Authentication device, vehicle, authentication method, and recording medium

Abstract

Provided are an authentication device, a vehicle, an authentication method, and a recording medium which are capable of improving authentication accuracy in biometric authentication inside a mobile body.　This authentication device comprises: an imaging control means that changes imaging conditions and takes a plurality of images of a user riding in the mobile body; and a collation means that uses an image taken under a first imaging condition among the plurality of images and performs a first collation of a first location of biometric information of the user, and uses an image taken under a second imaging condition and performs a second collation of a second location different from the first location of the biometric information of the user.

Description

Authentication device, vehicle, authentication method, and recording medium

[0001] The present invention relates to an authentication device, a vehicle, an authentication method, and a recording medium.

[0002] Patent Document 1 discloses an imaging control device that can obtain information about the eyes, such as the position of the eyes, with high accuracy even when ambient light is reflected on the glass of eyeglasses, without causing inconveniences such as an increase in the size of the device or discomfort to the driver, etc. Specifically, the imaging control device described in this publication is described as increasing the illumination and controlling the illumination to be turned on for a short period of time, and shortening the exposure time, when it is determined that ambient light is being reflected on the glass of eyeglasses.

[0003] Japanese Patent Application Laid-Open No. 2008-242597

[0004] In biometric authentication in a moving body, there is a problem that biometric authentication using a captured image is difficult because the photographing conditions change significantly depending on whether it is day or night, the position of the light source, etc. In this regard, the imaging control device in Patent Document 1 is primarily focused on monitoring the driver's condition, and does not disclose any measures to prevent a decrease in the accuracy of biometric authentication.

[0005] The present disclosure aims to provide an authentication device, a vehicle, an authentication method, and a recording medium that can contribute to improving the authentication accuracy in biometric authentication in a moving body.

[0006] According to a first aspect, there is provided an authentication device including: an imaging control means for capturing a plurality of images of a user on a moving body under different imaging conditions; and a matching means for performing a first matching of a first part of the user's biometric information using an image captured under a first imaging condition among the plurality of images, and performing a second matching of a second part of the user's biometric information that is different from the first part using an image captured under a second imaging condition.

[0007] According to a second aspect, there is provided a vehicle equipped with the above-described authentication device.

[0008] According to a third aspect, there is provided an authentication method that takes a plurality of images of a user on a moving body under different shooting conditions, performs a first comparison of an image taken under a first shooting condition among the plurality of images with a first part of the user's biometric information, and performs a second comparison of an image taken under a second shooting condition with a second part of the user's biometric information that is different from the first part.

[0009] According to a fourth aspect, there is provided a recording medium having a program recorded thereon that causes a computer to execute the following processes: taking a plurality of images of a user on a moving body under different shooting conditions; performing a first comparison of an image taken under a first shooting condition among the plurality of images with a first part of the user's biometric information; and performing a second comparison of an image taken under a second shooting condition with a second part of the user's biometric information that is different from the first part.

[0010] According to the present disclosure, it is possible to provide an authentication device, a vehicle, an authentication method, and a recording medium that can contribute to improving the authentication accuracy in biometric authentication in a moving body.

[0011] FIG. 1 is a diagram showing one configuration of the present disclosure. FIG. 2 is a flowchart showing the operation of the present disclosure. FIG. 3 is a diagram for explaining the operation of the present disclosure. FIG. 4 is a diagram for explaining the operation of the present disclosure. FIG. 5 is a diagram showing one configuration of a vehicle of the present disclosure. FIG. 6 is a diagram showing one configuration of an authentication device of the present disclosure. FIG. 7 is a flowchart showing the operation of the present disclosure. FIG. 8 is a diagram showing another configuration of an authentication device of the present disclosure. FIG. 9 is another flowchart showing the operation of the present disclosure. FIG. 10 is a diagram for explaining the operation of the present disclosure. FIG. 11 is a diagram showing the configuration of a computer constituting an authentication device of the present disclosure.

[0012] First, an overview of one embodiment of the present disclosure will be described with reference to the drawings. In this disclosure, the drawings relate to one or more embodiments. The reference numerals in the drawings attached to this overview are attached to each element for convenience as an example to facilitate understanding, and are not intended to limit the present disclosure to the illustrated form. Furthermore, connecting lines between blocks in the drawings and the like referred to in the following description include both bidirectional and unidirectional lines. Unidirectional arrows are used to schematically indicate the flow of main signals (data) and do not exclude bidirectionality. A program is executed via a computer device, which includes, for example, a processor, a storage device, an input device, a communication interface, and, if necessary, a display device. Furthermore, this computer device is configured to be able to communicate with internal or external devices (including computers) via the communication interface, whether wired or wireless. Although ports or interfaces are present at the input / output connection points of each block in the drawings, they are not shown.

[0013] In one embodiment, the present disclosure can be realized by an authentication device 10 including an image capture control unit 11 and a matching unit 12, as shown in FIG. 1 . More specifically, the image capture control unit 11 captures a plurality of images of a user aboard a moving object under different image capture conditions. The matching unit 12 performs a first matching of a first part of the user's biometric information using an image captured under a first image capture condition among the plurality of images. Furthermore, the matching unit 12 performs a second matching of a second part of the user's biometric information, which is different from the first part, using an image captured under a second image capture condition.

[0014] The authentication device 10 configured as described above operates as follows. First, the authentication device 10 photographs the user under first photographing conditions using camera C (step S01 in FIG. 2). Then, the authentication device 10 photographs the user under second photographing conditions using camera C with the same composition, but with different photographing conditions (step S02 in FIG. 2). These two images can be photographed using a technique similar to so-called bracketing photography, which involves continuously photographing images while changing only the exposure and white balance. If camera C is equipped with a bracketing photography function, the user may be photographed using the bracketing photography function after adjusting the settings as appropriate.

[0015] Next, the authentication device 10 performs a first comparison between the image captured under the first photographing conditions and a first region of the user's biometric information (step S03 in FIG. 2).Furthermore, the authentication device 10 performs a second comparison between the image captured under the second photographing conditions and a second region of the user's biometric information that is different from the first region (step S04 in FIG. 2).

[0016] Fig. 3 shows an example of an image of a person TP to be authenticated, captured under a first photographing condition. In Fig. 3, the person is wearing glasses under conditions of strong ambient light, causing reflections on the glasses and preventing an image of the eyes from being obtained (note that for the sake of explanation, the reflections are emphasized in Fig. 3). In the first verification, such an image is verified against a first portion of the user's biometric information, i.e., a portion other than the eyes.

[0017] 4 shows an example of an image of the person TP to be authenticated, taken under second photographing conditions that are different from the first photographing conditions. In FIG. 4, the overall image is dark because the irradiating light is weakened, but reflections from the glasses are suppressed. In the second verification, this image is verified against a second portion of the user's biometric information, i.e., the eyes. (Note that for the sake of explanation, FIG. 4 emphasizes the dark image, but in reality, an image that can be used for biometric authentication can be used by adjusting the ISO value (ISO sensitivity), etc.)

[0018] As described above, the authentication device 10 of the present disclosure enables biometric authentication to be performed with a certain degree of accuracy even in situations where reflections occur on eyeglasses or parts of the face due to ambient light, etc. In the example of Fig. 1, the matching means 12 has been described as performing the first matching and the second matching, but the matching means 12 may also be configured separately as a first matching means that performs the first matching and a second matching means that performs the second matching.

[0019] [First embodiment] Next, a first embodiment in which an authentication device according to the present disclosure is mounted on a vehicle will be described. Fig. 5 is a diagram showing one configuration of a vehicle equipped with an authentication device 100 according to the present disclosure. Fig. 5 shows a vehicle V equipped with a camera C equipped with a ring light L on the outer periphery of the lens and the authentication device 100.

[0020] The camera C is, for example, a camera arranged in the vehicle cabin for performing face authentication. In this embodiment, the authentication device 100 acquires biometric information by capturing an image of the face of a user in the vehicle V using the camera C. The camera C is capable of freely changing image capturing parameters such as the shutter speed, aperture value, and ISO value (ISO sensitivity) based on a control signal from the authentication device 100.

[0021] The ring light L has a dimming function, and the brightness of the ring light L can be freely changed based on a control signal from the authentication device 100.

[0022] 6 is a diagram showing one configuration of the authentication device 100. The authentication device 100 includes an imaging control unit 101, a matching unit 102, and an authentication information storage unit 103. The imaging control unit 101 and the matching unit 102 correspond to the imaging control means 11 and the matching means 12, respectively.

[0023] The photographing control unit 101 photographs a facial image of a user aboard the vehicle V under a first photographing condition, and then photographs the facial image of the user under a second photographing condition. For example, the first photographing condition is set to ensure that the light from the ring light L is sufficiently incident on the user's face so that the entire user's face is captured clearly. For the second photographing condition, the light from the ring light L is reduced so that, even if the user is wearing glasses, reflection from the lens surface of the glasses is reduced. Furthermore, the exposure time and ISO value (ISO sensitivity) on the camera C side are also adjusted in accordance with changes in the light intensity of the ring light L. In other words, the intensity of light shining on the user or the exposure time can be used as the photographing condition. The photographing control unit 101 sends the images photographed under the first and second photographing conditions to the collation unit 102.

[0024] The matching unit 102 matches the user's facial image data or its features, which are registered in advance in the authentication information storage unit 103, with the image captured by the camera C to identify the user who is riding in the vehicle V. More specifically, the matching unit 102 matches the entire facial image of the user using an image captured under a first shooting condition (first matching). Furthermore, the matching unit 102 matches the area around the eyes of the facial image of the user using an image captured under a second shooting condition (second matching). The matching unit 102 performs user authentication based on the total score of the degree of match obtained by these two matching operations. If the total score is below a predetermined threshold, or if at least one of the scores in the two matching operations is below the predetermined threshold, the matching unit 102 determines that authentication has failed.

[0025] If the user authentication is successful, the matching unit 102 grants the previously granted authority to the user who boards the vehicle V. This allows the user to drive the vehicle V. On the other hand, if the user authentication is unsuccessful, the matching unit 102 locks the functions of the vehicle V and outputs an alert by sounding an alarm or displaying on a display device.

[0026] The authentication information storage unit 103 stores the user's facial image data or its features. The authentication information storage unit 103 may store first matching data and second matching data.

[0027] Next, the operation of this embodiment will be described in detail with reference to the drawings. Fig. 7 is a flowchart showing the operation of the present disclosure. Referring to Fig. 7, first, the authentication device 100 captures a facial image of a user who is in a vehicle V under a first photographing condition (step S001). Under the first photographing condition, the light from the ring light L is directed onto the user's face, and the image shown in Fig. 3, for example, is obtained.

[0028] Next, the authentication device 100 performs a comparison of the entire face image of the user using the image captured under the first photographing conditions (step S002). At this time, the eye portion of the face image of the user is lightly weighted for comparison. If there is no match with a registered face image of the user at this point, the subsequent second comparison may be omitted.

[0029] Next, the authentication device 100 captures a face image of the user under the second photographing condition (step S003). Under the second photographing condition, the light from the ring light L is suppressed, so that, for example, an image shown in FIG. 4 is obtained.

[0030] Next, the authentication device 100 performs a match on the area around the eyes of the face image of the user using the image captured under the second photographing conditions (step S004).

[0031] Next, if the result of the two checks indicates that the facial image data of the user who boarded the vehicle V matches the facial image data of a user registered in advance, the authentication device 100 determines that the authentication is successful (Yes in step S005). In this case, the authentication device 100 grants the user authority to operate the vehicle V, etc., within the scope granted to the user (step S006).

[0032] On the other hand, if it is determined that the facial image data of the user who boarded the vehicle V does not match any of the facial image data of pre-registered users, the authentication device 100 determines that the authentication has failed (No in step S005). In this case, the authentication device 100 locks the functions of the vehicle V and outputs an alert by sounding an alarm or displaying a message on the display device (step S007).

[0033] According to the present embodiment, which operates as described above, user authentication can be performed as is even if the user is wearing eyeglasses or the like. Of course, even if the user is not wearing eyeglasses or the like, the user can be authenticated through the first and second verifications. In particular, when performing facial authentication inside a vehicle V, the interior of the vehicle is often dark, and unintentional reflections may occur on the user's eyeglasses. However, according to the present disclosure, this effect can be suppressed, and authentication accuracy can be maintained.

[0034] In the above description, the authentication information storage unit 103 is described as being provided within the authentication device 100, but the authentication information storage unit 103 may be located on a network accessible by the authentication device 100. In this case, the authentication device 100 uses a communication function to access the authentication information storage unit 103 on the network and acquires facial image data or feature amounts of a user that has been registered in advance.

[0035] In the above description, the photographing conditions are changed to perform matching of the entire face and matching of the area around the eyes, but the parts of the biometric information to be matched in the first and second matching can be changed depending on the lighting environment inside the moving body, the camera performance, etc. For example, it is also possible to change the form so that the right side of the face is matched in the first matching and the left side of the face is matched in the second matching.

[0036] Second Embodiment In the first embodiment described above, the first and second verifications are performed regardless of whether the user is wearing eyeglasses, but a function for determining whether the user is wearing eyeglasses can be added to the authentication device 100. A second embodiment in which a function for determining whether the user is wearing eyeglasses is added to the authentication device 100 will be described below.

[0037] Fig. 8 is a diagram showing another configuration of the authentication device of the present disclosure. The differences from the authentication device 100 of the first embodiment shown in Fig. 5 are that an object detection unit 1021 is provided in the matching unit 102a of the authentication device 100a and that the operation of the matching unit 102a is different. Since the other configurations are the same as those of the first embodiment, the following description will mainly focus on the differences.

[0038] The object detection unit 1021 determines whether or not the user is wearing eyeglasses by referring to the facial image of the user sent from the imaging control unit 101. Note that as a method for the object detection unit 1021 to determine whether or not the user is wearing eyeglasses, various object detection techniques for detecting a preset object from an image can be used.

[0039] The matching unit 102a performs normal user authentication when the object detection unit 1021 determines that the user is not wearing glasses. Specifically, the matching unit 102a matches the facial image data or feature values ​​of the user registered in advance in the authentication information storage unit 103 with the image captured by the camera C under the first shooting conditions, thereby performing user authentication of the user who boarded the vehicle V.

[0040] On the other hand, if the object detection unit 1021 determines that the user is wearing glasses, the matching unit 102a, as in the first embodiment, performs a first matching and then a second matching with an image obtained under second shooting conditions to perform user authentication of the user aboard the vehicle V.

[0041] 9 is another flowchart illustrating the operation of the present disclosure. The authentication device 100a captures a facial image of a user who is in a vehicle V under a first photographing condition (step S001). This step is the same as in the first embodiment.

[0042] Next, the authentication device 100a refers to the captured facial image of the user and determines whether the user is wearing glasses (step S101). If it is determined that the user is not wearing glasses (Yes in step S101), the authentication device 100a performs face image verification (step S102).

[0043] The subsequent operation is the same as general face authentication, and if it is determined that the face image data of the user who boarded the vehicle V matches the face image data of a user registered in advance, the authentication device 100a determines that the authentication is successful (Yes in step S103). In this case, the authentication device 100a grants the user authority to operate the vehicle V, etc., within the scope granted to the user (step S104).

[0044] On the other hand, if it is determined that the facial image data of the user who boarded the vehicle V does not match any of the facial image data of pre-registered users, the authentication device 100a determines that the authentication has failed (No in step S103). In this case, the authentication device 100a locks the functions of the vehicle V and outputs an alert by sounding an alarm or displaying a message on the display device (step S105).

[0045] Furthermore, the operations performed when it is determined in step S101 that the user is wearing glasses are the same as steps S002 to S007 in FIG. 7, and therefore a description thereof will be omitted.

[0046] As described above, according to this embodiment, if the user is wearing glasses, two stages of image capture and verification are performed, and if not, one stage of image capture and verification is performed, which reduces the time required for user authentication when the user is not wearing glasses.

[0047] [Third Embodiment] In the first and second embodiments described above, user authentication is performed by face authentication, but the present disclosure can also be applied to a configuration in which user authentication is performed by iris authentication. Hereinafter, a third embodiment will be described in which a function of determining whether the user is wearing eyeglasses is added to the authentication device 100.

[0048] Fig. 10 is a diagram showing another configuration of the authentication device of the present disclosure. The differences from the authentication device 100 of the first embodiment shown in Fig. 5 are that the camera Cd and ring light Lb are for iris authentication, and that the imaging control unit 101b of the device 100b changes the imaging conditions for iris authentication. Since the other configurations are the same as those of the first embodiment, the following description will focus on the differences. Note that the ring light Lb may be capable of emitting light in the infrared range in addition to visible light in order to perform iris authentication more effectively.

[0049] The photographing control unit 101b photographs the iris of a user aboard the vehicle V under a first photographing condition, and then photographs the iris of the user under a second photographing condition. For example, the first photographing condition is set to illuminate the user with light from the ring light Lb so that the user's iris pattern is clearly captured. For the second photographing condition, the light from the ring light Lb is suppressed so that the user experiences less reflection on the corneal surface. Furthermore, the exposure time and ISO value (ISO sensitivity) on the camera Cb side are also adjusted in accordance with changes in the light intensity of the ring light Lb. In other words, the intensity of light shining on the user or the exposure time can be used as the photographing condition.

[0050] Next, the operation of this embodiment will be described in detail with reference to the drawings. FIG. 11 is a flowchart showing the operation of the present disclosure. The difference from the operation of the first embodiment shown in FIG. 7 is that the entire iris is matched in step S202. The authentication device 100b captures an image of the user's pupil under first photographing conditions (step S201). The first photographing conditions are set so that the light from the ring light Lb is shone on the user's iris pattern to clearly capture it. As a result, an iris image such as that shown in FIG. 12 is obtained. However, in the iris image of FIG. 12, a reflection area RA due to the ring light Lb or the like is generated.

[0051] The authentication device 100b performs a match of the entire iris of the user using the image captured under the first photographing conditions (step S202). At this time, the match is performed with a lighter weighting for portions of the user's iris pattern that are missing due to reflection. If there is no match with the iris pattern of a registered user at this point, the subsequent second match may be omitted.

[0052] Next, the authentication device 100b photographs the user's pupils under the second photographing conditions (step S203). Under the second photographing conditions, the light from the ring light L is suppressed, so an iris image such as that shown in Fig. 13 is obtained. This iris image is somewhat blurred overall because the light from the ring light L is suppressed, but an image of the portion corresponding to the missing area RA described above is obtained.

[0053] Next, the authentication device 100 verifies the missing area using the image captured under the second capturing conditions (step S204).

[0054] Finally, the authentication device 100b determines, as a result of the two checks, that the facial image data of the user who boarded the vehicle V matches the facial image data of the user registered in advance (step S005). The subsequent operations are the same as those in the first embodiment, and therefore will not be described again.

[0055] As described above, the present disclosure can also be applied to a configuration in which user authentication is performed by iris authentication.

[0056] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and further modifications, substitutions, and adjustments can be made without departing from the basic technical concept of the present disclosure. For example, the network configurations, element configurations, and data representation formats shown in the drawings are examples intended to aid in understanding the present disclosure, and are not limited to the configurations shown in these drawings.

[0057] For example, in the first and second embodiments described above, the shooting conditions are changed to take into account reflections from eyeglasses, but depending on the location of the moving body (vehicle V), under normal shooting conditions (first shooting conditions), other parts of the face may appear overexposed or underexposed. In such cases, the present disclosure can be applied by setting second shooting conditions that irradiate light more strongly or reduce the amount of light, taking an image, and performing a comparison.

[0058] (Hardware Configuration) In each embodiment of the present disclosure, each component of each device represents a functional unit block. Some or all of the components of each device are realized by an arbitrary combination of an information processing device 900 and a program, for example, as shown in FIG. 14. FIG. 14 is a block diagram showing an example of the hardware configuration of the information processing device 900 that realizes each component of each device. The information processing device 900 includes, as an example, the following configuration: - CPU (Central Processing Unit) 901 - ROM (Read Only Memory) 902 - RAM (Random Access Memory) 903 - Program 904 loaded into RAM 903 - Storage device 905 that stores the program 904 - Drive device 907 that reads and writes to a recording medium 906 - Communication interface 908 that connects to a communication network 909 - Input / output interface 910 that inputs and outputs data - Bus 911 that connects each component

[0059] Each component of each device in each embodiment is realized by the CPU 901 acquiring and executing a program 904 that realizes these functions. That is, the CPU 901 in FIG. 14 executes an automatic photography program and an image matching program, and performs an update process for each calculation parameter stored in the RAM 903, storage device 905, etc. The program 904 that realizes the function of each component of each device is stored in the storage device 905 or ROM 902 in advance, for example, and is read out by the CPU 901 as needed. The program 904 may be supplied to the CPU 901 via the communication network 909, or may be stored in advance on the recording medium 906, and the drive device 907 may read out the program and supply it to the CPU 901.

[0060] There are various variations in the method of realizing each device. For example, each device may be realized by any combination of a separate information processing device 900 and a program for each component. Furthermore, multiple components provided in each device may be realized by any combination of a single information processing device 900 and a program. In other words, each unit (processing means, function) of the authentication device shown in the first to third embodiments can be realized by a computer program that causes a processor installed in the device to execute each of the above-mentioned processes using its hardware.

[0061] In addition, some or all of the components of each device may be realized by other general-purpose or dedicated circuits, processors, etc., or a combination of these. These may be configured by a single chip, or by multiple chips connected via a bus.

[0062] Some or all of the components of each device may be realized by a combination of the above-mentioned circuits and programs.

[0063] When some or all of the components of each device are realized by multiple information processing devices, circuits, etc., the multiple information processing devices, circuits, etc. may be centrally or decentralized. For example, the information processing devices, circuits, etc. may be realized as a client-server system, a cloud computing system, or the like, in a form in which each device is connected via a communication network.

[0064] It should be noted that the above-described embodiments are preferred embodiments of the present disclosure, and the scope of the present disclosure is not limited to only the above-described embodiments. In other words, those skilled in the art can modify or substitute the above-described embodiments to construct various modified forms without departing from the gist of the present disclosure.

[0065] A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes.

[0066] [Supplementary Note 1] An authentication device comprising: an imaging control means for capturing a plurality of images of a user on a moving object under different imaging conditions; and a matching means for performing a first matching of a first region of the user's biometric information using an image captured under a first imaging condition among the plurality of images, and performing a second matching of a second region of the user's biometric information, different from the first region, using an image captured under a second imaging condition. [Supplementary Note 2] The imaging conditions of the authentication device may be the intensity of light irradiated on the user and exposure time. The authentication device of claim 1. [Supplementary Note 3] The authentication device may be configured to change the imaging conditions if the user is wearing eyeglasses. The authentication device of claim 1. [Supplementary Note 4] In the authentication device, the first region may be the entire face of a user wearing eyeglasses, and the second region may be a portion captured through the eyeglasses of the user wearing eyeglasses. The authentication device of claim 1. [Supplementary Note 5] In the above authentication device, the first and second parts are the irises of a user, the first photographing conditions are photographing conditions for photographing an iris pattern without taking specular reflection into consideration, and the second photographing conditions are photographing conditions for suppressing the specular reflection. [Supplementary Note 6] A vehicle equipped with the above authentication device. [Supplementary Note 7] An authentication method comprising: photographing a plurality of images of a user riding on a moving object under different photographing conditions; performing a first comparison of an image photographed under a first photographing condition among the plurality of images with a first part of biometric information of the user; and performing a second comparison of an image photographed under a second photographing condition with a second part of the biometric information of the user that is different from the first part. [Supplementary Note 8] A recording medium having recorded thereon a program that causes a computer to execute the following processes: a process of taking a plurality of images of a user on a moving object under different shooting conditions; and a process of performing a first comparison of an image taken under a first shooting condition among the plurality of images with a first part of the biometric information of the user, and a second comparison of an image taken under a second shooting condition with a second part of the biometric information of the user that is different from the first part.The embodiments described in the above Supplements can be combined with each other after making necessary modifications. For example, a configuration that combines the contents of Supplementary Note 2 and Supplementary Note 3, changes the shooting conditions when the user is wearing glasses, and changes the light intensity and exposure time as the shooting conditions, is also included in the scope of disclosure of this specification. The embodiments of Supplements 7 and 8 can be expanded into the embodiments of Supplements 2 to 5, just like Supplementary Note 1.

[0067] The disclosures of the above-cited patent documents are incorporated herein by reference and may be used as the basis or part of this disclosure, as necessary. Modifications and adjustments of the embodiments and examples are possible within the scope of this disclosure (including the claims), and further based on its basic technical concept. Furthermore, various combinations and selections (including partial deletions) of various disclosed elements (including elements of each claim, each element of each embodiment or example, each element of each drawing, etc.) are possible within the scope of this disclosure. In other words, this disclosure naturally includes various modifications and alterations that would be possible by a person skilled in the art in accordance with the entire disclosure, including the claims, and the technical concept. In particular, with regard to the numerical ranges described herein, any numerical value or subrange within that range should be construed as specifically described, even if not otherwise specified. Furthermore, the disclosures of the above-cited documents, when used in part or in whole in combination with the disclosures herein as part of this disclosure, in accordance with the spirit of this disclosure, are also deemed to be included in the disclosures of this application.

[0068] REFERENCE SIGNS LIST 10, 100, 100a, 100b Authentication device 11 Photography control means 12 Verification means 101, 101b Photography control unit 102, 102a Verification unit 103 Authentication information storage unit 1021 Object detection unit 900 Information processing device 901 CPU (Central Processing Unit) 902 ROM (Read Only Memory) 903 RAM (Random Access Memory) 904 Program 905 Storage device 906 Recording medium 907 Drive device 908 Communication interface 909 Communication network 910 Input / output interface 911 Bus C, Cb Camera L Ring light RA Missing area TP Person to be authenticated V Vehicle

Claims

1. An authentication device comprising: an image capture control means for capturing multiple images of a user on a moving object under different image capture conditions; and a matching means for performing a first matching of a first part of the user's biometric information using an image captured under a first image capture condition among the multiple images, and performing a second matching of a second part of the user's biometric information that is different from the first part using an image captured under a second image capture condition.

2. The authentication device according to claim 1, wherein the photographing conditions are the intensity of light shining on the user and exposure time.

3. The authentication device according to claim 1 or 2, wherein the photographing conditions are changed when the user is wearing glasses.

4. An authentication device according to any one of claims 1 to 3, wherein the first region is the entire face of a user wearing glasses, and the second region is the portion of the user wearing glasses photographed through the glasses.

5. An authentication device according to any one of claims 1 to 3, wherein the first and second parts are the user's irises, the first photographing conditions are photographing conditions for photographing an iris pattern without taking specular reflection into consideration, and the second photographing conditions are photographing conditions for suppressing the specular reflection.

6. A vehicle equipped with an authentication device according to any one of claims 1 to 5.

7. An authentication method comprising: taking a plurality of images of a user on a moving object under different photographing conditions; performing a first comparison of an image taken under a first photographing condition with a first part of the user's biometric information among the plurality of images; and performing a second comparison of an image taken under a second photographing condition with a second part of the user's biometric information that is different from the first part.

8. A recording medium having recorded thereon a program that causes a computer to execute the following processes: a process of taking multiple images of a user on a moving object under different shooting conditions; a process of performing a first comparison of an image taken under a first shooting condition with a first part of the user's biometric information among the multiple images; and a process of performing a second comparison of an image taken under a second shooting condition with a second part of the user's biometric information that is different from the first part.

Images