CN104933394B - Person authentication device and finger vein authentication apparatus - Google Patents
Person authentication device and finger vein authentication apparatus Download PDFInfo
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- CN104933394B CN104933394B CN201510004872.XA CN201510004872A CN104933394B CN 104933394 B CN104933394 B CN 104933394B CN 201510004872 A CN201510004872 A CN 201510004872A CN 104933394 B CN104933394 B CN 104933394B
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Abstract
The present invention provides a kind of person authentication device and finger vein authentication apparatus, and the image suitable for certification can be shot to optimum position irradiation light for the organism of all size.Person authentication device includes: finger mounting table (5) of the mounting surface with opening portion (20) in mounting finger；In the finger mounting table (5), finger longitudinal direction arrangement and from the multiple light sources of oblique direction finger (50)；The shoot part (4) that the light from light source after transmiting from finger is shot via opening portion (20) in shell；The authentication processing portion (10) that the feature extracted with the vein image to the finger obtained from shoot part is compareed with pre-stored Biont information, there is the light shielding part (22) that shading is carried out to the light from multiple light sources (50) in plane identical with mounting surface, each light source (50) is different at a distance from light shielding part (22).
Description
Technical field
The present invention relates to the person authentication device and finger vein authentication apparatus for organism, in particular to utilize to from life
The technology that vascular patterns obtained from light after object transmission is shot are authenticated.
Background technique
In recent years, the safety of personal information receives attention.As personal authentication's technology of protection safety, biological characteristic is recognized
Card is of concern.Biological characteristic authentication is the technology that the Biont information of user is authenticated, and convenience and confidentiality are excellent
It is good.
As existing biological characteristic authentication, it is known to use fingerprint, iris, sound, face, the back of the hand vein or refer to vein
Certification.Wherein, using in the biological characteristic authentication of vein, because using the internal information of organism, anti-counterfeiting is excellent.
Explanation utilizes the person authentication device for referring to vein below.When carrying out personal authentication using finger vein authentication apparatus, use
Finger is placed in authentication device first in family.Finger vein authentication apparatus irradiates infrared light to finger.Infrared light is dissipated in finger interior
After penetrating, to outer transmissive.Then, finger vein authentication apparatus shoots the infrared light for the palmar side for being transmitted through finger.This
When, the hemoglobin infrared lights more than the tissue resorption of surrounding in blood.Therefore, the light for being transmitted through the palmar side of finger has
Because of the contrast differences for the unbated strong light that the dim light decayed by vein segment and never veiny part pass through.By
This, it is visual in the blood vessel (referring to vein) of the palmar side of finger being subcutaneously distributed in the image of finger vein authentication apparatus shooting
Turn to the pattern (finger vein pattern) of darker shade.Finger vein authentication apparatus has pre-registered the feature of the finger vein pattern, leads to
That crosses between the finger vein pattern of the user shown in when finding out certification and the feature pre-registered related carries out personal authentication.
Conventional example as this finger vein authentication apparatus, it is known that the authentication device recorded in such as patent document 1.The public affairs
In report, describes the slimming for authentication device and use the side for carrying out personal authentication by the image that microlens array is shot
Method.
In addition, the left and right finger for describing the finger of the left and right of the finger with mounting certification object is put in patent document 2
Platform is set, configures illuminating light source in the finger mounting table of left and right.In addition, the light source component of 2 kinds of angles of configuration is pressed as light source
Finger switching is lighted.
Patent document 1: Japanese Unexamined Patent Publication 2008-036058 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2010-097483 bulletin
Summary of the invention
As described above, as in the organism authentication apparatus using transmitted light to the organism of all size all with ideal
Angular illumination light method, it is known that the method for the different light source of configuration setting angle.
But there is no the determining method of the setting angle of open multiple light sources in patent document 1, patent document 2.In addition,
The setting angle for only changing light source, remains oriented organism and has irradiated and cause dysgenic light to shooting or can not irradiate
For shoot organism it is an adequate amount of smooth the problems such as.Therefore can not shooting clear vein image, authentication precision reduce.
The present invention is invention in order to solve the above problems, and it is an object of the present invention to provide a kind of person authentication device and finger vein are recognized
Card device can shoot the image suitable for certification for the organism of all size to optimum position irradiation light.
In order to achieve the above objectives, person authentication device of the invention is characterized in that, comprising: shell (such as finger is placed
Platform 5), there is opening portion in the mounting surface of mounting finger；Multiple light sources, in shell finger longitudinal direction arrangement and
From oblique direction finger；Shoot part, in shell via opening portion to the light from light source after being transmitted from finger into
Row shooting；With processing unit (such as authentication processing portion 10), the feature that the vein image of the finger obtained from shoot part is extracted
It is compareed with pre-stored Biont information, has in plane identical with mounting surface and the light from multiple light sources is carried out
The light shielding part of shading, each light source at a distance from light shielding part (such as distance k1 shown in fig. 6, distance k2 shown in Fig. 7) are different.
According to the present invention, the figure suitable for certification can be shot to optimum position irradiation light for the organism of all size
Picture.
Detailed description of the invention
Fig. 1 is the figure for indicating the finger vein authentication system of first embodiment, and (a) is to indicate integrally-built figure, is (b)
Indicate the figure as the structure inside the memory and storage device of the storage unit in finger vein authentication system.
Fig. 2 is the figure for indicating the finger intravenous data acquisition device of first embodiment, and (a) is top view, is (b) that placed
Top view when finger (when mounting) is (c) Section A-A figure, is (d) section B-B figure.
Fig. 3 is the figure for indicating the relationship of light source and light shielding part.
The case where Fig. 4 is the figure for indicating to be irradiated in the case that the setting angle of light source is big, and (a) is thick finger be (b)
The case where thin finger.
The case where Fig. 5 is the figure for indicating to be irradiated in the case that the setting angle of light source is small, and (a) is thick finger be (b)
The case where thin finger.
Fig. 6 is the figure for indicating the example of narrow shading light source unit (first light source unit).
Fig. 7 is the figure for indicating the example of wide shading light source unit (second light source unit).
Fig. 8 is the figure for indicating to refer to the other examples of intravenous data acquisition device, and (a) is that each light source all has opening portion
Situation, the case where (b) being equipped with multiple light sources.
Fig. 9 is the figure for indicating the finger intravenous data acquisition device of second embodiment, and (a) is top view, is (b) to have loaded hand
The top view of the case where finger is (c) Section A-A figure, is (d) section B-B figure.
Figure 10 is the figure for indicating to refer to the other examples of intravenous data acquisition device, and (a) is the insufficient situation of shading, (b)
It is the abundant situation of shading.
Figure 11 is the figure for indicating the finger intravenous data acquisition device of third embodiment, and (a) is top view, is (b) mounting
The top view of the case where finger, is (c) Section A-A figure, is (d) section B-B figure.
Figure 12 is the flow chart for indicating registration process.
Figure 13 is the flow chart for indicating authentication processing.
Figure 14 is the flow chart for indicating light source selection processing.
Figure 15 is the flow chart for indicating the light quantity adjustment processing of first embodiment.
Figure 16 is the flow chart for indicating the light quantity adjustment processing of the 4th embodiment.
Specific embodiment
Below with reference to the attached drawing embodiment that the present invention will be described in detail.
<<first embodiment>>
Fig. 1 is the figure for indicating the finger vein authentication system of first embodiment, and (a) is to indicate integrally-built figure, is (b)
Indicate the figure of the internal structure of the memory and storage device as the storage unit in finger vein authentication system.Fin- ger vein authentication system
System 80 (person authentication devices) include for image needed for obtaining personal authentication finger intravenous data acquisition device 2, image it is defeated
Enter portion 18, authentication processing portion 10, storage device 14, display unit 17, information input unit 19, audio output unit 6 and power supply unit 15.
Refer to that intravenous data acquisition device 2 includes the light source 50 for referring to that vein is for shooting, shoot part 4, has for placing finger
Mounting surface finger mounting table 5 (shell, finger mounting table).Light source 50 is, for example, infrared light-emitting diode (LED:Light
Emitting Diode), infrared light is irradiated to the finger 1 placed on finger mounting table 5.In finger mounting table 5, have to red
The light shielding part 22 (being described in detail in Fig. 2) of outside line progress shading.Shoot part 4 is, for example, cmos sensor, to the finger 1 of placement
It is shot.
Image input unit 18 inputs the image that shoot part 4 is shot to the authentication processing portion 10 for playing the role of processing unit.Wherein,
The processing of the image contract blood-vessel pattern image shot from shoot part 4 can also be carried out using in image input unit 18, to recognizing
Demonstrate,prove the structure for the blood-vessel pattern image that the input of processing unit 10 is extracted.
In addition it is also possible to be integrally formed the image input unit 18 with intravenous data acquisition device 2 is referred to, it is configured to vein figure
As draw-out device, image input unit 18 can also be integrally constituted with authentication processing portion 10.
Authentication processing portion 10 include CPU (Central Processing Unit) 11 (central processing departments), memory 12,
Various interfaces (IF:Interface) 13.CPU11 by execute memory 12 in store program (such as registration procedure 100 (ginseng
Examine Figure 12), authentication procedure 120 (with reference to Figure 13)) and carry out various processing.Memory 12 temporarily stores the journey of CPU execution
Sequence.In addition, memory 12 stores the image inputted from image input unit 18.The device of the outside in interface 13 and authentication processing portion 10
Connection.Specifically, interface 13 and finger intravenous data acquisition device 2, storage device 14, display unit 17, information input unit 19, sound
The connection such as sound output section 6, image input unit 18.
The registration data 30 and registration procedure 100, authentication procedure 120 of user has been stored in advance in storage device 14.Registrating number
It is information for checking user according to 30, the e.g. image etc. of finger vein pattern.The image of finger vein pattern is will be in finger
Palmar side the blood vessel (referring to vein) being subcutaneously distributed be shot for darker shade pattern image.
Display unit 17 is, for example, liquid crystal display etc., shows the information received from authentication processing portion 10.Information input unit
19 be, for example, keyboard etc., sends information input by user to authentication processing portion 10.Audio output unit 6 is, for example, loudspeaker etc.,
The information received from authentication processing portion 10 is issued with sound.Power supply unit 15 is dry cell or external power supply, is supplied for driving
Refer to the electric power of intravenous data acquisition device 2 and authentication processing portion 10.
In finger vein authentication system 80, for user when referring to that intravenous data acquisition device 2 places finger 1, vein is for shooting
Light source 50 is lighted, and the vein image of finger is shot.Light source 50 is to 1 irradiation light of finger.The light of irradiation finger 1 scattering-in,
It is incident to shoot part 4 from the light after the transmission of finger 1.Incident light photographe portion 4 is transformed to electric signal, is imported into and recognizes as image
Demonstrate,prove processing unit 10.The image storage of importing is in memory 12.
Then, as shown in Fig. 1 (b), the registration data 30 and registration procedure 100, authentication procedure that are saved in storage device 14
120 are saved in memory 12 from storage device 14.In addition, CPU11 is according to the authentication procedure 120 saved in memory 12, root
Authentication data 40 is generated according to input picture, progress is compareed with registration data 30.
In control treatment, the finger placement location that is found out based on authentication processing portion 10 as a result, to registration data and certification
The position deviation of data is modified.Later, it is related to authentication data to find out registration data.Sentenced according to the relevant value found out
It is fixed whether consistent with registered data.Individual is authenticated using the judgement result.Authentication result display unit 17 show,
Or sound notification is used from audio output unit 6.
Fig. 2 is the figure for indicating the finger intravenous data acquisition device of first embodiment, and (a) is top view, is (b) to place hand
Top view when finger (when mounting) is (c) Section A-A figure, is (d) section B-B figure.
Refer in intravenous data acquisition device 2, is provided with the finger mounting table 5 for placing the finger of certification object for user.
In finger mounting table 5, there is the opening portion 20 of mounting finger in center, there is light source 50 in the both sides of opening portion 20
Opening portion 26.Multiple finger veins light source 50 for shooting is provided in opening portion 26.
In opening portion 20, infra-red transmitting filter (not shown) can be set in a manner of covering opening portion 20.Pass through
Infra-red transmitting filter is set, can prevent the unwanted light other than infrared light from entering in device.Furthermore it is possible to prevent dust
In the foreign body from entering such as waste.Infra-red transmitting filter can be set in the position than low several millimeters of the degree of finger mounting table 5
It sets, does not contact finger 1 infrared through optical filter.Thereby, it is possible to prevent from pressing because of finger that vascular patterns is caused to disappear or deform.
Furthermore it is possible to which spot is prevented to be attached on infra-red transmitting filter.
The underface of opening portion 20 is provided with shoot part 4.When placing finger 1, the light source that is made of multiple light sources element
50 pairs of fingers 1 irradiate infrared light.The light of irradiation scatters when reaching finger interior to all directions.In the light that finger interior scatters
A part reaches near the top of opening portion 20, and then part of it advances from the inside of finger to the external of finger.The light is logical
Opening portion 20, infra-red transmitting filter are crossed, photographe portion 4 is shot.Because the light penetrates the palm of finger 1 from the inside of finger 1
The surface of side is not decayed so having because of what the dim light and never veiny part decayed by vein segment passed through
Strong light contrast differences.To be mirrored in image positioned at the part area of the surface of opening portion 20 when being shot to the light
The finger vein pattern image in domain.
It is quiet that the partial region of the finger 1 positioned at the top of opening portion 20, the finger for the part that is taken are shot for clarity
Arteries and veins pattern needs to meet optical condition below.Firstly, to make the skin surface irradiation outside finger to the part that is taken
The reflected light of light is not taken, that is, to make not reach in the presence of referring to that the scattering light of the depth of vein is not taken.Condition is not satisfied
In the case where, the light of the information without finger vein pattern can make to refer to that vein segment and the contrast of bio-tissue furthermore drop
It is low.In turn, because the unwanted image such as fold of finger surface can clearly be mirrored, finger vein pattern is difficult to be seen
It examines.Then, in order to more clearly from shoot vein pattern, needing can be only to as reference object using the light that projects from light source 50
Organism higher position (such as close to the position of nail-side) irradiation mode, adjust the configuration of light source.
In present embodiment, the setting position of vein light source 50 for shooting is the region (length of finger for placing finger 1
Axis direction) left and right sides.The height of setting is height identical with the upper surface of finger mounting table 5 or than finger mounting table 5
Low position.In addition, the setting angle [alpha] of light source 50 is 0 degree to 90 degree of range, (Fig. 2 is referred to inclination top irradiation light
(c)).In turn, as shown in Fig. 2 (a), position between opening portion 20 and opening portion 26, with the portion for the light that can block light source 50
Part manufactures (hereinafter referred to as light shielding part 22).
As shown in Fig. 2 (a), light shielding part 22 is narrow in the width of the part shading light part of Section A-A, hides in section B-B part
Light part is wide.It is described further below about details, 65 (the first light source list of narrow shading light source unit of narrow shading is formd in Fig. 6
Member), the wide shading light source unit 66 (second light source unit) of wide shading is formd in Fig. 7.
In present embodiment, the setting position by reducing light source 50 can make device become slim.For example, referring to vein number
Size according to acquisition device 2 is horizontal 30mm, vertical 30mm, high 5mm degree.In addition, by the way that light source 50 is obliquely arranged obliquely upward,
Strong light can be irradiated to the higher position of finger.In turn, it by the way that light shielding part 22 is arranged between light source 50 and finger 1, can hide
The light to advance from the light that light source 50 projects to low direction is kept off, the light to advance to high direction is only irradiated to finger 1.Thereby, it is possible to
The vein image of shooting clear.
Fig. 3 is the figure for indicating the relationship of light source and light shielding part.Fig. 4 is to indicate to carry out in the case that the setting angle of light source is big
The case where figure of irradiation, (a) is thick finger, (b) the case where being thin finger.Fig. 5 is the situation for indicating that the setting angle of light source is small
Under the figure that is irradiated, the case where (a) is thick finger, (b) the case where being thin finger.
In Fig. 3, light source 50 and light shielding part 22 are hereafter collectively referred to as light source unit 60.The setting angle [alpha] of light source 50 is light source
50 optical axis 61 (irradiation axis) and upper surface (mounting surface) angulation of finger mounting table 5.In addition, in Fig. 3, if light source 50
Angle of visibility be β, generation light shielding part 22 blocks the part of the irradiation light from light source 50.At this point, for by the part of shading,
It will be known as shading angle, θ with the upper surface of finger mounting table 5 (mounting surface) angulation.Wherein, if the region of angle of visibility β is
Predetermined region.In addition, the setting angle [alpha] of multiple light sources 50 can be equal angular, specified value α can also be set0And it is α ± α0。
In order to shoot the image being more clear, increases the shading angle, θ of the palmar side of finger, nail side is irradiated, need
Improve the irradiation position h (height apart from mounting surface) of irradiation light (with reference to Fig. 4, Fig. 5).But there is no can be to various
The finger of thickness all irradiates an adequate amount of light, and keeps the higher setting angle [alpha] of the irradiation position h of light.
For example, for thick finger, angle [alpha] will be arranged in order to irradiate light to position sufficiently high as shown in Fig. 4 (a)
It is set as α 1 (> α 2), in the case where increasing setting angle [alpha] 1, the image of shooting clear is capable of when shooting thick finger, but shoot thin
Image quality is poor when finger.This is because light irradiates (Fig. 4 (b)) to the more top of the upper end (nail-side) of thin finger, do not have to finger
Irradiate an adequate amount of light.
On the other hand, as shown in Fig. 5 (b), in order to irradiate an adequate amount of light to thin finger, setting angle [alpha] is set as α 2, is subtracted
In the case where small setting angle [alpha] 2, as shown in Fig. 5 (a), to the irradiation position h of the light of thick fingerLFIt is lower, so shooting thick finger
When vein image become unintelligible.
As described above, in the finger intravenous data acquisition device 2 from inclined direction to the shape of reference object irradiation light, hair
Image quality when image quality deteriorates, shoots thick finger if reducing setting angle [alpha] when life shoots thin finger if increasing and angle [alpha] is arranged
The problem of deterioration.
Then, it in present embodiment, is characterized in that keeping setting angle [alpha] certain, 2 kinds of different light sources of setting shading angle, θ
Unit, so as to the vein image of the finger shooting clear to all size.
Fig. 6 is the figure for indicating the example of narrow shading light source unit (first light source unit).Fig. 7 is to indicate wide shading light source list
The figure of the example of first (second light source unit).Illustrate the light source 50 in light source unit 60 with Fig. 6, Fig. 7, suitably with reference to Fig. 2, Fig. 3
With the positional relationship of light shielding part 22.Fig. 6 is the Section A-A figure of Fig. 2 (c), and Fig. 7 is the section B-B figure of Fig. 2 (d).In addition, for
Light source 50, if the light source 50 of narrow shading light source unit 65 (first light source unit) is light source 51 (first light source), if wide shading light
The light source 50 of source unit 66 (second light source unit) is light source 52.
It is big to refer to that intravenous data acquisition device 2 has the small narrow shading light source unit 65 of shading angle, θ and shading angle, θ
Wide shading light source unit 66.The light source 52 of the light source 51 of narrow shading light source unit 65 and wide shading light source unit 66 is all set with same
Set angle [alpha] setting.In addition, distance d1, d2 of the light source 50 on the basis of the central axis of opening portion 20 is also identical.
On the other hand, the size of light shielding part 22 by light source unit different, the light shielding part 22 in narrow shading light source unit 65
Width w1 be less than wide shading light source unit 66 in light shielding part 22 width w2.As a result, the screening in narrow shading light source unit 65
The distance between light portion 22 and light source 50 k1 are greater than the distance between light shielding part 22 and light source 50 in wide shading light source unit 66
K2, so the shading angle, θ 1 of narrow shading light source unit 65 is less than the shading angle, θ 2 of wide shading light source unit 66.
As shown in Figure 6, Figure 7 by changing the size of light shielding part 22, can be realized to the lower position of irradiation light is from load
Face is set to play the narrow shading light source unit 65 of lower position irradiation light and hide the width of position higher from mounting surface irradiation light
This 2 kinds of light source units of radiant unit 66.
In addition, as described above, light source 52 in light source 51 and wide shading light source unit 66 in narrow shading light source unit 65
Setting angle [alpha] be identical value.Therefore, light source 51,52 can configure in the same face, so bearing light source can be shared
Component has and reduces the components number referred in intravenous data acquisition device 2, component shape is made to become more simple shape
Advantage.
Then, illustrate the process content in authentication processing portion 10.
Figure 12 is the flow chart for indicating registration process.Illustrate the registration procedure 100 executed with CPU11 with Figure 12 to implement
Registration process process.In registration process, firstly, CPU11 implements to determine whether to placed device the finger of (mounting) finger
It places detection processing (S101).Later, CPU11 implements to irradiate the appropriate light quantity from light source 50 for the finger to reference object
Light source adjustment handle (S103).After the completion of the adjustment of light quantity, CPU11 carries out pattern extraction processing (S108), characteristic life
At processing (S109).Finally, saving characteristic in storage device 14, registration process is completed.
Then the details of the registration process of explanatory diagram 12.
Firstly, illustrating that finger places detection processing (S101).It is to determine whether to put finger that finger, which places detection processing,
Set the processing on finger mounting table 5.The method of judgement can be passed using using the contact being arranged in inside finger mounting table 5
The method of sensor, the method using image procossing, combination contact sensor and the method for image procossing etc..
An example of method described herein as using image procossing.Using the method for image procossing, because not needing finger inspection
Dedicated sensor is surveyed, so having the advantages that components number can be reduced, cutting down cost.Firstly, using finger vein pattern is made
The above-mentioned light source 50 of the illumination of shooting is flashed with some cycles.Not in the case where placing finger 1 on finger mounting table 5, nothing
It lights or extinguishes by light source 50, all there is no the objects for scattering light, so will not mirror shooting from the light that light source 50 issues
Portion 4.To bright in the case that the state that progress light source 50 is lighted is compared with the image of the shoot part 4 in the state of extinguishing
The not big variation of angle value.
On the other hand, in the case where placed finger 1 on device, the light irradiated from light source 50 is scattered and is reflected by finger 1
Enter shoot part 4.To which big variation occurs for the brightness value of the image of the state of state and extinguishing that light source 50 is lighted.Then, refer to
Intravenous data acquisition device 2 sends the image that when lighting and the when of extinguishing shoots by image input unit 18 to authentication processing portion 10,
The variable quantity of image is calculated and saves, in CPU11 so as to detect the placement of finger.
When finger places detection processing (S101) completion, the illuminating light that vein is shot is exported from light source 50.At this point, taking
The light source certainly to be lighted when the thickness for the finger placed on finger mounting table 5 and the thickness of skin etc., vein shooting and bat
It is different to take the photograph required light quantity.Then, in order to obtain clearest image and carry out the selection processing (S102) of light source, be adjusted
The processing (S103) of the light quantity of the light source of selection.
Illustrate overview firstly, for light source selection processing (S102).As described above, in the case where shooting thick finger preferably only
Light wide shading light source (light source 52 of wide shading light source unit 66).This is because by lighting wide shading light source, it being capable of opponent
Refer to 1 higher position irradiation light, the image of shooting clear from mounting surface.On the other hand, when shooting thin finger, because only using
The light of wide shading light source cannot obtain the image of abundant brightness, and it is advantageous to select narrow shading light source (narrow shading light source unit 65
Light source 51).That is, light source selection processing (S102) is the size for determining the finger 1 placed on finger mounting table 5, selection is suitable
Close the processing of the light source of the size of the finger 1 of reference object.
In present embodiment, in the differentiation of the thickness of finger 1, the image shot when lighting wide shading light source is used.This
It is because while lighting wide shading light source obtained brightness value of image changes because of the thickness of the finger of placement.Specifically, putting
Brightness is high in the case where setting thick finger, and brightness is low in the case where placing thin finger, it is determined that the brightness value of the image of shooting is
It is no more than certain value.
Figure 14 is the flow chart for indicating light source selection processing.Light source selection is handled in (S102), firstly, CPU11 is only ordered
Wide shading light source (light source 52) lights (S1021) with maximum intensity.Later, image (S1022) is shot with shoot part 4.CPU11 meter
The average brightness value (S1023) of nomogram picture.Determine average brightness value whether more than the threshold value being determined in advance (S1024).CPU11
In the case where average brightness value is threshold value or more, (S1024, yes) selects wide shading light source (light source 52) (S1025), average
(S1024, no) selects narrow shading light source (light source 51) (S1026), the processing of light source selection in the case where brightness value deficiency threshold value
Terminate.By the above process, the light source for being suitble to the finger of reference object is selected.
Figure 12 is returned, then, illustrates that light quantity adjustment handles (S103).In the shooting for referring to vein, the average bright of image is shot
In the case that angle value is the value of the immediate vicinity of brightness degree, the image of clearly vein can be obtained.
For example, blood vessel and the contrast other than it are bad, so unintelligible when the average brightness value of shooting image is too low.
Conversely, the part being saturated when average brightness value is excessively high, can not extract vascular patterns.That is, light quantity adjustment processing (S103)
In, using the median of brightness degree as target brightness value, the tune in a manner of shooting the average brightness value of image close to target value
Whole light quantity.As the quantity-of-light adjusting method, in the present embodiment, the average brightness value of the image of monitoring shooting always, root are used
Feedback control is carried out to light quantity according to the value and close to the method for target brightness value.
Figure 15 is the flow chart for indicating the light quantity adjustment processing of first embodiment.Light quantity adjustment is handled in (S103), first
First, CPU11 order light source selection handles the light source 50 (light source 51 or light source 52) selected in (S102) with preset initial
Light value (L0) lights (S1031).About initial light value (L0), mesh can be shot when measured in advance placed the finger of standard
The light value for marking the image of brightness value, is set as the value.Then, image (S1032) is shot with shoot part 4.CPU11 calculates the figure
The average brightness value (V0) (S1033) of picture.Judge whether calculated average brightness value (V0) is target brightness value (S1034).
In the case where not reaching target brightness value (S1034, no), CPU11 is calculated, is reset next light value (S1035), is ordered
Light source 50 lights (S1036).The calculating of next light value utilizes light value pass proportional to the shooting average brightness value of image
The feature of system carries out.It after resetting light value, shoots image (S1032), CPU11 implements average brightness value calculating once again
(S1033), the judgement (S1034) of average brightness value.The process repeatedly, moves closer to target brightness value.The average brightness of S1034
In the case where having reached target brightness value in the judgement of value (S1034, yes), processing terminate for light quantity adjustment.
Figure 12 is returned, then, implements the extraction processing (S108) of vascular patterns.The extraction of vascular patterns handles (S108)
From unwanted information (noise and fold etc.) in certification is removed in the image that shoot part 4 is shot, vascular patterns are only detected
Processing.As the abstracting method of vascular patterns, the side using the edge enhancement filtering and matched filtering for emphasizing line segment can be utilized
Method, by track line ingredient extract the method for line pattern, abstract image cross section profile in brightness value local dent position
The method etc. set.
Later, CPU11 implements characteristic generation processing (S109) according to the result for extracting processing.As characteristic,
It is able to use method, the detection ramification point and the method for endpoint etc. that the image of result itself for extracting processing is used as to characteristic quantity.
It, can also treated that image contracts to extracting in order to reduce size of data in the case where regarding image itself as characteristic quantity
Small processing.
Characteristic preservation processing (S110) in, characteristic generation handle (S109) in generate characteristic and
The placement position information that finger places calculated finger in detection processing (S101) is saved in storage device 14.As hand
The location information of finger can save the outline position on the right side of finger and the outline position in left side, can also save based on profile
The center for the finger that positional information calculation goes out.In addition it is also possible to implement encryption to characteristic before preservation.
Figure 13 is the flow chart for indicating authentication processing.Illustrate the authentication processing process implemented with authentication procedure 120 with Figure 13.
In authentication processing, carries out finger and place detection processing (S101), light source selection processing (S102), light quantity adjustment processing
(S103), pattern extraction processing (S108), characteristic generation processing (S109).Later, the characteristic implemented and registered in advance
According to control treatment (S112), determine the whether registered finger of the finger of certification object.
In the process flow of above-mentioned authentication processing, finger places detection processing (S101), light source selection handles (S102), light
Measure adjustment processing (S103), pattern extraction processing (S108), characteristic generation processing (S109) this 5 processing, using with step on
Note handles identical method.Illustrate control treatment (S112) below.
In control treatment (S112), for the characteristic generated in the characteristic generation processing (S109) in authentication processing
According to, with registration when generate, save characteristic be compared control.It uses image itself as in the case where characteristic, makes
Image coincides with one another, and implements the comparison of pixel value each other, calculates concordance rate.Use the case where ramification point and endpoint are as characteristic
Under, concordance rate is calculated by comparing information such as its number, the angle of disagreement line, relative distances.
For CPU11 using the concordance rate obtained herein, judgement is same finger or different fingers (whether concordance rate is high)
(S113).For the certification threshold value of judgement, can statistically calculate in advance.In the case where being the concordance rate higher than certification threshold value
(S113, yes), is determined as registrant, the processing (S114) after being authenticated.In the case where being determined as registrant, such as locked
Fixed releasing etc. is as the processing after certification.Be not than the high concordance rate of certification threshold value in the case where (S113, no), be considered as placement
Unregistered finger, refusal certification.
In the registration process of Figure 12 and the authentication processing of Figure 13, in other words, CPU11 is to not only act as feature extraction list
Member, feature comparison unit effect, also act as light source selecting unit, fader control unit, measure finger position unit work
Processing unit.
In present embodiment, with the light source 51 (first light source) and wide shading light source list in narrow shading light source unit 65
Light source 52 (second light source) in member 66 is used as multiple light sources.Is lighted in the case where having loaded finger in authentication processing portion 10
Two light sources light first light source in the case where determining finger is thin finger.
In present embodiment, the case where light source 50 is 2 kinds is illustrated, but it is different that 3 kinds of arrangement above angles also can be used
Light source 50.In addition, light shielding part 22 and finger mounting table 5 can be fabricated to the same part with same material.It is same by being fabricated to
One component has the effect of the components number for reducing device, the cost for reducing device.
Fig. 8 is the figure for indicating to refer to the other examples of intravenous data acquisition device, and (a) is that have opening portion by each light source
Situation, the case where (b) being configured with multiple light sources.In the case where Fig. 2 (a), refer to intravenous data acquisition device 2, in opening portion 20
Two sides, the multiple light sources being made of 4 light sources 50 are configured in opening portion 26.In contrast, split in the case where Fig. 8 (a)
Oral area 26a configures narrow shading light source unit 65 (referring to Fig. 6), to opening portion 26b configuration wide shading light source unit 66 (with reference to figure
7).Furthermore, it is possible to light-blocking member is configured between narrow shading light source unit 65 and wide shading light source unit 66,2 kinds of light source units
It is independent.
In the case where Fig. 8 (b), in opening portion 26 same as Fig. 2 (a), 2 kinds of light source units can be made to combine, configured by 8
The multiple light sources that a light source 50 forms.By multiple light sources shown in configuration diagram 8 (b), can adequately be sent out from light source 50
Light quantity.
<<second embodiment>>
Fig. 9 is the figure for indicating the finger intravenous data acquisition device of second embodiment, and (a) is top view, is (b) mounting
The top view of the case where finger is (c) Section A-A figure, is (d) section B-B figure.In first embodiment, change light shielding part 22
Size and change shading angle, θ, but in second embodiment, change the position of light source 50 and change shading angle, θ.Second is real
Apply mode finger intravenous data acquisition device 2 have the narrow shading light source unit 65 of shading angle, θ small (θ 1) (with reference to Fig. 9 (c)),
With the wide shading light source unit 66 (referring to Fig. 9 (d)) of shading angle, θ big (θ 2).
As shown in Fig. 9 (a), in opening portion, 26c is configured with light source 50 (light source 51,52), in opening portion 20 and opening portion 26c
Between have light shielding part 71.Fig. 9 (c) is Section A-A figure, indicates narrow shading light source unit 65.Fig. 9 (d) is section B-B, is wide
The sectional view of shading light source unit 66.The light source for including in the light source 51 of narrow shading light source unit 65 and wide shading light source unit 66
52, all with the setting of same angle [alpha].In addition, the width w1 of the light shielding part 71 of narrow shading light source unit 65 and wide shading light source unit
The width w2 of 66 light shielding part 71 is same widths.But the distance d1 of the light source 50 on the basis of the central axis of opening portion 20,
D2 is different, and distance d2 is less than distance d1.As a result, light shielding part 71 in narrow shading light source unit 65 and light source 51 (first light source) it
Between distance k1 be greater than light shielding part 71 and the distance between light source 52 (second light source) k2 in wide shading light source unit 66, so
The shading angle, θ 1 of narrow shading light source unit 65 is less than the shading angle, θ 2 of wide shading light source unit 66.As described in this embodiment
By changing distance d1, d2 of light source, the different multiple light sources unit of shading angle, θ can be realized.
In second embodiment, illustrate with reference to Figure 10 from the advantages of 50 shading of light source.Figure 10 is to indicate to refer to that intravenous data takes
The figure of the other examples of device is obtained, (a) is the insufficient situation of shading, is (b) the abundant situation of shading.As shown in figure 3, general
For the light that is projected from light source components such as LED spread and advance in certain range with angle of visibility β.
Therefore, in the case that the opening portion 26d shown in Figure 10 (a) configures light source 52, leniently shading light source unit 66 (is joined
Examine Fig. 7) light source 52 export light, with angle of visibility β irradiation.Wherein, the region shown in the symbol of Figure 10 (a) 82 is advanced
Light, because the light of specified amount can be blocked by the light shielding part 22 in wide shading light source unit 66 (referring to Fig. 7).But
The light in region shown in the symbol 81 of Figure 10 (a) can by the light shielding part 22 in narrow shading light source unit 65 (referring to Fig. 6), so
Shading is insufficient.Therefore, the lower limit irradiation position apart from mounting surface of the light of directive finger is low, when being shot using thick finger as object
Image quality deterioration.
On the other hand, in the case of shown in Figure 10 (b), the problem as shown in Figure 10 (a) will not occur.Second embodiment
In the case where, as shown in figure 9, the because (shading of Fig. 9 of light shielding part 22 of narrow shading light source unit 65 and wide shading light source unit 66
Portion 71) width be same size, so the excellent feature of problem as described above will not be occurred by having.
<<third embodiment>>
Figure 11 is the figure for indicating the finger intravenous data acquisition device of third embodiment, and (a) is top view, is (b) mounting
The top view of the case where finger, is (c) Section A-A figure, is (d) section B-B figure.In second embodiment, make light source 50
Position changes in the width direction of finger and changes shading angle, θ, and in third embodiment, make the position of light source 50 in finger
Short transverse variation and change lamp shielding angle θ.The finger intravenous data acquisition device 2 of third embodiment, it is small to have shading angle, θ
Narrow shading light source unit 65 (refer to Figure 11 (c)) and the big wide shading light source unit 66 (referring to Figure 11 (d)) of shading angle, θ.
As shown in Figure 11 (a), in opening portion, 26e is configured with light source 50, has between opening portion 20 and opening portion 26e and hides
Light portion 72.Figure 11 (c) is Section A-A figure, indicates narrow shading light source unit 65.Figure 11 (d) is section B-B, is wide shading light source
The sectional view of unit 66.The light source 50 for including in narrow shading light source unit 65 and wide shading light source unit 66, all with same angle [alpha]
Setting.In addition, distance d1, d2 (i.e. W1=W2, k1=k2) of the light source 50 on the basis of the central axis of opening portion 20 is identical.But
It is that the position of the low d6 of short transverse from the mounting surface of finger mounting table 5 in finger is arranged in light source 50 shown in Figure 11 (d)
It sets.As a result, the shading angle, θ 1 of narrow shading light source unit 65 is less than the shading angle, θ 2 of wide shading light source unit 66.Such as this implementation
By changing the distance d6 of the short transverse of light source described in mode, the different multiple light sources unit of shading angle, θ can be realized.
<<the 4th embodiment>>
In 4th embodiment, illustrate the other embodiments of light quantity adjustment processing (S103).The light of first embodiment
Adjustment processing (S103) is measured, is to carry out light quantity adjustment processing (S103) after carrying out light source selection processing (S102).With this phase
Right, the light quantity adjustment processing (S103) of the 4th embodiment does not need light source selection processing (S102).Therefore, have with first in fact
The processing time that can shorten registration process and authentication processing is compared in the light source selection processing for applying mode with light quantity adjustment processing,
Light quantity adjust finger in treatment process placement location it is mobile in the case where, the specialities such as also can persistently light with best light quantity.
In turn, in first embodiment, in light quantity adjustment processing (S103), the light of wide shading light source unit 66 is only adjusted
The light quantity of the folk prescription of the light source 51 of source 52 or narrow shading light source unit 65.In contrast, the processing of the 4th embodiment can be same
When adjust the light quantity of 2 kinds of light sources 51,52, so the light quantity that is more suitable for can be calculated to the finger of reference object.
For example, it is envisioned that applying the light quantity adjustment (S103) of first embodiment when shooting the finger of moderate thickness
In the case where, because shading is insufficient image quality is unintelligible when only putting bright light source 51, only with shading amount when light source 52 excessively without
It can obtain use-case as the image of abundant brightness.In the case where shooting such finger, compared with only lighting folk prescription, first with
Lit at maximum brightness light source 52 only compensates the light quantity of the part of luminance shortage light source 51, and thus, it is possible to reduce directive finger
The position low apart from mounting surface light, be capable of the image of shooting clear.The light quantity of 4th embodiment adjusts, and is to pass through combination
Control 2 kinds of light sources, and the method for shooting clearer image.
In addition, the processing for the magnitude of current that light source 51,52 is flowed through in light quantity adjustment processing (S103) specifically control, institute
With it is above-mentioned to the influence of the clarity of image except, it is also desirable to consider to authentication device consumption electric power influence.
Herein, the necessary condition with light quantity adjustment processing (S103) is arranged again.The processing of illuminating light source is controlled,
It is only important that meeting following 3 necessary conditions.
Necessary condition 1 is to make to consume electric power below certain value.The small-sized finger vein authentication system recorded in the present invention
80 (person authentication devices) are for the personal identification purposes towards the information terminals such as tablet terminal and smart phone.Small-sized information
Terminal consumes electric power since it is desired that reducing, so being also required to inhibit the consumption electric power of authentication device, flows in the light source of authentication device
The magnitude of current crossed is also restrained.
Necessary condition 2 is to be able to shooting and is suitable for the image of certification and adjusts light quantity.Suitable for certification image there are two
Condition.
Necessary condition 2-1: first condition is that the average brightness of image is this condition of the median of brightness degree.
Necessary condition 2-2: second condition be and narrow shading light source unit 65 (with reference to Fig. 6) used in narrow shading light source
(first light source), which is compared, makes width shading light source (second light source) used in wide shading light source unit 66 more preferentially light and clap
Take the photograph this condition.When preferentially lighting wide shading light source, light irradiates the top of finger, so the contrast of vein image improves,
Authentication precision improves.
In the two conditions, for necessary condition 2-1 compared with necessary condition 2-2, the effect that authentication precision improves is higher.Cause
This, preferentially meets necessary condition 2-1 first, only there are a variety of light quantity combinations for meeting necessary condition 2-1, with full
Sufficient necessary condition 2-2 is target.
Necessary condition 3 is can also to calculate optimal light value in the case where the change in location of finger.Such as Figure 15
Shown in process, the image of light quantity adjustment processing shooting number frame.The position for the finger that user places therebetween may change, so needing
Will in such a case, also lasting shooting is most suitable for the image of certification.
These necessary conditions are formulated, as follows.
Firstly, setting the light of wide shading light source (light source 52 (second light source)) and narrow shading light source (light source 51 (first light source))
Magnitude is respectively Ph、PlIf the maximum value of the light value determined by the rated value of the LED of light source component is Pmax, then Ph、PlIt is full
It is enough lower conditional.
0≤Pl≤ Pmax, 0≤Ph≤Pmax (1)
If width shading light source shown in necessary condition 1 and narrow shading light source by the light value that uses current limit to determine
Aggregate upper is Ps, then necessary condition 1 becomes:
Ph+Pl≤Ps (2)
The average brightness value of image is determined by light value, so being defined as I (Ph, Pl).Herein, if ItFor I (Ph, Pl)
Target value when,
Necessary condition 2-1 is equivalent to the smallest P of δ I for finding out and being defined with (3) formulah、Pl:
δ I=| I (Ph, Pl)-It| (3)
In addition, according to the preferred P of necessary condition 2-2hIt is as big as possible, so to be adjusted in the range of meeting above-mentioned condition
It is maximum.
Herein, as long as knowing I (Ph, Pl) functional form, it will be able to be easily determined by Ph、Pl, but be actually unable in
It is enough that the functional form is found out before certification starts.This is because I (Ph, Pl) functional form because finger shape and light transmission,
Place the position of finger and different.That is, the information that light quantity adjustment processing measures when can be defined as using certification, thus it is speculated that I (Ph,
Pl) functional form, find out and meet the smallest best light value P defined in formula (1), the same up-to-date style of condition (3) of formula (2)h、Pl。
Figure 16 is the flow chart for indicating the light quantity adjustment processing of the 4th embodiment.Illustrate the light that CPU11 is executed with Figure 16
Measure adjustment processing (S103).In light quantity adjustment processing, CPU11 order light source first is lighted with arbitrary initial light value (L0)
(S1031), image (S1032) is shot.Initial light value is set as the optimum value of the finger for average thickness, is able to use average
The brightness value in advance assessed high for the light value of target value and wide shading light source.Then, CPU11 calculates the image of shooting
Average brightness value (V0) (S1033).Then, CPU11 (S1034, no) in the case where average brightness value miss the mark value,
CPU11 executes the processing (S1040) that best light value calculates.When the processing is average brightness value and the shooting using past number frame
Light value, determine shooting next frame when light value processing.Then, CPU11 order light source by best light quantity to be calculated
Processing (S1040) calculated light value light (S1036), later, return to the processing of S1032.Pass through the process repeatedly, energy
Enough make the average brightness value of the image of shooting close to target brightness value ItState continue.That is, average brightness value arrives in S1034
In the case where having reached target value (S1034, yes), terminate light quantity adjustment.Hereinafter, the best light quantity in process shown in explanatory diagram 16
It is worth the processing (S1040) calculated.
Make light value Ph、PlThe average brightness value of the image shot when being all 0 is one independent of the finger of photography target
Fixed.In the present apparatus, because average brightness value when making light value 0 is 0:
I (0,0)=0
In addition, increasing the light value P of each light sourceh、P1When the brightness value of image that shoots, it is higher than before increasing light value.
To average brightness I (Ph, Pl) may be considered relative to light value Ph、PlThe function being increased monotonically respectively.Present embodiment
In, it is assumed that brightness value is proportional to each light value, it may be assumed that
I(Ph, 0) and=aPh, I (0, Pl)=bPl
Herein, a, b are each proportionality coefficients.Furthermore, it is contemplated that the light value of each light source is addition property to the contribution of brightness.
That is, can be written as:
I(Ph, Pl)=I (Ph, 0) and+I (0, Pl) (4)
According to the above, I (Ph, Pl) functional form become:
I(Ph, Pl)=aPh+bPl (5)
Herein, the light exported from narrow shading light source unit 65 shown in fig. 6, when shading angle, θ 1 is smaller, almost all pair
The finger of reference object irradiates, in contrast, the light that wide shading light source unit 66 shown in Fig. 7 exports, because of shading angle, θ
2 is big, so low to the contribution rate of the brightness value of image.Therefore, the light value of wide shading light source (light source 52 (second light source))
Increase caused by brightness value climbing, than brightness value caused by narrow shading light source (light source 51 (first light source)) climbing more
It is low.To which following relationship is set up between coefficient a, b.
a<b (6)
The calculation method of optimal brightness in present embodiment is to speculate to change in the range of meeting above-mentioned restriction formula
Ph、PlWhen brightness value I (Ph, Pl) method.Average brightness value by the light value that was irradiated according to the past and at this time is presumably
Coefficient a, the b for stating formula (5) can be found out and arbitrary light value Ph、PlCorresponding average brightness I (Ph、Pl).This method is to make
With the estimation result of coefficient a, b, I (P is found outh, Pl)=ItPh、PlCombined processing.
As the determining method of coefficient a, b, such as it is able to use least square method.Least square method is widely used as making mould
The method of the smallest optimization method of the error of type function and measurement result.Hereinafter, explanation uses the least square method coefficient of determination a, b
Method as coefficient determining method an example.If the average brightness value of past N frame is I1、I2、……、IN, light at this time
Amount are as follows:
(PH, 1, PL, 1), (PH, 2, PL, 2) ... ..., (PH, N, PL, N)
Then two multiply error s2Become:
[formula 7]
S is found out with least square method2The smallest a, b.The result found out is as follows.
[formula 8]
Herein, < > indicates average value.By using the value of a, the b found out in this way, can speculate and arbitrary light value
Ph、PlCorresponding average brightness I (Ph, Pl).Then, optimal light value P is determined with above-mentioned a, bh、Pl。
Best light value is to meet I (Ph, Pl)=ItPh、Pl, but because I (Ph、Pl) it is bivariate function, so in the presence of
It is multiple to meet I (Ph, Pl)=ItPh、PlCombination.Herein, if it is considered that P shown in necessary condition 2-2hThis maximum condition,
Then Ph、PlValue uniquely determine.That is, meeting I (Ph, Pl)=ItPh、PlCombination in, meet the item of formula (1), formula (2)
Part formula and PhMaximum Ph、PlCombination be best light value.
Calculate best light quantity in this way to meet above-mentioned necessary condition.In addition, calculating best light quantity in this method
When, it is able to carry out processing as long as the data of 2 frames before the processing (S1040) for having best light value to calculate, so even if hand
The positional shift of finger also only can calculate correct light value by the data of 2 frames after obtaining.
According to the present embodiment, high-precision and small-sized person authentication device be can be realized.Person authentication device can be right
The image suitable for certification is all shot to optimum position irradiation light in the organism of all size.In addition, person authentication device energy
The size of enough organisms independent of reference object and the vein image of placement location and shooting clear.Thus, it is possible to carry out height
The certification of precision.
In the person authentication device of present embodiment, shooting vein image is illustrated, but not limited thereto.For example, can also
To shoot the blood-vessel image for including artery.In addition, light shielding part 22 can also use the inner wall structure of the inner wall of finger mounting table 5, shell
At.
Symbol description
1 finger
2 refer to intravenous data acquisition device
4 shoot parts
5 finger mounting tables (shell, finger mounting table)
6 audio output units
10 authentication processing portions
11 CPU (central processing department)
12 memories
13 interfaces (IF)
14 storage devices
15 power supply units
17 display units
18 image input units
19 information input units
20,26 opening portion
22,71,72 light shielding part (lightproof unit)
30 registration datas
40 authentication datas
50 light sources
51 light sources (first light source, narrow shading light source)
52 light sources (second light source, wide shading light source)
60 light source units
61 optical axises (irradiation axis)
65 narrow shading light source units (first light source unit)
66 wide shading light source units (second light source unit)
80 finger vein authentication systems (person authentication device)
100 registration procedures
120 authentication procedures.
Claims (9)
1. a kind of person authentication device characterized by comprising
Shell has opening portion in the mounting surface of mounting finger；
Multiple light sources, in the longitudinal direction arrangement of finger and from finger described in oblique direction in the shell；
Shoot part, in the shell via the opening portion to from the finger transmission after the light from the light source into
Row shooting；With
Processing unit, the feature extracted to the vein image of the finger obtained from the shoot part and pre-stored biology
Body information is compareed,
There is the light shielding part that shading is carried out to the light from the multiple light source in plane identical with the mounting surface, it is each described
Light source is different at a distance from the light shielding part,
Wherein, the light source constitutes light source unit with to the light shielding part of the light source shading,
The light source unit includes:
The light source longer first light source unit at a distance from the light shielding part；With
Light source second light source unit shorter at a distance from the light shielding part,
The width of light shielding part in the first light source unit is of same size with the light shielding part in the second light source unit.
2. person authentication device as described in claim 1, it is characterised in that:
The optical axis of the multiple light source is at the same angle relative to the mounting surface.
3. person authentication device as described in claim 1, it is characterised in that:
The light shielding part the finger the shading of width direction to from the opening portion identical distance,
It is different that the position of the multiple light source is configured to the distance on the width direction of the finger.
4. person authentication device as described in claim 1, it is characterised in that:
The light shielding part the finger the shading of width direction to from the opening portion identical distance,
The position of the multiple light source be configured to the distance on the width direction of the finger it is identical and with the mounting surface distance
It is different.
5. person authentication device as described in claim 1, it is characterised in that:
The multiple light source includes:
The light source longer first light source at a distance from the light shielding part；With
Light source second light source shorter at a distance from the light shielding part,
The processing unit lights the second light source in the case where having loaded the finger, is determining that the finger is thin hand
The first light source is lighted in the case where finger.
6. person authentication device as claimed in claim 5, it is characterised in that:
The person authentication device has the fader control unit for the light quantity for controlling the light source,
The fader control unit, calculates the average brightness value of the described image of shooting,
In the case where the average brightness value not up to defined target value, the first light source and second light are lighted
Source, and calculate the average brightness value and meet the defined first light source of target value and the light value of the second light source.
7. a kind of finger vein authentication apparatus characterized by comprising
Load the finger mounting table of the finger of certification object；
First light source and second light source, to the finger irradiation light of the certification object；
Shoot part, light of the shooting from the first light source and the second light source are formed by the finger of the certification object
The image of vein；With
Lightproof unit, the light of the finger described in directive partly hides in the plane that the finger mounting table loads the finger
Light,
The first light source and the second light source,
By irradiation axis upward in a manner of the inside that configured in the finger mounting table,
It is irradiated in such a way that the light emission from the light source is to the predetermined region for placing the finger, and comes from the light
The light in source by the lightproof unit partly shading,
The lightproof area of the first light source is different from the lightproof area of the second light source,
The first light source constitutes first light source unit with to the light shielding part of the first light source shading,
The second light source constitutes second light source unit with to the light shielding part of the second light source shading,
First light source described in the first light source unit is at a distance from the light shielding part than described in the second light source unit
The distance of second light source and the light shielding part,
The width of light shielding part in the first light source unit is of same size with the light shielding part in the second light source unit.
8. finger vein authentication apparatus as claimed in claim 7, it is characterised in that:
Including processing unit, the image that is taken according to the shoot part compare with pre-stored Biont information.
9. finger vein authentication apparatus as claimed in claim 7, it is characterised in that:
The shoot part is formed in the finger mounting table, is shot via the opening portion for penetrating light.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014053636A JP6355371B2 (en) | 2014-03-17 | 2014-03-17 | Personal authentication device and finger vein authentication device |
| JP2014-053636 | 2014-03-17 |
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|---|---|---|---|---|
| SG11202000573VA (en) * | 2017-08-01 | 2020-02-27 | Nanjing Easthouse Information Technology Co Ltd | Finger vein image acquisition device |
| CN109447961A (en) * | 2018-10-19 | 2019-03-08 | 闻泰通讯股份有限公司 | Interior sight detection method and its device |
| DE112019005940T5 (en) | 2018-12-28 | 2021-08-12 | Japan Display Inc. | DETECTION DEVICE |
| CN109480815B (en) * | 2018-12-29 | 2021-10-29 | 出门问问信息科技有限公司 | Heart rate measuring method and device |
| CN111222483A (en) * | 2020-01-14 | 2020-06-02 | 重庆工商大学 | Three-dimensional finger vein recognition system |
| CN114795162A (en) * | 2022-04-18 | 2022-07-29 | 北京京东方光电科技有限公司 | Finger vein sensor and electronic equipment |
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| JP2009165731A (en) * | 2008-01-18 | 2009-07-30 | Hitachi Maxell Ltd | Biological information acquiring device |
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| JP2012212435A (en) * | 2012-05-11 | 2012-11-01 | Hitachi Ltd | Finger vein authentication device and information processor |
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| CN1620113A (en) * | 2003-11-18 | 2005-05-25 | 佳能株式会社 | Image pick-up apparatus, fingerprint certification apparatus and image pick-up method |
| CN101536908A (en) * | 2005-06-13 | 2009-09-23 | 株式会社日立制作所 | Image processing device, image processing method thereof and personal authentication method |
| CN101042732A (en) * | 2006-03-22 | 2007-09-26 | 日立欧姆龙金融系统有限公司 | Biometrics equipment and automated teller machine |
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