configured with the security mode, ensuring that the mobile terminal is safe from external attacks during the entire process of identity authentication.
  • the cryptography system is a known technique. As a whole purpose of the security authentication of the mobile terminal, the above method is indispensable.

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Abstract

L'invention concerne un dispositif de formation d'image de reconnaissance de veine pour l'authentification sécurisée d'un terminal mobile. Le dispositif de formation d'image de reconnaissance de veine comprend un dispositif de formation d'image de reconnaissance de veine disposé sur un terminal mobile. Le terminal mobile comprend une puce de processeur (5) ou autre. Le dispositif de formation d'image de reconnaissance de veine se compose d'une source lumineuse d'éclairement à LED infrarouge proche et d'un composant optique (1) à module de formation d'image de reconnaissance de veine. La source lumineuse d'éclairement à LED infrarouge proche est attaquée par un circuit d'attaque de courant de LED infrarouge proche (2). Le composant optique à module de formation d'image de reconnaissance de veine comprend un filtre optique infrarouge proche (11, 14) utilisé pour filtrer les rayons lumineux diffusés et réfléchis d'une source lumineuse d'éclairement à LED infrarouge proche, une lentille optique de formation d'image (12) utilisée pour focaliser les rayons lumineux filtrés par le filtre optique infrarouge proche, un capteur de formation d'image (15) utilisé pour former l'image des rayons lumineux focalisés par la lentille optique de formation d'image, et un substrat de module de formation d'image de reconnaissance de veine (16) utilisé pour effectuer une transmission sur des images du capteur de formation d'image. La puce de processeur (5) est en liaison de signal avec le circuit d'attaque de LED infrarouge proche (2) et le substrat de module de formation d'image de reconnaissance de veine (16).
PCT/CN2015/086222 2014-08-07 2015-08-06 Dispositif de formation d'image de reconnaissance de veine et procédé d'authentification sécurisée de terminal mobile Ceased WO2016019882A1 (fr)

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CN201410385354.2 2014-08-07
CN201410385354.2A CN104156649B (zh) 2014-08-07 2014-08-07 用于移动终端安全认证的静脉识别成像装置及方法

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