JP2018195061A - Authentication system, authentication method, and gate - Google Patents

Abstract

To provide an authentication system, an authentication method, and a gate capable of improving authentication accuracy by photographing a face facing a direction of a photographing device.SOLUTION: An authentication system includes an ID acquisition device (1) for acquiring an ID associated with a person to be authenticated, a photographing device (2), an ID acquired by the ID acquisition device (1), an information processing device (3) that performs authentication processing based on a photographed image photographed by the photographing device (2), and an output device (4) for outputting a result of the authentication processing; where the output device (4) is provided in a vicinity of the photographing device (2).SELECTED DRAWING: Figure 1

Description

  The present invention relates to an authentication system, an authentication method, and a gate.

  Conventionally, face authentication has been used in an entrance / exit management system of an office building (for example, Patent Document 1).

JP2015-1790A

  In face authentication, it is necessary to photograph a face in a state where the person to be authenticated is facing the direction of a photographing apparatus such as a camera. If the person to be authenticated does not face the direction of the image capturing apparatus at the time of shooting, the authentication accuracy may be reduced.

  Therefore, an object of the present invention made in view of the above-described problems and the like is an authentication system, an authentication method, and an authentication method capable of improving the authentication accuracy by photographing a face in a state of facing the photographing apparatus. To provide a gate.

In order to solve the above problem, an authentication system according to an embodiment of the present invention includes:
An ID acquisition device that acquires an ID associated with the person to be authenticated;
A photographing device;
An information processing apparatus that performs an authentication process based on the ID acquired by the ID acquisition apparatus and a captured image captured by the imaging apparatus;
An output device for outputting a result of the authentication process;
And the output device is provided in the vicinity of the photographing device.

An authentication method according to an embodiment of the present invention includes:
Obtaining an ID associated with the person to be authenticated;
Photographing the person to be authenticated by a photographing device;
Performing an authentication process based on the ID and a photographed image photographed by the photographing device;
Outputting the result of the authentication process by an output device provided in the vicinity of the photographing device;
including.

  Moreover, the gate which concerns on one Embodiment of this invention is provided with the above-mentioned authentication system.

  According to the authentication system, the authentication method, and the gate according to the embodiment of the present invention, the authentication accuracy can be improved.

It is a schematic diagram of an authentication system concerning one embodiment of the present invention. It is a block diagram of the information processing apparatus of the authentication system which concerns on one Embodiment of this invention. It is an example of user DB which information processing apparatus memorizes. It is an example of a master image and a picked-up image. It is a figure which shows the imaging | photography object period. It is a figure which shows the example of arrangement | positioning of the imaging device and output device of the authentication system which concerns on one Embodiment of this invention. It is a flowchart which shows operation | movement of the authentication system which concerns on one Embodiment of this invention. It is a verification experiment result of the authentication system which concerns on one Embodiment of this invention.

  Embodiments of the present invention will be described below.

(Embodiment)
FIG. 1 is a schematic diagram of an authentication system 10 according to an embodiment of the present invention. As shown in FIG. 1, an authentication system 10 according to an embodiment of the present invention includes an ID acquisition device 1, a photographing device 2, an information processing device 3, an output device 4, and a network device 5. The ID acquisition device 1 is connected to the information processing device 3. The imaging device 2, the information processing device 3, and the output device 4 are connected by a network device 5. The authentication system 10 according to the present embodiment is provided, for example, in a gate or the like. When the authentication is successful, the gate is opened. When the authentication is unsuccessful, the gate is closed. As described above, the gate including the authentication system 10 can be used for entrance / exit management, and can be provided at the entrance of an office building, business office, factory, or the like.

  The ID acquisition device 1 is a device that acquires an ID. The ID is information for uniquely identifying an authentication target person who uses this system. The ID acquisition device 1 is connected to the information processing device 3 through a predetermined interface, and the predetermined interface includes a USB. In addition, it may replace with a predetermined | prescribed interface and may connect via a predetermined | prescribed network apparatus. When acquiring the ID, the ID acquisition device 1 transmits the ID to the information processing device 3.

  For example, the ID acquisition device 1 includes a card reader and acquires an ID from an ID card held by the person to be authenticated. When employing an ID card, for example, an arbitrary code such as a barcode or a two-dimensional barcode may be written on the ID card, or an IC chip or the like may be provided on the ID card. When a code is written on an ID card, information related to the ID is included in the code. By using the code, it is possible to make it difficult to grasp the ID only by visually recognizing the code written on the ID card, and the information protection effect can be easily enhanced. As the card reader, either a contact type card reader or a non-contact type card reader may be adopted depending on the type of the ID card. When a non-contact type card reader is employed, it is not necessary to contact the ID acquisition device, which is preferable in terms of hygiene, for example, in an environment where hands and cards are easily soiled.

  The photographing device 2 includes a CCD camera, a CMOS camera, and the like, and transmits a photographed image obtained by photographing the photographing range regularly (for example, every 0.5 seconds) to the information processing device 3.

  The information processing device 3 is a server device or the like managed by a system administrator of the authentication system. In addition, although the example which comprises the information processing apparatus 3 with notebook PC is shown in FIG. 1, it is not restricted to this. In general, the information processing apparatus 3 performs an authentication process based on the ID acquired by the ID acquisition apparatus 1 and the captured image captured by the imaging apparatus 2. Hereinafter, each configuration of the information processing apparatus 3 including the authentication process performed by the information processing apparatus 3 will be described.

  FIG. 2 shows a block diagram of the information processing apparatus 3. The information processing device 3 includes a communication unit 31, a storage unit 32, and a control unit 33. The communication unit 31, the storage unit 32, and the control unit 33 are connected by a bus 34. Note that the information processing apparatus 3 may be provided with a plurality of these components, and may be appropriately used according to each function of the information processing apparatus 3. Further, the information processing device 3 itself may be configured by a plurality of devices. When the information processing device 3 itself is configured by a plurality of devices, each function and each configuration of the information processing device 3 may be divided into the respective devices to share the roles, or each configuration may be made redundant. The information processing apparatus 3 may include an input unit such as a keyboard and a display unit such as a display in addition to these functional blocks.

  The communication unit 31 includes an interface that communicates with each external device wirelessly or by wire and transmits and receives data. In the present embodiment, the communication unit 31 communicates with the imaging device 2 and the output device 4 by wire via the network device 5. The communication unit 31 communicates with the ID acquisition device 1 through a predetermined interface.

  The storage unit 32 includes a primary storage device and a secondary storage device configured by, for example, a semiconductor memory, a magnetic memory, or an optical memory. The storage unit 32 stores various information and programs necessary for authentication processing according to the present system. For example, the storage unit 32 stores a captured image captured by the imaging device 2. The captured image includes information related to the shooting date and time. Further, for example, the storage unit 32 stores a database related to users (hereinafter referred to as a user DB).

(User DB)
The user DB includes arbitrary information unique to each user. In the present embodiment, the user DB includes an ID, a master image, a registration date, and an attribute as shown in FIG. 3, for example. That is, the master image, the registration date, and the attribute are associated with each ID.

  The master image is a face image to be used for authentication of the person to be authenticated corresponding to the ID, and the user DB includes the file name of the face image. In order to perform the authentication process, a face image of the person to be authenticated is captured in advance, and the captured image is registered in the authentication system 10 (stored in the user DB). The image quality of the master image may be the same as or different from the image quality of the photographed image by the photographing device 2, and may be higher in resolution than the photographed image, for example. The registration date is the date when the master image is registered in the authentication system 10. The registration date may be the shooting date of the master image. The attribute is arbitrary information related to the authentication target person corresponding to the ID, and includes information such as an elderly person, a visually impaired person, and a hearing impaired person. In FIG. 3, the information of the user DB is shown by one table, but such information need not be managed by one table or database, and may be managed by a plurality of tables or databases. For example, in FIG. 3, information related to attributes may be managed separately in another table.

  The control unit 33 includes one or more processors. The processor may include a general-purpose processor that reads a specific program and realizes a specific function, and a dedicated processor specialized for specific processing. The control unit 33 controls the overall operation of the information processing apparatus 3. For example, the control unit 33 communicates with the ID acquisition device 1, the imaging device 2, or the network device 5 through the communication unit 31.

  The control unit 33 performs an authentication process based on the ID acquired by the ID acquisition device 1 and the captured image captured by the imaging device 2. Specifically, based on the ID acquired by the ID acquisition device 1, the control unit 33 acquires the master image of the person to be authenticated corresponding to the ID from the user DB. In addition, the control unit 33 may be a target period (hereinafter, referred to as “ID acquisition time”, which may be the time when the ID acquisition device 1 acquires an ID (or the time when the information processing device 3 receives an ID). A photographed image photographed during the photographing target period is acquired from the storage unit 32. FIG. 4 shows an example of the master image 20 corresponding to the ID and the captured images 21 to 25. In this way, the authentication process is performed based on the master image 20 and at least one captured image.

  Here, the imaging target period will be described with reference to FIG. The time when ID is acquired (when ID is acquired) is Tx. In this case, the time before the first predetermined time from the ID acquisition time Tx is Ta. The period from Ta to Tx is defined as an imaging target period T1. The time after the second predetermined time from the ID acquisition time Tx is defined as Tb. The period from Tx to Tb is defined as a shooting target period T2. The photographing target period T1 is a photographed image photographed by the photographing device 2 before the ID acquisition device 1 obtains an ID. On the other hand, the photographing target period T2 is a photographed image photographed by the photographing device 2 after the ID is obtained by the ID obtaining device 1. The first predetermined time and the second predetermined time can be arbitrarily determined according to the possibility that the person to be authenticated is included in the photographed image by the photographing apparatus 2. For example, the first predetermined time and the second predetermined time may be 4 seconds and 1 second, respectively.

  First, the control unit 33 performs an authentication process based on the photographed image in the photographing target period T1. Specifically, the control unit 33 acquires the captured image captured during the capturing target period T1 from the storage unit 32 based on the captured date and time of the captured image. Then, the control unit 33 performs face detection processing on the acquired captured image. The face detection process is a process of finding a face from a captured image, and a conventionally known method can be employed. The captured image in which the face is found by the face detection process is compared with the master image of the person to be authenticated corresponding to the ID. Also for the matching process, a conventionally known method such as an other-point part detection method, a multi-factor feature identification method, a perturbation space method, or the like can be employed. The verification score is calculated by these methods, and the control unit 33 determines the result of face authentication (authentication success or authentication failure). As a method for determining the result of face authentication, a conventionally known method can be adopted. When the authentication is successful, the control unit 33 transmits the authentication result to the output device 4.

  When authentication fails in the authentication process based on the captured image in the shooting target period T1, the control unit 33 performs the authentication process based on the captured image in the shooting target period T2. The authentication processing method is the same as described above. That is, the control unit 33 acquires the captured image captured in the capturing target period T2 from the storage unit 32 based on the captured date and time of the captured image. And the control part 33 performs the acquired face detection process. The captured image in which the face is found by the face detection process is compared with the master image of the person to be authenticated corresponding to the ID. The control unit 33 calculates a matching score and outputs a face authentication result (successful matching or unsuccessful matching) based on the matching score. Then, the control unit 33 transmits the authentication result to the output device 4.

  The output device 4 is a warning lamp (pat lamp), a display, a speaker, or the like, and outputs the result of the authentication process by the authentication system 10. When outputting with visual information, a patrol lamp or a display is used. For example, when outputting a result by a patrol lamp, the patrol lamp lights up blue when authentication is successful. On the other hand, when authentication fails, the patrol lamp lights red. When outputting by voice information, a patrol lamp or a speaker is used. Both visual information and audio information may be output. In this case, a patrol lamp is used. Further, an authentication result may be output by arbitrarily combining a patrol lamp, a display, and a speaker.

  Here, the output device 4 is provided in the vicinity of the photographing device 2. FIG. 6 shows the positional relationship between the imaging device 2 and the output device 4. As shown in FIG. 6, the photographing device 2 is provided at a position where the face of the authentication subject person A can be photographed. The output device 4 is provided adjacent to the photographing device 2. Since the output device 4 outputs the result of the authentication process, the line of sight of the person A to be authenticated is directed to the output device 4. Since the output device 4 is provided in the vicinity of the photographing device 2, when the line of sight of the person A to be authenticated is directed to the output device 4, the output device 4 is necessarily directed to the photographing device 2. For this reason, the captured image captured by the imaging device 2 is naturally a front image of the person A to be authenticated or an image close to the front image within a certain time range centering on the timing when the output result is displayed by the output device 4.

  Note that “the output device 4 is provided in the vicinity of the photographing device 2” means that the output device 4 is provided within a predetermined distance range of the photographing device 2, for example. Here, the predetermined distance range can be set as appropriate. For example, the predetermined distance range is set so that when the authentication target person A looks at the output device 4, the imaging apparatus 2 can capture almost the front image of the authentication target person A.

  The network device 5 is a device for connecting the imaging device 2, the information processing device 3, and the output device 4, and includes a PoE power supply switching hub, a switching hub, a router, and the like. In the present embodiment, an example in which a PoE power supply switching hub is used as the network device 5 is shown, but the present invention is not limited to this. When a PoE power supply switching hub is used, power can be supplied to a connected device (for example, the imaging device 2).

  Next, the operation of the authentication system 10 according to an embodiment of the present invention will be described with reference to the flowchart shown in FIG. Here, a case where the ID acquisition device 1 is a card reader will be described.

  First, the ID acquisition device 1 acquires an ID from an ID card held by the person to be authenticated (step S10). If the ID cannot be acquired, the step is repeated. If the ID can be acquired, the ID acquisition device 1 transmits the ID to the information processing device 3.

  When the ID can be acquired in step S10, the information processing apparatus 3 performs an authentication process using the captured image in the imaging target period T1 (step S20). Specifically, when receiving an ID from the ID acquisition device 1, the control unit 33 performs an authentication process based on the ID and at least one photographed image photographed during the photographing target period T1.

  As a result of the authentication processing in step S20, if the authentication is successful (step S30: Yes), the output device 4 receives the processing result of the information processing device 3, and outputs that the authentication is successful (step S40). Specifically, the control unit 33 of the information processing device 3 transmits the authentication result to the output device 4. Then, the output device 4 outputs the result of authentication processing (authentication success) based on the received authentication result. Then, the process ends.

  On the other hand, when the authentication fails as a result of the authentication process in step S20 (step S30: No), the information processing apparatus 3 performs the authentication process using the captured image of the imaging target period T2 (step S50). Specifically, the control unit 33 of the information processing device 3 performs authentication processing based on the ID and at least one photographed image photographed during the photographing target period T2. Since the imaging target period T2 is a period after the ID is acquired by the ID acquisition device 1, the possibility that the authentication target person looks at the output device 4 is higher than the period other than the period. In other words, there is a high possibility that the person to be authenticated is facing the photographing apparatus 2. In this way, the photographed image is optimized in the photographing target period T2.

  As a result of the authentication processing in step S50, when the authentication is successful (step S60: Yes), the output device 4 receives the processing result of the information processing device 3, and outputs that the authentication is successful (step S40). Then, the process ends.

  On the other hand, when the authentication fails as a result of the authentication processing in step S50 (step S60: No), the output device 4 receives the processing result of the information processing device 3, and outputs that the authentication has failed (step S70). Then, the process ends. In this case, authentication is performed again from the first step S10. In this case, the person to be authenticated can draw more attention to the authentication result, can direct the line of sight toward the output device 4, and can increase the possibility that the person to be authenticated is facing the direction of the imaging device 2.

  FIG. 8 shows a result of the verification experiment by the authentication system 10 according to the embodiment of the present invention. The demonstration experiment was conducted outdoors for three days from October 24, 2016 to October 26, 2016. Further, after the first authentication failure (step S70 in FIG. 7), the second authentication is performed. In general, the first authentication succeeded with a probability of 96% or more. Further, when the results of the first authentication and the second authentication processing are combined, the success probability of the authentication processing is 100%.

  Here, in FIG. 8, the number of authentications indicates the number of authentication processes on each implementation date. The number of successful authentications / ratio at one time indicates the number of successful authentications in step S30 or step S60 in FIG. 7 and the ratio of the number of successful authentications in the number of authentications on each implementation date. The ratio is shown in parentheses in FIG. The number of successful authentications / ratio in two times means the number of successful authentications in step S30 or step S60 in the second authentication process after authentication failure in step S60 in FIG. Indicates the ratio of the number of successful authentications. The ratio is shown in parentheses in FIG. The number of successful daytime authentications / average verification score is the average value of the number of successful authentications in the daytime (7:00 to 17:00) and the verification score in the case of successful authentication. The average matching score is shown in parentheses in FIG. The number of successful night authentications / average verification score is an average value of the number of successful authentications at night (17:00 to 22:00) and the verification score when authentication is successful among the number of successful authentications at one time. The average matching score is shown in parentheses in FIG. In this system, it is determined that the authentication is successful when the matching score is 0.6 or more. As shown in the verification experiment result of FIG. 8, according to the authentication system 10, the probability of successful authentication by one authentication process is extremely high. Even if the authentication process fails once, the authentication process is surely successful in the second authentication. In addition, it was possible to maintain the same level of authentication accuracy as daytime even in darker environments such as nighttime.

  As described above, according to the authentication system 10 according to the embodiment of the present invention, since the output device 4 is provided in the vicinity of the photographing device 2, there is a possibility that a face in a state facing the direction of the photographing device 2 can be photographed. And the accuracy of authentication can be improved.

  Further, according to the authentication system 10 according to an embodiment of the present invention, the authentication process is performed based on the ID acquired by the ID acquisition device 1 and the captured image captured by the imaging device 2. Since the target master image is specified based on the ID and authentication processing is performed using the master image and the captured image, the authentication speed can be improved. As a result, the authentication process can be performed smoothly and without stress, and the throughput of passing people such as gates can be improved.

  Further, in the technique of Patent Document 1, the authentication accuracy depends significantly on the performance of the authentication device 50 (particularly, the processing unit 80) in Patent Document 1 and the performance of the person tracking unit 81 to the display control unit 85 by the processing unit 80. To do. On the other hand, in the authentication system 10 according to an embodiment of the present invention, authentication is performed by combining the position of the output device 4 and the ID acquisition device 1 with the information processing device 3 (corresponding to the authentication device 50 of Patent Document 1). The dependence of the performance of the information processing device 3 and the accuracy of authentication processing by the information processing device 3 on the authentication accuracy of the system 10 can be very low. In other words, according to the authentication system 10 according to an embodiment of the present invention, it is not necessary to increase the performance of the information processing device 3 and the accuracy of the authentication processing by the information processing device 3, and as a result, the information processing device 3 and the degree of freedom of selection such as authentication processing by the information processing apparatus 3 can be further increased.

  Further, according to the authentication system 10 according to an embodiment of the present invention, the information processing device 3 performs an authentication process using the captured image of the imaging target period T1 before the ID acquisition by the ID acquisition device 1. After the ID acquisition by the ID acquisition device 1, the authentication process is performed using the captured image that has been acquired before the ID acquisition, so that the authentication speed can be improved. As a result, the authentication process can be performed smoothly and without stress, and the throughput of passing people such as gates can be improved.

  Further, according to the authentication system 10 according to an embodiment of the present invention, the information processing apparatus 3 performs an authentication process using a captured image in the shooting target period T1, and fails in authentication (step S30 in FIG. 7: No), an authentication process is performed using the captured image of the imaging target period T2. Since the imaging target period T2 is a period after the ID is acquired by the ID acquisition device 1, the possibility that the authentication target person looks at the output device 4 is higher than the period other than the period. Accordingly, it is possible to increase the possibility of photographing a face in the state of facing the photographing device 2 and improve the authentication accuracy.

  Note that, when a card reader is used as the ID acquisition device 1, the ID is acquired from the ID card held by the person to be authenticated, but the present invention is not limited to this. For example, instead of using an ID card, a mobile terminal such as a smartphone held by the person to be authenticated may be used. In this case, for example, an arbitrary code such as a barcode or a two-dimensional barcode may be displayed on the mobile terminal and read by the ID acquisition device 1. Alternatively, the mobile terminal may have the same function as the IC chip. In addition to using a card reader as the ID acquisition device 1, the ID acquisition device 1 may be a device capable of biometric authentication, and the person to be authenticated may be uniquely specified by biometric authentication. Alternatively, an input device such as a numeric keypad that can input an ID may be used as the ID acquisition device 1. In this case, the ID is acquired by causing the person to be authenticated to input his / her ID. When a biometric authentication device or an input device is used as the ID acquisition device 1, the person to be authenticated does not need to hold a card or the like. Further, the ID acquisition device 1 may appropriately combine these. For example, a card reader and an input device may be combined as the ID acquisition device 1, and either acquisition of an ID by an ID card held by the person to be authenticated or acquisition of an ID by input may be possible. In this way, it is possible to realize a system that can flexibly cope with the acquisition of an ID by the person to be authenticated when the ID card is forgotten while normally acquiring the ID smoothly with the ID card. be able to.

  Note that the ID acquisition device 1 may be provided in the vicinity of the photographing device 2. The line of sight of the person to be authenticated is highly likely to be directed to the ID acquisition device 1 when holding the ID card or the like. For this reason, by providing the ID acquisition device 1 in the vicinity of the photographing device 2, there is a high possibility that the face of the person A to be authenticated is necessarily directed to the photographing device 2. By doing in this way, possibility that the face of the state which has faced the direction of the imaging device 2 can be image | photographed can be raised more, and authentication precision can further be improved. Note that “the ID acquisition device 1 is provided in the vicinity of the imaging device 2” means that the ID acquisition device 1 is provided within a predetermined distance range of the imaging device 2, for example. Here, the predetermined distance range can be set as appropriate. For example, the predetermined distance range is set so that when the authentication target person A looks at the ID acquisition apparatus 1, the imaging apparatus 2 can capture almost the front image of the authentication target person A.

  In general, the card reader is often installed at a height near the waist of the authentication target person A for the purpose of reducing the burden on the authentication target person A. However, this increases the possibility that the face of the person A to be authenticated faces downward. Therefore, in the authentication system 10 according to an embodiment of the present invention, it is preferable to install the ID acquisition device 1 at a position higher than the waist, such as the height of the chest of the person A to be authenticated and the height of the face. However, even if the ID acquisition device 1 is too close to the photographing device 2, there is a possibility that the throughput of the number of passing people may be reduced due to the burden on the authentication target person A and the frequency of removal of the ID card. Therefore, it is more preferable that the ID acquisition device 1 is installed at a height up to the face position of the person A to be authenticated.

  As will be described later, when there are two or more photographing apparatuses 2, the ID acquisition apparatus 1 is used for the purpose of “highly probable that the face of the person A to be authenticated is necessarily directed to the photographing apparatus”. It is desirable to provide in the vicinity of the imaging device 2 provided first.

  In addition, you may change the output aspect of the authentication result by the output device 4 according to an authentication subject's attribute. For example, when the person to be authenticated is a visually handicapped person or a hearing handicapped person, the authentication result may be output only by output using sound or visual information, respectively. If you are an elderly person, for example, you may optimize the output of both sound and visual information or increase the volume. Alternatively, the language of sound (for example, voice information) to be output based on the attribute information may be the native language or language used of the person to be authenticated. Thus, the output mode of the authentication result by the output device 4 is made variable based on the ID acquired by the ID acquisition device 1. In this way, it is possible to attract more attention of the person to be authenticated to the output device 4. In addition, when making the output mode by the output device 4 variable, the control unit 33 of the information processing device 3 acquires the attribute information of the authentication target person from the user DB based on the ID acquired by the ID acquisition device 1. Then, based on the attribute information, instruction information relating to the output mode is transmitted to the output device 4. The output device 4 controls the output mode based on the instruction information. Alternatively, the control unit 33 may include the attribute information related to the ID in the authentication result transmitted to the output device 4. The output device 4 may change the output mode based on the received attribute information.

  Note that an infrared camera (IR camera) may be used as the photographing device 2. By using the IR camera, it is possible to obtain a photographed image with very little influence of ambient light and shadow. Therefore, (a) a photographed image can be obtained regardless of day and night, (b) a clear photographed image can be easily obtained for the face of the person A to be authenticated having body temperature, and ( c) Since a two-dimensional photographed image is easily obtained with respect to the face of the person A to be authenticated and the authentication process is easier, this is a more preferable aspect.

  When an IR camera is used as the photographing device 2, a light projecting device that projects infrared rays from the direction of the photographing device 2 toward the photographing range may be provided. By doing in this way, the quality of a picked-up image can be improved and authentication accuracy can be improved. Moreover, since infrared rays are emitted, there is no problem such as dazzling even if the front of the person to be authenticated is illuminated, and it is difficult to cause shadows by projecting from the front of the person to be authenticated. Can be obtained.

  In the present embodiment, an example in which one photographing apparatus 2 is used is shown, but the present invention is not limited to this, and there may be two or more photographing apparatuses. That is, for example, the authentication system 10 may include a second imaging device that captures an authentication subject from a different position from the imaging device 2. In this case, the information processing apparatus 3 may perform authentication processing based on a photographed image photographed by at least one of the photographing apparatus 2 and the second photographing apparatus. By doing in this way, since an authentication process can be performed by the picked-up image image | photographed from the position different from the imaging device 2, an authentication precision can further be improved. Note that the position different from the photographing device 2 is, for example, a position below the photographing device 2 in the vertical direction. In this case, the second imaging device captures a captured image in an imaging range obliquely above. By doing so, for example, even when the authentication target person faces downward (such as when searching for an ID card in a basket), the possibility that the face image of the authentication target person can be acquired increases. Note that the image quality of the imaging device 2 and the second imaging device may be the same or different.

  Further, when the second imaging device is used, authentication processing may be performed based on the captured image captured by the second imaging device only when the authentication fails by the imaging device 2 (step S60 in FIG. 7). By doing so, it is possible to reduce the processing load of the information processing apparatus 3 when the authentication can be successfully performed only by the photographed image by the photographing apparatus 2 and to suppress a decrease in the authentication speed.

  An IR camera may be used as the second imaging device. By using the IR camera, it is possible to obtain a photographed image with very little influence of ambient light and shadow. Therefore, (a) a photographed image can be obtained regardless of day and night, (b) a clear photographed image can be easily obtained for the face of the person A to be authenticated having body temperature, and ( c) Since a two-dimensional photographed image is easily obtained with respect to the face of the person A to be authenticated and the authentication process is easier, this is a more preferable aspect.

  When an IR camera is used as the second imaging device, a second projector that projects infrared rays from the direction of the second imaging device toward the imaging range may be provided. By doing in this way, the quality of a picked-up image can be improved and authentication accuracy can be improved. Moreover, since it is infrared rays, there is no problem such as dazzling even when the front of the person to be authenticated is illuminated, and shadows are less likely to occur when illuminated from the front, and a high-quality captured image can be obtained. Further, in this case, when photographing with the photographing device 2, the light projecting device that projects light from the direction of the photographing device 2 is turned on, and the second light projecting device is turned off. On the other hand, when photographing with the second photographing device, the light projecting device that projects light from the direction of the photographing device 2 is turned off, and the second light projecting device is turned on. By doing in this way, it can suppress that a shadow arises with a light projector or the 2nd light projector.

  Further, the information processing apparatus 3 may appropriately notify the master image update. For example, the information processing apparatus 3 performs authentication determination based on the master image and the captured image captured by the imaging apparatus 2, and if a predetermined condition is satisfied, the information processing apparatus 3 notifies the master image to be updated. The predetermined condition may include, for example, at least one of an authentication failure rate equal to or greater than a predetermined value, a collation score decrease rate equal to or greater than a predetermined value, or an average value of collation scores less than a predetermined value.

  When the notification for updating the master image is performed, the information processing device 3 may perform the notification by the output device 4. Specifically, for example, when a patrol lamp is used as the output device 4, it may be lit in yellow as a warning notification. Alternatively, the notification may be transmitted to the system administrator's terminal or the like by e-mail or the like.

  In this embodiment, when the authentication fails, the fact that the authentication has failed is output (step S70 in FIG. 7), the process is terminated, and the authentication is performed again from the first step S10. The control at the time of re-authentication processing after failure of the password may be appropriately changed. For example, in the re-authentication process, the information processing apparatus 3 uses a photographed image during a period from the time when authentication is output to the time when the ID is acquired, instead of using the photographed image during the photographing target period T1. You may do it. In this way, a photographed image with a high possibility that the person to be authenticated is looking at the output device 4 can be used, and a face in a state facing the direction of the photographing device 2 can be photographed. The authentication accuracy can be improved. In addition, since a photographed image before outputting that the authentication has failed is not used, it is possible to efficiently eliminate useless processing and reduce the processing load on the information processing apparatus 3.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each means, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of means, steps, etc. can be combined or divided into one. .

DESCRIPTION OF SYMBOLS 10 Authentication system 1 ID acquisition apparatus 2 Imaging device 3 Information processing apparatus 4 Output device 5 Network device 20 Master image 21-25 Captured image 31 Communication part 32 Storage part 33 Control part 34 Bus

Claims (11)

An ID acquisition device that acquires an ID associated with the person to be authenticated;
A photographing device;
An information processing apparatus that performs an authentication process based on the ID acquired by the ID acquisition apparatus and a captured image captured by the imaging apparatus;
An output device for outputting a result of the authentication process;
And the output device is provided in the vicinity of the photographing device.   The authentication system according to claim 1, wherein the photographing device is an infrared camera. The authentication system further includes:
The authentication system according to claim 2, further comprising a light projecting device that projects infrared rays toward the photographing range from the direction of the photographing device.   The information processing apparatus performs the authentication process based on at least one photographed image photographed from the first predetermined time before the ID acquisition by the ID acquisition apparatus to the ID acquisition time. The authentication system according to any one of the above.   5. The authentication system according to claim 4, wherein the information processing apparatus further performs the authentication process based on at least one photographed image photographed from a time when the ID is acquired until a second predetermined time later. The authentication system further includes:
A second imaging device that images the person to be authenticated from a different position from the imaging device;
The authentication system according to any one of claims 1 to 5, wherein the information processing apparatus performs the authentication process based on a photographed image photographed by at least one of the photographing apparatus and the second photographing apparatus.   The authentication system according to claim 6, wherein the information processing apparatus performs the authentication process based on a photographed image photographed by the second photographing apparatus only when authentication by the photographing apparatus fails.   The authentication system according to any one of claims 1 to 7, wherein an output mode of a result by the output device is variable based on an ID acquired by the ID acquisition device.   9. The information processing apparatus according to claim 1, wherein the information processing apparatus performs the authentication process using a master image and a photographed image photographed by the photographing apparatus, and performs notification for urging the master image to be updated when a predetermined condition is satisfied. The authentication system according to claim 1. Obtaining an ID associated with the person to be authenticated;
Photographing the person to be authenticated by a photographing device;
Performing an authentication process based on the ID and a photographed image photographed by the photographing device;
Outputting the result of the authentication process by an output device provided in the vicinity of the photographing device;
An authentication method that includes:   A gate comprising the authentication system according to any one of claims 1 to 9.

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