CN202771437U - Multi-modal identity authentication device based on biological characteristics of finger part - Google Patents
Multi-modal identity authentication device based on biological characteristics of finger part Download PDFInfo
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- CN202771437U CN202771437U CN 201220037504 CN201220037504U CN202771437U CN 202771437 U CN202771437 U CN 202771437U CN 201220037504 CN201220037504 CN 201220037504 CN 201220037504 U CN201220037504 U CN 201220037504U CN 202771437 U CN202771437 U CN 202771437U
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Abstract
The utility model provides a multi-modal identity authentication device based on biological characteristics of a finger part. The multi-modal identity authentication device based on the biological characteristics of the finger part is composed of a digital vein image collecting module, a dactylus print image collecting module, a finger print image collecting module, a finger induction switch, an embedded SOC authentication module, a control box, an input output interface and a power source module. The above modules, the finger induction switch and the input output interface are all installed on the control box. The digital vein image collecting module, the dactylus print image collecting module and the finger print image collecting module are connected with an image input port of the embedded SOC authentication module. Therefore, the collection of biological characteristics of veins, dactylus prints and finger prints is realized. The finger induction switch is connected with a GPIO interface of the embedded SOC authentication module, so that the detection of a finger is realized. The power source module is connected with the other modules, thereby providing requirement power for working. The multi-modal identity authentication device based on the biological characteristics of the finger part improves the safety performance of identity authentication and has a comparatively high practical value and a wide application range.
Description
Technical field
The utility model relates to a kind of multimode authentication device based on finger biologic characteristics, belongs to the biometrics identification technology field.
Background technology
At present, more universal based on the personal identification technology of human body biological characteristics, such as fingerprint recognition, recognition of face and iris authentication etc., but all exist feature stability not enough, the shortcoming that information easily is stolen and forges, poor stability; Fingerprint identification technology for example exists about 4% the user can't normal registration and identification, and fingerprint also is very easy to be stolen and copy; The vena identification technology is to utilize the vein blood vessel texture information of inside of human body as the personal identification feature, almost can't steal and forge, and can greatly improve the security of personal identification; And do not allow to be subject to the external factor impact, have better adaptability and stability.
The ultimate principle of vena identification is to utilize the relative musculature of oxygenated blood fluid that wavelength is had stronger absorption for the near infrared spectrum of 700-1000nm, utilize positive near infrared light source irradiation finger and gather the train of thought texture image that finger-image can collect the finger blood vessel by camera head, different light source design and light path design all can affect the vein train of thought texture image quality of collection, thus impact authentication effect.Although vein pattern is more stable than fingerprint, be not easy to be stolen and to forge, also there is following shortcoming, to cross such as finger temperature and low can have a strong impact on vein image quality, finger rocks or rotation can collect different images, thereby can reduce the security that refers to vena identification.
The phalangeal configurations authentication techniques show also have certain uniqueness through correlative study, so long as normal finger has obvious phalangeal configurations feature, there is not the problem that fingerprint recognition certain customers can't normal registration, it is more obvious, stable and be not easy to be stolen that feature is compared fingerprint, main shortcoming is that feature is relatively less, does not also carry out at present its uniqueness of large-scale practice test.
From security and the adaptability of practical application, also can satisfy the demand without any the biological characteristic authentication technology of individual event at present, multimode authentication is following developing direction; Experiment showed, security, adaptability and anti-forgery ability that multimode system can the Effective Raise identification, have very wide application prospect.
Summary of the invention
1, purpose: the purpose of this utility model provides a kind of multimode authentication device based on finger biologic characteristics, it selects vein, fingerprint and phalangeal configurations as the biological characteristic of authentication, need not to increase fingerprint recognition user's operation steps and the collection that use habit can be finished vein, fingerprint and phalangeal configurations biological characteristic; The utility model adopts modular design, can realize fingerprint, refer to that the combination in any of vein and three kinds of biological characteristics of phalangeal configurations carries out authentication.
2, technical scheme:
1) a kind of multimode authentication device based on finger biologic characteristics of the utility model, it is by referring to that vein image acquisition module 100, phalangeal configurations image capture module 200, fingerprint image acquisition module 300, finger inductive switch 400, embedded SOC authentication module 500, control enclosure 900, IO interface 800 and power module 700 form; Position annexation between them, signal trend are: above-mentioned all modules, finger inductive switch and IO interface all are installed on the control enclosure.Referring to that vein image acquisition module 100, phalangeal configurations image capture module 200 are connected with the fingerprint image acquisition module is connected with the image input interface of embedded SOC authentication module 500, realize the collection of vein, phalangeal configurations and fingerprint biological characteristic, finger inductive switch 400 is connected with the GPIO interface of embedded SOC authentication module 500, realizes the detection that finger is placed; Power module 700 is connected with each module and provides work required power supply for each module.Concrete annexation and signal trend are seen accompanying drawing 1 and accompanying drawing 2.
Described finger vein image acquisition module 100, this module is comprised of near-infrared LED light supply apparatus 101 and vein image acquisition device 102, the former is placed on control enclosure 900 upper end plates, the latter is placed on control enclosure 900 bottoms, they are connected with embedded SOC authentication module 500, embedded SOC authentication module 500 gathers vein image post analysis image, as crossing bright or crossing and secretly all can automatically adjust the brightness of near-infrared LED light supply apparatus 101 and the time shutter of vein image acquisition device 102, realize that high-quality near infrared refers to vein train of thought image acquisition; This near-infrared LED light supply apparatus 101 is the near-infrared luminous diode of 850nm, is arranged in parallel successively in order to make the finger in uniform light and to take full advantage of light source, be arranged to point above the side and apart from dorsal surfaces of fingers 4-8mm place, and is predetermined angular with the finger plane; In order to adapt to the different finger of size, the near infrared diode light-source brightness is adjustable, can be by the dynamic ON/OFF of PWM mode (width modulation) and brightness regulation; For strengthening the in uniform light of finger the right and left, be provided with near-infrared light source reflection unit 103, it is placed on opposite and the control enclosure upper end of near-infrared LED light supply apparatus 101, and parallel with near-infrared LED light supply apparatus 101, effect with reflect near infrared light, strengthen the finger in uniform light, this near-infrared light source reflection unit 103 is that mirror or the material with reflection ray effect are made; This vein image acquisition device 102 is comprised of camera lens, optical filter and CMOS/CCD sensor devices, and relation is therebetween: the position of optical filter is between camera lens and CMOS/CCD photosensitive sensor; This camera lens adopts mobile phone or USB cam lens; This optical filter adopts the 850nm bandpass filter, and can only see through wavelength is the near infrared light of 850nm; This CMOS/CCD sensor devices adopts CMOS or ccd sensor; It is positioned over centre position, control enclosure 900 bottom, is used for gathering finger middle part vein texture image.
Described phalangeal configurations image capture module 200, formed by led light source device 201 and phalangeal configurations image collecting device 202, they all are installed in the bottom position of control enclosure 900, wherein phalangeal configurations image collecting device 202 can be identical multiplexing with the vein image acquisition device 102 in the finger vein image acquisition module 100, is connected with embedded SOC authentication module 500; This led light source device 201 is comprised of light emitting diode, the irradiation finger belly upwards from control enclosure 900 bottoms, thus gather the phalangeal configurations images by phalangeal configurations image collecting device 202.
Described fingerprint image acquisition module 300 adopts finger print acquisition module, is connected with embedded SOC authentication module 500;
Described finger inductive switch 400 is one or two capacitance touch inductive switches; They are positioned over respectively third knuckle 605 and 2-5MM place, first knuckle 601 below, are connected with embedded SOC authentication module 500, can provide high level signal after finger 600 correct the placements.
Described embedded SOC authentication module 500 is system-on-a-chips that central processor CPU, internal memory RAM and storer FLASH form, and FLASH is used for storage program and user characteristics registration data; This module has parallel (such as Fig. 1) and two kinds of mode of operations of serial (such as Fig. 2) as the main control module of system; Parallel schema refers to that vena identification, finger print identifying and phalangeal configurations authentication have separately independently embedded SOC authentication module 500, and system can parallel acquisition and authentication vein, fingerprint and phalangeal configurations; Serial mode refers to that vein, fingerprint, phalangeal configurations share an embedded SOC authentication module 500, and system realizes in order phalangeal configurations, fingerprint and refers to collection and the authentication of vein.
Described control enclosure 900 is box box body structures, and all parts of the present utility model all are installed on it.Its top is the inverted L-shaped structure, is used for installing near-infrared luminous diode; Its middle part is provided with the groove of similar finger type, is used for placing and detecting finger; Its underpart is box shape and is used for installing each module, parts and cable etc.
Described IO interface 800 has the IO interface commonly used such as USB, UART, GPIO.
Described power module 700 has 5V, 3.3V, the Voltage-outputs such as 1.8, for each module provides work required power supply, specifically utilizes the 5V power supply of USB and LDO power conversion chip to change.
Wherein, the quantity of this near-infrared luminous diode is 4-8;
Wherein, the quantity of this light emitting diode is 2-4;
Wherein, the light emitting anger of this near-infrared luminous diode and finger plane are the predetermined angular of 1/2-1/3.
2) a kind of multimode identity authentication method based on finger biologic characteristics, the method comprise feature registration and feature comparison process.
Feature registration concrete steps are as follows:
Step 1, system starts;
Whether step 2 detects finger third knuckle 605 and correctly places;
Step 3 is opened led light source device 201 after correct the placement, gathers the phalangeal configurations image;
Step 4 is extracted the phalangeal configurations half-tone information, and is carried out image enhancing, binaryzation and thinning processing, extracts first knuckle line 602 and second knuckle line 604 relative position informations, as the phalangeal configurations characteristic information; Can also realize the accurate location of finger position according to the phalangeal configurations positional information; As extract first knuckle line and the failed then prompting user finger of second knuckle line placement mistake, need to reappose;
Step 5 gathers fingerprint image, analyzes fingerprint image quality, the feature that takes the fingerprint and according to the weight of fingerprint image quality definition fingerprint characteristic;
Step 6 is opened near-infrared LED light supply apparatus 101, gathers to refer to vein image;
Step 7 detects and to refer to vein image, as image cross dark or cross bright then adjust light-source brightness and after the time shutter Resurvey refer to vein image;
Step 8, shearing refers to the vein center sub-block, carries out figure image intensifying, filtering, normalization, binaryzation and refers to that vein pattern extracts;
Step 9 is preserved phalangeal configurations, fingerprint and is referred to vein pattern information;
Aspect ratio is as follows to concrete steps:
Step 1, system starts;
Whether step 2 detects finger third knuckle 605 and correctly places;
Step 3 is opened led light source device 201 after correct the placement, gathers the phalangeal configurations image;
Step 4 is extracted the phalangeal configurations half-tone information, and is carried out image enhancing, binaryzation and thinning processing, extracts first knuckle line 602 and second knuckle line 604 relative position informations, realizes the accurate location of finger position according to the phalangeal configurations positional information; As extract the failure of first knuckle line and second knuckle line then the prompting user finger place mistake, need to reappose, the accurate location of finger can Effective Raise refers to comparison speed and the authentication precision of vein;
Step 5 is carried out aspect ratio pair according to the position relationship of each streakline of phalangeal configurations and registered user's phalangeal configurations feature, and all alignment similarities are gathered N1 greater than the user of setting threshold for the user;
Step 6, gather fingerprint image, analyze fingerprint image quality, the feature that takes the fingerprint and according to the weight of fingerprint image quality definition fingerprint characteristic, and gather the user and to carry out fingerprint characteristic comparison among the N1, all alignment similarities are gathered N2 greater than the user of setting threshold for the user;
Step 7 is opened near-infrared LED light supply apparatus 101, gathers to refer to vein image;
Step 8 detects and to refer to vein image, as image cross dark or cross bright then adjust light-source brightness and after the time shutter Resurvey refer to vein image;
Step 9, shearing refers to the vein center sub-block, carries out figure image intensifying, filtering, normalization, binaryzation and refers to that vein pattern extracts, and gather the user and to carry out the vein pattern comparison among the N2, then compare successfully greater than setting threshold such as alignment similarity, otherwise compare unsuccessfully;
It is fit to ultra-large user capacity identification, is applicable to all user groups, has very high security.
3, advantage and effect: in the utility model, refer to that vena identification is core of the present utility model, adopt the light-source system and the authentication method that are different from existing finger vein authentication apparatus, can refer to the acquisition quality of vein image and authenticate effect by Effective Raise; Can effective integration finger print identifying and phalangeal configurations authentication techniques when realizing referring to vena identification, in following technical indicator important breakthrough is arranged:
Security can significantly reduce misclassification rate;
Universality almost can adapt to all groups;
The user experiences, can the Effective Raise percent of pass;
Forge difficulty, can significantly improve the difficulty that feature is stolen and forges;
The identification user capacity can significantly improve user capacity and accuracy that identification is used.
Description of drawings
Fig. 1 is the system chart of the utility model concurrent working pattern;
Fig. 2 is the system chart of the utility model work in series pattern;
Fig. 3 is the utility model near-infrared LED light supply apparatus principle of work schematic diagram;
Fig. 4 is each position name schematic diagram of finger in the utility model;
Fig. 5 is the structure drawing of device that the utility model refers to vena identification embodiment;
Fig. 6 is the device sectional view that the utility model refers to vena identification embodiment;
Fig. 7 is that the utility model refers to that vein phalangeal configurations bimodal merges the structure drawing of device of authentication embodiment;
Fig. 8 is that the utility model refers to that vein phalangeal configurations bimodal merges the device sectional view of authentication embodiment;
Fig. 9 is that the utility model refers to that vein fingerprint bimodal merges the structure drawing of device of authentication embodiment;
Figure 10 is that the utility model refers to that vein fingerprint bimodal merges the device sectional view of authentication embodiment
Figure 11 is that the utility model refers to that vein phalangeal configurations fingerprint three mode merge the structure drawing of device of authentication embodiment;
Figure 12 is that the utility model refers to that vein phalangeal configurations fingerprint three mode merge the device sectional view of authentication embodiment
Figure 13 is the utility model multi-modal fusion authentication feature registering flow path figure.
Figure 14 is that the utility model multi-modal fusion authentication aspect ratio is to process flow diagram
Concrete label is as follows among the figure:
100, vein image acquisition module 200, phalangeal configurations image capture module
300, fingerprint image acquisition module 400, finger inductive switch
500, embedded SOC authentication module 600, finger
700, power module 800, IO interface 900, control enclosure
101, near-infrared LED light supply apparatus 102, vein image acquisition device
103, near-infrared light source reflection unit
201, led light source device 202, phalangeal configurations image collecting device
401, third knuckle inductive switch 402, first knuckle (finger tip) inductive switch
601, first knuckle (finger tip) 602, first knuckle line
603, second knuckle 604, second knuckle line
605, third knuckle 606, fingerprint collecting zone
607, refer to the vein center sub-block
S101-S116, S201-S223 are the flow process sequence number
The luminous focusing angle of α near-infrared LED;
The illuminated centerline of β near-infrared LED and the angle of pointing the plane;
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, referring to the accompanying drawing preferred embodiment that develops simultaneously the utility model is further described.
Fig. 1 is the system chart of the utility model concurrent working pattern, referring to that vein acquisition module 100, phalangeal configurations acquisition module 200 are connected with finger print acquisition module respectively is connected with embedded SOC authentication module 500 independently, wherein be primary module with referring to the embedded SOC authentication module 500 that vein acquisition module 100 is connected, external IO interface 800 is provided, finger inductive switch 400 also only is connected with primary module, all the other embedded SOC authentication modules 500 are from module, are controlled by primary module by UART or other interfaces; The advantage of concurrent working pattern refers to that vena identification, phalangeal configurations authentication and finger print identifying can carry out synchronously, and authentication is quick, and shortcoming is that cost is higher, and system is comparatively complicated, and is unfavorable for device miniaturization.Above-mentioned all modules, finger inductive switch 400 and input and output connect 800 and all are installed on the control enclosure 900.
Concrete principle of work is as follows:
When primary module detects finger inductive switch 400 for high level, expression has finger to insert, give from module by the communication interface sending controling instruction, after receiving steering order, module gathers phalangeal configurations and fingerprint image, and the complete independently image is processed and verification process, primary module gathers immediately after sending steering order and refers to vein image, finish synchronously to refer to that vein image is processed and authentication, and the authentication result of comprehensive phalangeal configurations and fingerprint provides the final authentication result.
Fig. 2 is the system chart of the utility model work in series pattern, refers to that vein acquisition module 100, phalangeal configurations acquisition module 200 and finger print acquisition module 300 unifications are connected to embedded SOC authentication module 500.Refer to that vena identification, phalangeal configurations authentication and finger print identifying sequentially carry out, advantage is that cost is low, and equipment volume is little, and shortcoming is that authentication speed is slower.Above-mentioned all modules, finger inductive switch 400 and IO interface 800 all are installed on the control enclosure 900.
Fig. 3 is the utility model near-infrared LED light supply apparatus 101 principle of work schematic diagram, employing be one-sided luminous irradiation, opposite side reflection light filling mode.Near-infrared LED light supply apparatus 101 mainly is made of two parts, a part is near-infrared luminous LED, another part is the reflection facade, near-infrared luminous LED adopts the near-infrared LED with focusing function, luminous focusing angle [alpha] is that 30 degree are to 40 degree, the illuminated centerline of near-infrared LED and finger plane angled β ≈ α/2, there is 80% light quantity shine directly into finger for the finger of normal size, other has the light quantity about 20% to shine the another side of finger by the reflection facade, advantage is that finger is placed the custom nature, the finger in uniform light, thereby can not occur both sides highlighted and on one side the dark situation in bright one side affect picture quality, can also effectively reduce plant bulk.
Fig. 4 is finger each position name schematic diagram in the utility model, every finger has five parts: first knuckle 601(fingerprint part), first knuckle line 602(first knuckle and second knuckle boundary), second knuckle 603, second knuckle line 604(second knuckle and third knuckle boundary), third knuckle 605.Wherein the fingerprint collecting zone is 606, refers to that the vein center sub-block is 607, refers to that vein center sub-block 607 has comprised first knuckle line and second knuckle line.
See that Fig. 5 and Fig. 6 refer to vein single mode authentication embodiment: be fit on a small scale user capacity identification
Fig. 5 and Fig. 6 are respectively the present embodiment and refer to vein single mode authenticate device structural drawing and sectional view, near-infrared LED light supply apparatus 101 is above the left side of finger, third knuckle inductive switch 401 and first knuckle inductive switch 402 are respectively at the 2-5mm place, below of third knuckle (referring to root) 605 and first knuckle (finger tip) 601, what sensor is finger inductive switch 400 usefulness there is no specific limited, in all embodiment of the present utility model, all adopt the touch sensor of electrostatic capacitive, electric capacity can change when the finger proximity transducer, sensor can send high level signal when capacitance variations reaches certain threshold value, and then can detect and whether have finger to place, only have to detect simultaneously and just think to point when third knuckle inductive switch 401 and first knuckle inductive switch 402 all be high level signal and place.Refer to vein image acquisition device 102 and embedded SOC authentication module 500 on the same circuit board, refer to that vein image acquisition device 102 carries out imaging by the near infrared light that receives the finger transmission.
Embedded SOC authentication module 500 is connected with the first knuckle inductive switch with third knuckle inductive switch 401 and is connected, are connected with the near-infrared LED light supply apparatus with finger vein image acquisition device 102 simultaneously and are connected, after detecting the finger placement by finger inductive switch 400, embedded SOC authentication module 500 can be opened near-infrared LED light supply apparatus 101 and refer to vein image by referring to that vein image acquisition device 102 gathers; Finger for different thicknesses, if time shutter one rule of the intensity of light source and cmos sensor vein image can occur referring to and cross dark and excessively bright situation, need to be according to the finger vein image grey level histogram dynamic adjustments intensity of light source and the CMOS time shutter that gather, to adapt to dissimilar finger, in all embodiment of the present utility model, all adopt the PWM(width modulation) mode control the brightness of near-infrared LED light supply apparatus, improve dutycycle and then reduce light-source brightness, and then image is dimmed, reduce dutycycle and then strengthen light-source brightness, and then image brightens; By I2C CMOS exposure register is set directly and adjusts the time shutter, the time shutter strengthens then that image brightens, and reduces that then image is dimmed the time shutter.
If picture quality meets the demands, then carry out finger edge and detect, location vein center sub-block, the figure image intensifying, filtering, normalization, binaryzation and feature extraction, and carry out feature registration or aspect ratio equity according to user instruction.Then vena identification is successful greater than setting threshold such as the feature alignment similarity.
See that Fig. 7 and Fig. 8 refer to that vein phalangeal configurations bimodal merges authentication embodiment: be fit to fairly large user capacity identification and the application higher to safety requirements;
Fig. 7 and Fig. 8 are respectively the present embodiment and refer to that vein phalangeal configurations bimodal merges authenticate device structural drawing and sectional view, general structure is identical with finger vein single mode authenticate device embodiment, difference is to have increased led light source device 201 at the circuit board at embedded SOC authentication module 500 places, led light source device 201 is subjected to embedded SOC authentication module 500 controls, irradiation refers to the belly position, and the light that phalangeal configurations image collecting device 202 receives the reflection of finger belly carries out imaging.The present embodiment middle finger joint print image harvester 202 shares with referring to vein image acquisition device 102, interferes with each other for fear of light source, need to control in real time light source.
After finger inductive switch 400 detected the finger placement, embedded SOC authenticate device 500 can at first be opened led light source device 201(near-infrared LED light supply apparatus 101 and be in closed condition), gather the phalangeal configurations image, and carry out gray processing, rim detection, normalization, the figure image intensifying, filtering, binaryzation, refinement, the operations such as feature extraction are extracted first knuckle line 602 and second knuckle line 604 positional informations, if the phalangeal configurations feature does not exist, then be judged as illegal finger, provide information; If the phalangeal configurations feature is legal, accurately refer to vein center sub-block 607 in the location according to the positional information of phalangeal configurations, and compare with the phalangeal configurations feature of registration simultaneously, all alignment similarities are gathered N1 greater than the user of setting threshold for the user.And then refer to the vein comparison provide the final authentication result according to the similarity that refers to the vein comparison.Refer to that specifically the vena identification flow process refers to together vein single mode authentication embodiment, is not described in detail in this.
See that Fig. 9 and Figure 10 refer to that vein fingerprint bimodal merges authentication embodiment: be fit to fairly large user capacity identification, the colony that fingerprint quality is not high also can use, the application that safety requirements is higher;
Fig. 9 and Figure 10 are respectively the present embodiment and refer to that vein fingerprint bimodal merges authenticate device structural drawing and sectional view, general structure is identical with finger vein single mode authenticate device embodiment, difference is to replace first knuckle inductive switch 402 with fingerprint image acquisition module 300, and fingerprint image acquisition module 300 is connected with embedded SOC authentication module 500; Fingerprint image acquisition module 300 is well-known components, does not elaborate at this.
After third knuckle inductive switch 401 detects the finger placement, embedded SOC authentication module 500 gathers first fingerprint image, and fingerprint image carried out quality assessment and the feature that takes the fingerprint, carrying out fingerprint comparison according to the fingerprint characteristic of registration obtains the user and gathers N1, and then refer to the vein comparison provide the final authentication result according to the similarity that refers to the vein comparison.Refer to that specifically the vena identification flow process refers to together vein single mode authentication embodiment, is not described in detail in this.
See that Figure 11 and Figure 12 refer to that vein phalangeal configurations fingerprint three mode merge authentication embodiment: be fit to ultra-large user capacity identification, the colony that fingerprint quality is not high also can use, the application that safety requirements is very high;
Figure 11 and Figure 12 are respectively the present embodiment and refer to that vein phalangeal configurations fingerprint three mode merge authenticate device structural drawing and sectional view, general structure is identical with finger vein fingerprint bimodal fusion authentication embodiment, difference is to have increased led light source device 201 at the circuit board at embedded SOC authentication module 500 places, led light source device 201 is subjected to embedded SOC authentication module 500 controls, irradiation refers to the belly position, and the light that phalangeal configurations image collecting device 202 receives the reflection of finger belly carries out imaging.The present embodiment middle finger joint print image harvester 202 shares with referring to vein image acquisition device 102, interferes with each other for fear of light source, need to control in real time light source.
Concrete phalangeal configurations, fingerprint and refer to the vein acquisition principle and verification process and finger vein phalangeal configurations bimodal merge that to authenticate embodiment identical are not described in detail in this;
The below does the explanation in a nearlyer step to refer to vein phalangeal configurations fingerprint three mode fusion authentication embodiment feature registration and feature comparison method:
Figure 13 is that the phalangeal configurations fingerprint refers to that vein three mode merge the feature registering flow path figure of authentication embodiment.
Whether S101 detects finger and correctly places, and detects specifically whether third knuckle inductive switch 401 is high level, if for high level then think that finger is correct and place, as be low level, the then incorrect placement of finger;
S102 only detects and just continues registration after finger is correctly placed, otherwise detects always;
S103, when detecting the finger placement, embedded SOC authentication module 500 is opened led light sources 201 irradiation finger bellies (near-infrared LED light source 101 closed conditions);
S104 opens led light source device 201 rear by image collecting device 102 or 202 collection phalangeal configurations images;
S105 closes led light source device 201 after having gathered the phalangeal configurations image;
S106 extracts the phalangeal configurations characteristic information, also needs to do the necessary image such as image pre-service, figure image intensifying, filtering, binaryzation and refinement and process before extracting the phalangeal configurations characteristic information;
S107 then gathers fingerprint image after having extracted the phalangeal configurations feature;
S108, the fingerprint image quality evaluation is specifically carried out the fingerprint image quality evaluation according to the fingerprint image sharpness and the integrity degree that gather, and defines the weight of fingerprint characteristic according to evaluation result;
S109 meets the requirements such as fingerprint image quality, and feature then takes the fingerprint;
S110 finishes the collection and the feature extraction that refer to vein after phalangeal configurations and fingerprint characteristic extract, must open near-infrared LED light supply apparatus 101 before collection refers to vein image;
S111, collection refers to vein image, refers to vein image by referring to that vein image acquisition device 102 gathers;
S112 estimates and to refer to vein image quality, for too small or cross big strong hand and refer to that the finger vein image that gathers can cross brightly or excessively dark, need to adjust for dissimilar finger, improves the finger vein image quality that gathers;
S113 judges whether picture quality meets the requirements, and such as the undesirable Resurvey that needs, specifically estimates according to the histogram information that refers to vein image, then thinks that such as the main body gray space image meets the requirements within claimed range;
S114 is if the undesirable Resurvey that needs of image is then adjusted light-source brightness and CMOS time shutter Resurvey and evaluation according to the Gray Histogram spatial information;
S115 meets the requirements such as picture quality, then positions and shears according to the phalangeal configurations positional information to refer to vein center sub-block 607, and through the figure image intensifying, filtering, the image treatment schemees such as normalization and binaryzation, at last extraction refers to vein pattern information;
S116, phalangeal configurations, fingerprint and refer to vein pattern information all extract finish after the characteristic information of all extractions of preservation, in order to aspect ratio to the time use.
Figure 14 is that the phalangeal configurations fingerprint refers to that vein three mode merge the aspect ratio of authentication embodiment to process flow diagram.
Whether whether S201 detects finger and correctly places, needed to detect finger and correctly place before authentication gathers image;
Whether correctly S202 only detects finger and correctly could begin authentication after the placement, otherwise detect finger placement always;
S203, finger is correct to be placed if detect, and then opens led light source 201(near-infrared LED light source 101 closed conditions);
S204 opens led light source 201 rear by image collecting device 102/202 collection phalangeal configurations image;
S205 closes led light source 201 after having gathered the phalangeal configurations image;
S206 extracts the phalangeal configurations characteristic information, also needs to do the necessary image such as image pre-service, figure image intensifying, filtering, binaryzation and refinement and process before extracting the phalangeal configurations characteristic information;
S207 compares according to the threshold value of setting according to the phalangeal configurations feature of the phalangeal configurations feature of extracting and registration, obtains all users that are higher than setting threshold and gathers N1;
S208 gathers fingerprint image;
S209, the fingerprint image quality evaluation is specifically carried out the fingerprint image quality evaluation according to the fingerprint image sharpness and the integrity degree that gather, and defines the weight of fingerprint characteristic according to evaluation result;
S210 is such as the fingerprint image quality characteristic information that then takes the fingerprint that meets the requirements;
S211 gathers the user and to carry out fingerprint characteristic comparison among the N1 and obtain the user and gather N2;
S212 opens near-infrared LED light source 101;
S213 refers to vein image by image collecting device 102 collections;
S214, evaluation refers to vein image quality;
S215 crosses bright or excessively secretly needs Resurvey such as image;
S216 adjusts light-source brightness and CMOS exposure register Resurvey image according to image luminance information;
S217 refers to vein center sub-block 607 according to phalangeal configurations positional information location and shearing;
S218 refers to the image processing operations such as vein image enhancing, filtering, normalization and binaryzation;
S219 extracts and to refer to that the vein spectrum signature compares;
S220 gathers the user and to refer to vein pattern comparison among the N2;
S221, if alignment similarity greater than setting threshold, authentication success then, otherwise authentification failure;
S222, authentication success;
S223, authentification failure;
Above embodiment is the described technical scheme of unrestricted the utility model and embodiment in order to the utility model to be described only, should be pointed out that for those of ordinary skill in the art to make amendment or on an equal basis replacement to the utility model; And all do not break away from technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.
For example, in the above-described embodiments, the fingerprint collecting recognition device is changed to the capacitive transducer fingerprint identification device, or change fingerprint identification device mounting means all can be realized same effect.
Claims (4)
1. multimode authentication device based on finger biologic characteristics is characterized in that: it is by referring to that vein image acquisition module (100), phalangeal configurations image capture module (200), fingerprint image acquisition module (300), finger inductive switch (400), embedded SOC authentication module (500), control enclosure (900), IO interface (800) and power module (700) form; Above-mentioned all modules, finger inductive switch and IO interface all are installed on the control enclosure, finger vein image acquisition module (100), phalangeal configurations image capture module (200) are connected 300 with the fingerprint image acquisition module) be connected with the image input interface of embedded SOC authentication module (500), finger inductive switch (400) is connected with the GPIO interface of embedded SOC authentication module (500), and power module (700) is connected with each module;
Described finger vein image acquisition module (100), formed by near-infrared LED light supply apparatus (101) and vein image acquisition device (102), the former is placed on control enclosure (900) upper end plate, the latter is placed on control enclosure (900) bottom, and they are connected with embedded SOC authentication module (500); This near-infrared LED light supply apparatus (101) is the near-infrared luminous diode of 850nm, is arranged at above the finger side and apart from dorsal surfaces of fingers 4-8mm place to be arranged in parallel successively, and is predetermined angular with the finger plane; Near-infrared light source reflection unit (103) is that mirror or the material with reflection ray effect are made, and it is placed on opposite and the control enclosure upper end of near-infrared LED light supply apparatus (101), and parallel with near-infrared LED light supply apparatus (101); This vein image acquisition device (102) is comprised of camera lens, optical filter and CMOS/CCD sensor devices, and the position of optical filter is between camera lens and CMOS/CCD photosensitive sensor; This camera lens adopts mobile phone or USB cam lens; This optical filter adopts the 850nm bandpass filter; This CMOS/CCD sensor devices adopts CMOS or ccd sensor, and it is positioned over centre position, control enclosure (900) bottom;
Described phalangeal configurations image capture module (200), formed by led light source device (201) and phalangeal configurations image collecting device (202), they all are installed in the bottom position of control enclosure (900), wherein phalangeal configurations image collecting device (202) is identical multiplexing with the vein image acquisition device (102) in referring to vein image acquisition module (100), is connected with embedded SOC authentication module (500); This led light source device (201) is comprised of light emitting diode, and upwards belly is pointed in irradiation from control enclosure (900) bottom, thereby gathers the phalangeal configurations image by phalangeal configurations image collecting device (202);
Described fingerprint image acquisition module (300) adopts finger print acquisition module, is connected with embedded SOC authentication module (500);
Described finger inductive switch (400), it is one or two capacitance touch inductive switch, they are positioned over respectively third knuckle (605) and 2-5MM place, first knuckle (601) below, be connected with embedded SOC authentication module (500), can provide high level signal after the correct placement of finger (600);
Described embedded SOC authentication module (500) is the system-on-a-chip that central processor CPU, internal memory RAM and storer FLASH form; This module has parallel and two kinds of mode of operations of serial; Parallel schema refers to that vena identification, finger print identifying and phalangeal configurations authentication have separately independently embedded SOC authentication module (500); Serial mode refers to that vein, fingerprint, phalangeal configurations share an embedded SOC authentication module (500);
Described control enclosure (900) is a box box body structure, and all parts of device all are installed on it; Its top is the inverted L-shaped structure; Its middle part is provided with the groove of similar finger type; Its underpart is box shape;
Described IO interface (800) is USB, UART, GPIO IO interface commonly used;
Described power module (700) is to utilize the 5V power supply of USB and LDO power conversion chip to change.
2. a kind of multimode authentication device based on finger biologic characteristics according to claim 1 is characterized in that: the quantity of this near-infrared luminous diode is 4-8.
3. a kind of multimode authentication device based on finger biologic characteristics according to claim 1 is characterized in that: the quantity of this light emitting diode is 2-4.
4. a kind of multimode authentication device based on finger biologic characteristics according to claim 1 is characterized in that: the light emitting anger of this near-infrared luminous diode and finger plane are the predetermined angular of 1/2-1/3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220037504 CN202771437U (en) | 2012-02-06 | 2012-02-06 | Multi-modal identity authentication device based on biological characteristics of finger part |
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| CN 201220037504 CN202771437U (en) | 2012-02-06 | 2012-02-06 | Multi-modal identity authentication device based on biological characteristics of finger part |
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| CN106203352A (en) * | 2016-07-13 | 2016-12-07 | 中国民航大学 | A kind of spherical granulation of finger multi-modal biological characteristic and matching process |
| CN106251449A (en) * | 2016-08-08 | 2016-12-21 | 深圳市释金石科技有限公司 | There is the door lock referring to hand vein recognition |
| CN106330658A (en) * | 2015-06-23 | 2017-01-11 | 腾讯科技（深圳）有限公司 | Internet-based information association method, terminal, server and system |
| CN107025422A (en) * | 2015-11-20 | 2017-08-08 | 台瀚科技股份有限公司 | Reflective fingerprint identification system |
| CN109711328A (en) * | 2018-12-25 | 2019-05-03 | 上海众源网络有限公司 | A kind of face identification method, device and electronic equipment |
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2012
- 2012-02-06 CN CN 201220037504 patent/CN202771437U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106330658A (en) * | 2015-06-23 | 2017-01-11 | 腾讯科技（深圳）有限公司 | Internet-based information association method, terminal, server and system |
| CN107025422A (en) * | 2015-11-20 | 2017-08-08 | 台瀚科技股份有限公司 | Reflective fingerprint identification system |
| CN106203352A (en) * | 2016-07-13 | 2016-12-07 | 中国民航大学 | A kind of spherical granulation of finger multi-modal biological characteristic and matching process |
| CN106203352B (en) * | 2016-07-13 | 2019-04-12 | 中国民航大学 | A kind of finger multi-modal biological characteristic spherical shape granulation and matching process |
| CN106251449A (en) * | 2016-08-08 | 2016-12-21 | 深圳市释金石科技有限公司 | There is the door lock referring to hand vein recognition |
| CN109711328A (en) * | 2018-12-25 | 2019-05-03 | 上海众源网络有限公司 | A kind of face identification method, device and electronic equipment |
| CN109711328B (en) * | 2018-12-25 | 2021-07-30 | 上海众源网络有限公司 | Face recognition method and device and electronic equipment |
| CN110032937A (en) * | 2019-03-11 | 2019-07-19 | 浙江工业大学 | A kind of finger vena and phalangeal configurations bi-mode biology collection apparatus system |
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