JP2008123312A - Vein image collation device, and personal identification device and personal identification system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vein image collation device and a personal identification device using the same capable of instantly detecting such illegal use that a vein pattern is attached to a fake finger to give warning. <P>SOLUTION: The vein image collation device includes an illumination means for emitting infrared light to a living body, a plurality of imaging means for imaging by receiving the infrared light emitted to the living body, and a calculation means for calculating three-dimensional position information of the vein pattern from image data imaged by the plurality of imaging means, calculates the three-dimensional position information of the vein pattern from the image information of the vein pattern imaged by the plurality of imaging means by the calculation means, determines whether the image is an image of a vein pattern in a living body by the position information of the vein pattern, and outputs a determination result. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vein image matching device that shoots a vein image by irradiating a finger or face of a user of an electronic device with infrared light, and matches the captured vein image with data registered in a storage unit in advance, and The present invention relates to the personal authentication device and personal authentication system used.

  Image the veins of the finger of the user of the electronic device, extract the features by image processing the vein image, and verify the features against the vein images registered in the database in advance to authenticate visitors, users of the electronic device, etc. There is known a personal authentication system for performing (see, for example, Patent Document 1).

  FIG. 9 shows a schematic cross-sectional view of a conventional vein image matching apparatus 700. In FIG. 9, a vein image matching device 700 has a hole 72 into which a finger 80 is inserted in a substantially cubic housing 70, and an illumination means 75 in which LEDs and the like are arranged above the housing. An imaging unit 71 such as a CCD is provided below the body. In the figure, reference numeral 77 denotes a transparent guide plate that guides the finger when the finger is inserted. A switch 76 is provided in the back of the housing so that when the finger 80 is put into the housing 70, it can be pushed with the fingertip.

  When a visitor, a user of an electronic device or the like puts the finger 80 through the hole 72 of the vein image matching device 700 along the guide plate 77 and presses the switch 76, the illumination means 75 is turned on and the infrared light is indicated. 80 is irradiated. Infrared light emitted from the illumination means 75 is scattered inside the finger and then radiated to the outside. At this time, since infrared light is absorbed by hemoglobin in the blood, for example, the vein of the finger 80 is imaged by the imaging unit 71 as a dark shadow pattern 41 as shown in FIG. It is possible to perform personal authentication by comparing the vein image 41 with data registered in the storage means in advance to determine whether or not the user is a registrant.

  For this type of vein image matching device, a malicious user creates a forged pattern sheet by drawing a forged pattern with a material that absorbs infrared light on a transparent sheet, and then forged a forged finger made of a transparent material. A sheet may be pasted and inserted into the vein image matching device. In such a case, the infrared light irradiated from the illumination means 75 is absorbed by the forgery pattern, and the imaging means images the forgery pattern as a vein pattern. Therefore, if the forgery pattern matches the data registered in the storage means, the user is mistakenly authenticated as a registrant.

For this reason, another conventional vein image matching apparatus has been proposed in which a plurality of second illumination means 72 are provided on both sides of the imaging unit 71 to detect counterfeit patterns as shown in FIG. . In the vein image collation apparatus 500 in FIG. 7, the irradiation of the infrared light from the illumination unit 75 and the irradiation of the light from the second illumination unit 72 are switched and used. When the living finger is inserted normally, the infrared light irradiated from the illumination means 75 passes through the living finger and images the vein pattern as shown in FIG. Next, when the illumination means 75 is turned off and the second illumination means 72 is turned on, the light irradiated by the second illumination means 72 is reflected by the surface of the finger 80, so the photographed image is shown in FIG. It becomes an image like this. In the image of FIG. 8B, the vein pattern is hardly visible. Even if the second illumination means 72 irradiates infrared light instead of white light, the reflected light is imaged, so that the very unclear vein pattern 40 remains visible. However, when a forged finger with a forged pattern sheet attached is inserted, a forged pattern is imaged as shown in FIG. 8C by reflected light of light emitted from the second illumination means 72. Therefore, if the captured image is FIG. 8B, it is determined to be a real living finger, and if it is FIG. 8C, it is determined to be a forged finger with a forged pattern attached. it can. As a result, it is possible to detect and warn that a malicious user has inserted a forged finger that is not a living body with a forged pattern attached thereto into the vein image matching device.
Japanese Patent Laying-Open No. 2005-71118 (page 10, FIG. 3)

  However, a so-called half mirror is interposed under a forgery finger that is not a living body with a forged pattern, and the half mirror transmits light from the illumination means 75 but reflects light from the second illumination means 72. In this case, the light from the second illumination means 72 is reflected by the half mirror, and the image shown in FIG. Therefore, it cannot be determined that a forged finger that is not a living body with a forged pattern attached is inserted, and if the same vein pattern as the forged pattern is registered in the database, the user is mistakenly authenticated as a registrant.

  Further, if a forged finger is made of a semi-transparent material with low transparency and a forged pattern sheet sandwiched in a sandwich shape is inserted into the vein image matching device, the light from the second illumination means 72 is forged. The image shown in FIG. 8B is reflected on the imaging unit 71 after being reflected by the surface of the finger. Therefore, it cannot be determined that a forged finger sandwiching a forged pattern sheet is inserted, and the user is erroneously authenticated as a registrant.

  This means that even in a personal authentication system that captures a facial vein pattern using a high-sensitivity imaging means and collates it with a vein pattern registered in the storage means, it wears a mask with a facial vein counterfeit pattern attached. If a half mirror is interposed between the imaging means or a counterfeit pattern sheet is affixed to the inside of a mask made of a translucent material, the user is mistakenly authenticated as a registrant.

  The present invention solves the above-described conventional problems, and can determine whether a subject imaged by a vein image matching device is a real living body or a forged living body to which a forged pattern sheet depicting a forged pattern is attached. It is an object of the present invention to provide a collation device and a personal authentication device or personal authentication system using the collation device.

  The vein image matching device according to the present invention includes an illuminating unit that irradiates a living body with infrared light, a plurality of imaging units that receive and image infrared light irradiated on the living body, and image data captured by the plurality of imaging units. Calculation means for calculating the three-dimensional position information of the vein pattern, storage means for storing the three-dimensional position information on the skin surface of the living body irradiated with infrared light, three-dimensional position information of the vein pattern and the living body skin Comparing means for comparing the three-dimensional position information of the surface is provided, the three-dimensional position information of the vein pattern is calculated from the image information of the vein pattern imaged by the plurality of imaging means by the calculating means, and the storing means is stored by the comparing means. By comparing the stored three-dimensional position information of the vein pattern and the three-dimensional position information on the skin surface of the living body, it is determined whether or not the vein pattern is located in the living body, and the determination result is output. It is configured to.

  With the above configuration, when a forged finger with a forged pattern attached to the surface is inserted, it can be quickly determined.

  The vein image matching device of the present invention includes an illumination unit that irradiates a living body with infrared light, a plurality of imaging units that receive and image infrared light irradiated on the living body, and image data captured by the plurality of imaging units. A calculating means for calculating the three-dimensional shape of the vein from the database, a database in which the three-dimensional shape of the vein is registered in advance, and a collating means, and the calculating means calculates the three-dimensional shape of the vein from the vein image data captured by the plurality of imaging means. A matching shape is obtained, collation means is collated with a three-dimensional shape of a vein registered in advance in a database, a correlation is determined, and a determination result is output.

  With the above configuration, even if the forged finger is a forged finger sandwiched between forged patterns, it is possible to perform highly accurate matching by checking the three-dimensional shape of the vein.

  The present invention also constitutes a personal authentication device or a personal authentication system that controls the operation of the electronic device using the determination result output from any one of the vein image matching devices.

  As a result, it is possible to provide a highly accurate personal authentication device or personal authentication system that can detect a forged finger with a forged pattern or a forged finger sandwiched between forged patterns.

  According to the present invention, it is possible to determine whether the object to be imaged by the vein image matching device is a real living body or a forged living body on which a forged pattern sheet depicting a forged pattern is attached. Can be emitted. In addition, when it is confirmed that the subject is a real living body, an effect that collation with high accuracy can be performed by collating the three-dimensional shape of the vein.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
The vein image collation apparatus according to the first embodiment calculates the three-dimensional position information of the vein pattern from the vein image data imaged using a plurality of image pickup means, and stores the three-dimensional position information of the vein pattern and the storage means in advance. The three-dimensional position information on the skin surface of the living body stored in the table is compared, and it is determined whether or not the vein pattern is located in the living body. And when the imaged vein pattern is located in the living body, the three-dimensional shape of the vein is obtained and collated with the three-dimensional shape of the vein registered in advance in the storage means. In the first embodiment, a vein image matching device that captures and collates finger veins will be described as an example. A vein image matching device that captures and collates facial veins will be described later as a third embodiment. To do.

  FIG. 1 shows a schematic configuration diagram of a personal authentication system using the vein image matching apparatus 100 according to the first embodiment of the present invention. The vein image collation apparatus 100 has a hole 9 into which a finger 8 is inserted in a substantially cubic housing 10, and the illumination means 5 is provided above the housing, and a plurality of imaging units are provided below the housing. 1 and the imaging unit 2 are provided adjacent to each other. 7 in the figure is a transparent guide plate for guiding a finger. A touch switch 6 is provided in the back of the housing. When the finger 8 is put into the housing 10, the switch is turned on when the finger is stretched and the fingertip touches the surface of the touch switch 6. Reference numeral 3 denotes a vein image matching device main body, which internally has calculation means (not shown) for calculating the three-dimensional position of the vein pattern from a plurality of vein image data captured by the imaging unit 1 and the imaging unit 2. . Reference numeral 4 denotes an electronic device connected to the vein image collation apparatus 100. In the first embodiment, the electronic apparatus is described as an entry / exit management apparatus that controls switching of unlocking / locking of a visitor's entry / exit door.

  When a visitor stretches out the finger 8 and puts it into the back along the guide plate 7 through the hole 9 of the vein image matching device 100 and touches the touch switch 6, the illumination means 5 is turned on and the finger 8 is irradiated with infrared light. To do. Infrared light emitted from the illumination means 5 is scattered inside the finger and then radiated to the outside. At this time, each of the imaging unit 1 and the imaging unit 2 images the vein pattern of the finger 8. Since the plurality of imaging units 1 and 2 have parallax, the three-dimensional position H1 of the vein pattern is calculated from the captured vein image data of both.

  When a vein image is taken, that is, when the finger is stretched and the fingertip touches the touch switch 6, the position of the skin, which is the lower surface of the finger, touches the position of the inner surface of the hole 9 where the base of the finger hits. It is determined almost uniquely from the position of the upper surface of the switch 6. Therefore, the positional relationship between the vein pattern and the skin can be confirmed from the relationship between the vein pattern position H1 of the finger 8 obtained by photographing the vein image and the finger skin position H2 immediately below the finger pattern.

  That is, if the determination result indicates that the vein pattern position H1 of the finger 8 is substantially the same as the skin position H2, the vein pattern is on the surface of the finger. In this case, the entry / exit management device 4 which is an electronic device is unlocked on the assumption that a biometric finger is not inserted into the vein image matching device and a forged finger with a forged pattern sheet is inserted by a malicious user. A control signal that issues a warning without operating is issued. As a result, it is possible to detect and warn that a forged finger with a forged pattern attached is inserted into the vein image matching device.

  On the other hand, if the position H1 of the vein pattern of the finger 8 is different from the position H2 of the skin and is clearly above H2, the vein is in the living finger. In this case, as the next step, the three-dimensional shape of the vein is obtained based on the vein image data captured by the imaging unit 1 and the imaging unit 2, and collated with the three-dimensional shape of the vein stored in advance in the storage unit. Then, if there is a correlation in the collation result, the entry / exit management device 4 which is an electronic device is unlocked, and if there is a correlation in the collation result, a control signal is output that the unlocking operation is not continued.

  Even though the forged finger is sandwiched between the forged pattern, it is difficult to produce a forged pattern that is forged in three dimensions, and to pinch it between the skin and the actual vein. Therefore, it is possible to detect a forgery pattern by checking the three-dimensional shape of the vein calculated from the vein image data captured by a plurality of imaging units with the three-dimensional shape of the vein stored in the database. it can.

  FIG. 2 shows a block diagram of a personal authentication system using the vein image matching apparatus 100 of the first embodiment. In FIG. 2, the internal configuration of the vein image matching apparatus main body 3 is described in detail. The vein image matching device main body 3 includes an image storage unit 31 that stores vein images captured by the imaging unit 1 and the imaging unit 2, respectively, and an image transmission unit 32 that sends the stored vein images to a vein feature amount extraction unit described later. A vein feature amount extraction unit 33 that extracts the position and shape of the vein from the vein image sent from the image sending unit 32 is provided. The vein feature amount extraction unit 33 functions as calculation means for calculating the three-dimensional position of the vein pattern and the three-dimensional shape of the vein. The vein image data captured by the imaging unit 1 and the imaging unit 2 is the vein feature amount extraction unit 33. The three-dimensional position of the vein pattern and the three-dimensional shape of the vein are calculated.

  The collation unit 34 is connected to a vein feature amount database 35 which is a storage means in which a three-dimensional shape of a biological vein is registered in advance. The vein feature database 35 is configured to be able to search by registering feature data for verification in advance. In addition, a storage unit 36 is connected to the verification unit 34. The storage means 36 stores in advance the value of the position H2 on the lower surface of the finger immediately below the position of the vein pattern for capturing the vein image.

  In this case, the collation unit 34 calculates the three-dimensional position H1 of the vein pattern calculated by the vein feature amount extraction unit 33 and the value of the position H2 of the lower surface of the finger stored in the storage unit 36 in advance. The description will be given on the assumption that it also serves as a comparison means for comparison. The matching unit 34 compares the three-dimensional positions H1 and H2 of the vein pattern to determine whether the vein pattern is in the living finger or on the surface of the finger. When the vein pattern is in the living finger, as a next step, the collation unit 34 reads and collates the three-dimensional shape of the vein from the vein feature amount database 35, and checks whether there is a correlation between the three-dimensional shape of the vein. judge. The collation unit 34 outputs the determination result from the determination result output unit 37 to the entrance / exit management device 4 that is an electronic device. If the output determination result is “matches the person who is permitted to unlock”, the entry / exit management device 4 unlocks the electric lock. If the output determination result is “does not match the person who permits unlocking”, the entry / exit management device 4 does not unlock the electric lock and displays a warning “voice cannot be unlocked” by voice or text. It is configured as follows.

  Next, the operation of the personal authentication system using the vein image collation apparatus 100 according to the first embodiment will be described with reference to a flowchart. FIG. 3 is a flowchart showing the operation of the personal authentication system of the first embodiment. When a visitor puts a finger into the hole 9 of the vein image matching apparatus main body 3 and touches the touch switch 6 with the fingertip, the operation of the vein image matching apparatus 100 starts. That is, the illumination means 5 is turned on and the finger 8 is irradiated with infrared light. The imaging unit 1 and the imaging unit 2 capture infrared light transmitted through the finger 8 and accumulate image data in the image accumulation unit 31. The image sending unit 32 sends the vein image accumulated in the image accumulation unit 31 to the vein feature amount extraction unit 33 (step S01). The vein feature amount extraction unit 33 calculates the three-dimensional position H1 of the vein pattern from the extracted vein image data of the imaging unit 1 and vein image data of the imaging unit 2 (step S02). Then, the value of the position H2 on the lower surface of the finger stored in advance in the storage means 36 is read and compared. If it is clear that the position H1 of the vein pattern of the finger 8 is above H2 unlike H2, it is determined that the vein pattern is in the living finger, and if H1 and H2 are approximately the same value, the vein pattern is It determines with it being on the surface of a finger | toe (step S03). If the three-dimensional position of the vein pattern is on the surface of the finger (NO in step S03), the fact that it is a forged finger is notified using the display means and alarm means of the entry / exit management device 4 (not shown) (step S04). This makes it possible to immediately warn against the use of a forged finger by a malicious user.

  When it is determined in step S03 that the three-dimensional position of the vein pattern is in the finger (YES in step S03), it is assumed that the biometric finger has been inserted into the vein image matching device 100, and the three-dimensional shape of the vein Calculate the shape. That is, among the vein image data of the imaging unit 1 and the vein image data of the imaging unit 2, the stereoscopic image data is calculated based on the data of the region where the imaging regions of the two overlap, in other words, the data of the stereoscopic image matching region ( Step S05). Then, the matching feature value data is read from the vein feature value database 35, and the matching unit 34 performs the matching process (step S06). As a result, when the correlation with the data registered with a high degree of coincidence is confirmed (YES in step S07), the determination result is output to the entry / exit management device 4 which is an electronic device, and the entry / exit management is performed. The electric lock of the device 4 is unlocked (step S08). When the degree of coincidence is low and the correlation with the registered data is not confirmed (NO in step S07), the determination result is output to the entry / exit management device 4. The electric lock of the entry / exit management device 4 is not unlocked. Further, as in step S04, the fact that the collation results do not match is displayed and a warning is given (step S09).

  As described above, according to the first embodiment of the present invention, a biological vein such as a biological finger is imaged by a plurality of imaging means, and it is confirmed whether or not the vein pattern is inside the biological body. When a person tries to make the vein image verification device mis-authenticate using a finger pattern that is pasted or drawn on the surface of a forged finger or on the surface of his / her finger, there must be a vein pattern on the surface of the forged finger Can be detected and alerted quickly. When it is confirmed that the vein pattern is inside the living body, the three-dimensional shape of the vein is obtained, and personal authentication is performed by collating with the three-dimensional shape of the vein registered in both vein feature databases. Therefore, even if the counterfeit finger is sandwiched between counterfeit patterns, collation with the three-dimensional shape of the veins can be performed with high accuracy.

(Embodiment 2)
In the first embodiment already described, when the vein pattern is confirmed to be inside the living body, the three-dimensional shape of the vein is collated. However, it takes time to collate the three-dimensional shape of the vein after confirming that the vein pattern is inside the living body with a plurality of imaging means. In addition, a vein feature database having a large storage capacity must be used.

  On the other hand, when making a forged finger with a counterfeit pattern sandwiched, it is difficult to produce a three-dimensional elaborate forged vein pattern, and at the same time, it is difficult to pinch it between the skin and the actual vein position. Therefore, focusing on the latter, even if the three-dimensional position of the vein is collated with the data stored in the database and the vein is collated with a planar shape, it can be said that a certain collation accuracy can be obtained.

  Therefore, in the second embodiment of the present invention, the three-dimensional position of the vein pattern and the planar shape of the vein imaged by one imaging means are used as the collation operation after confirming that the vein pattern is inside the living body. The collation operation is performed.

  The second embodiment of the present invention has a vein pattern on the surface of a forged finger when a malicious person affixes a transparent sheet depicting a forged pattern on the surface of the forged finger and inserts it into a vein image matching device. It is configured to be able to quickly detect and alert. In addition, even if a malicious person uses an opaque forged finger sandwiching a vein pattern, the three-dimensional position of the imaged vein pattern and the planar shape of the vein are registered in the database in advance. By comparing the three-dimensional position with the planar shape of the vein, it is possible to quickly detect and warn that a malicious person has used an opaque forged finger sandwiching the vein pattern.

  FIG. 4 is a flowchart showing the operation of the second embodiment of the present invention. Note that the configuration of each part of the personal authentication system using the vein matching apparatus according to the second embodiment is substantially the same as the configuration of each part according to the first embodiment, and therefore illustration and description of the block diagram are omitted.

  In FIG. 4, when a visitor puts a finger in the hole of the vein image matching device and touches the touch switch 6 with the fingertip, the operation of the vein image matching device starts (step S01). The three-dimensional position of the vein pattern, that is, the position H1 in the height direction of the vein pattern is calculated (step S02), and it is determined whether the vein pattern is in the finger (step S03). When it is determined that the vein pattern is in the finger (YES in step S03), the planar shape of the vein is obtained from the vein image captured by one imaging unit (step S15). Then, the three-dimensional position of the vein registered in advance in the database is collated with the planar shape of the planar vein (step S16). If the collation results match (YES in step S07), the entry / exit management device 4 releases the operation restriction of the connected electronic device such as unlocking the electric lock (step S08). If the verification results do not match (NO in step S07), a warning is issued without releasing the operation restriction of the connected electronic device, such as not opening the electric lock of the entry / exit management device 4 (step S09).

  As described above, according to the second embodiment of the present invention, it is confirmed that a vein pattern is inside a living body by imaging a finger vein with a plurality of imaging means, and a malicious person can forge a finger. Even if you try to make the vein image verification device mis-authenticate by pasting or drawing a vein pattern on the surface of your finger or on your finger surface, you can quickly detect that there is a vein pattern on the surface of the forged finger can do. In addition, since the three-dimensional position of the vein pattern and the planar shape of the vein are collated, even when a fake finger is inserted with an opaque material sandwiched like a sandwich, a mismatch can be quickly detected with a certain degree of accuracy. Can detect and alert. Therefore, compared with the case where the three-dimensional shape of the vein is calculated and collated with the data in the database, the amount of data in the database can be reduced, and the collation can be performed quickly.

(Embodiment 3)
In the vein image collation apparatus according to the first embodiment and the second embodiment, the embodiment has been described in which infrared light is irradiated onto a living body finger and transmitted light is imaged. In Embodiment 3 of the present invention, a high-sensitivity imaging unit is used for the imaging unit 1 and the imaging unit 2, and a near-infrared ray is irradiated onto a human face that is a living body to image a facial vein. . The configuration of each part of the personal authentication system using the vein matching apparatus according to the third embodiment is almost the same as the configuration of each part according to the first embodiment except that the number of imaging units is increased. The illustration and explanation are omitted.

  FIG. 5 is a plan view conceptually showing the positional relationship between the imaging means of the vein image matching apparatus according to the third embodiment and the face of the subject. In FIG. 5, four image pickup means are arranged. The imaging means 51 and 53 capture natural light images. The left imaging means 51 captures a photograph of the diagonally left side 62 of the face. The right imaging means 53 captures a photograph of the diagonally right side 64 of the face. The three-dimensional position H4 of the face surface is calculated by combining both images. The three-dimensional position H4 of the face surface is stored in the storage means 36. On the other hand, the imaging means 61 and 63 capture an image with near infrared rays. The left imaging unit 61 captures a near-infrared photograph of the diagonally left side 62 of the face. The right imaging means 63 captures a near-infrared photograph of the diagonally right side 64 of the face. The three-dimensional position H3 of the face vein is calculated by combining both images. And the value of H4 memorize | stored beforehand in the memory | storage means 36 is read, and both are compared. If the position H3 of the face vein pattern is different from the position H4 on the face surface and is clearly behind H4, it is determined that the vein pattern is in the living finger, and H3 and H4 should be approximately the same value. For example, it is determined that the vein pattern is on the face surface. If the three-dimensional position of the vein pattern is on the face surface, the fact that the vein pattern is drawn is informed using the display means and alarm means of the entrance / exit management device 4 (not shown). As a result, it is possible to immediately warn against use by a malicious user.

  When it is determined that the three-dimensional position of the vein pattern is behind the face, a three-dimensional image of one facial vein is created as shown in FIG. In FIG. 6, the eyes 65, the nose 66, the mouth 67, the eyebrows 68, the ears 69 and the like are light images and the veins 70 are dark images. This is collated with a stereoscopic image of a facial vein registered in the vein feature database in advance. If the results collated by the collating unit 34 match, the determination result indicating that they match is the same as in the first embodiment.

  According to the third embodiment of the present invention, even if a malicious person tries to pass the personal authentication of the entrance / exit management device 4 by wearing a mask on which a vein pattern is drawn, the vein pattern is located on the face surface. Judgment and warning can be made quickly. When it is confirmed that the vein pattern is in the living body, the vein pattern or the three-dimensional shape of the vein is further verified, so that there is an advantage that personal authentication can be performed with high accuracy. In particular, if the three-dimensional shape of the vein is checked, it is judged even when trying to pass through personal authentication by wearing a mask with a counterfeit pattern sheet on the inside of a semi-transparent and thick mask with low transparency. Can be warned.

  As shown in FIG. 6, it takes time to create a three-dimensional image of the veins of one entire face, and it also takes time to collate. The collation time of the vein image collation device should be short. Therefore, when the required security level is not high, the vein image of the face is obtained in a three-dimensional manner. You may make it collate a vein image.

  The vein image collation apparatus of the present invention and the personal authentication system using the same can confirm the vein pattern in the living body and perform collation processing. Therefore, it is possible to quickly find fraud using a forged finger that is pasted or drawn on a finger. Further, even when it is confirmed that the vein pattern is in the living body, collation with higher accuracy can be performed by collating the three-dimensional shape of the vein. Public institutions, corporate laboratories, financial institutions and other entry / exit management systems that are prone to fraudulent activities and require high accuracy for personal authentication, financial institution terminal devices, personal computer logon restrictions, mobile phones, The present invention can be applied to portable terminal devices such as portable information terminals and handy terminals, vein verification devices that restrict the use of other electronic devices, and personal authentication systems.

1 is a schematic configuration diagram of a personal authentication system according to a first embodiment of the present invention. Block diagram of the personal authentication system of Embodiment 1 of the present invention FIG. 3 is a flowchart of the personal authentication system according to the first embodiment of the present invention. Flow chart of personal authentication system of embodiment 2 of the present invention The top view which shows the positional relationship of the imaging means and biological body of the personal authentication system of Embodiment 3 of this invention The figure which shows the image of the vein of the face imaged with the personal authentication system of Embodiment 3 of this invention Sectional drawing which showed schematic structure of the conventional vein image collation apparatus The figure which shows the image imaged with the conventional vein image collation apparatus Sectional drawing which showed schematic structure of the conventional personal authentication system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Imaging part 3 Vein image collation apparatus main-body part 4 Entrance / exit management apparatus 5 Illumination means 6 Switch 31 Image storage part 32 Image transmission part 33 Vein feature-value extraction part 34 Collation part 35 Vein feature-value database 36 Determination result output part

Claims (6)

Illumination means for irradiating the living body with infrared light;
A plurality of imaging means for receiving and imaging infrared light applied to the living body;
Calculation means for calculating three-dimensional position information of the vein pattern from image data captured by the plurality of imaging means;
Storage means for storing three-dimensional position information on the skin surface of a living body that irradiates infrared light;
Comparison means for comparing the three-dimensional position information of the vein pattern and the three-dimensional position information of the skin surface of the living body,
Have
The calculation means calculates the three-dimensional position information of the vein pattern from the image information of the vein pattern imaged by the plurality of imaging means,
Whether the vein pattern is located in the living body by comparing the three-dimensional position information of the vein pattern stored in the storage means with the three-dimensional position information of the skin surface of the living body by the comparing means. And a vein image matching device configured to output a determination result. Illumination means for irradiating the living body with infrared light;
A plurality of imaging means for receiving and imaging infrared light applied to the living body;
Calculating means for calculating a three-dimensional shape of the vein from image data captured by the plurality of imaging means;
A database in which three-dimensional shapes of veins are registered in advance;
Matching means;
Have
The calculation means obtains the three-dimensional shape of the vein from the vein image data imaged by the plurality of imaging means,
A vein image collation apparatus configured such that the collation unit collates with a three-dimensional shape of a vein registered in advance in the database to determine a correlation, and outputs a determination result. Illumination means for irradiating the living body with infrared light;
A plurality of imaging means for receiving and imaging infrared light applied to the living body;
Calculation means for calculating the three-dimensional position information of the vein pattern and the three-dimensional shape of the vein from the image data captured by the plurality of imaging means;
A database in which three-dimensional shapes of veins are registered in advance;
Matching means;
Storage means for storing three-dimensional position information on the skin surface of a living body that irradiates infrared light;
Comparison means for comparing the three-dimensional position information of the vein pattern and the three-dimensional position information of the skin surface of the living body,
Have
The calculation means calculates the three-dimensional position information of the vein pattern from the image information of the vein pattern imaged by the plurality of imaging means,
Whether the vein pattern is located in the living body by comparing the three-dimensional position information of the vein pattern stored in the storage means with the three-dimensional position information of the skin surface of the living body by the comparing means. Determine
When the vein pattern is located in the living body, obtain the three-dimensional shape of the vein from the image data of the vein imaged by the plurality of imaging means,
A vein image collation apparatus configured such that the collation unit collates with a three-dimensional shape of a vein registered in advance in the database to determine a correlation, and outputs a determination result. Illumination means for irradiating the living body with infrared light;
A plurality of imaging means for receiving and imaging infrared light applied to the living body;
Calculating means for calculating the three-dimensional position information of the vein pattern from the image data captured by the plurality of imaging means;
A database in which one or more sets of vein data are registered in advance as a set of vein data with the three-dimensional position information of the vein pattern and the planar shape of the veins;
Matching means;
Storage means for storing the three-dimensional position information of the skin surface of the living body irradiated with infrared light;
Comparison means for comparing the three-dimensional position information of the vein pattern and the three-dimensional position information of the skin surface of the living body,
Have
The calculation means calculates the three-dimensional position information of the vein pattern from the image information of the vein pattern imaged by the plurality of imaging means,
Whether the vein pattern is located in the living body by comparing the three-dimensional position information of the vein pattern stored in the storage means with the three-dimensional position information of the skin surface of the living body by the comparing means. Determine
When the vein pattern is located in the living body, the collating unit is configured to obtain the three-dimensional position information of the vein pattern obtained from the images of the plurality of imaging units and the planar shape of the vein imaged by one imaging unit. Is collated with the three-dimensional position information of the vein pattern registered in the database in advance and the planar shape of the vein to determine the correlation and output the determination result. A personal authentication device configured to control the operation of an electronic device using the determination result output from the vein image matching device according to any one of claims 1 to 4. A personal authentication system configured to control the operation of an electronic device using the determination result output from the vein image matching device according to any one of claims 1 to 4.

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