CN101329729A - Finger vein authentication apparatus and information processing apparatus - Google Patents
Finger vein authentication apparatus and information processing apparatus Download PDFInfo
- Publication number
- CN101329729A CN101329729A CNA2008100885423A CN200810088542A CN101329729A CN 101329729 A CN101329729 A CN 101329729A CN A2008100885423 A CNA2008100885423 A CN A2008100885423A CN 200810088542 A CN200810088542 A CN 200810088542A CN 101329729 A CN101329729 A CN 101329729A
- Authority
- CN
- China
- Prior art keywords
- finger
- light
- image
- authentication apparatus
- framework
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Image Input (AREA)
Abstract
The present invention provides a finger vein authentication apparatus and an information processing apparatus, the finger vein authentication apparatus comprises: a light source for emitting light toward a finger, an image sensor for taking an image of the transmitted light from the finger, a lens apparatus for imaging the transmitted light to the image sensor, and an image processor for processing the taken image. The lens apparatus (33) includes a short-focus wide field angle lens unit (38), and the image processor extracts a vein pattern of the finger upon correcting the strain of the taken image.
Description
Technical field
The present invention relates to the signal conditioning package of finger vein authentication apparatus and this finger vein authentication apparatus of use, especially for the technology that makes the finger vein authentication apparatus miniaturization.
Background technology
In various safety (セ キ ユ リ テ イ) technology, knownly can realize referring to the high-precision authentication technology of vein.So refer to vena identification because use the finger vein pattern of body interior can realize excellent authentication precision, and compare the more difficult forgery of finger print identifying, distort, thereby can reach the security of height.
As the existing example of this finger vena identification, for example known organism authentication apparatus of in TOHKEMY 2006-155575 communique, putting down in writing.This organism authentication apparatus comprises: irradiation is by the light source of the light of finger; To the image pickup part of taking through the light behind the above-mentioned finger; Detect above-mentioned finger whether at the finger detecting unit of assigned position; From the image of taking by above-mentioned image pickup part, extract the finger region extraction unit in the shared zone of above-mentioned finger; Make the change in gain unit of magnification change of the imaging apparatus of above-mentioned image pickup part with image quality according to the privileged site of the intra-zone of above-mentioned extraction.
The finger vena identification is compared with the vena metacarpea authentication has the advantage that can make the authenticate device miniaturization.But, in recent years,, require to make the further miniaturization of finger vein authentication apparatus, and can be applied to the small information device owing to utilize the popularizing of e-commerce transaction, Web bank of the small information device of portable phone etc.
The organism authentication apparatus of putting down in writing in TOHKEMY 2006-155575 communique is, in the shooting that utilizes the finger vein pattern that sees through light, even external environment condition difference, can not be subjected to its influence yet, always can access the shooting mode of the quality of best vein pattern, but not put down in writing the content that makes the authenticate device miniaturization.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of finger vein authentication apparatus of the midget plant that can be applied to portable phone etc. and have its signal conditioning package.
In order to reach above-mentioned purpose, finger vein authentication apparatus of the present invention is characterised in that to have: the framework of mounting finger; Penetrate the light source of light in the finger of above-mentioned framework to mounting; The imaging apparatus of the inside of above-mentioned finger being taken by above-mentioned light; Having will be from the lens devices of above-mentioned light lens unit of imaging on above-mentioned imaging apparatus of above-mentioned finger; Image processing apparatus with the image correction portion of the distortion of pattern extracting part with the vein pattern that from the image of taking by above-mentioned imaging apparatus, extracts above-mentioned finger and correction image.
Further, signal conditioning package of the present invention is characterised in that, comprising: above-mentioned finger vein authentication apparatus; With the person authentication device that carries out the personal authentication based on above-mentioned vein pattern from this finger vein authentication apparatus output, and, carry out electronic transaction based on the authentication result of this person authentication device and handle.
The finger vein authentication apparatus of the midget plant that can be applied to portable phone etc. can be provided according to the present invention and have its signal conditioning package.
Description of drawings
Fig. 1 is the stereographic map of an example of expression finger vein authentication apparatus.
Fig. 2 is the stereographic map that the expression finger vein authentication apparatus is uploaded the state that is equipped with finger.
Fig. 3 is the example of front view (FV) of the small pieces of finger vein authentication apparatus.
Fig. 4 is the inner structure and its skeleton diagram with an example of the position relation of finger of expression finger vein authentication apparatus.
Fig. 5 is the stereographic map of an example that expression is equipped with the portable phone of finger vein authentication apparatus.
Fig. 6 represents the example of the image (having distortion) that obtained by imaging apparatus.
Fig. 7 represents the image that is obtained by imaging apparatus is implemented distortion correction correction image example afterwards.
Fig. 8 is the performance plot of an example of the relation of expression object height and distortion (%).
Fig. 9 is the performance plot of an example of relation of the remolding sensitivity of expression object height and lens unit.
Figure 10 is the block diagram about the structure example of image processing function of expression finger vein authentication apparatus.
Figure 11 is planimetric map, right hand view and the front view (FV) of an example that expression is equipped with the portable phone of finger vein authentication apparatus.
Figure 12 is the stereographic map that the expression user is hold by one hand the state example of portable phone.
Figure 13 is the stereographic map that the expression user is hold by one hand the state example of portable phone.
Figure 14 is the figure of an example in the A-A cross section of expression finger vein authentication apparatus shown in Figure 1.
Figure 15 is the figure of an example in the B-B cross section of expression finger vein authentication apparatus shown in Figure 1.
Figure 16 is the figure that explanation refers to the optical model of vena identification.
Figure 17 is the sectional view of an example of the inner structure of the finger vein authentication apparatus of expression with photoconduction (light guide).
Figure 18 is the stereographic map of an example of expression finger vein authentication apparatus.
Figure 19 is the sectional view of state of the finger vein authentication apparatus of Fig. 2 of seeing from the finger tip side.
Figure 20 is the planimetric map that is used to the framework of the multiple mode when finger vein authentication apparatus configuration light source that illustrates.
Figure 21 (1) is the planimetric map of framework with another embodiment of shading wall, and (2) are the sectional views of this framework of seeing from the finger tip side.
Figure 22 (1) is the planimetric map of framework with another embodiment of shading wall, and (2) are the sectional views of this framework of seeing from the finger tip side.
Figure 23 (1) is the planimetric map of framework with another embodiment of shading wall, and (2) are the sectional views of this framework of seeing from the finger tip side.
Figure 24 (1) is the sectional view of state of the framework of the finger vein authentication apparatus that is provided with the dim light light filter seen from finger tip portion, and (2) are its planimetric maps, and (3) are the planimetric maps of dim light light filter.
Figure 25 is the expression conjugate distance from the performance plot of the relation of the object height of the lens unit that arrives 8mm for 5mm and peripheral remolding sensitivity.
Figure 26 is the expression conjugate distance from the performance plot of the relation of the object height of the lens unit that arrives 8mm for 5mm and optical distortion.
It is the following short focus lens unit of the above 0.20mm of 0.15mm that Figure 27 is to use focal length, wherein, optical distortion is-2%～+ 50%, paraxial multiplying power is more than 0.04 below 0.06, the remolding sensitivity at thing side maximum field of view angle is more than 40%, conjugate distance is from being below the 8mm, with the same condition of Fig. 6 under the image that obtains by imaging apparatus.
Figure 28 has the sectional view for the Width of the finger vein authentication apparatus of the photoconduction of different modes with Figure 17.
Figure 29 is the stereographic map of photoconduction integral body of an example of expression photoconduction.
Figure 30 (1) is the stereographic map of photoconduction integral body of another example of expression photoconduction, the overview of the shape in the groove of (2) expression photoconduction.
Figure 31 is the stereographic map of photoconduction integral body of the another example of expression photoconduction.
Figure 32 expression is present in the sectional view of overview that photoconduction about finger vein authentication apparatus forms the state of asymmetrical shape.
Figure 33 be the expression from the finger tip side towards palmar side, the outboard profile of the framework of the overview of the state that the height of the relative framework of photoconduction uprises gradually.
Embodiment
The finger vein authentication apparatus that is fit to be equipped on midget plants such as portable phone is described.In this finger vein authentication apparatus, light is from LED (the LightEmitting Diode: in light emitting diode) etc. light source irradiation extremely refers to of the below (referring to veutro) that is arranged on finger, based in the light of finger interior diffusion, see through vein or from vein reflection etc., be subjected to comprising finger vein pattern (vein pattern) finger internal environment influence and penetrate to the outside light of finger (being " seeing through light ") to call this light in the following text, photographic images extracts vein pattern and carries out authenticate himself from this image.
The image pickup part of finger vein authentication apparatus is taken for the clear picture ground to finger vein pattern, preferred satisfied following optical condition.One of them is that image pickup part is not taken the infrared light by the surface reflection of the skin of finger.If do not satisfy this condition, then the image of finger vein pattern can comprise the unwanted information such as gauffer on finger skin surface, becomes unintelligible.
Another is, image pickup part is not taken not arrive and had the degree of depth that refers to vein and the infrared light of scattering.If do not satisfy this condition, do not comprise that then the infrared light of the information of finger vein pattern can make the contrast of finger vein pattern descend.
Fig. 1 is the stereographic map of an example of expression finger vein authentication apparatus, has the framework 10 that integral body forms cube shaped.The planar side of this framework 10 has the finger guide portion 11 that is used for the mounting finger as shown in Figure 2.This refers to that guide portion 11 is made of wall 16, little teat 18 and small pieces 22.
In addition, in order to ensure focal length (focal length), be provided with in the planar side of framework 10 and be used to make the finger of authentication object and the slot part 12 that optical system described later is separated.And, as described later, by in optical system, using the lens unit of short Jiao, Wide-angle, can reduce the degree of depth of slot part 12 in this example, the result can make size miniaturization on thickness direction of finger vein authentication apparatus.
The width of slot part 12 is narrower than finger width, and the user places finger in the mode of whole covering slot parts 12 as shown in Figure 2.Thus, can prevent to shine directly into the ventral surface of the finger on the slot part 12 from the light, the exterior light that are arranged at illumination loophole 14 ejaculations that refer to the side.Because not the surface that refers to abdomen etc. reflect and enter slot part 12 below the light of optical system, so vein image that can shooting clear.
The mode that penetrates in the side of the user's who refers to guide portion 11 finger to mounting with the light that will produce from the light source of the LED of the inside that is configured in framework 10 etc. will irradiation mouthfuls 14 be arranged at the outside that refers to guide portion 11.In this example, shining the circle that is shaped as of mouth 14, but be not limited thereto, also can be polygons such as ellipse, quadrilateral.
On the bottom surface 24 of slot part 12, in order to obtain through light from finger, what be provided with rectangle (rectangle) for example sees through light entrance 20.Be equipped with IR optical filter (Off イ Le ) at this through on the light entrance 20.The light of IR optical filter blocking-up sunshine, fluorescent light etc. are to authenticating useless exterior light.In addition, prevent that dust, water droplet etc. from entering authenticate device inside.By being configured in lens devices, the imaging apparatus under the bottom surface 24, take based on the image that sees through light from entering through light entrance 20.
And then this wall 16 is made by the opaque material of relative infrared light.Thus, have, guide to the function of the side rather than the finger bottom of finger ejaculation light from the exit wound of bullet 14 of a plurality of light of the outer edge side of the planar portions that is arranged in framework.
When wall 16 makes light inject in the finger from pointing the side, wish the vein pattern of shooting relatively, the light quantity that arrives the deep of finger increases, thereupon, the above-mentioned reflected light composition from the surface that refers to abdomen etc. of image quality reduction that makes like that reduces, and therefore can photograph to finger vein pattern to see through light clearly.Further, because wall 16 can make rayed in the side than the finger that refers to the position that abdomen is high, so the vein image that finger vein authentication apparatus can shooting clear.
As shown in figure 16, when light be not enter from the side of finger but from the bottom surface of finger refer in the time, the epidermis of being pointed, refer to the influence of the scatterer 84 of inner tissue etc., light is scattered shown in arrow 82, and the light that does not have to arrive the vein pattern 80 that should be taken reflexes to imaging apparatus 30 sides.Thus, the light that does not have the information of vein concentrates on imaging apparatus, has the shortcoming of the contrast decline of the image corresponding with vein.
Relative therewith, finger vein authentication apparatus is by making the side incident of light from finger, can avoid the above-mentioned reflected light composition that contrast is descended to arrive lens devices 33, the ratio that light 86 arrives lens devices 33 that sees through that makes the deep that arrives finger, the vein that sees through finger or had the information of vein pattern by vein reflection etc. increases.
In addition, in the approximate centre of the length direction of wall 16, exist to be short rectangular-shaped to the side-prominent little teat 18 of finger.This little teat has the effect in first joint of indication finger, the user is positioned in finger on the framework with the mode that a pair of little teat 18 contacts with first joint of finger, thus the vein pattern of first juxtra-articular that lens unit described later and imaging apparatus can obtain to point.Because it is recessed that the joint component of finger is compared with the position before and after it, so little teat 18 can easily embed this depressed part.
In referring to vena identification, the vein pattern of first juxtra-articular of finger is useful for high-precision biosome identification.Therefore, see through light entrance 20 and be the rectangle of the area of image with first juxtra-articular that obtains finger, for example, preferred long limit is 10mm～20mm, minor face is the rectangle of 5mm～10mm, further, for the miniaturization of finger vein authentication apparatus, preferably long limit is that 5mm～12mm, minor face are the rectangle of 3mm～7mm.When seeing through light entrance 20 and be this size, be 6～14mm * 10～24mm as the size in the zone that can take of the finger of the body that is taken.
The vein pattern of first juxtra-articular of finger is useful for high-precision biosome identification to be to observe vein because the skin of juxtra-articular is thin, can easily see through it.
About the second joint periphery of finger, also, identical reason observes vein because seeing through it easily.Therefore, also little teat 18 can be migrated and carry out the location of second joint and authenticate for being used to.But, under the situation that second joint positions, become the state that finger significantly stretches out to the finger tip side from authenticate device, when authenticate device was set, the finger tip side needed bigger open space.In order to constitute authenticate device compactly, or in cramped construction, use it, preferably first joint is taken.
And, replace little teat 18, also can use expression to place other indicating means such as the sign of the position in finger first joint, mark.
Figure 19 (1) be expression when the finger tip side is seen the framework 10 of Fig. 2, the sectional view that position be set of light source 3 in framework 10.Imbedded infrared light supply 3 in the inside of illumination loophole 14, light source 3 for example can use LED.Can use the bullet cut LED of Figure 19 (1) expression, also can use upper surface is plane LED.
The position that is provided with of light source 3 below is described.Light source 3 is arranged on the veutro of finger.In existing finger vein authentication apparatus, because light source is arranged on the upside or the side of finger, so framework is prolonged with the supporting light source to the upside or the side of finger, therefore, the thickness of device increases.When light source is arranged on the veutro of finger, can avoid framework to prolong, thereby can make the framework attenuation to upside, the side of finger.And then, as described later for the influence of the gauffer that reduces finger surface, light source 3 is arranged on the veutro of finger.
The gauffer that has a lot of fingerprints, joint at finger surface.In order to improve the precision of authentication, must suppress gauffer influence, vein is photographed clearly.In order to suppress the influence of gauffer, consider gauffer towards, thereby light source is configured in the framework.
For example, gauffer towards be length direction with finger vertical towards situation under, light source is arranged on the side of finger.Thus, from the path of the light of light source irradiation and gauffer towards parallel.Thereby,, image is photographed so imaging apparatus can suppress the influence ground of gauffer because light does not promptly arrive imaging apparatus with the collision of the wall of gauffer.
Because the gauffer of the first joint periphery of finger mostly be vertical with the length direction of pointing towards, so light source is arranged at the side of finger.
Refer to vein in order to authenticate, the brightness value of each pixel in the image processing apparatus check image judges that the low pixel of pixel around the brightness ratio is a vein, extracts vein pattern from image.In order to extract vein pattern accurately, it is very important taking the mottled less image of brightness for the mode irradiates light of uniform light quantity, imaging apparatus on the whole with finger.If there is deviation in the irradiation of light, only a part of zone is taken secretlyer, then when carrying out Flame Image Process, this zone can be thought by mistake be blood vessel and extracting out.
What Figure 20 represented vein authentication apparatus is used to obtain the light source 3 of the mottled less image of brightness and the example of the configuration of illumination loophole 14 relative frameworks.Figure 20 (1)～(6) are the synoptic diagram on the plane of expression framework 10.
As long as can be with enough lightness irradiation fingers, then light source 3 disposes a pair of getting final product at least about framework, but, preferably shown in Figure 20 (1), Figure 20 (2), become a plurality of right modes with the relative framework of length direction and dispose light source along finger in order to improve the image quality of vein image.
In this case, preferably make the interval equalization of light source in the left and right sides of framework, and from the finger tip side to referring to that the root side can shine with uniform lightness.
Further, preferably can control the light quantity of a plurality of light sources about being positioned at independently.And then, only can not and referring under the situation of the light that the irradiation of root side is enough at finger tip, shown in Figure 20 (3), at finger tip with refer to that the root side also can be provided with light source 3 to supply the light quantity that shines finger by the light source of the side of finger.
Under the situation of a plurality of light sources 3 of configuration, also can not that whole light source 3 fully equally spaced is set, shown in Figure 20 (4)～(6), avoid near the central authorities of framework and light source is configured in finger tip and refers to the root side.Because the skin in first joint of finger is thinner, so also can photograph to vein with the light quantity of lacking than other positions, therefore, the position beyond in first joint applies high light, apply more weak light at first joint, can make light quantity is uniformly in the integral image of finger.
With light source be configured on the framework best mode according to the photography employed optics characteristic change.In order to make the framework miniaturization of finger vein authentication apparatus, it is effective using short burnt lens unit.But short focus lens exists the closer to the shortcoming of the easy more step-down of peripheral sensitivity of image.Therefore, when using the photography of such lens adversary fingering row, more for from the center of image away from the zone, promptly the finger tip side, refer to that the sensitivity in zone of the image of root side reduces more.
Therefore, shown in Figure 20 (4), Figure 20 (5), light source 3 is configured near the position of the front end of framework with near the position of rear end.Thus, when on framework, showing finger, by the side and the side-irradiation stronger light that refers to root side of light source in the finger tip side.Thereby the brightness of the integral image that is taken is even.
Shown in Figure 20 (4) and (5), when light source is configured on the framework in the mode that is positioned at finger tip, refers to the root side, from the light of light source irradiation to finger tip with refer to that the veutro of root spreads.
As mentioned above, only useful in order to make the relative photographs of the scattered light that causes by scatterer 84 not obvious from the side-irradiation of finger, and must suppress light spreading to finger tip and the veutro that refers to root.
Wall illustrated in fig. 1 is arranged on the framework shown in Figure 20 (4) the コ font, or shown in Figure 20 (5), wall 16 fully is arranged on the framework along long mode with the length direction along finger, light mainly can be radiated at finger tip thus, refer to the side of root.
Shown in Figure 19 (1), at the left and right sides of finger, framework 10 generally perpendicularly is provided with light source 3 relatively.Because finger is circular when the finger tip side is seen, so when on the framework that light source 3 is arranged on the finger both sides, from framework upward during irradiates light, light is stopped by wall 16, arrives the higher position of pointing.Thus, can improve the contrast of vein image.
In Figure 19 (1), light source 3 is positioned at the position than the profile more lateral of finger, but light source 3 also can be arranged on the position (near slot part 12 sides) than the inboard of the more close framework of pointing of profile.The width of framework is diminished.
As mentioned above, more preferably light source 3 with from slot part 12 away from mode be arranged on the framework, thereby suppress to spread light to the bottom surface of finger, according to present inventor's research as can be known, (the C of Figure 19 (1) of the distance between the edge of slot part 12 and the light source 3
1) be at least 2mm and get final product.
The upper end of light source 3 also can be slightly to the inclination of the inboard of framework shown in Figure 19 (2).Thus, even finger is thinner, light source also can shine the light quantity that is enough to measure to finger.In addition, also the different a plurality of light sources 3 in angle of inclination can be set respectively on framework, switch the light source 3 that to be lighted according to the thickness of finger.And then, also can be designed as the angle that can control light source.
Get back to Fig. 1 and proceed explanation, in the finger tip side of framework 10 end and arm side end roughly roughly, small pieces 22 are outstanding to the framework center from a pair of wall portion 16 respectively.Fig. 3 is an example of the front view (FV) of the small pieces 22 when the length direction of the finger vein authentication apparatus of Fig. 1 is observed framework 10.In the example of Fig. 3, small pieces 22 have along with the conical surface 22a to the central side advance height step-down of framework 10.
When finger was positioned in the planar side of framework 10, finger was directed to the bottom surface of framework direction along this conical surface 22A, and finger more closely contacts with framework.Thereby, can prevent that exterior light from entering image unit from the gap of finger and framework 10.
Fig. 4 is the inner structure and its skeleton diagram with an example of the position relation of finger of expression finger vein authentication apparatus shown in Figure 1.
The effective diameter of first lens 34 and second lens 36 (D of Fig. 4) is about below the 2mm, be preferably the minimum footpath lens of 1mm～1.5mm, first lens 34 form concavity in imaging apparatus 30 sides, the concavees lens that have negative magnification (パ ワ one) for integral body, second lens form convex in finger side and imaging apparatus 30 sides, have the convex lens of positive magnification for integral body.
The light entrance 20 that sees through that is formed on the bottom surface 24 of slot part 12 is closed by IR optical filter 40.Symbol 28 expression is bearing in the substrate on the bottom surface sections 26 of framework 10.On substrate 28, be fixed with the imaging apparatus 30 that constitutes by CCD or CMOS, and be provided with the peripheral circuit of imaging apparatus 30.
As a result, can reduce distance between finger bottom 46 and the imaging apparatus 30 (conjugate distance from) L1, according to the application's inventor's research, can be in the scope that is limited in 5.0mm～12.0mm with conjugate distance.Thereby can reduce the thickness of framework 10.Thus, even the situation of carrying finger vein authentication apparatus 50 on a side's of the portable phone of folded form for example shown in Figure 5 framework 52 also can suppress the maximization of portable phone.
In order to make conjugate distance from further minimizing, must use the high lens of refractive index, on the other hand, it is big that thing side-looking rink corner becomes, and is difficult in the essential scope of authentication the image of vein is taken into imaging apparatus 30.Therefore, make conjugate distance from for more than the 5.0mm.And, in material, shape field angle is become under the big situation by the improvement lens, conjugate distance from lower limit be not limited to 5mm.
In recent years, use organism authentication apparatus in the portable electronic apparatus for electronic cards such as the portable phone of doing one's utmost to make the thickness attenuation in hope, electronic notebook, Intelligent key etc., preferred conjugate distance is from being below the 8.0mm.
And in the example of Fig. 5, finger vein authentication apparatus 50 is equipped on key operation portion 53, also can be configured in the opposing party's framework one side.
In Fig. 4, symbol 48 expressions rationally focus on (ジ ヤ ス ト ピ Application ト) position, reasonable focal position in symbol L2 is meant and the reasonable focusing length between the imaging apparatus 30.In the mode of reasonable focal position 48 in referring to, make lens devices 33 relative imaging apparatus 30 advance and retreat, adjust the interval of lens unit 38 and imaging apparatus 30.
Even, also reasonable focal position can be set in the finger, so imaging apparatus 30 can be produced the image of the vein pattern of correspondence in referring to because reduce to point distance (conjugate distance from) L1 of 30 of bottom 46 and imaging apparatuss.
As mentioned above, be illustrated as the optical characteristics of lens unit with short Jiao, Wide-angle, preferably its focal length is below the above 0.5mm of 0.15mm, and below the further preferred above 0.20mm of 0.15mm, its thing side maximum field of view angle is more than 100 °.The manufacturing of lens unit becomes difficult during focal length deficiency 0.15mm, and focal length can not make the distance L 1 of Fig. 4 be enough little value when surpassing 0.5mm.
Further, when thing side maximum field of view angle is more than 100 ° the time, can obtain the vein pattern of front and back 10mm scope in first joint of finger.Carry out vena identification well for precision, preferably obtain the vein pattern of this scope.
Further, the paraxial multiplying power of lens unit is more than 0.04 below 0.1, is preferably more than 0.04 below 0.06.Resolution variation when paraxial multiplying power less than 0.04 can not guarantee that when paraxial multiplying power surpasses 0.1 the necessary photography of authentication of vein pattern is regional.
When using the lens unit of short Jiao, Wide-angle, can make authenticate device miniaturization on its short transverse as mentioned above, on the other hand, the image that is obtained by imaging apparatus 30 produces distortion, can not correctly extract vein pattern from image.
Therefore, vein authentication apparatus has image processing function, the mode of the distortion of correction image.The present inventor by changing lens unit various characteristics and carry out concrete research, if the optical distortion of having confirmed image is in-60%～+ 50% scope then distortion that can correction image.
According to present inventor's research,, the optical distortion of lens unit can be suppressed at-2%～+ 50% scope, thereby can carry out the correction of the distortion of image more accurately when the focal length of lens unit is the above 0.20mm of 0.15mm when following.
And, in the example of Fig. 4, constitute lens unit 39, but be not limited to this by two lens, so long as have the lens peculiarity of requirement, also can constitute lens unit by lens or the lens more than three.
Fig. 6 is the image before the correction that is obtained by imaging apparatus 30, and Fig. 7 is the example of the revised image of distortion.The image of Fig. 6 is the planar side that the benchmark printed article of the image that will be printed be made of 1mm gridiron pattern at interval is positioned in the framework 10 of Fig. 1, the image that is obtained by imaging apparatus 30.When revising distortion, as shown in Figure 6, for example will be along with near periphery and shape produces the image correction of distortion or correct the image that constitutes for as shown in Figure 7 the gridiron pattern by approximate equality.The control method of distortion correction is narrated in the back.
Fig. 8 is the figure of expression distorted characteristic.Object height means the relative position of the central point (optical axis: Fig. 4 41) of image to the end of image as shown in Figure 8, for example, object height is the position of the end of " 1.0 " presentation video, and object height begins 60% position (beginning 40% from the end) from central point for " 0.6 " expression.
In Fig. 8,800 is characteristics of first lens unit, and 802 is characteristics of second lens unit.Distortion (askew body) characteristic is the central side distortion of negative indication pixel to image, distorted characteristic be positive remarked pixel from image mind-set away from directional distortion.
Distortion (askew body) is the original position (with the distance " T " at center) of relative pixel and the locations of pixels (with the distance " S " at center) after the distortion (%), the value suitable with " T/S ".Distinguish according to present inventor's effort research, when optical distortion to minus side greater than-60% the time, the resolution of periphery worsens rapidly, can not repair image fully even carry out the distortion correction of image as described later.
Known in addition, when optical distortion surpasses+50%, must handle the image of broad range, on the processing time, have problems.Therefore, as long as distortion is limited between first characteristic (800) and second characteristic (802), that is, need only in-60%～+ 50% the scope that optical distortion is limited in, just can be by image processing part correction distortion.
As the characteristic of lens unit, the remolding sensitivity at further preferred thing side maximum field of view angle is 10% or more below 65%, and further preferably this sensitivity is more than 40% below 65%.In the lens unit of short Jiao, Wide-angle, as shown in Figure 9, along with the periphery near image, sensitivity descends.
In Fig. 9,900 is remolding sensitivity characteristics of first lens unit, and 902 is remolding sensitivity characteristics of second lens unit.For example, remolding sensitivity is that " 0.4 " represents that brightness is 4/10ths when the brightness of picture centre is " 1.0 ".By as shown in Figure 1 the outlet of light being configured in the neighboring area of framework 10, and from the side-irradiation light of finger, can revise the decline of the sensitivity of short burnt, Wide-angle lens unit.Remolding sensitivity also can be expressed as brightness ratio.
When above-mentioned remolding sensitivity less than 10%, the brightness of the periphery of image descends, and can not be obtained the correct image of vein pattern by imaging apparatus.On the other hand, when above-mentioned remolding sensitivity surpasses 65%,, can not obtain the correct image of vein pattern equally by imaging apparatus because the brightness of the periphery of image uprises.Effort research according to the present inventor is confirmed, if the remolding sensitivity of thing side maximum field of view angle (object height is " 1.0 ") is between the characteristic (902) of the characteristic (900) of first lens unit and second lens unit, be remolding sensitivity in the scope below 40% more than 10%, decline that then can compensate for sensitivity.
Research according to the present inventor, when with the focal length be below the above 0.2mm of 0.15mm, thing side maximum field of view angle is that 100 °, paraxial multiplying power are more than 0.04 below 0.06, the size of the authentication region of finger is 10mm and is the combination that the mode of 15mm～18mm changes a plurality of lens at the length direction of finger at Width, constitute lens unit, and when verifying its remolding sensitivity, as shown in figure 25, can to make the remolding sensitivity at thing side maximum field of view angle be more than 40% below 65% in affirmation.Further, as shown in figure 26, the relation of probatio inspectionem pecuoarem object height and optical distortion, affirmation can be suppressed at optical distortion in-2%～+ 50% the scope.
As mentioned above, in order to make conjugate distance from for below the above 8.0mm of 5.0mm, use focal length to be the short focus lens unit below the above 0.20mm of 0.15mm, on the other hand, when producing the deterioration of optical distortion and remolding sensitivity, distortion that might can not correction image can not correctly obtain vein image.
Therefore, by the optical distortion with lens unit be-2%～+ 50%, paraxial multiplying power is more than 0.04 below 0.06, the remolding sensitivity at thing side maximum field of view angle is that the mode below 65% constitutes lens unit more than 40%, can eliminate this shortcoming.
By said method, imaging apparatus 30 also can precision in the zone at the thing side maximum field of view angle of lens unit obtains the vein pattern in referring to well.
The Flame Image Process and the authentication function of finger vein authentication apparatus then, are described.Figure 10 is the block diagram of structure example of the image processing apparatus of expression finger vein authentication apparatus.Image processing apparatus has from the image correction portion of the distortion of the pattern extracting part of the vein pattern of being pointed by extraction the image of imaging apparatus shooting and correction image.
CPU (Central Processing Unit: 60 operations central processing unit) according to the user, opening entry is in the image processing program of storer 64, to DSP (Digital SignalProcessor: digital signal processor) 62 send the instruction that is taken into image from imaging apparatus 30.CPU60 is taken into the brightness data of each pixel of imaging apparatus 30 from DSP62, judge whether mounting has finger on framework 10.
Under the situation that does not have the mounting finger on the framework 10, exterior light arrives imaging apparatus 30, because the brightness of pixel is brought up to more than the setting, does not have the mounting finger so CPU60 judges on framework 10.
Upload when being equipped with finger when CPU60 judges in framework 10, check the brightness of each pixel of the image that obtains by imaging apparatus 30, individually control from a plurality of irradiations mouthful 14 light quantities that penetrate in even brightness mode in each pixel.Particularly, control is supplied to the drive signal of shining each light source of mouthful 14 corresponding configurations with each, by revising the luminous quantity of light source, the light quantities that control is penetrated from irradiation mouth 14.
Below, fader control is elaborated.Because suitable light quantity according to the width that shows the finger on finger vein authentication apparatus with thickness and different, so for clearly must be according to the light quantity of the feature adjustment light source of each finger to referring to that vein image is photographed.
For example, under the situation of thinner thickness of finger because compare the tendency that brightness uprises with thicker finger, institute so that light quantity tail off.In addition, far away because the thicker finger of the thinner finger of width and width compares from the distance of illumination loophole finger in one's hands, so light is difficult to transmit.For the light of the amount that irradiation is enough on finger, must strengthen the light quantity that penetrates from illumination loophole 14.
In addition, even same finger, since different in the finger tip side with the width that refers to the root side, so suitable light value is also different.Therefore, control the light value of finger tip side and finger root side respectively independently.In addition, utilize the finger tip characteristic thicker of finger, adjust light quantity in advance, control the finger tip side simultaneously, refer to that the light quantity of root side is also passable in the mode of the light quantity grow of finger tip side than the microdactylia root.
And, must be under the situation of the identical light quantity of finger irradiation, can be that it is approaching more the closer to finger tip with the position configuration of light source from each light source, super close finger root side its get over away from.And then, consider the left and right sides asymmetry of the shape of finger, when finger is positioned on the framework about offset, the preferred also light value about control independently.CPU60 judges the offset, the thickness of finger etc. of left and right directions of asymmetry, the finger of the shape of finger according to the situation of the brightness irregularities between a plurality of pixels, side, the finger tip about independent control finger refers to the light source of root side.
When CPU60 judges that the correction of light quantity finishes, send the instruction of carrying out the image of being taken by imaging apparatus 30 is carried out the distortion correction to DSP62.The distortion correction is to be undertaken by calculation according to the distorted characteristic of having stated.Therefore, before finger vein authentication apparatus dispatches from the factory, ask for the distorted characteristic of lens unit 38 in advance, in storer 64, preserve distorted characteristic.DSP62 is with reference to this distorted characteristic, and each pixel of the image that obtained by imaging apparatus 30 is carried out the distortion correction.
When distortion is X%, multiply by modified value (100/X) on the correction object pixel in image, based on resulting in, revise the location of pixels of relative picture centre (optical axis).Under distortion was positive situation, location of pixels was by to the correction of optical axis side, when distortion for negative situation under, location of pixels to from optical axis away from direction revise.As a result, example can be revised the image of distortion as shown in Figure 6 and Figure 7.
CPU60 is stored in the revised image of distortion in the storer 64, and CPU60 carries out deep or light judgement to each pixel of revised black white image, extracts vein pattern (feature point extraction) from revised image.
Near infrared light from light source irradiation to finger is absorbed by the haemoglobin the vein, spreads to all directions by its hetero-organization on the other hand, and therefore the light scioptics unit 38 that sees through of corresponding vein pattern arrives imaging apparatus 30.In the pixel region suitable, see through light because be absorbed, so obtain the black white image of the regional deepening suitable by imaging apparatus 30 with vein pattern with vein pattern.
CPU60 detects vein pattern from this black white image, use detected vein pattern to carry out organism authentication.Particularly, the vein pattern that is extracted by finger vein authentication apparatus is like this logined in storer 64, the vein pattern of logining is consistent or inconsistent judgement with the new vein pattern that extracts, thereby whether decision meets authenticate himself.
Be equipped at finger vein authentication apparatus under the situation of signal conditioning package of portable phone etc. or by under wired or wireless and the situation that external device (ED) is connected, CPU60 gives signal conditioning package, external device (ED) with the result notification of authenticate himself, use this notice, signal conditioning package etc. provide the various services of e-business transaction, Web bank to the user.
Figure 27 is that focal length is the following short focus lens unit of the above 0.20mm of 0.15mm, use that optical distortion is-2%～+ 50%, paraxial multiplying power is more than 0.04 below 0.06, the remolding sensitivity at thing side maximum field of view angle is more than 40% and conjugate distance from being the lens unit below the 8mm, with the same condition of Fig. 6 under the image that obtains by imaging apparatus.As shown in Figure 27, because in image, produce distortion, so image processing apparatus is so that the mode correction distortion that this distortion disappears around the central part of the image that obtains by imaging apparatus 30.
When image processing apparatus carried out the correcting process of image, the application's inventor obtained the image of said reference printed article by imaging apparatus, and the image of obtaining is put into image processing program.Then, utilize whole pixel decisions separately the modified value stated of image processing program, these are kept in the storer as parameter the image before revising.
In size, the characteristic difference of lens unit, and under the different situation of the size of framework 10 (size that sees through light entrance 20 of slot part 12), for the structures shape parameter separately of each mode.The parameter of decision is preestablished in the storer 64 that is stored in image processing apparatus.DSP62 reads in parameter from storer 64, carries out the correction of image.
In the above description, after having carried out the distortion correction, carry out feature point extraction and handle, but also can after from image, extracting vein pattern out, carry out the distortion correction by the feature point extraction processing.
In this case, can be restricted to the pixel count suitable, can reduce DSP62 and carry out the distortion correction advantage in required processing time so have with vein figure as the object pixels number of distortion correction.Compare with the situation of whole pixels being carried out the distortion correction,, can make the pixel count that to revise be reduced to about 1/8 by after feature point extraction, carrying out the distortion correction.
And in the example of Figure 10, CPU60, DSP62 and storer 64 separately constitute respectively, but are not limited thereto, and also these part or all can be constituted a handling part.
In addition, under the situation on the signal conditioning package that finger vein authentication apparatus is carried at portable phone etc., replace CPU60 etc. is set in authenticate device, also can use the CPU etc. of signal conditioning package to carry out Flame Image Process and authentication.
In addition, also part or all of Flame Image Process and authentication function can be transferred to server one side from signal conditioning package.In addition, replace storage vein pattern data in finger vein authentication apparatus, signal conditioning package, also can in server, login pattern data.And, under with the situation of vein pattern login in finger vein authentication apparatus, signal conditioning package etc., also can after being implemented to encrypt, login vein pattern, and make it does not read by other people.
Then the embodiment that finger vein authentication apparatus is applied to portable phone is elaborated.Because the distance between finger bottom and imaging apparatus is shortened, so in the small-sized signal conditioning package of portable phone etc., maximization that also can restraining device, and finger vein authentication apparatus carried on signal conditioning package.
Figure 11 (1) is the planimetric map of the framework 52 of portable phone, and Figure 11 (2) is its right hand view, and (3) are its front view (FV)s.In this example, near the hinge (hinge) of portable phone, be equipped with vein authentication apparatus 50.In order to make the user can recognize the existence of vein authentication apparatus 50 easily, the framework 10 of vein authentication apparatus 50 is projection slightly from the surface of the framework 52 of portable phone.
As shown in figure 12, the user can be only to be hold by one hand portable phone and first juxtra-articular of forefinger be placed on the vein authentication apparatus 50.With can be by being hold by one hand portable phone 50 under stable status, and the mode that overlaps with vein authentication apparatus of first juxtra-articular that makes the finger of authentication object, preferably the front end with vein authentication apparatus 50 is arranged on apart from the position of the about 3cm in front end end of portable phone.
In addition, as shown in figure 13, vein authentication apparatus 50 also can be arranged near the open end of portable phone.In this case, the cardinal extremity of authenticate device is arranged on apart from the open end of portable phone for position from the roughly corresponding about 3cm of the interarticular distance of finger tip to the first.By being configured in such position, to place on the vein authentication apparatus 50 under the situation of finger, the second joint of finger nature and crooked lenitively can prevent that finger is excessively by being pressed on the vein authentication apparatus 50.
In the example of Fig. 5, Figure 11 etc., finger vein authentication apparatus is arranged on the planar portions of the framework 52 of portable phone, but is not limited thereto, as long as on the surface of framework 52, also finger vein authentication apparatus can for example be set on the side.
More than the example that is equipped with finger vein authentication apparatus on portable phone is illustrated, but the object that is suitable for finger vein authentication apparatus is not limited to portable phone, also can be applied in the various signal conditioning packages such as PDA, notebook computer certainly.In addition, be not limited to signal conditioning package, also finger vein authentication apparatus of the present invention can be carried in automobile, I/O management device etc.
Figure 14 is the A-A cross section legend of Fig. 1, and Figure 15 is its B-B cross section legend.Figure 14 and Figure 15 represent the state that finger vein authentication apparatus becomes one and is received with portable phone in portable phone 52.That is, framework 10 also double as be the framework of portable phone.And, be that same-sign means and is identical parts with above-mentioned accompanying drawing, omit its explanation.
In the framework of portable phone 52, be embedded with LED72 as light source.Be formed with through hole 74 from the top of LED72 along the right angle orientation of the Width of LED relatively framework 10, this through hole 74 is connected with irradiation mouth 14.The near infrared light that penetrates from LED72 is by through hole 74, advances to finger from irradiation mouthfuls 14.Because near pointing the bottom, be provided with wall 16, so enter in the finger above the side of wall 16 from finger from the light of LDE72 irradiation along the length direction of pointing.
From the light that enters of side of the finger internal divergence at finger, and a part arrives imaging apparatus 30 1 sides by vein, and lens unit 38 carries out imaging according to seeing through the image that light will be suitable with vein pattern on imaging apparatus 30.
Figure 17 represents another example of the inner structure of finger vein authentication apparatus.In the example of Figure 14,, be configured with the center of irradiation mouth 14 and the roughly consistent mode in center of LED72 in order to make light from irradiation mouthful 14 effectively ejaculations.Because irradiation mouth 14 is arranged on the outside of wall 16, like this, when LED72 was configured in the mode that cooperates with the center of shining mouth 14, it is big that the width of finger vein authentication apparatus becomes.
Relative therewith, in example shown in Figure 17,, make narrowed width by the photoconduction 90 that the light that will produce from LED72 guides to irradiation mouth 14 is set.
Thus, keep light be provided with from irradiation mouthful 14 centers of penetrating, and can make LED72 effectively according to the center of loophole 14 more in the inner part, thereby can reduce the width of finger vein authentication apparatus.
In addition, this photoconduction 90 can be provided with each LED72 of each irradiation mouthful 14 corresponding configuration relatively, and a plurality of LED72 that also can be oppositely arranged on left side and right side are provided with a photoconduction respectively.
And, be provided with respectively under the situation of a photoconduction in left side and right side, replace having a plurality of irradiations mouths, also can a rectangle or oval-shaped irradiation mouth be set respectively along wall 16.By such irradiation mouth is set, can the shared photoconduction of a plurality of relatively LED, and can be in the side of finger irradiates light equably.In addition, be not only left and right directions, the irradiation mouth of the shape with rectangle etc. also can be set at above-below direction.
Figure 18 be illustrated in framework 10 about and above-below direction be provided with the example of rectangular-shaped irradiation mouth 14A.And in this example, the projection 18A that the position is set in first joint of indication finger constitutes in mode side-prominent in the Width of framework 10, cooperates with the peripheral shape of finger to the small pieces 22A of the side directed finger of groove, and cone-shaped becomes the R shape.
Then, describe the shape of the wall of having stated 16 in detail.Figure 19 (1) is the figure that sees the authenticate device of having stated shown in Figure 1 from the finger tip side.Figure 21 and Figure 22 represent other modes of wall 16.
Shown in Figure 19 (1), the width of wall 16 and roughly the same to the distance the end edge in the framework outside of slot part 16 from the end edge of the framework inboard of illumination loophole 14.As shown in figure 21, the width that also can make wall 16 is narrower than Figure 19's (1), near illumination loophole 12 sides wall 16 is arranged on the framework.Thus, the fulcrum of supporting finger can be placed on finger the lower position of relative framework to the outer side shifting of finger.Therefore, wall 16 height of finger relatively relatively uprises, and light source 3 is irradiates light on the higher position of finger only.
Further, as shown in figure 22, wall 16 also can cooperate the peripheral shape of finger to form the R shape.Thus, because the contact area of finger and wall 16 increases, can improve wall 16 blocking-up and spread to the effect of the light of the bottom surface of pointing.Because the form fit of wall 16 and the side of finger, thus wall 16 relatively framework stably support finger.
The position on the plane of the upper end of light source 3 and framework 10 is an equal height, and perhaps, light source 3 is arranged on the framework in low slightly mode, avoids light source outstanding from the plane of framework.
If can then also can cover the part of the upper end of light source 3 by wall 16, framework 10 from light source to the enough light quantities of finger irradiation.For example shown in Figure 23, when the mode under the part with light source 3 is hidden in wall 16 is configured, light source 3 can be provided with near the inboard (slot part 12 sides) of installing.Thus, can shorten the width of authenticate device.
Figure 24 is with according to regional difference and the different light filter (Off イ Le ) 230 of the light extinction rate of light is arranged on the finger vein authentication apparatus on the framework.Figure 24 (1) is the sectional view of device, and Figure 24 (2) is a planimetric map, and Figure 24 (3) is a light filter 230.The light extinction rate of the area light that the color of light filter is dense more is high more, and the light extinction rate of light more area light is low more.
When shown in Figure 24 (2), when by the authenticate device that is provided with light source at the side of pointing vein being photographed, the image of shooting is in that the regional luminance value near light source is high more more, and is low more the closer to the middle section brightness value of image.Therefore, as Figure 24 (1) be shown in the finger and imaging apparatus 30 between light filter 230 is set.Thus, the amount of light that arrives imaging apparatus 30 zone and middle section about finger are impartial, can photographic images integral body be the vein image of uniform lightness.In addition, also light filter 230 can be set, image processing apparatus by imaging apparatus 30 to each pixel gain, the sensitivity control of shutter speed etc.Because the pixel sensitivity degree the closer to light source side is low more, high more the closer to the sensitivity of the pixel of central authorities, so can access the effect identical with the situation that is provided with light filter 230.
Further, the finger vein authentication apparatus to photoconduction with mode different with the photoconduction of stating mode describes.With regard to this photoconduction, as shown in figure 28, the device side side 280 of photoconduction 90 is along gravity direction, the conical surface that the side 282 of a side relative with this side becomes the relative gravity direction, tilts to device side along with the top of close device.
By making photoconduction become such shape, the direction that can make the light that penetrates from photoconduction is towards the side of finger, preferably as shown in figure 28, can make the direction 284 of light become the tangential direction of relative finger 24.
According to present inventor's research as can be known, the size of considering average people's finger is that diameter is 14mm, if the light that makes the relative gravity direction have about 18 °～28 ° angle (θ) from photoconduction penetrates to the side of finger, then can access at the fabulous image of the homogeneity of picture integral brightness level.
And, by such formation photoconduction, also the light from light source 72 can be guided to the side of finger 42 even without wall 16, can from framework 10, omit the wall of having stated 16, perhaps, can reduce the height of wall 16, thereby make the thickness of framework also reduce corresponding amount.And, shown in the dotted line of Figure 28, also highly lower wall 16 can be configured in a side (the central shaft side of framework 10) (with reference to Figure 17) than photoconduction 90 more close fingers.
Figure 29～Figure 31 represents the stereographic map of photoconduction integral body.Photoconduction 90 constitutes tabular along the length direction of framework 10.Symbol 72 is the LED as light source that is arranged on the lower end of photoconduction, and symbol 73 is control basal plate of LED72.LED is arranged at two positions altogether in the end of the length direction of photoconduction.
Figure 30 (1) is the stereographic map of another example of expression photoconduction, disposes 5 led light sources along the length direction of photoconduction.Increase the number of LED72, can obtain the image that has good uniformity in the picture integral brightness level.The number of LED72 is not particularly limited, and is preferably less from the viewpoint of power consumption.And, shown in Figure 30 (2), also can be that the height H of photoconduction is shorter than the height of the slot part 90J of the framework 10 of holding photoconduction, the end face 90H of photoconduction just finishes below light exit wound of bullet 14.
Figure 31 is the stereographic map of the another example of expression photoconduction, and expression is divided into two parts with photoconduction at the thickness direction of framework.
And, photoconduction is being divided in the two-part structure like this, two photoconduction (90A of cutting part, two end faces 90B) are separated from each other, and the end face 93 of the end face 91 relative second photoconduction 90A of the first photoconduction 90B that supplies to by the light that makes at first from LED forms dome shape or aspherical shape, can make the light of supplying with the first photoconduction 90B from LED72 become directional light and guide to the second photoconduction 90A.Thus, can make from the side of the extremely above-mentioned finger of the further vector preferably of direction of light of second photoconduction 90A ejaculation.
The end face of the finger side of photoconduction, in any of Figure 29～Figure 31, all be depicted as flat condition, but it also can be ring-types such as spherical shape or R shape, perhaps, from the outside of framework 10 towards the inside height step-down, or its taper that uprises highly on the contrary (blade-like) etc., wavy, the perhaps acyclic shape of microlens array etc.
Photoconduction is made of transparent glass or transparent resin.The photodiffusion material that also can have silicon, aluminium etc. in the photoconduction.
Figure 32 is the synoptic diagram that the photoconduction 90 relative frameworks 10 about expression constitute asymmetrical shape.On the electronic equipment that vein authentication apparatus is carried at portable phone etc. the time, must design the structure of vein authentication apparatus in the mode of avoiding the original parts of electronic equipment.
Figure 32 is one of them example, and the LED72 that makes to the right photoconduction supply with light moves to the upper side of framework, is bent into the right angle towards this LED72 near the terminal of photoconduction 90.
Further, as shown in figure 33, the height and position on the framework 10 of the exit wound of bullet 14 (with reference to Figure 19) of the light that can face according to photoconduction 90, or the height of photoconduction 90, the mode that uprises, becomes taper than the finger tip side at palmar is gradually adjusted framework 10.In Figure 33, symbol 90L represents the upper end of photoconduction.
This is because also be that the diameter of finger of finger tip side is littler than the diameter of the finger that refers to the root side at first juxtra-articular of finger.That is, for light being guided to the center of the side of finger, and change the position of exit wound of bullet like this.By changing the position of exit wound of bullet, also can suitably change photoconduction height, refer to the shape of side end face.
In the above-described embodiment, constitute lens unit by two lens, as long as but have the lens peculiarity of requirement, also can constitute lens unit by lens or the lens more than three.
In addition, the applicable object of vein authentication apparatus of the present invention is not limited to portable phone, also can be applied to various signal conditioning packages such as PDA, notebook computer certainly.In addition, be not limited to signal conditioning package, this finger vein authentication apparatus also can carry in automobile, I/O management device etc.
In addition, above-mentioned framework is provided with the teat as the indicating member of the position of indicating first joint of placing finger.Be not limited thereto, also can use expression to place other the indicating means such as sign, mark of position in first joint of finger.
In addition, in the above-described embodiment finger vein authentication apparatus is arranged on the plane of portable phone, finger vein authentication apparatus also can be arranged on side, front or the bottom surface of bottom surface, portable phone of portable phone.
In addition, on framework 10, show the veutro of finger in the above-described embodiment, the vein that refers to veutro is photographed, but also can on framework 10, show side, the nail-side of finger, utilize the vein of finger side, nail-side to authenticate.Particularly under the situation that the nail-side of finger is photographed, when implementing photography under the state that is flexing one's fingers, can clearly carry out the photography of vein.
In addition, in the above-described embodiment the first joint periphery of finger is photographed, but also can use the second joint periphery of finger, the position beyond the joint to authenticate.
More than Shuo Ming embodiment is an example, the embodiment that the present invention is not limited to state.
Claims (19)
1. finger vein authentication apparatus is characterized in that having:
The framework of mounting finger;
Penetrate the light source of light in the finger of described framework to mounting;
The imaging apparatus of the inside of described finger being taken by described light;
Having will be from the lens devices of described light lens unit of imaging on described imaging apparatus of described finger; With
The image processing apparatus of image correction portion with distortion of the pattern extracting part of the vein pattern that from the image of taking by described imaging apparatus, extracts described finger and correction image.
2. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
The focal length of described lens unit is below the above 0.5mm of 0.15mm,
The maximum field of view angle of its thing side is more than 100 °,
Its paraxial multiplying power is more than 0.04 below 0.1,
Its optical distortion is-60%～+ 50%, and,
Distance between described finger and the described imaging apparatus is below the above 12mm of 5mm.
3. finger vein authentication apparatus as claimed in claim 2 is characterized in that:
The focal length of described lens unit is below the above 0.20mm of 0.15mm,
Its paraxial multiplying power is more than 0.04 below 0.06,
Its optical distortion is-2%～+ 50%, and,
Distance between described finger and the described imaging apparatus is below the 8mm.
4. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
The remolding sensitivity that described lens unit constitutes at thing side maximum field of view angle is restricted to specialized range.
5. finger vein authentication apparatus as claimed in claim 4 is characterized in that:
The remolding sensitivity at described thing side maximum field of view angle of described lens unit is more than 10% below 65%.
6. finger vein authentication apparatus as claimed in claim 5 is characterized in that:
The remolding sensitivity at described thing side maximum field of view angle of described lens unit is more than 40% below 65%.
7. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Described light source constitutes in the mode of side-irradiation near infrared light from finger.
8. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Described lens unit is made of concavees lens and convex lens.
9. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
After the distortion of described image correction portion's correction by the image of described imaging apparatus shooting, described pattern extracting part extracts described vein pattern from the described image of having revised.
10. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Described pattern extracting part is extracted described vein pattern out from the described image of having taken after, the distortion of the described vein pattern of having extracted out of described image correction portion's correction.
11. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Have and to guide to the photoconduction of the irradiation mouth of the described light that is arranged at described framework from the light that described light source produces.
12. finger vein authentication apparatus as claimed in claim 11 is characterized in that:
The exit wound of bullet of described light is arranged near the side of long side direction of described finger the described framework.
13. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Described framework is provided with the indicating member of the position of indicating first joint of placing described finger.
14. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Side along described finger on described framework is provided with teat.
15. finger vein authentication apparatus as claimed in claim 1 is characterized in that:
Described lens unit is short burnt wide-angle lens unit.
16. a finger vein authentication apparatus is characterized in that, comprising:
The framework of mounting finger;
Penetrate the light source of light to described finger;
The imaging apparatus of the inside of described finger being taken by described light;
Having will be from the lens devices of described light lens unit of imaging on described imaging apparatus of described finger;
The image processing apparatus of image correction portion with distortion of the pattern extracting part of the vein pattern that from the image of taking by described imaging apparatus, extracts described finger and correction image; With
To guide to the photoconduction of the irradiation mouth of the described light that is arranged at described framework from the light that light source produces,
The exit wound of bullet of described light is arranged near the side of long side direction of described finger the described framework,
Described photoconduction makes the light from described light source penetrate towards the side of described finger.
17. finger vein authentication apparatus as claimed in claim 16 is characterized in that:
Described photoconduction penetrates light along the tangential direction of the side of described finger from described exit wound of bullet.
18. a signal conditioning package is characterized in that, comprising:
The described finger vein authentication apparatus of claim 1; With
Carry out personal authentication's person authentication device based on image from the vein pattern of revising described distortion of this finger vein authentication apparatus output, and,
Based in the authentication result of this person authentication device and carry out electronic processing.
19. a signal conditioning package is characterized in that, comprising:
The described finger vein authentication apparatus of claim 16; With
Carry out personal authentication's person authentication device based on image from the vein pattern of revising described distortion of this finger vein authentication apparatus output, and,
Based in the authentication result of this person authentication device and carry out electronic processing.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007165614 | 2007-06-22 | ||
| JP2007165614 | 2007-06-22 | ||
| JP2007246024 | 2007-09-21 | ||
| JP2007259169 | 2007-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101329729A true CN101329729A (en) | 2008-12-24 |
Family
ID=40205531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100885423A Pending CN101329729A (en) | 2007-06-22 | 2008-03-27 | Finger vein authentication apparatus and information processing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009032227A (en) |
| CN (1) | CN101329729A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866419A (en) * | 2009-04-14 | 2010-10-20 | 株式会社日立制作所 | Person authentication device |
| CN103405216A (en) * | 2013-04-09 | 2013-11-27 | 衢州亿龙信息技术有限公司 | Superficial vein shooting device |
| CN103987317A (en) * | 2011-12-19 | 2014-08-13 | 索尼公司 | Measurement device, measurement method, program, and recording medium |
| CN104036230A (en) * | 2014-03-21 | 2014-09-10 | 中山微盾信息科技有限公司 | Ultra-thin finger vein recognition system |
| CN104615975A (en) * | 2015-01-16 | 2015-05-13 | 深圳市维亿魄科技有限公司 | Mobile terminal and vein recognition device thereof |
| CN104661595A (en) * | 2012-09-28 | 2015-05-27 | 希森美康株式会社 | Non-invasive living body measurement device |
| CN105249931A (en) * | 2015-11-13 | 2016-01-20 | 财团法人车辆研究测试中心 | Multifocal condensing physiological sensing device |
| CN106169055A (en) * | 2015-05-21 | 2016-11-30 | 秦皇岛鸿大科技开发有限公司 | Based on the bluetooth mobile memory referring to hand vein recognition |
| CN108292424A (en) * | 2015-12-08 | 2018-07-17 | 株式会社日立制作所 | Finger vein authentication apparatus |
| CN110197161A (en) * | 2019-05-31 | 2019-09-03 | Oppo广东移动通信有限公司 | Vein identification method and Related product |
| CN110737080A (en) * | 2018-07-19 | 2020-01-31 | 新巨科技股份有限公司 | Thin imaging lens group |
| TWI696859B (en) * | 2018-06-27 | 2020-06-21 | 新鉅科技股份有限公司 | Compact optical lens system |
| WO2022193266A1 (en) * | 2021-03-19 | 2022-09-22 | 南京东屋电气有限公司 | Finger vein image acquisition device and use method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4997305B2 (en) * | 2010-03-12 | 2012-08-08 | 株式会社日立製作所 | Finger vein authentication device |
| WO2014162388A1 (en) * | 2013-04-01 | 2014-10-09 | 富士通フロンテック株式会社 | Palm vein image capture device |
| CN104598797B (en) * | 2015-02-12 | 2016-03-09 | 张丽琴 | A kind ofly adopt face recognition, authenticate device that facial vena identification combines with finger vena identification and authentication method |
| WO2019021951A1 (en) | 2017-07-26 | 2019-01-31 | 日本電気株式会社 | Fingerprint reading device |
| CN115398473A (en) * | 2020-05-21 | 2022-11-25 | 富士通株式会社 | Authentication method, authentication program, and authentication device |
-
2007
- 2007-09-21 JP JP2007246024A patent/JP2009032227A/en active Pending
-
2008
- 2008-03-27 CN CNA2008100885423A patent/CN101329729A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866419A (en) * | 2009-04-14 | 2010-10-20 | 株式会社日立制作所 | Person authentication device |
| CN103987317B (en) * | 2011-12-19 | 2016-08-24 | 索尼公司 | Measurement equipment and method |
| CN103987317A (en) * | 2011-12-19 | 2014-08-13 | 索尼公司 | Measurement device, measurement method, program, and recording medium |
| CN104661595A (en) * | 2012-09-28 | 2015-05-27 | 希森美康株式会社 | Non-invasive living body measurement device |
| CN103405216A (en) * | 2013-04-09 | 2013-11-27 | 衢州亿龙信息技术有限公司 | Superficial vein shooting device |
| CN104036230A (en) * | 2014-03-21 | 2014-09-10 | 中山微盾信息科技有限公司 | Ultra-thin finger vein recognition system |
| CN104615975A (en) * | 2015-01-16 | 2015-05-13 | 深圳市维亿魄科技有限公司 | Mobile terminal and vein recognition device thereof |
| CN106169055A (en) * | 2015-05-21 | 2016-11-30 | 秦皇岛鸿大科技开发有限公司 | Based on the bluetooth mobile memory referring to hand vein recognition |
| CN105249931A (en) * | 2015-11-13 | 2016-01-20 | 财团法人车辆研究测试中心 | Multifocal condensing physiological sensing device |
| CN105249931B (en) * | 2015-11-13 | 2018-04-17 | 财团法人车辆研究测试中心 | Multifocal optically focused physiological sensing device |
| CN108292424A (en) * | 2015-12-08 | 2018-07-17 | 株式会社日立制作所 | Finger vein authentication apparatus |
| CN108292424B (en) * | 2015-12-08 | 2021-05-07 | 株式会社日立制作所 | Finger vein authentication device |
| TWI696859B (en) * | 2018-06-27 | 2020-06-21 | 新鉅科技股份有限公司 | Compact optical lens system |
| CN110737080A (en) * | 2018-07-19 | 2020-01-31 | 新巨科技股份有限公司 | Thin imaging lens group |
| CN110197161A (en) * | 2019-05-31 | 2019-09-03 | Oppo广东移动通信有限公司 | Vein identification method and Related product |
| WO2022193266A1 (en) * | 2021-03-19 | 2022-09-22 | 南京东屋电气有限公司 | Finger vein image acquisition device and use method thereof |
| CN115668312A (en) * | 2021-03-19 | 2023-01-31 | 东屋世安物联科技(江苏)股份有限公司 | Finger vein image acquisition device and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009032227A (en) | 2009-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101329729A (en) | Finger vein authentication apparatus and information processing apparatus | |
| CN101334841B (en) | Finger vein authentication unit and information processing unit | |
| US10360431B2 (en) | Electronic device including pin hole array mask above optical image sensor and related methods | |
| CN209640882U (en) | Optical sensor arrangement and electronic equipment | |
| CN101189620B (en) | Multispectral biometric sensors | |
| US8913119B2 (en) | Short distance iris recognition camera | |
| CN104274151B (en) | Sight line detector and method for detecting sight line | |
| Yamada et al. | Privacy visor: Method for preventing face image detection by using differences in human and device sensitivity | |
| CN109196524A (en) | Optical imagery under screen in equipment with Organic Light Emitting Diode (OLED) screen or other screens for shielding upper fingerprint sensing in optical sensor module via imaging len and image pinhole | |
| CN103400104A (en) | Personal identification apparatus | |
| CN110472618A (en) | Shield the sensor module of lower finger print identifying and shields lower fingerprint certification device | |
| CN107949863A (en) | Use the authentication device and authentication method of Biont information | |
| CN106132284A (en) | Optical eye is dynamic follows the trail of | |
| JP5268293B2 (en) | Mobile terminal with personal authentication function | |
| CN106464806A (en) | Adaptive low-light identification | |
| CN108461045A (en) | Display device and its manufacturing method | |
| CN103929566A (en) | Biometric Information Image-capturing Device And Biometric Authentication Apparatus | |
| JP2016189186A (en) | Biometric authentication sensor for detecting blood vessel of wrist with wrist strap | |
| TWI490526B (en) | Optical sensing module and electronical apparatus having the same | |
| CA3096658A1 (en) | System and method for image recognition registration of an athlete in a sporting event | |
| JPWO2011052323A1 (en) | False finger determination device and false finger determination method | |
| CN102855626A (en) | Methods and devices for light source direction calibration and human information three-dimensional collection | |
| US10935775B2 (en) | Method and apparatus that enhance the viewing experience of digital displays for long sighted users | |
| CN106908951A (en) | Virtual reality helmet | |
| CN102254168B (en) | Living human fingerprint/palm print image acquisition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081224 |