JP2018147206A - Individual identification device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an individual identification device capable of more reducing an individual identification mistake than a conventional manner.SOLUTION: An individual identification device 100 comprises: an imaging device 20 for imaging the hand 50 of a user 90 from the outside; an extraction part 41 for extracting a feature point of the user 90 from an image photographed by the imaging device 20; a storage part 42 for storing the feature point extracted by the extraction part 41 for each individual; and an individual specification part 43 for specifying the user 90 by comparing the feature point extracted by the extraction part 41 with the feature point stored by the storage part 42. Also, the imaging device 20 comprises a first imaging device 21 for imaging the hand of the user 90 from the thumb side in a state in which the user clenches the fist.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a personal authentication device using biometric information, and more particularly to a personal authentication device designed to reduce personal authentication errors.

  Conventionally, personal authentication devices using biometric information have been proposed. As such a personal authentication device, for example, a personal authentication device using a fingerprint is known (see, for example, Patent Document 1).

  In the conventional personal authentication device using a fingerprint, when the user presses the finger pad against the detection unit, the detection unit detects the fingerprint information of the user. The fingerprint information is a fingerprint image or the like. In addition, a conventional personal authentication device using a fingerprint extracts feature points from detected fingerprint information. The feature point is, for example, the shape of a characteristic portion showing a characteristic shape in a fingerprint and position information of the characteristic portion. For example, the extraction unit divides the fingerprint image into a grid pattern (grid shape), detects in which region the characteristic location exists, and extracts the positional information of the characteristic location. The extracted feature points are stored in the storage unit for each individual. That is, when the user is Mr. A, the storage unit stores the extracted feature points as Mr. A's personal information.

  A conventional personal authentication device using a fingerprint includes a personal identification unit that compares a feature point extracted by an extraction unit with a feature point stored in a storage unit to identify a user. Specifically, the individual specifying unit searches the personal information stored in the storage unit for items that match the feature points extracted by the extraction unit (in other words, items that exceed a predetermined similarity). When the personal identification unit finds such personal information, it identifies that the user is an individual having the personal information. For example, when the feature point extracted by the extraction unit matches the personal information of Mr. A stored in the storage unit, the individual specifying unit specifies that the user is Mr. A.

Japanese Patent Application Laid-Open No. 07-029003

In order to use the position information of the characteristic part as information that can be used to identify an individual, it is necessary to divide fingerprint information such as a fingerprint image into a number of areas (cells). However, since the fingerprint detection range is small, each of the divided areas becomes smaller and smaller. For this reason, even when the person is the same person, when the fingerprint information is detected by the detection unit and the position information of the characteristic part is extracted by the extraction unit, the position information is different from the position information stored in the storage unit There is. In such a case, the individual specifying unit cannot specify who the user is, and an authentication error occurs. That is, when Mr. A detects fingerprint information at the detection unit and extracts feature points at the extraction unit, the individual identification unit cannot identify the user as Mr. A. Further, the pressure when the user presses the finger pad against the detection unit is likely to change every time. And if the pressure when pressing a finger pad against a detection part differs, the position of a characteristic location will also differ. For this reason, an authentication error also occurs due to pressure fluctuation when the finger pad is pressed against the detection unit.
Therefore, the conventional personal authentication device using a fingerprint has a problem that there are many personal authentication errors.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a personal authentication device that can reduce personal authentication errors more than ever.

  The personal authentication device according to the present invention includes a photographing device that photographs a user's hand from the outside, an extraction unit that extracts a feature point of the user from an image photographed by the photographing device, and a feature that is extracted by the extraction unit. A storage unit that stores points for each individual, a feature point extracted by the extraction unit, and a feature point stored in the storage unit, and a personal identification unit that identifies a user, The photographing apparatus includes a first photographing apparatus that photographs a user's hand from the thumb side in a state where the user is holding a fist.

  The personal authentication device according to the present invention takes a picture of the user's hand from the thumb side while the user is holding the fist. The personal authentication device according to the present invention extracts feature points from the image of the hand holding the fist. For example, the personal authentication device according to the present invention has, as characteristic points, the shape and position of a wrinkle formed on a finger joint, the shape and position of a wrinkle formed between a thumb and an index finger, the position of a finger joint, and the position of a fingertip. Extract at least one of the positions. Here, the image of the hand holding the fist, which is the feature point extraction range of the personal authentication device according to the present invention, is larger than the fingerprint detection range. For this reason, when the image of a hand holding a fist is divided into the same number as that when a conventional personal authentication device using fingerprints divides the fingerprint detection range, each of the divided areas is larger. This can be made larger than in the case of a conventional personal authentication device using a fingerprint. Further, the strength with which a human holds a fist is almost the same strength every time. For this reason, the feature points that can be made in the hand holding the fist are approximately the same position each time. For this reason, the personal authentication device according to the present invention can suppress the positions of the feature points from being different for each extraction, and can reduce personal authentication errors more than in the past.

It is the schematic which shows the personal authentication apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the image image | photographed with the 1st imaging device of the personal authentication apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows another example of the image image | photographed with the 1st imaging device of the personal authentication apparatus which concerns on Embodiment 1 of this invention. It is the schematic which shows another example of the personal authentication apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the image image | photographed with the 2nd imaging device of the personal authentication apparatus shown in FIG. It is the schematic which shows the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the image image | photographed with the 1st imaging device of the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the grip of the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is a perspective view which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 2 of this invention. It is the schematic which shows the personal authentication apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the grip of the personal authentication apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows the fingerprint image detected by the detection part of the personal authentication apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows another example of the grip of the personal authentication apparatus which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing a personal authentication device according to Embodiment 1 of the present invention.
The personal authentication device 100 according to the first embodiment includes a photographing device 20 and a control device 40. The photographing device 20 is, for example, a camera or a scanner, and photographs the hand 50 of the user 90 in a state of holding a fist from the outside. Specifically, the personal authentication device 100 according to the first embodiment is the first imaging device 21 that photographs the hand 50 of the user 90 from the thumb side as the imaging device 20 in a state where the user 90 is holding a fist. have. For example, the first photographing device 21 is attached to the lower part of the upper wall of the box 1 in which the user 90 inserts the hand 50 so as to photograph the lower part. Note that an opening is formed on one side surface of the box 1, and the user 90 inserts the hand 50 into the box 1 from the opening. That is, the first photographing device 21 photographs the hand 50 of the user 90 in the box 1 from above. Thereby, when the 1st imaging device 21 image | photographs the user's 90 hand 50, the influence of disturbance light can be suppressed.

  The control device 40 performs personal authentication based on the image photographed by the photographing device 20. The control device 40 is configured with dedicated hardware or a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, processor) that executes a program stored in a memory. .

  When the control device 40 is dedicated hardware, the control device 40 may be, for example, a single circuit, a composite circuit, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination of these. Applicable. Each functional unit realized by the control device 40 may be realized by individual hardware, or each functional unit may be realized by one piece of hardware.

  When the control device 40 is a CPU, each function executed by the control device 40 is realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and stored in a memory. The CPU implements each function of the control device 40 by reading and executing a program stored in the memory. Here, the memory is a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM.

  Note that a part of the functions of the control device 40 may be realized by dedicated hardware, and a part may be realized by software or firmware.

  The control device 40 according to the first embodiment includes an extraction unit 41, a storage unit 42, and an individual identification unit 43 as functional units. The extraction unit 41 extracts the feature point of the user 90 from the image photographed by the photographing device 20. The storage unit 42 stores the feature points extracted by the extraction unit 41 for each individual. The personal identification unit 43 compares the feature points extracted by the extraction unit 41 with the feature points stored in the storage unit 42 and identifies the user 90 (identifies who the user 90 is) It is.

  Moreover, the personal authentication device 100 according to the first embodiment uses the battery 45 as a power source. Of the configurations of the personal authentication device 100, configurations that operate when supplied with power (the control device 40, the imaging device 20, etc.) are supplied with power from the battery 45. That is, the personal authentication device 100 is not connected to a commercial power source. In recent years, when a PC (personal computer) or the like is connected to a commercial power source, there has been a case where hacking occurs via the power supply wiring of the commercial power source. Since personal authentication device 100 according to the first embodiment uses battery 45 as a power source, such hacking can be prevented and security can be improved.

  Next, the operation of the personal authentication device 100 configured as described above will be described.

[Memory operation]
In order to perform personal authentication, first, it is necessary to store individual feature points in the storage unit 42. For this reason, when the user 90 uses the personal authentication device 100 for the first time, the feature points of the user 90 are stored in the storage unit 42 as follows.

FIG. 2 is a diagram showing an image photographed by the first photographing device of the personal authentication device according to the first embodiment of the present invention.
The user 90 inserts the hand 50 into the box 1 through an opening formed on one side surface of the box 1 and grasps the fist. At this time, the user 90 holds the fist so that the thumb 51 faces the first imaging device 21 side, that is, the thumb 51 is on the upper side. In other words, the user 90 holds the fist so that the little finger is on the lower side. And the 1st imaging device 21 image | photographs the user's 90 hand 50 in the state hold | gripped the fist in this way. Thereby, the image shown in FIG. 2 is obtained.

  The extraction unit 41 extracts feature points 61 from the image of the fist of the user 90 photographed by the first photographing device 21. The feature point 61 is, for example, at least one of the shape and position of a wrinkle formed at a finger joint, the shape and position of a wrinkle 62 formed between the thumb 51 and the index finger 52, the position of a finger joint, and the position of a fingertip. It is. The wrinkles that can be formed on the finger joint include, for example, a wrinkle 63 that can be the first joint of the index finger 52, a wrinkle 64 that can be the second joint of the index finger 52, and a wrinkle 65 that can be the third joint of the index finger 52. The position of the finger joint is the protruding position of the finger joint, for example, the convex portion 66 of the first joint of the thumb 51, the convex portion 67 of the second joint of the index finger 52, and the convex portion of the third joint of the index finger 52. Part 68 and the like. Note that the feature point 61 described above is merely an example.

  Further, the extraction unit 41 extracts the position of the feature point 61 as follows. Specifically, as illustrated in FIG. 2, the extraction unit 41 divides the image of the fist of the user 90 photographed by the first photographing device 21 into a grid pattern (grid shape). Then, the extraction unit 41 detects in which region (square) the feature point 61 exists, and extracts position information of the feature point 61. If necessary, the position and angle of the fist in the image may be corrected as appropriate using a known technique. For example, the position of the fist in the image may be corrected by moving the first reference point (for example, the convex portion 68 of the third joint of the index finger 52), which is one location in the fist, to the center position of the coordinates. Then, even if the angle of the fist in the image is corrected so that a straight line connecting the first reference point and the second reference point (for example, the convex portion 67 of the second joint of the index finger 52) coincides with the reference line. Good. Further, for example, the outer shape of the fist in the image may be extracted, and the position and angle of the fist in the image may be matched so that the extracted outer shape substantially matches the outer shape of the model fist. Thus, by correcting the position and angle of the fist in the image, the position of the feature point 61 can be detected more stably.

  Finally, the storage unit 42 stores the feature points 61 extracted by the extraction unit 41 as the feature points 61 of the user 90. For example, when the user 90 is Mr. A, the storage unit 42 stores the feature points 61 extracted by the extraction unit 41 as Mr. A's personal information.

[Personal authentication operation]
When performing personal authentication, the user 90 inserts the hand 50 into the box 1 from the opening formed on one side surface of the box 1 and holds the fist, similarly to the above-described storage operation. Further, the first photographing device 21 photographs the hand 50 of the user 90 in a state where the fist is grasped, similarly to the above-described storage operation. In addition, the extraction unit 41 extracts the feature point 61 from the image of the fist of the user 90 photographed by the first photographing device 21 as in the storage operation. At this time, the extraction unit 41 may appropriately correct the position and angle of the fist in the image using a known technique, if necessary, as in the case of the storage operation.

  The personal identification unit 43 compares the feature points 61 extracted by the extraction unit 41 with the feature points 61 stored in the storage unit 42 and identifies who the user 90 is. Specifically, the personal identification unit 43 matches the feature points 61 extracted by the extraction unit 41 from the personal information stored in the storage unit 42 (in other words, exceeds the predetermined similarity). Search for. When the personal identification unit 43 finds such personal information, it identifies that the user 90 is an individual having the personal information. For example, when the feature point 61 extracted by the extraction unit 41 matches the personal information of Mr. A stored in the storage unit 42, the individual specifying unit 43 specifies that the user 90 is Mr. A. In addition, for example, when the feature point 61 extracted by the extraction unit 41 does not match any personal information stored in the storage unit 42, the individual specifying unit 43 stores the feature point 61 in the storage unit 42. A person who is not registered (in other words, a person who is not registered in the personal authentication device 100).

  Here, the image of the hand 50 in the state of holding the fist, which is the extraction range of the feature point 61 of the personal authentication device 100, is larger than the fingerprint detection range. For this reason, when the image of the hand 50 in the state of holding the fist is divided into the same number as when the conventional personal authentication device using fingerprints divides the fingerprint detection range, The size can be made larger than in the case of a conventional personal authentication device using a fingerprint. Further, the strength with which a human holds a fist is almost the same strength every time. For this reason, the feature point 61 that can be made on the hand 50 in the state of gripping the fist is approximately the same position every time. For this reason, the personal authentication device 100 according to the first embodiment can suppress the position of the feature point 61 from being different for each extraction, and can reduce personal authentication mistakes compared to the conventional case.

  Note that when the fist is gripped, the position of the thumb 51 is likely to be different for each user 90. For example, a certain user 90 may place the thumb 51 above the index finger 52 (on the first imaging device 21 side). A user 90 may place the thumb 51 in contact with the nail of the index finger 52. A user 90 may place the thumb 51 in contact with the nail of the middle finger. For this reason, when it is desired to unify the positions of the thumbs 51 of all the users 90 when extracting the feature points 61, the personal authentication device 100 indicates the position of the thumbs 51 when holding a fist by voice or video. An instruction unit (announcement unit) may be provided.

FIG. 3 is a diagram showing another example of an image photographed by the first photographing device of the personal authentication device according to Embodiment 1 of the present invention.
Further, when it is desired to unify the positions of the thumbs 51 of all the users 90 when extracting the feature points 61, the user 90 holds the fist as shown in FIG. May be. That is, the first photographing device 21 photographs the hand 50 of the user 90 holding the fist by bringing the finger pad 51b of the terminal node 51a of the thumb 51 into contact with the finger pad 52b of the terminal node 52a of the index finger 52. Also good.

FIG. 4 is a schematic diagram showing another example of the personal authentication device according to Embodiment 1 of the present invention. FIG. 5 is a diagram showing an image photographed by the second photographing device of the personal authentication device shown in FIG.
As illustrated in FIG. 4, the personal authentication device 100 may include a second imaging device 22 as the imaging device 20 in addition to the configuration of the personal authentication device 100 illustrated in FIG. 1. As shown in FIG. 5, the second photographing device 22 photographs the hand 50 of the user 90 from the side facing the index finger 52, the middle finger 53, the ring finger 54, and the little finger 55 in a state where the user 90 holds the fist. To do. In other words, the second photographing device 22 photographs the hand 50 of the user 90 in the box 1 from the side. Thereby, the extraction part 41 can extract the feature point of the user 90 also from the image image | photographed with the 2nd imaging device 22. FIG. For this reason, more feature points 61, which are information for specifying an individual, can be extracted, and security at the time of personal authentication can be improved.

Embodiment 2. FIG.
When the imaging device 20 captures the hand 50 of the user 90, the user 90 may hold the fist by holding the cylindrical grip by the user 90. In the second embodiment, items that are not particularly described are the same as those in the first embodiment, and the same functions and configurations are described using the same reference numerals.

FIG. 6 is a schematic diagram showing a personal authentication apparatus according to Embodiment 2 of the present invention. FIG. 7 is a diagram showing an image photographed by the first photographing device of the personal authentication device according to the second embodiment of the present invention.
The personal authentication device 100 according to the second embodiment includes a cylindrical grip 10. When the imaging device 20 captures the hand of the user 90, the user 90 grips the fist so that the user 90 grips the fist. The cross-sectional shape perpendicular to the axial direction of the grip 10 (the cross-sectional shape in FIG. 6) is not particularly limited as long as it is a shape that the user 90 can easily grip, and is substantially elliptical, substantially oval, It can be an oval shape or the like.

  Even if the personal authentication device 100 is configured as described above, as in the first embodiment, the image of the hand 50 in the state of holding the fist, which is the extraction range of the feature point 61 of the personal authentication device 100, is the fingerprint detection range. Bigger than. For this reason, when the image of the hand 50 in the state of holding the fist is divided into the same number as when the conventional personal authentication device using fingerprints divides the fingerprint detection range, The size can be made larger than in the case of a conventional personal authentication device using a fingerprint. Further, the strength with which the human grips the grip 10 is substantially the same every time. For this reason, the feature point 61 which can be made to the hand 50 in the state which is holding the grip 10 becomes a substantially the same position every time. For this reason, also in the personal authentication device 100 according to the second embodiment, as in the first embodiment, the position of the feature point 61 can be suppressed from being different for each extraction, and personal authentication errors can be reduced as compared with the conventional one. be able to.

  Further, in the personal authentication device 100 according to the second embodiment, the user 90 grips the fist when the user 90 grips the grip 10. That is, in the personal authentication device 100 according to the second embodiment, when photographing the fist of the user 90 with the first photographing device 21, the position of the fist is always the same position. For this reason, in the personal authentication device 100 according to the second embodiment, when the feature point 61 is extracted by the extraction unit 41 from the fist image of the user 90 photographed by the first photographing device 21, the fist in the image is displayed. There is no need to correct the position. Therefore, the personal authentication device 100 according to the second embodiment can simplify the control of the personal authentication device 100 as compared with the first embodiment.

  Further, in the personal authentication device 100 according to the second embodiment using the grip 10, the security of the personal authentication device 100 can be improved. Specifically, the shape and position of the feature point 61 that can be formed on the hand 50 when the grip 10 is gripped differ depending on the shape of the grip 10. Therefore, in order to impersonate Mr. A, Mr. B tries to make a dummy (replica) of Mr. A's hand 50. If a grip having the same shape as the grip 10 is not prepared, the dummy of Mr. A's hand 50 is It cannot be made. For this reason, in personal authentication device 100 using grip 10 according to the second embodiment, Mr. B can be prevented from impersonating Mr. A, and security can be improved.

  When the personal authentication device 100 includes the grip 10, as shown in FIG. 7, in the grip 10, the finger pad 51b of the distal end 51a of the thumb 51 is in contact with the upper end 10a, and fingers other than the thumb 51 are on the side surface 10b. It is good also as a structure grasped by the user 90 so that it may contact. When extracting the feature points, the positions of the thumbs 51 of all the users 90 can be unified. Here, the upper end portion 10a corresponds to the first end portion of the present invention.

  When the personal authentication device 100 includes the grip 10, the grip 10 may be provided with a stopper as shown below, for example.

  FIG. 8 is a diagram illustrating an example of a grip of the personal authentication device according to the second embodiment of the present invention. FIG. 8A is a perspective view of the grip 10. FIG. 8B is a side view showing the vicinity of the upper end portion 10 a of the grip 10. FIG. 8C is a side view showing a state where the hand 50 of the user 90 holds the grip 10.

  As shown in FIG. 8, the grip 10 includes a first stopper 11 that protrudes upward from the upper end portion 10a, for example. The first stopper 11 is hooked on the first joint 51 c of the thumb 51 when the user 90 grips the grip 10. For this reason, the first stopper 11 has a cross-sectional shape with a sharp tip at an acute angle so that the first stopper 11 is easily caught by the first joint 51 c of the thumb 51. By configuring the grip 10 in this manner, the first stopper 11 is caught by the first joint 51 c of the thumb 51 when the user 90 grips the grip 10. That is, every time the user 90 grips the grip 10, the position of the terminal joint 51 a of the thumb 51 is fixed to the grip 10 at the substantially same position. For this reason, each time the user 90 grips the grip 10 with the first stopper 11 hooked on the first joint 51c of the thumb 51, the finger and the joint of each finger are necessarily in substantially the same position.

  For this reason, the feature point 61 that can be made in the hand 50 each time the user 90 grips the grip 10 is more stable in shape and position (same), and the accuracy of personal authentication can be further improved. In addition, when the extraction unit 41 extracts the feature point 61 from the fist image of the user 90 photographed by the first photographing device 21, it is not necessary to correct the fist angle in the image. In addition, when the extraction unit 41 extracts the feature point 61 from the image of the user 90's fist captured by the second imaging device 22, it is not necessary to correct the lateral position of the fist in the image. Therefore, by configuring the grip 10 as shown in FIG. 8, the control of the personal authentication device 100 can be further simplified as compared with the first embodiment. The finger pad 51b of the end node 51a of the thumb 51 securely contacts (is prevented from floating) the upper end portion 10a, and the position of the end node 52a of the thumb 51 is reliably fixed so as to protrude from the upper end portion 10a of the grip 10. The height of the first stopper 11 is preferably 1.5 mm to 3 mm.

  FIG. 9 is a diagram illustrating another example of the grip of the personal authentication device according to the second embodiment of the present invention. FIG. 9A is a perspective view of the grip 10. FIG. 9B is a cross-sectional view in which the vicinity of the index finger 52 is cut in the horizontal direction in the state where the hand 50 of the user 90 grips the grip 10.

  The grip 10 shown in FIG. 9 includes a second stopper 12 in addition to the first stopper 11 shown in FIG. The second stopper 12 protrudes from the side surface portion 10b so as to extend in the axial direction of the grip 10 (vertical direction in FIG. 9A). The second stopper 12 is hooked to at least one second joint of the finger that contacts the side surface portion 10b when the user 90 grips the grip 10. For this reason, the second stopper 12 has a cross-sectional shape in which the tip end portion is sharpened so that the second stopper 12 is easily caught by the second joint of the finger that contacts the side surface portion 10b. FIG. 9B shows a state where the second stopper 12 is hooked on the second joint 52 c of the index finger 52.

  By providing the grip 10 with the second stopper 12 in this way, the position of the finger in contact with the side surface portion 10b of the grip 10 in the circumferential direction of the grip 10 can be more reliably fixed. For this reason, whenever the user 90 grasps the grip 10, the position shift of the finger | toe which contacts the side part 10b of the grip 10 in the circumferential direction of the grip 10 can be suppressed more. That is, it is possible to further suppress the shape and displacement of the feature point 61 that can be made on the hand 50 every time the user 90 grips the grip 10, and to further improve the accuracy of personal authentication. In order to securely fix the finger contacting the side surface portion 10b of the grip 10 so that the finger contacts the side surface portion 10b (so as not to float) and to securely fix the position of the finger contacting the side surface portion 10b, the side surface portion of the grip 10 is used. The height of the second stopper 12 protruding from 10b is preferably 3 mm to 5 mm.

  FIG. 10 is a diagram showing still another example of the grip of the personal authentication device according to the second embodiment of the present invention. FIG. 10A is a perspective view of the grip 10. FIG. 10B is a plan view of the grip 10. FIG. 10C is a side view showing a state in which the hand 50 of the user 90 holds the grip 10.

  The grip 10 shown in FIG. 10 includes a third stopper 13 in addition to the first stopper 11 shown in FIG. In FIG. 10, the grip 10 is also provided with the second stopper 12 shown in FIG. The third stopper 13 protrudes from the side surface portion 10b so as to extend in the circumferential direction of the grip 10, for example. The third stopper 13 comes into contact with at least one side portion of the finger that comes into contact with the side surface portion 10b when the user 90 grips the grip 10. In FIG. 10C, the lower side of the index finger 52 is in contact.

  As described above, by providing the grip 10 with the third stopper 13, the position of the finger in contact with the side surface portion 10 b of the grip 10 in the axial direction of the grip 10 can be more reliably fixed. For this reason, it is possible to further suppress the displacement of the finger in contact with the side surface portion 10b of the grip 10 in the axial direction of the grip 10 that occurs every time the user 90 grips the grip 10. That is, it is possible to further suppress the shape and displacement of the feature point 61 that can be made on the hand 50 every time the user 90 grips the grip 10, and to further improve the accuracy of personal authentication. In addition, when the extraction unit 41 extracts the feature point 61 from the image of the user 90's fist photographed by the second photographing device 22, it is not necessary to correct the vertical position of the fist in the image. Therefore, by configuring the grip 10 as shown in FIG. 10, the control of the personal authentication device 100 can be further simplified as compared with the first embodiment.

  In order to securely fix the position of the finger in contact with the side surface portion 10b, the height of the third stopper 13 protruding from the side surface portion 10b of the grip 10 is preferably 7 mm or more. On the other hand, if the third stopper 13 is too high, the third stopper 13 protrudes from the finger when the first photographing device 21 photographs the fist of the user 90. For this reason, in order to prevent the third stopper 13 from protruding from the finger when the fist of the user 90 is photographed by the first photographing device 21, the third stopper 13 protruding from the side surface portion 10b of the grip 10 is used. The height is preferably 10 mm or less.

  FIG. 11 is a diagram showing still another example of the grip of the personal authentication device according to the second embodiment of the present invention. FIG. 11A is a perspective view of the grip 10. FIG. 11B is a plan view of the grip 10. FIG. 11C is a plan view showing a state in which the user 90 places the finger pad 51b of the terminal joint 51a of the thumb 51 on the upper end portion 10a of the grip 10. FIG.

  The grip 10 shown in FIG. 11 includes a fourth stopper 14 in addition to the first stopper 11 shown in FIG. The fourth stopper 14 protrudes upward from the upper end portion 10a, for example. Further, the fourth stopper 14 is located at a position facing both side portions of the end node 51a of the thumb 51 when the user 90 grips the grip 10 so that the finger pad 51b of the end node 51a of the thumb 51 contacts the upper end portion 10a. Is provided.

  Thus, by providing the grip 10 with the fourth stopper 14, the position of the terminal joint 51 a of the thumb 51 can be more reliably fixed. For this reason, it is possible to further suppress the positional deviation of the distal end 51a of the thumb 51, which occurs every time the user 90 grips the grip 10. That is, it is possible to further suppress the shape and displacement of the feature point 61 that can be made on the hand 50 every time the user 90 grips the grip 10, and to further improve the accuracy of personal authentication.

FIG. 12 is a perspective view showing still another example of the grip of the personal authentication device according to Embodiment 2 of the present invention.
The grip 10 shown in FIG. 12 includes a biosensor 2 that detects sweat or the like at a position where the user 90 contacts the hand 50 when the grip 90 is gripped. For example, suppose that Mr. B cuts Mr. A's hand 50 and causes the hand 50 to grip the grip 10. In this case, if the grip 10 does not include the biometric sensor 2, Mr. B can make the personal authentication device 100 think that he is Mr. A. That is, Mr. B can impersonate Mr. A. On the other hand, when the grip 10 includes the biological sensor 2, it is possible to detect whether the hand holding the grip 10 is the surviving human hand 50. Therefore, when the grip 10 includes the biometric sensor 2, even if Mr. B cuts Mr. A's hand 50 and causes the hand 50 to grip the grip 10, Mr. You can prevent it from appearing to be. That is, Mr. B can be prevented from impersonating Mr. A. For this reason, the security of the personal authentication device 100 can be improved.

  The second stopper 12 to the fourth stopper 14 and the biosensor 2 described above may be provided alone in the grip 10, and a plurality (for example, all) of them may be provided in the grip 10. .

Embodiment 3 FIG.
In the first embodiment and the second embodiment, the personal authentication is performed by the method using the image of the hand 50 of the user 90 in the state of holding the fist. The security of personal authentication can be improved by using a personal authentication method different from the method in combination. In particular, when the grip 10 shown in the second embodiment is provided with the first stopper 11, by providing the grip 10 with a detection unit that detects the fingerprint information of the user 90, the security of personal authentication is as follows. It can also be improved. In Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or Embodiment 2, and the same functions and configurations are described using the same reference numerals.

  FIG. 13 is a schematic diagram showing a personal authentication apparatus according to Embodiment 3 of the present invention. Moreover, FIG. 14 is a figure which shows an example of the grip of the personal authentication apparatus which concerns on Embodiment 3 of this invention. Note that FIG. 14A is a perspective view of the grip 10. FIG. 14B is a side view showing the vicinity of the upper end portion 10 a of the grip 10. FIG. 14C is a side view showing a state where the hand 50 of the user 90 holds the grip 10.

  The grip 10 of the personal authentication device 100 according to the third embodiment includes the first stopper 11 at the upper end portion 10a and includes a detection unit 30 that detects fingerprint information of the user 90. Although at least one detection unit 30 provided in the grip 10 is sufficient, in the third embodiment, as the detection unit 30, an end side detection unit 31 provided in the upper end portion 10a of the grip 10 and the grip 10 are provided. And a side surface side detection unit 32 provided on the side surface portion 10b. The end side detection unit 31 detects fingerprint information (such as a fingerprint image) of the finger pad 51 b of the terminal node 51 a of the thumb 51. The side surface side detection unit 32 detects fingerprint information (such as a fingerprint image) of a finger that is in contact with the side surface portion 10 b of the grip 10. In the third embodiment, the side surface side detection unit 32 is provided at a position facing the terminal node 52 a of the index finger 52 and detects fingerprint information on the finger pad 52 b of the terminal node 52 a of the index finger 52. Further, the extraction unit 41 of the personal authentication device 100 according to the third embodiment extracts feature points from the fingerprint information detected by the detection unit 30 and uses the feature points for personal authentication. Note that a plurality of side surface side detection units 32 may be provided, and fingerprint information may be detected from a plurality of fingers that are in contact with the side surface portion 10 b of the grip 10.

  The detection unit 30 used for detecting fingerprint information (such as a fingerprint image) is not particularly limited, and various known detection units can be used. Also, the feature point extraction method of the extraction unit 41 is not particularly limited, and various known feature point extraction methods can be used. For example, the extraction unit 41 extracts, as feature points, the shape of a feature location that shows a characteristic shape in the fingerprint and the position information of the feature location. Further, for example, the extraction unit 41 divides the fingerprint image into a grid pattern (grid shape), detects in which region the characteristic location exists, and extracts the positional information of the characteristic location. The method of personal authentication using the feature points extracted by the extraction unit 41 (the operation of the storage unit 42 and the personal identification unit 43) is the same as described above.

  As described above, each time the user 90 grips the grip 10 with the first stopper 11 hooked to the first joint 51c of the thumb 51, the fingers and the joints of the fingers are in substantially the same position. For this reason, the position shift of the finger pad 51b of the terminal node 51a of the thumb 51 with respect to the end side detection unit 31, which occurs every time the user 90 grips the grip 10, can be suppressed. Moreover, the position shift of the finger pad 52b of the terminal node 52a of the index finger 52 with respect to the side surface side detection unit 32, which occurs every time the user 90 grips the grip 10, can be suppressed. That is, it is possible to suppress the positional deviation of the feature points in the fingerprint that occurs each time the user 90 grips the grip 10. In addition, as described above, the strength with which a human grips the grip 10 is substantially the same every time. For this reason, as in the third embodiment, by providing the grip 10 with the detection unit 30 that detects fingerprint information, it is possible to suppress the positional deviation of the feature points due to pressure fluctuation when the finger pad is pressed against the detection unit 30. . Therefore, also in the personal authentication device 100 according to the third embodiment, it is possible to reduce personal authentication mistakes compared to the conventional case.

  Here, in recent years, a technique for producing a fingerprint dummy (duplication) has been improved. For this reason, in the conventional personal authentication device that performs personal authentication using fingerprint information, when Mr. B pastes a dummy of Mr. A's fingerprint on the finger pad and performs personal authentication with the conventional personal authentication device, Will recognize Mr. B as Mr. A. That is, Mr. B can impersonate Mr. A. On the other hand, the personal authentication device 100 according to the third embodiment can prevent such impersonation as follows, and can improve the security of the personal authentication device 100.

  FIG. 15 is a diagram showing a fingerprint image detected by the detection unit of the personal authentication device according to the third embodiment of the present invention. FIG. 15 is a fingerprint image detected by any one of the detection units 30 (the end side detection unit 31 or the side surface side detection unit 32). FIG. 15A shows a fingerprint image when Mr. A uses the personal authentication device 100. FIG. 15B is a fingerprint image when Mr. B uses a personal identification device 100 with Mr. A's fingerprint dummy attached to his finger pad.

  When the user 90 grips the grip 10 in a state where the first stopper 11 is hooked on the first joint 51c of the thumb 51, if the user 90 is the same person, each finger and each finger joint are approximately each time. It becomes the same position. On the other hand, when the user 90 is a different person, the position of each finger and the joint of each finger is different for each user 90. This is because the size of the hand 50 (the size of the palm, the length of each phalanx) is different for each user 90. That is, as shown in FIG. 15, when Mr. A grips the grip 10 and when Mr. B grips the grip 10, fingerprint information is detected within the fingerprint information detection range in the detection unit 30. The range is different.

  Therefore, as can be seen from FIGS. 15 (a) and 15 (b), when Mr. B affixed Mr. A's fingerprint dummy to his finger pad and grips the grip 10, A fingerprint 60 having the same shape as that when the grip 10 is gripped is detected. However, as can be seen from FIGS. 15A and 15B, when Mr. B applies a dummy of Mr. A's fingerprint to his finger pad and grips the grip 10, the fingerprint 60 detected by the detection unit 30 is detected. The position of the feature point 60a (that is, the position of the feature point 60a extracted by the extraction unit 41) is different from the case where Mr. A grips the grip 10. This is because Mr. A and Mr. B have different hand sizes. Therefore, in personal authentication device 100 according to the third embodiment, even if Mr. B sticks Mr. A's fingerprint dummy to his finger pad and grips grip 10, the user is not able to recognize the difference in position of feature point 60 a. It can be recognized that 90 is not Mr. A. That is, in personal authentication device 100 according to the third embodiment, Mr. B can prevent Mr. B from impersonating Mr. A even if Mr. B attaches the dummy of Mr. A's fingerprint to his finger pad and grips grip 10. . Therefore, the personal authentication device 100 according to Embodiment 3 can improve security.

  In the third embodiment, the detection unit 30 detects the fingerprint information. However, the detection unit 30 may detect the blood vessel shape information of the hand 50. At this time, the detection unit 30 used for detecting the blood vessel shape information is not particularly limited, and various known detection units can be used. Also, the feature point extraction method of the extraction unit 41 is not particularly limited, and various known feature point extraction methods can be used. Even when the detection unit 30 for detecting blood vessel shape information is provided in the grip 10, personal authentication errors can be reduced as compared with the conventional case. When the user 90 grips the grip 10 with the first stopper 11 hooked on the first joint 51c of the thumb 51, each finger and the joint of each finger are in approximately the same position each time, and the feature in the blood vessel shape information This is because the point displacement can be suppressed. In addition, since the strength with which the human grips the grip 10 is approximately the same every time, the positional shift of the feature point due to pressure fluctuation when the hand is pressed against the detection unit 30 can be suppressed. Even when the grip 10 is provided with the detection unit 30 for detecting blood vessel shape information, the security of the personal authentication device 100 can be improved. Even if Mr. B applies a dummy of Mr. A's blood vessel shape information to his hand and grips the grip 10, the position of the feature point differs from Mr. A due to the difference in the size of the hand 50, and the user 90 is not Mr. A. This is because it can be recognized.

  Alternatively, the detection unit 30 may be provided at a position facing the palm, and the palm print information may be detected by the detection unit 30. At this time, the detection unit 30 used for detecting palmprint information is not particularly limited, and various known detection units can be used. Also, the feature point extraction method of the extraction unit 41 is not particularly limited, and various known feature point extraction methods can be used. Even in the case where the grip 10 is provided with the detection unit 30 for detecting palmprint information, personal authentication errors can be reduced as compared with the conventional case. When the user 90 grips the grip 10 while the first stopper 11 is hooked on the first joint 51c of the thumb 51, the palm becomes almost the same position every time, and the positional deviation of the feature points in the palm print information can be suppressed. Because. In addition, since the strength with which the human grips the grip 10 is approximately the same every time, the positional shift of the feature point due to pressure fluctuation when the hand is pressed against the detection unit 30 can be suppressed. Even when the grip 10 is provided with the detection unit 30 that detects palmprint information, the security of the personal authentication device 100 can be improved. Even if Mr. B applies a dummy of Mr. A's palm print information to his hand and grasps the grip 10, the position of the feature point differs from Mr. A due to the size of the hand 50, and the user 90 is not Mr. A. This is because it can be recognized.

  Also in the grip 10 according to the third embodiment, the second stopper 12 to the fourth stopper 14 may be provided as in the second embodiment. It is possible to further suppress the positional deviation of the feature points that occurs each time the detection unit 30 detects them, and to further obtain the above-described authentication error reduction effect and security improvement effect.

FIG. 16 is a diagram illustrating another example of the grip of the personal authentication device according to the third embodiment of the present invention. Note that FIG. 16 is obtained by adding an end side detection unit 31 and a side surface side detection unit 32 to the grip 10 shown in FIG. 9.
When the grip 10 includes a side surface side detection unit 32 that detects fingerprint information or blood vessel shape information of a finger that contacts the side surface 10b, at least one of the fingers whose information is detected by the side surface side detection unit 32 The second stopper 12 may be provided so as to be caught by the second joint. The circumferential direction of the grip 10 of the finger that contacts the side surface portion 10b of the grip 10 with respect to the side surface side detection unit 32 by hooking the second stopper 12 on the second joint of the finger that contacts the side surface portion 10b and grasping the grip 10 Can be further suppressed. For this reason, it is possible to further suppress the misalignment of the feature points that occurs each time the detection is performed by the side surface side detection unit 32, and it is possible to further obtain the above-described authentication error reduction effect and security improvement effect.

FIG. 17 is a diagram showing still another example of the grip of the personal authentication device according to Embodiment 3 of the present invention. FIG. 17 is obtained by adding an end portion side detection unit 31 and a side surface side detection unit 32 to the grip 10 shown in FIG.
When the grip 10 includes a side surface side detection unit 32 that detects fingerprint information or blood vessel shape information of a finger that contacts the side surface 10b, at least one of the fingers whose information is detected by the side surface side detection unit 32 A third stopper 13 may be provided so as to contact the side portion. The axial direction of the grip 10 of the finger that contacts the side surface portion 10b of the grip 10 with respect to the side surface side detection unit 32 by bringing the third stopper 13 into contact with the side portion of the finger that contacts the side surface portion 10b and gripping the grip 10. Can be further suppressed. For this reason, it is possible to further suppress the misalignment of the feature points that occurs each time the detection is performed by the side surface side detection unit 32, and it is possible to further obtain the above-described authentication error reduction effect and security improvement effect.

FIG. 18 is a diagram showing still another example of the grip of the personal authentication device according to Embodiment 3 of the present invention. FIG. 18 is obtained by adding an end portion side detection unit 31 and a side surface side detection unit 32 to the grip 10 shown in FIG.
When the grip 10 includes the end side detection unit 31 that detects fingerprint information or blood vessel shape information of the thumb 51 that contacts the upper end 10a, the fourth stopper 14 may be provided on the upper end 10a. By providing the grip 10 with the fourth stopper 14, the lateral displacement of the thumb 51 with respect to the end side detection unit 31 can be further suppressed. For this reason, it is possible to further suppress the misalignment of the feature points that occurs each time the detection is performed by the end side detection unit 31, and to further obtain the above-described authentication error reduction effect and security improvement effect.

FIG. 19 is a diagram showing still another example of the grip of the personal authentication device according to Embodiment 3 of the present invention. FIG. 19A is a perspective view of the grip 10. FIG. 19B is a plan view of the grip 10. FIG. 19C is a side view showing a state in which the user 90 puts the finger pad 51 b of the terminal joint 51 a of the thumb 51 on the upper end portion 10 a of the grip 10.
The grip 10 shown in FIG. 19 is provided with a fifth stopper 15 at the upper end portion 10a of the grip 10 shown in FIG. The fifth stopper 15 protrudes upward from the upper end portion 10a, for example. Further, the fifth stopper 15 is provided at an end portion on the opposite side to the first stopper 11 when the upper end portion 10 a of the grip 10 is viewed in a plan view. That is, the fifth stopper 15 is provided at a position facing the tip of the thumb 51 when the user 90 grips the grip 10.

  In the case of a user 90 with a large hand 50, when gripping the grip 10 in a state where the first stopper 11 is hooked on the first joint 51c of the thumb 51, the finger pad 51b of the distal end 51a of the thumb 51 is the upper end 10a (in other words, Then, it may protrude from the detection range of the end side detection unit 31, and fingerprint information or blood vessel shape information may not be detected from the terminal node 51 a of the thumb 51. In this case, the user 90 may grip the grip 10 by bringing the tip of the thumb 51 into contact with the fifth stopper 15. Thereby, fingerprint information or blood vessel shape information can be detected by the end side detection unit 31. Further, when the fifth stopper 15 functions as a substitute for the first stopper 11 and the user 90 grips the grip 10, each finger and the joint of each finger are in the substantially same position each time. For this reason, even if the tip of the thumb 51 is brought into contact with the fifth stopper 15 and the grip 10 is gripped, the above-described authentication error reduction effect and security improvement effect can be obtained.

  The second stopper 12 to the fifth stopper 15 described above may be provided alone in the grip 10, and a plurality (for example, all) of these may be provided in the grip 10.

  1 box, 2 biological sensor, 10 grip, 10a upper end (first end), 10b side surface, 11 first stopper, 12 second stopper, 13 third stopper, 14 fourth stopper, 15 fifth stopper, 20 Imaging device, 21 First imaging device, 22 Second imaging device, 30 Detection unit 31 End side detection unit, 32 Side surface side detection unit, 40 Control device, 41 Extraction unit, 42 Storage unit, 43 Personal identification unit, 45 Battery, 50 hands, 51 thumb, 51a terminal, 51b finger pad, 51c first joint, 52 index finger, 52a terminal, 52b finger pad, 52c second joint, 53 middle finger, 54 ring finger, 55 little finger, 60 fingerprint, 60a , 61 Feature points, 62 Wrinkles, 63 Wrinkles, 64 Wrinkles, 65 Wrinkles, 66 Convex parts, 67 Convex parts, 68 Convex parts, 90 Use , 100 personal authentication device.

The personal authentication device according to the present invention includes a photographing device that photographs a user's hand from the outside, an extraction unit that extracts a feature point of the user from an image photographed by the photographing device, and a feature that is extracted by the extraction unit. A user holds a point that stores a point for each individual, compares the feature point extracted by the extraction unit with the feature point stored in the storage unit, and identifies the user and the user includes a cylindrical grip, and the imaging device, the hand of the user who became a state of holding a fist by grasping the grip, has a first imaging device for shooting the thumb side or al, The grip is configured to be gripped by a user such that a finger pad of the last node of the thumb is in contact with a first end which is one end, and a finger other than the thumb is in contact with a side surface. , Protruding from the first end, and when the user grips the grip, A first stopper that is hooked to the joint, and protrudes from the side surface so as to extend in the axial direction of the grip, and when a user grips the grip, the user is hooked to at least one second joint of the finger that contacts the side surface. A second stopper .

Claims (14)

A photographing device for photographing the user's hand from the outside;
An extraction unit that extracts a feature point of a user from an image photographed by the photographing device;
A storage unit for storing the feature points extracted by the extraction unit for each individual;
Comparing the feature points extracted by the extraction unit with the feature points stored in the storage unit, and specifying a user;
With
The personal authentication device, wherein the photographing device has a first photographing device for photographing a user's hand from the thumb side in a state where the user is holding a fist. The imaging device
2. The individual according to claim 1, further comprising a second photographing device that photographs the user's hand from the side facing the index finger, middle finger, ring finger, and little finger when the user is holding a fist. Authentication device. The feature point extracted by the extraction unit from the image photographed by the photographing device is:
2. The shape and position of a wrinkle formed on a finger joint, the shape and position of a wrinkle formed between a thumb and an index finger, the position of a finger joint, and the position of a fingertip, Or the personal authentication apparatus of Claim 2.   4. The photographing apparatus according to claim 1, wherein the photographing device photographs a user's hand holding a fist by bringing a finger of the last node of the thumb into contact with a finger of the last finger of the index finger. The personal authentication device according to any one of the above.   The personal authentication device according to any one of claims 1 to 3, further comprising a cylindrical grip gripped by a user.   The grip is configured to be gripped by a user such that a finger pad of the terminal node of the thumb contacts a first end which is one end, and a finger other than the thumb contacts a side surface. The personal authentication device according to claim 5. The grip is
The personal authentication device according to claim 6, further comprising a first stopper that protrudes from the first end portion and is caught by a first joint of a thumb when a user grasps the grip. The grip is
A second stopper that protrudes from the side surface portion so as to extend in the axial direction of the grip and is hooked to at least one second joint of a finger that contacts the side surface portion when the user grips the grip; The personal authentication device according to claim 7. The grip is
The personal authentication device according to claim 7, further comprising a third stopper that contacts at least one side portion of the finger that contacts the side surface portion. The grip is
10. The fourth stopper according to claim 7, further comprising a fourth stopper that protrudes from the first end portion and faces both side portions of the thumb when the user grips the grip. The personal authentication device described in 1. The grip includes a detection unit that detects at least one of user fingerprint information, palmprint information, and blood vessel shape information of a hand,
The personal authentication device according to claim 7, wherein the extraction unit extracts a feature point of a user from a detection result of the detection unit. The grip is
The detection unit includes at least an end side detection unit that detects fingerprint information or blood vessel shape information of the distal end of the thumb that contacts the first end, as the detection unit,
The personal authentication device according to claim 11, further comprising a fifth stopper that protrudes from the first end and faces the tip of the thumb when the user grips the grip. The grip is
The personal authentication device according to any one of claims 5 to 12, further comprising a biometric sensor at a position that comes into contact with a user's hand when the user grips the grip.   The personal authentication device according to any one of claims 1 to 13, wherein a battery is used as a power source.

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