JP4963388B2 - Biometric authentication device and operation guidance notification method - Google Patents

Description

  The present invention relates to a personal authentication technique based on biometric information acquired from a user.

  In recent years, there is an increasing number of cases where biometric information representing human biometric features is used in personal authentication with an automated teller machine (ATM) or personal authentication in entry / exit management of restricted areas. . Examples of biometric information used in personal authentication include fingerprints, finger and palm vein patterns, and iris iris patterns. As an authentication method using biometric information, an authentication method described in Patent Document 1 below can be cited.

JP 2004-049705 A

  In personal authentication using biometric information, a user performs an operation (authentication operation) such as holding a predetermined body part such as a hand or an eye over an authentication device. However, due to lack of understanding of the operation, variation in operation, or the like, a correct authentication operation may not be performed, and authentication may fail despite being the person himself / herself. As a result, there has been a problem that the success rate of authentication determination is reduced.

  An object of the present invention is to suppress a decrease in the success rate of authentication determination due to a failure of a user authentication operation in a biometric authentication device using biometric information.

In order to achieve the above object, a biometric authentication device of the present invention is a biometric authentication device that performs personal authentication based on biometric information representing a biometric feature at a predetermined part of a user, and uses the biometric information as a user. A biometric information acquisition unit that acquires from the predetermined site, an imaging unit that images at least the predetermined site, a personal authentication unit that performs the personal authentication based on the biometric information, and a guide that notifies the user of operation guidance A notification unit, and a control unit, wherein the control unit controls the imaging unit when the biometric information acquisition unit attempts to acquire the biometric information, and images the predetermined part and performs authentication. The operation image is acquired, the operation image at the time of authentication is compared with a registered operation image registered in advance, and the arrangement position of the predetermined part when the operation image at the time of authentication is acquired based on the comparison result But the correct position If it is determined whether or not the arrangement position is deviated from the correct position, operation guidance corresponding to the position deviation is notified to the user by controlling the guidance notification unit, and the operation guidance is provided. Includes contents for designating a moving direction in which a predetermined part should be moved so that the arrangement position is a correct position, and the moving direction is a three-dimensional direction .

  As described above, in the biometric authentication apparatus of the present invention, when acquiring biometric information, a predetermined part is photographed to acquire an authentication operation image, and the authentication operation image is compared with the registration operation image. Since the operation guidance according to the comparison result is notified to the user, it is possible to allow the user to perform an operation using a predetermined part in the same manner as the registered operation image, and to lead to successful authentication. Therefore, it is possible to suppress a decrease in the success rate of the authentication determination due to the failure of the user authentication operation.

  In the biometric authentication device, the control unit determines that an arrangement position of the predetermined part when the authentication operation image is acquired is based on a comparison result between the authentication operation image and the registration operation image. When the control unit determines that the arrangement position is deviated from the correct position, the control unit controls the guide notification unit to use the operation guidance according to the position deviation. You may make it notify a person.

  By adopting such a configuration, the user is notified of the operation guidance according to the positional deviation of the predetermined part. Therefore, how the arrangement position of the predetermined part is shifted and how the predetermined part is changed. It is possible to know whether or not the correct placement position is obtained by placing. Therefore, when the user performs the operation again, the possibility that the predetermined part is arranged at the correct arrangement position is increased, and a decrease in the success rate of the authentication determination can be suppressed.

  In the biometric authentication apparatus, the operation guidance may include content for designating a moving direction in which the predetermined part is to be moved so that the arrangement position is a correct position.

  With such a configuration, it is possible to inform the user how to move the predetermined part specifically to arrange it at the correct position.

  In the biometric authentication device, the moving direction may be a three-dimensional direction.

  With such a configuration, it is possible to prompt the user to correct the three-dimensional positional shift of the predetermined part.

  In the biometric authentication apparatus, the operation guidance may include content for designating the moving direction on a composite image obtained by superimposing the authentication operation image and the registration operation image.

  With this configuration, the user can be made to accurately understand the direction in which the predetermined part should be moved.

  In the biometric authentication device, the control unit continuously controls the guidance notification unit to indicate to the user an operation guidance indicating that the predetermined part should be moved until the arrangement position is correct. When the notification is made and the arrangement position is correct, the operation notification indicating that the arrangement position is the correct position may be notified to the user by controlling the guidance notification unit. .

  With such a configuration, the user can be made to learn the correct arrangement position of the predetermined part empirically.

  In the biometric authentication apparatus, the control unit may notify the operation guidance by controlling the guidance notification unit when the result of the personal authentication is an authentication failure.

  By adopting such a configuration, the user can know whether or not the authentication has failed due to the operation for authentication when the user authentication fails. Therefore, when the user performs the operation again, the possibility that the predetermined part is arranged at the correct arrangement position is increased.

  In the biometric authentication device, the case where the result of the personal authentication is an authentication failure may include a case where the biometric information acquisition unit cannot acquire the biometric information.

  With such a configuration, when the biometric information cannot be acquired, the user is notified of the operation guidance, so that the user can be made to perform the correct operation thereafter, and the personal authentication can be led to success.

  In the biometric authentication apparatus, in the personal authentication, when the matching rate between the acquired biometric information and the registered biometric information is equal to or greater than a predetermined value, the control unit performs the authentication operation image and the registration operation image. If the matching rate is lower than the predetermined value, the authentication operation image may not be compared with the registered image.

  With such a configuration, when the user himself / herself did not perform a correct operation, the matching rate is equal to or higher than a predetermined value, but an operation guidance can be notified when authentication fails. Therefore, if there is a high probability that authentication will be successful if correct operation is performed, it is not necessary to notify the operation guidance when a third party performs an operation and authentication fails. The processing load for notifying can be reduced.

  In the biometric authentication apparatus, the photographing unit may photograph the predetermined part from a plurality of directions when acquiring the authentication operation image.

  With such a configuration, it is possible to accurately detect a positional shift of a predetermined portion at the time of authentication with reference to a correct arrangement position.

  The present invention can be realized in various forms, for example, an operation guidance notification method, a computer program for realizing the operation guidance notification method or the function of the biometric authentication apparatus, and the computer program recorded therein. The present invention can be realized in the form of a recording medium, a data signal including the computer program and embodied in a carrier wave, and the like.

Hereinafter, the best mode for carrying out the present invention will be described in the following order based on examples.
A. First embodiment:
B. Second embodiment:
C. Third embodiment:
D. Fourth embodiment:
E. Fifth embodiment:
F. Variations:

A. First embodiment:
A1. Device configuration:
FIG. 1 is an explanatory view showing the appearance of an ATM to which a biometric authentication apparatus as an embodiment of the present invention is applied. The ATM 100 includes a touch panel 120, a biological information acquisition unit 130, a camera CA1, a camera CA2, and a speaker SP. The touch panel 120 displays a menu screen and various operation guidance, and accepts a touch input by the user. The biometric information acquisition unit 130 includes a CCD (Charge Coupled Devices) camera (not shown). The biometric information acquisition unit 130 photographs a hand (finger) placed on the biometric information acquisition unit 130 and uses the obtained image as a biometric information. The vein pattern is extracted. The cameras CA1 and CA2 are CCD cameras and can acquire a still image.

  In the ATM 100, personal authentication is performed when a user performs cash refund or transfers. Specifically, when the user places his / her hand on the biological information acquisition unit 130 in accordance with the operation guidance displayed on the touch panel 120, a finger vein pattern is extracted in the biological information acquisition unit 130. If the extracted vein pattern matches the vein pattern of the person registered in advance, the user authentication is successful, and the user can continue to perform processing such as refund and transfer. In addition, the operation | movement which a user puts a hand in the biometric information acquisition part 130 is called "authentication operation" below.

  FIG. 2 is an explanatory diagram showing a part of the ATM 100 when the personal authentication is performed. When the user places his / her hand on the biometric information acquisition unit 130, the hand (palm surface) is photographed by the cameras CA1 and CA2 in parallel with the hand (palm surface) being photographed by the biometric information acquisition unit 130. . At this time, the camera CA1 photographs the hand placed on the biometric information acquisition unit 130 from above, and the camera CA2 photographs the hand placed on the biometric information acquisition unit 130 from the side. The ATM 100 is configured to display operation guidance on the touch panel 120 based on images taken by the cameras CA1 and CA2 and to output the operation guidance from the speaker SP (FIG. 1). In the following, the camera CA1 is referred to as an upper camera CA1, and the camera CA2 is referred to as a side camera CA2.

  FIG. 3 is a block diagram showing the internal configuration of the ATM 100. In addition to the touch panel 120, the biological information acquisition unit 130, the speaker SP, the upper camera CA1, and the side camera CA2, the ATM 100 further includes a touch panel control unit 121, a voice control unit 122, and an entry / exit. A gold mechanism unit 124, a card / passbook processing mechanism unit 126, a photographing control unit 128, a personal authentication unit 132, a line connection unit 105, and a main control unit 110 are provided.

  The touch panel control unit 121 transmits display data such as a menu screen and operation guidance to the touch panel 120 and transmits information input from the touch panel 120 to the main control unit 110. The voice control unit 122 generates a voice signal based on the voice information and transmits it to the speaker SP. The deposit / withdrawal mechanism unit 124 is a mechanism for storing money put into the ATM 100 in a safe (not shown) inside the ATM 100 and paying out necessary money from the safe. The card / passbook processing mechanism unit 126 is a mechanism for reading an account number from a cash card inserted into the ATM 100 and writing in a passbook inserted into the ATM 100. The shooting control unit 128 gives a shooting instruction to the upper camera CA1 and the side camera CA2, and transmits an image obtained by shooting to the main control unit 110. The personal authentication unit 132 performs personal authentication based on the finger vein pattern, which is biometric information. The line connection unit 105 has an interface for connecting the ATM 100 to the network 150. The main control unit 110 performs integrated control of each functional unit described above.

  In addition, the imaging | photography control part 128 and camera CA1, CA2 are equivalent to the imaging | photography part in a claim, and the touchscreen control part 121 and the touchscreen 120, the audio | voice control part 122, and the speaker SP are equivalent to the guidance notification part in a claim.

  The ATM 100 is connected to the host computer 200 via the network 150. The host computer 200 includes a vein pattern database 201 that manages a vein pattern registered in advance for each account user, and an operation image database 202 that manages an operation image registered in advance for each account user. ing. Here, the operation image is an image of a hand when the user performs an authentication operation, and is generated and registered in the operation image database 202 as follows. When the user opens an account, the ATM 100 performs an authentication operation in a simulated manner. At this time, the hand placed on the biometric information acquisition unit 130 is photographed by the upper camera CA1 and the side camera CA2, and the obtained image is registered in the operation image database 202 as a registered operation image. In the example of FIG. 3, for the user A, registered operation images F <b> 1 and F <b> 2 are registered in the operation image database 202. Here, the registration operation image F1 is an image obtained by photographing with the upper camera CA1, and the registration operation image F2 is an image obtained by photographing with the side camera CA2.

A2. Authentication process:
FIG. 4 is a flowchart showing the procedure of the personal authentication process executed in the ATM 100. When a user selects a refund menu on the touch panel 120 and inserts a cash card into the ATM 100 in order to refund cash, an operation guide for placing a hand on the biometric information acquisition unit 130 is displayed on the touch panel 120. At the same time, the personal authentication process is executed in the ATM 100. In the following, it is assumed that the user is the above-described user A.

  When the personal authentication process shown in FIG. 4 is started, the biometric information acquisition unit 130 (FIG. 3) determines whether or not the hand is placed on the biometric information acquisition unit 130 (step S305). If it is determined in step S305 that the hand has been placed, the biological information acquisition unit 130 captures the hand placed on the biological information acquisition unit 130, extracts a finger vein pattern from the obtained image, and The imaging control unit 128 controls the upper camera CA1 and the side camera CA2 to image the hand placed on the biometric information acquisition unit 130, and acquires an operation image (authentication operation image) (step S310). .

  Next, the personal authentication unit 132 requests the host computer 200 for the registered vein pattern of the user A using the account number recorded in the cash card as a key, and receives the registered vein pattern transmitted from the host computer 200. A registered vein pattern is acquired (step S315). Next, the personal authentication unit 132 determines whether or not the vein pattern acquired in step S310 matches the registered vein pattern acquired in step S315, and performs personal authentication (step S320).

  Next, the main control unit 110 determines whether the personal authentication has failed (step S325). If it is determined that the authentication has failed, the main control unit 110 requests the host computer 200 for a registration operation image of the user A using the account number recorded in the cash card as a key, and is transmitted from the host computer 200. Registration operation images F1 and F2 (FIG. 3) are acquired (step S330). It should be noted that in the case where it is determined that the authentication has failed, the matching rate between the vein pattern acquired in step S310 and the registered vein pattern acquired in step S315 is lower than a predetermined value (for example, 97%), and step S310. In some cases, vein patterns could not be acquired.

  Next, the main control unit 110 compares the operation image during authentication acquired in step S310 with the registered operation images F1 and F2 acquired in step S330 (step 335), and authenticates using the registered operation image as a reference. It is determined whether or not the hand position shown in the hour operation image is shifted (step S340).

  FIG. 5 is an explanatory diagram showing the authentication operation image and the registered operation images F1 and F2 compared in step S335. In the example of FIG. 5, the authentication operation image f1 captured by the upper camera CA1 and the registration operation image F1 are compared, and the authentication operation image f2 captured by the side camera CA2 and the registration operation image F2 are compared. ing. In comparison between the authentication operation image f1 and the registration operation image F1, the position of the hand of the authentication operation image f1 is shifted in the lower left direction (upper right direction as viewed from the user) with respect to the position of the hand of the registration operation image F1. ing. Further, in the comparison between the authentication operation image f2 and the registration operation image F2, the position of the hand of the authentication operation image f2 is shifted upward (in the direction away from the ATM 100) with respect to the position of the hand of the registration operation image F2. Yes. Note that these misregistrations are realized by, for example, extracting a region having a skin color pixel (that is, a hand region) in each of the images f1 and F1 and performing pattern matching on these two skin color regions. be able to.

  If it is determined in step S340 that there is a positional deviation of the hand, the main control unit 110 controls the touch panel control unit 121 to display an operation guide corresponding to the positional deviation on the touch panel 120 and the voice control unit 122. The operation guidance voice according to the positional deviation is controlled and output from the speaker SP (step S345).

  FIG. 6 is an explanatory diagram showing the operation guidance image displayed on the touch panel 120 in step S345. As described above, when the position of the hand is shifted in the upper right direction when viewed from the user and in the direction away from the ATM 100, the operation guide image W1 includes an operation guide prompting the user to place the hand again. At the same time, an operation guide for specifically instructing correction of the authentication operation (direction in which the hand is moved) so as to eliminate the positional deviation of these hands is displayed. Note that the operation guidance is output as sound from the speaker SP.

  After the operation guidance display and voice output are executed in step S345, the process returns to step S305 again, and identification of the user, determination of hand misalignment, and the like are performed again. On the other hand, if it is determined in step S325 that the authentication is successful, or if it is determined in step S340 that the hand is not misaligned, the result of the personal authentication is stored in a storage unit (not shown) (step S350). ), The personal authentication process ends. As a result of the personal authentication process, when the authentication is successful, the cash refund process is continuously executed. On the other hand, in the case of authentication failure, the cash card is ejected from the ATM 100 and the fact that the authentication has failed is displayed on the touch panel 120. Note that the case where it is determined in step S340 that there is no misalignment of the hand is a case where the third party has performed a correct authentication operation, but the personal authentication has failed because the vein patterns do not match.

  As described above, when the position of the hand placed on the biometric information acquisition unit 130 is misaligned, the operation guidance instructing the correction of the authentication operation is displayed on the touch panel 120 and the sound is output from the speaker SP. The correct authentication operation can be performed to lead to successful authentication. In addition, in the operation guidance, a specific hand position is instructed so as to eliminate the positional deviation according to the positional deviation of the hand, so that the positional deviation of the hand can be prevented from occurring again. It is possible to suppress a decrease in the success rate of the authentication determination due to the malfunction. In addition, since the operation guidance is displayed every time the user authentication fails due to the displacement of the hand, the user can repeatedly learn the correct authentication operation, and the correct authentication operation can be fixed. In addition, in the determination of the hand misalignment, the authentication operation image is compared based on the registered operation image of the user who has been registered in advance. Compared to the above, it is possible to reduce the influence on the determination due to physical individual differences, authentication operation traps, and the like. In addition, since there are two cameras that photograph the hand at the time of the authentication operation, the upper camera CA1 and the side camera CA2, the presence / absence of the positional deviation of the hand and the positional deviation are compared with the configuration of photographing with one camera. The direction can be detected accurately.

B. Second embodiment:
FIG. 7 is a flowchart showing the procedure of the personal authentication process in the second embodiment. FIG. 7 is obtained by adding step S328 to FIG. 4 and deleting step S340, and the other steps are the same as those in FIG. In the first embodiment, when it is determined in step S325 that the personal authentication is unsuccessful, the processing after step S330 is always executed to determine the presence / absence of hand misalignment, display operation guidance, and the like. It was. On the other hand, in the second embodiment, the identity authentication fails, and the matching rate between the vein pattern acquired in step S310 and the registered vein pattern acquired in step S315 is a predetermined value or more. Only in such a case, determination of the presence / absence of hand misalignment, display of operation guidance, and the like are executed.

  Specifically, if it is determined in step S325 that the authentication has failed, the main control unit 110 determines that the matching rate between the vein pattern acquired in step S310 and the registered vein pattern acquired in step S315 is a predetermined value (for example, 90 %) Or more is determined (step S328). If these vein patterns match with a relatively high value of 90% or more, authentication failed because the user of the account was performing the authentication operation and the position of the hand was shifted (match) The rate is lower than 97%). Therefore, when it is determined that the matching rate of the vein pattern is 90% or more, the above-described steps S330, S335, and S345 are sequentially executed to perform a correct authentication operation. If it is determined in step S328 that the vein pattern matching rate is lower than 90%, the above-described step S350 is executed, and the personal authentication process is terminated.

  With the above-described configuration, it is possible to check the presence / absence of misalignment, display operation guidance, and the like only when there is a high possibility of successful authentication if a correct authentication operation is performed. Therefore, when a third party performs an authentication operation, the coincidence rate between the vein pattern acquired in step S310 and the registered vein pattern acquired in step S315 is likely to be lower than 90%. ˜S345 need not be executed. Therefore, the processing load on the main control unit 110 can be reduced. Note that the predetermined value (90%) used in step S328 described above corresponds to the predetermined value in the claims.

C. Third embodiment:
FIG. 8 is a flowchart showing the procedure of the personal authentication process in the third embodiment. FIG. 8 changes step S310 of FIG. 4 to add step S312 and deletes step S325, and then changes the execution order of steps S315 to S320 and steps S330 to S345. The others are the same as the procedure of FIG. In the first embodiment, the user authentication is performed and then the hand misalignment is determined. In the third embodiment, the hand misalignment is first determined, and then the user authentication is performed. Is configured to do.

  Specifically, in the process of step S305 described above, when it is determined that the hand has been placed on the biometric information acquisition unit 130, unlike the first embodiment, only the operation image during authentication is acquired (step S310 '). Next, steps S330 to S340 described above are executed. If it is determined in step S340 that the position of the hand is shifted, the biological information acquisition unit 130 images the hand placed on the biological information acquisition unit 130, and the finger vein pattern from the obtained image. Is extracted and acquired (step S312). Next, steps S315 to S320 described above are executed. Then, the result of the personal authentication in step S320 is recorded (step S350), and the personal authentication process ends.

  With the configuration as described above, it is possible to correct the positional deviation of the hand before executing the personal authentication. Therefore, it is possible to suppress a decrease in the success rate of the authentication determination due to the authentication operation failure.

D. Fourth embodiment:
FIG. 9 is a flowchart showing the procedure of the personal authentication process in the fourth embodiment. FIG. 9 adds step S311 to FIG. 8, and the other steps are the same as those in FIG. In the third embodiment, the operation guidance is displayed and output in step S345 only when the hand is misaligned. In contrast, the fourth embodiment is configured to display the operation guidance on the touch panel 120 and output the operation guidance voice from the speaker SP in step S311 even when there is no position displacement of the hand. Yes.

  FIG. 10 is an explanatory diagram showing an operation guidance image displayed on the touch panel 120 in step S311. The operation guidance image W2 displays that the hand is placed at the correct position as well as that the authentication is currently being performed. In this way, even when a correct authentication operation is performed, the operation guidance is displayed and the like, so that the user can learn that the current hand position is the correct hand position. Therefore, the user can be expected to perform the correct authentication operation in the subsequent authentication operation, and the decrease in the success rate of the authentication determination due to the failure of the authentication operation can be suppressed.

  Also in the first and second embodiments, if the personal authentication is successful (step S325: NO), or if it is determined in step S340 that there is no misalignment of the hand, the hand is correctly positioned. You may make it display the operation guidance to the effect of having been put.

E. Fifth embodiment:
FIG. 11 is an explanatory diagram showing an operation guidance screen displayed on the touch panel 120 in the fifth embodiment. In the first embodiment, the operation guidance displayed on the touch panel 120 in step S345 specifically instructs the correction of the authentication operation with a character string as shown in FIG. On the other hand, in the fifth embodiment, correction is instructed by an image instead of a character string. Specifically, in the operation guidance image W3, together with an operation guidance prompting the user to put his hand again, an image F11 in which the registration operation image F1 and the authentication operation image f1 are superimposed, the registration operation image F2 and the authentication operation are displayed. An image F21 obtained by superimposing the operation image f2 is displayed. In the image F11, the hand of the registration operation image F1 is represented by a solid line, the hand of the operation image f1 at the time of authentication is represented by a broken line, and the direction in which the hand is moved to the correct position is represented by an arrow. ing. Similarly, in the image F21, the hand of the registration operation image F2 (solid line), the hand of the operation image f2 during authentication (broken line), and the direction in which the hand is moved (arrow) are shown. By adopting the above-described configuration, as in the first embodiment, the user is shown the direction in which the hand is specifically moved so as to eliminate the displacement of the hand placement position. When placing your hand, you can place your hand in the correct position.

F. Variations:
In addition, elements other than the elements claimed in the independent claims among the constituent elements in the above embodiments are additional elements and can be omitted as appropriate. The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

F1. Modification 1:
In each of the embodiments described above, the operation guidance displayed when the position of the hand is shifted specifically instructs correction of the authentication operation. However, the present invention is not limited to this. Alternatively, it may be an operation guide for notifying at least that the authentication operation is not correct. For example, it may be an operation guide that notifies that “the hand is out of position. Please place your hand in the correct position”. Even with such a configuration, it is possible to prompt the user to perform a correct authentication operation, and it is possible to suppress a decrease in the success rate of the authentication determination due to a failure of the authentication operation. Further, with such a configuration, it is only necessary to detect whether or not the position of the hand is displaced, so that it is not necessary to detect the specific direction of the displacement, and the operation image comparison process in step S335 Can be performed at high speed.

F2. Modification 2:
In each of the above-described embodiments, the registration operation image is an image obtained by photographing the authentication operation for each user in a simulated manner, but the present invention is not limited to this, Any image that can confirm the position of the hand when performing a correct authentication operation can be used. For example, let a certain person perform a correct authentication operation in a simulated manner, and an image obtained by photographing a hand at that time is set as a reference operation image. Then, this reference operation image can be used when all the users are compared with the operation image at the time of authentication. With such a configuration, the operation of acquiring and registering operation images in advance for each user can be omitted.

F3. Modification 3:
In each of the embodiments described above, the storage location of the registered operation image is the operation image database 202 of the host computer 200. However, the present invention is not limited to this, and any storage location accessible from the ATM 100 can be used. The structure to store may be sufficient. For example, the registration operation image may be stored in a storage medium (not shown) such as a hard disk included in the ATM 100. For example, the cash card may include an IC chip including a CPU and a memory, and the registered operation image may be stored in a memory in the IC chip. Even with such a configuration, the main control unit 110 can acquire the registered operation image, and can compare the registered operation image with the authentication operation image.

F4. Modification 4:
In each of the embodiments described above, the number of cameras that capture the hand during the authentication operation is the upper camera CA1 and the side camera CA2, but the present invention is not limited to two, and any number of cameras can be used. It can be set as the structure which uses this camera. Further, as shown in FIG. 1, the installation position of the camera for photographing the hand at the time of the authentication operation is not limited to the upper side and the left side as viewed from the biometric information acquisition unit 130, and is configured to be installed on the lower side or the right side. You can also

F5. Modification 5:
In each of the embodiments described above, the biometric information used for the personal authentication is a finger vein pattern, but the present invention is not limited to this, and any biometric information that can be acquired from a specific part of the body is used. It can be configured. For example, a fingerprint, a palm vein pattern, an iris eyelid pattern, or the like may be used as biometric information. In a configuration in which a fingerprint or a palm vein pattern is used as biometric information, operation guidance corresponding to the positional deviation of the hand may be displayed, as in the above-described embodiments. In the configuration using the iris eyelid pattern as biometric information, if the eye held over the biometric information acquisition unit is deviated from the correct position, an operation guide corresponding to the misalignment of the eye is displayed. Good.

F6. Modification 6:
In each of the above-described embodiments, the device to which the biometric authentication device is applied is ATM. However, the present invention is not limited to ATM, and can be applied to any device that requires personal authentication. For example, the biometric authentication device of the present invention can be applied to an authentication-dedicated machine for performing entrance / exit management installed on a wall surface or the like next to a door.

F7. Modification 7:
In each of the embodiments described above, the operation guidance is displayed on the touch panel 120 and the operation guidance voice is output from the speaker SP. However, the present invention is not limited to this, and the operation guidance display and the operation guidance are displayed. The voice output can be configured to execute at least one of them. If the ATM 100 has a printing device, the user can print out the operation guide instead of displaying or outputting the operation guide, or in addition to displaying or outputting the operation guide. It is also possible to adopt a configuration for notifying to.

F8. Modification 8:
In the above-described fourth embodiment, in step S345, a specific hand movement direction corresponding to the positional deviation of the hand is indicated in the operation guide. However, instead of the specific movement direction, the hand is simply moved. It is also possible to adopt a configuration that shows what should be done in the operation guide. In such a configuration, the user “moves his / her hand” until the position of the hand disappears and an operation guide (FIG. 10) indicating that the hand is placed at the correct position is displayed in step S311. The operation guidance to that effect will be notified. Therefore, the user tries to move his / her hand in various directions until the correct position is reached, and the correct placement position can be learned empirically.

F9. Modification 9:
In each of the above-described embodiments, a part of the configuration realized by hardware may be replaced with software. Conversely, a part of the configuration realized by software may be replaced by hardware. Good.

It is explanatory drawing which shows the external appearance of ATM which applied the biometrics apparatus as one Example of this invention. It is explanatory drawing which shows a part of ATM100 at the time of identity authentication. It is a block diagram which shows the internal structure of ATM100. It is a flowchart which shows the procedure of the personal authentication process performed in ATM100. It is explanatory drawing which shows the operation image at the time of authentication and registration operation image F1, F2 compared in step S335. It is explanatory drawing which shows the operation guidance image displayed on the touch panel 120 in step S345. It is a flowchart which shows the procedure of the personal authentication process in a 2nd Example. It is a flowchart which shows the procedure of the personal authentication process in a 3rd Example. It is a flowchart which shows the procedure of the personal authentication process in a 4th Example. It is explanatory drawing which shows the operation guidance image displayed on the touch panel 120 in step S311. It is explanatory drawing which shows the operation guidance screen displayed on the touch panel 120 in a 5th Example.

Explanation of symbols

100 ... ATM
DESCRIPTION OF SYMBOLS 105 ... Line connection part 110 ... Main control part 120 ... Touch panel 121 ... Touch panel control part 122 ... Voice control part 124 ... Depositing / withdrawing mechanism part 128 ... Imaging | photography control part 130 ... Biometric information acquisition part 132 ... Personal authentication part 150 ... Network 200 ... Host computer 201 ... Vein pattern database 202 ... Operation image database 335 ... Step 126 ... Card / passbook processing mechanism F1, F2 ... Registration operation image f1, f2 ... Authentication operation image W1 ... Operation guidance image W2 ... Operation guidance image SP ... Speaker CA1 ... Upper camera CA2 ... Side camera

Claims (8)

A biometric authentication device that performs personal authentication based on biometric information representing a biometric feature in a predetermined part of a user,
A biological information acquisition unit for acquiring the biological information from the predetermined part of the user;
An imaging unit for imaging at least the predetermined part;
A personal authentication unit that performs the personal authentication based on the biometric information;
A guidance notification unit for notifying the user of operation guidance;
A control unit;
With
The control unit controls the imaging unit when the biometric information acquisition unit attempts to acquire the biometric information, acquires the operation image during authentication by imaging the predetermined part, and the operation during authentication Whether the predetermined position of the predetermined position is shifted from the correct position when the image is compared with the registered operation image registered in advance and the operation image for authentication is acquired based on the comparison result If it is determined that the arrangement position is deviated from the correct position, the operation notification according to the position deviation is notified to the user by controlling the guidance notification unit,
The operation guidance includes contents for designating a moving direction in which the predetermined part should be moved so that the arrangement position is a correct position,
The moving direction is a three-dimensional direction.
Biometric authentication device. The biometric authentication device according to claim 1,
The operation guidance includes content for designating the moving direction on a composite image obtained by superimposing the operation image for authentication and the registration operation image.
Biometric authentication device. The biometric authentication device according to claim 1 or 2,
The control unit controls the guidance notification unit to continuously notify the user of operation guidance indicating that the predetermined part should be moved until the arrangement position becomes a correct position. Is the correct position, operation guidance indicating that the arrangement position is the correct position, the guidance notification unit is controlled to notify the user,
Biometric authentication device. The biometric authentication device according to any one of claims 1 to 3,
The control unit controls the guidance notification unit to notify the operation guidance when the result of the personal authentication is an authentication failure.
Biometric authentication device. The biometric authentication device according to claim 4, wherein
The case where the result of the personal authentication is an authentication failure includes a case where the biometric information acquisition unit cannot acquire the biometric information.
Biometric authentication device. The biometric authentication device according to claim 4 or 5,
In the identity authentication, when the matching rate between the acquired biometric information and the registered biometric information is equal to or greater than a predetermined value, the control unit compares the authentication operation image with the registered operation image, When the rate is lower than the predetermined value, the authentication operation image is not compared with the registered operation image.
Biometric authentication device. The biometric authentication device according to any one of claims 1 to 6,
The imaging unit captures the predetermined part from a plurality of directions when acquiring the authentication operation image.
Biometric authentication device. An operation guidance notification method for notifying a user of operation guidance in a biometric authentication device that performs personal authentication based on biometric information representing biometric features in a predetermined part of the user,
(A) obtaining the biological information from the predetermined part of the user;
(B) when acquiring the biometric information, capturing the operation image during authentication by photographing the predetermined part;
(C) The operation position at the time of authentication is compared with a registered operation image registered in advance, and based on the comparison result, the arrangement position of the predetermined part when the operation image at authentication is acquired is: Determining whether or not the position is shifted from the correct position, and when determining that the arrangement position is shifted from the correct position , notifying the user of the operation guidance according to the position shift ;
Equipped with a,
The operation guidance includes contents for designating a moving direction in which the predetermined part should be moved so that the arrangement position is a correct position,
The moving direction is a three-dimensional direction.
Operation guidance notification method.

Images