JP5013984B2 - Facial finger combined authentication system - Google Patents

Description

  The present invention is a combination of face authentication and finger authentication as biometric authentication, and relates to a face / finger combined authentication system applied to an entrance / exit management system or the like.

  In the case of normal biometric authentication, the similarity between the data registered in advance at the time of verification and the data acquired by the authentication device is determined, and if the authentication threshold is exceeded, the user is authenticated. In particular, in face authentication, since face data is extracted and collated based on image data taken by a camera at the time of collation at the time of registration, the influence of changes due to the surrounding environment is large.

  For this reason, it may be difficult to obtain data exceeding the authentication threshold due to the difference in environment between registration and verification. By performing the registration work in the installation environment, it is possible to avoid the influence due to the difference in environment from the time of registration, but it is troublesome to register each when using a plurality of devices.

  As such an authentication device, by determining the reliability of a plurality of biometric information input for each authentication and setting a threshold according to the reliability, individual physical condition change, secular change, use environment difference There are some that realize high authentication accuracy and reliability in consideration of the above (for example, see Patent Document 1).

  If the authentication device described in Patent Document 1 is used, the load of registration can be reduced, but each device can be updated only by each device. In addition, when registration data is shared by a plurality of devices, it can be updated at a time, but the data does not correspond to the environment of each device.

  Further, in the authentication device described in Patent Document 1, since the registration data is replaced by update, when the environment changes in a short time such as day and night on the same device, the time lapse is small and the illumination (brightness) ) Is large, it becomes difficult to update with night data when updated in the daytime, and authentication cannot be performed with appropriate data at night. In the authentication device described in Patent Document 1, since the update is always performed when the update condition is met at the time of authentication, the above-described state cannot be avoided.

JP 2003-44858 A

  As described above, in a system that uses face data registered in advance and performs authentication, the face is photographed and authenticated, so the difference between the environment at the time of registration and the environment where the authentication device is actually installed The accuracy of authentication falls due to the change.

  Further, when using a plurality of devices, all of the device data must be individually updated. If a plurality of devices have the same registration data, the data is not updated according to the environment. Furthermore, in one apparatus, there is a problem that accuracy is lowered by repeating environmental changes in a short time such as day and night.

  The present invention has been made to solve such a problem, and even when an authentication device is placed in an environment where authentication accuracy is lowered, data according to the installation environment can be dynamically registered. An object of the present invention is to obtain a face / finger combined authentication system that can reduce the time and effort required for registration and perform authentication with data suitable for the environment.

  The face / finger combined authentication system according to the present invention is connected to a plurality of face / finger combined authentication devices that capture face data and finger data, perform authentication by collating with registered data, and the plurality of face / finger combined authentication devices. And a server that pre-registers face device data for each face / finger composite authentication device and face / finger common data common to the plurality of face / finger composite authentication devices, The authentication device temporarily stores the face data captured at the time of the face authentication start operation, checks whether the temporarily stored face data is registered as the device data in the server, and the check result indicates a corresponding device If there is data for the device, face matching is performed using the device data. If there is no corresponding device data, face matching is performed using the common data. If the threshold obtained by face matching is equal to or greater than a predetermined authentication threshold , Verification OK If the threshold value obtained by face matching is equal to or smaller than a certain threshold value smaller than the authentication threshold value, matching NG processing is performed, and the threshold value obtained by face matching is larger than the certain threshold value and smaller than the authentication threshold value. If there is, the captured finger data is collated with the finger data registered as the common data in the server, and if the result of the collation is that the person is authenticated, the temporarily stored face data is stored in the server as device data. And a verification OK process.

  According to the present invention, even when the authentication device is placed in an environment where the authentication accuracy is lowered, data according to the installation environment can be registered dynamically, and the face depends on the difference in the installation environment of the device. It is possible to automatically prevent a decrease in authentication accuracy simply by performing authentication work, reducing the trouble of registration, and performing authentication with data suitable for the environment.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing an outline of a face / finger combined authentication apparatus applied to the present invention. 1 includes a camera 100 for capturing face data, a finger placement unit 101 for capturing finger data, and an operation guidance unit 102 for guiding authentication operation, and is not illustrated. Built-in CPU, ROM for storing processing programs and fixed data, and RAM for temporarily storing processing data, input data, etc. When performing face authentication, after operation by the operation guidance unit 102 or user face image Is automatically read from the camera 100, collated with the registered face data, and the authentication result is displayed on the operation guidance unit 102. When performing authentication with a finger, a finger placement instruction is displayed on the finger placement unit 101. When the user places a finger on the finger placement unit 101, the finger data is captured and the registered finger data is collated. Identity identification is performed.

  FIG. 2 is a block diagram showing the configuration of the complex finger authentication system according to Embodiment 1 of the present invention. As shown in FIG. 2, the face / finger composite authentication system according to Embodiment 1 is connected to a plurality of face / finger composite authentication apparatuses 202 having the configuration shown in FIG. Each of the face / finger composite authentication apparatuses 202, and a server 200 in which face and finger common data common to the plurality of face / finger composite authentication apparatuses 202 are registered in advance. The composite authentication device 202 temporarily stores the face data captured at the time of the face authentication start operation, checks whether or not the temporarily stored face data is registered as device data in the server 200, and the check result corresponds. If there is device data, face matching is performed using the device data. If there is no corresponding device data, face matching is performed using the common data, and the threshold obtained by face matching is greater than or equal to a predetermined authentication threshold. If you If the threshold value obtained by performing face matching and the threshold obtained by face matching is less than or equal to a certain threshold value smaller than the authentication threshold value, performing the matching NG process and if the threshold value obtained by face matching is greater than the certain threshold value and smaller than the authentication threshold value The captured finger data is collated with the finger data registered as common data in the server 200, and when the result of the collation is that the person is authenticated, the temporarily stored face data is registered in the server 200 as device data. The verification OK process is performed.

  In other words, the face 200 and common finger data common to the plurality of face-to-face composite authentication devices 202 are registered in the server 200 in advance. The user performs authentication with the face / finger composite authentication apparatus 202, and when a value equal to or greater than a certain threshold is obtained, but when a value equal to or greater than the authentication threshold is not obtained, the face / finger complex authentication apparatus 202 displays the operation guidance unit 102. The finger placement instruction is displayed. When the user places his / her finger on the finger placement unit 101, the finger data is captured, and when the user is authenticated by collating with the registered finger data, the face / finger authentication device 202 issues a face registration instruction to the server 200. Be notified. Furthermore, the server 200 registers or updates the device data of the face / finger composite authentication device 202 that has been instructed to register. The next time the user performs an authentication operation, the registered device data is used.

  Next, the control contents of the face / finger composite authentication apparatus 202 will be described according to the flowchart shown in FIG. 3 which is stored in a ROM (not shown) and operates based on the control of the CPU. First, when a face authentication start operation is performed and the user performs face authentication (step S1), a face image is read from the camera 100 (step S2: face detection). At this time, the face image is temporarily stored in a RAM (not shown) (step S3). Then, it is determined whether the temporarily stored face data is registered in the server 200 as device data for authentication (step S4). If registered as device data, face matching is performed using device data (step S5). If device data is not registered, face matching is performed using common data common to all previously registered devices. (Step S6).

  Next, the threshold value obtained by face matching is checked (step S7). If a value equal to or greater than the authentication threshold value is obtained, matching OK processing is performed and the authentication operation is terminated (step S13). On the other hand, if only a value equal to or less than a certain value smaller than the authentication threshold can be obtained as a threshold, the verification NG process is performed and the authentication operation is terminated (step S14). If the threshold is in a range larger than a certain threshold and smaller than the authentication threshold, a finger placement instruction is displayed on the operation guidance unit 102 (step S8). Thereafter, when the finger is placed on the finger placement unit 101, the finger data is taken in, collated with the finger data registered in the server 200 (step S10), and if authenticated, the user is temporarily stored in the server 200 (step S11). The stored face data and face device data are registered (step S12), a verification OK process is performed (step S13), and the authentication operation is terminated. If the user is not authenticated by comparing with the finger data (step S11), an NG process (step S14) is performed, and the authentication operation is terminated.

  Therefore, according to the first embodiment, even when the face / finger authentication device is placed in an environment where the authentication accuracy is lowered, data corresponding to the installation environment can be dynamically registered and registered. It is possible to reduce the time and effort of authentication and to perform authentication with data suitable for the environment. Further, since face device data can be registered for each device only when the threshold value does not reach the authentication threshold value, it is not necessary to have dedicated data for all devices. In addition, the apparatus data can be automatically updated even when the threshold value is lowered due to an environmental change or the like, and the face of another person can be prevented from being registered by performing finger authentication. Furthermore, by setting the authentication threshold value and the constant threshold value for each face / finger composite authentication apparatus, it is possible to obtain authentication accuracy corresponding to each face / finger composite authentication apparatus.

It is a figure which shows schematic structure of the face finger composite authentication apparatus which concerns on Embodiment 1 of this invention. 1 is a system configuration diagram of a face / finger composite authentication apparatus according to Embodiment 1 of the present invention; FIG. It is a flowchart explaining the control content of the face-to-face composite authentication device according to Embodiment 1 of the present invention.

Explanation of symbols

  100 camera, 101 finger placement unit, 102 operation guidance unit, 200 server, 202 face finger combined authentication device.

Claims (2)

A plurality of face / finger combined authentication devices that perform authentication by capturing face data and finger data and verifying with registered data;
Connected to the plurality of face-to-face composite authentication devices, the face device data for each face-to-face composite authentication device and the face and finger common data common to the plurality of face-to-face composite authentication devices in advance With a registered server,
The face finger combined authentication device temporarily stores the face data captured at the time of face authentication start operation, checks whether the temporarily stored face data is registered as the device data in the server, and the check result If there is corresponding device data, perform face matching with the device data, and if there is no corresponding device data, perform face matching with the common data,
If the threshold value obtained by face matching is equal to or greater than a predetermined authentication threshold value, a matching OK process is performed. If the threshold value obtained by face matching is equal to or smaller than a predetermined threshold value smaller than the authentication threshold value, a matching NG process is performed. If the threshold obtained by the collation is greater than the predetermined threshold and smaller than the authentication threshold, the captured finger data is collated with the finger data registered as the common data in the server, and the collation result and the person are authenticated. If it is, the face-finger authentication system is characterized in that the temporarily stored face data is registered in the server as device data and a verification OK process is performed. In the face finger compound authentication system according to claim 1,
The authentication threshold and the predetermined threshold are set for each face / finger composite authentication device.

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