JP7125626B2 - Information processing equipment - Google Patents

Description

An embodiment of the present invention relates to an information processing apparatus.

2. Description of the Related Art Conventionally, an information processing apparatus having an iris authentication function of determining whether or not a person is an authorized user by performing iris authentication of a person's eyes has been put into practical use. Iris authentication utilizes the fact that each person has a different iris pattern, and by comparing the iris pattern of the person to be authenticated with a pre-registered iris pattern, it is possible to determine whether the user is a registered user. However, there are cases where fraudulent authentication is performed using a forged iris. For example, an authorized user's iris pattern may be illegally photographed, and the photographed image may be authenticated by holding the photographed image over an authentication unit (imaging unit or the like). Therefore, there has been proposed an authentication device that determines whether the iris is a fake iris or a living iris by using the contraction change of the pupil that occurs when the eye is exposed to strong light. In other words, if strong light is applied to the eyes during authentication and the pupils contract, it is determined that the "eyes" facing the authentication unit are living organisms, and if they do not contract, the eyes are forged (fake irises). This improves security.

JP-A-2003-30659

However, in the case of the conventional configuration, it is necessary to provide a dedicated light source for irradiating the face (eyes) of a person who intends to use the information processing apparatus with strong light in order to cause the phenomenon of pupil constriction. Thus, providing a light source that emits strong light only for the purpose of detecting a counterfeit iris causes a decrease in the degree of freedom in designing the information processing device, an increase in cost, and a deterioration in the design of the information processing device. There is a problem that

Therefore, one example of the problem to be solved by the present invention is that it is possible to cause a constriction reaction of the pupil without reducing the degree of design freedom, increasing the cost, or deteriorating the designability (detection of a fake iris is possible). The object is to provide an information processing device capable of

An information processing apparatus according to a first aspect of the present invention includes: a display unit arranged on a surface of a housing and capable of adjusting brightness; and a display unit arranged on the same surface of the housing as the display unit and facing the display unit. an image capturing unit capable of capturing an image of the eyes of a person to be authenticated; a first brightness state in which the brightness of the display unit is a predetermined low brightness; and a second brightness state in which the brightness is temporarily higher than the first brightness state. a display switching unit for switching to a luminance state; a first image obtained by imaging the eye with the imaging unit when an image is displayed on the display unit in the first luminance state; and the second luminance. comparing the second image obtained by imaging the eye with the imaging unit when the display content of the display unit in the state is solid white, and using the iris based on the contraction change of the pupil of the eye; and a control unit that performs authentication processing.

According to the above aspect of the present invention, by temporarily increasing the brightness of the display unit that can be normally installed in an information processing apparatus, strong light that causes a change in contraction of the pupils of the person to be authenticated is emitted to cause pupil constriction. Detects the presence or absence of Therefore, there is no need to provide a dedicated light source for contracting and changing the pupil, that is, for detecting a false iris. As a result, it is possible to obtain an information processing apparatus capable of suppressing a reduction in the degree of freedom of design, an increase in cost, and a deterioration in designability due to installation of a dedicated light source.

FIG. 1 is an exemplary schematic plan view for explaining the appearance of an information processing apparatus according to an embodiment. 2A and 2B are exemplary and schematic diagrams for explaining changes in contraction of a pupil due to switching of brightness of a display unit in the information processing apparatus according to the embodiment; FIG. FIG. 3 is an exemplary schematic block diagram illustrating the configuration of the information processing apparatus according to the embodiment; 4A and 4B are exemplary and schematic diagrams for explaining transition of luminance of the display unit of the information processing apparatus according to the embodiment. FIG. 5 is an exemplary flowchart showing a flow of processing including eye forgery determination processing of the information processing apparatus according to the embodiment. FIG. 6 is an exemplary schematic diagram showing a register as an application system using the information processing device according to the embodiment. FIG. 7 is an exemplary schematic diagram showing a cash dispenser as another application system using the information processing apparatus according to the embodiment.

Illustrative embodiments of the invention are disclosed below. The configurations of the embodiments shown below and the actions, results, and effects brought about by the configurations are examples. The present invention can be realized by configurations other than those disclosed in the following embodiments, and at least one of various effects based on the basic configuration and derivative effects can be obtained. .

FIG. 1 is an exemplary and schematic plan view for explaining the appearance of an information processing apparatus 10 according to an embodiment.

The information processing apparatus 10 of the present embodiment performs iris authentication prior to use of the information processing apparatus 10, so that a person who intends to use the information processing apparatus 10 is registered in advance (permitted to use the information processing apparatus 10). It has an authentication function that determines whether the user is authorized or not. Further, the information processing apparatus 10 of this embodiment has a function of confirming that the iris (eye) is not forged. The human iris has a different pattern for each person, so it can be used as a target for biometric authentication. However, when performing authentication, the iris is photographed and compared with the pre-registered iris pattern of an authorized user, so a forged iris (for example, an authorized user's iris obtained by illegally photographing it and forging it) iris image, etc.) may be used to commit fraud.

Therefore, the information processing apparatus 10 of the present embodiment determines whether or not the iris (eye) is forged by using the fact that the pupil constricts when the surroundings become bright. In other words, if the iris (eye) is a living organism, the pupil contracts when exposed to strong light. On the other hand, if the iris (eye) is forged, the pupil does not contract even when exposed to strong light. The information processing apparatus 10 uses the back of the display unit 14 incorporated in the housing 12 as a strong light source used for determining whether or not the iris is a fake (determining whether or not the pupil changes due to light). Use lights.

The information processing apparatus 10 shown in FIG. 1 is, for example, a mobile terminal, and a display unit 14 is arranged using most of the surface area of the housing 12 . The surface of the display unit 14 is covered with a transparent operation input unit 16 . An imaging unit 18 is arranged in the frame portion 12 a of the housing 12 . The imaging unit 18 is composed of a first imaging section 20a as a near-infrared imaging unit 20 for imaging a near-infrared image, a near-infrared irradiation section 20b for irradiating near-infrared rays, and a second imaging section 22 for imaging a visible light image. ing.

The housing 12 is made of metal or resin and has, for example, a thin box shape with a bottom. there is A processing unit, which will be described later, is accommodated inside the housing 12 .

The display unit 14 is, for example, an LCD (Liquid Crystal Display), an OELD (Organic ElectroLuminescent Display), or the like. The transparent operation input unit 16 is, for example, a touch panel or the like, and the user (authorized user) of the information processing apparatus 10 can visually recognize an image displayed on the display unit 14 via the operation input unit 16. can. Further, the user can perform an operation input by touching, pressing, or moving the operation input unit 16 with a finger or the like at a position corresponding to the image displayed on the display unit 14 .

A near-infrared image capturing unit 20 constituting the image capturing unit 18 captures a near-infrared image of the iris when performing iris authentication and a near-infrared image of the pupil when determining whether or not it is a fake iris. Further, the second imaging unit 22 constituting the imaging unit 18 is used for detecting whether or not the surrounding brightness is suitable for iris authentication when performing general visible light image capturing and iris authentication. A visible light image is taken.

The first imaging unit 20a and the second imaging unit 22 are digital cameras incorporating imaging elements such as CCDs (Charge Coupled Devices) and CISs (CMOS Image Sensors). The first imaging unit 20a and the second imaging unit 22 can output moving image data (captured image data, image information) at a predetermined frame rate.

The first imaging unit 20a includes a filter that cuts visible light, and captures an image in the near-infrared region with a wavelength range of 780 nm to 2500 nm, for example. The first imaging unit 20a emits near-infrared light emitted by the near-infrared irradiation unit 20b to an object, in this case, a person holding the information processing device 10 (mainly looking into the display unit 14, the display unit 14). An image based on near-infrared light reflected by the face of a person facing the person is captured. The first imaging unit 20a performs imaging only when mainly performing iris authentication (including imaging for confirmation of pupil constriction). Therefore, the near-infrared irradiation unit 20b also irradiates near-infrared light at the timing when the first imaging unit 20a performs imaging.

On the other hand, the second imaging section 22 has a filter that cuts off the infrared light region, and captures a visible light image. The second imaging unit 22 is mainly used when the information processing apparatus 10 completes the authentication of the authorized user, and then, based on the user's operation, takes a visible light image of, for example, a person or landscape. . Further, as described above, prior to the information processing apparatus 10 performing iris authentication, the brightness of the surroundings is indicated in order to determine whether the brightness of the surroundings is suitable for iris authentication. A visible light image can be captured regardless of a user's operation.

2A and 2B are exemplary and schematic diagrams for explaining changes in contraction of the pupil due to switching of the brightness of the display unit 14 in the information processing apparatus 10. FIG.

As is well known, the eye E of a human P (living body) enlarges (enlarges) the pupil E2 in the center of the iris E1 in order to collect more light when the surrounding brightness is low. Conversely, when the surroundings become brighter than the current state, the pupil E2 is constricted (smaller) in an attempt to limit the amount of light entering through the pupil E2.

For example, as shown in scene S1 in FIG. 2, when the brightness of the backlight of the display unit 14 of the information processing device 10 is low or when the backlight is turned off, the user looks into the display unit 14 of the information processing device 10. The eye E of the human P opens its pupil E2 widely as shown in the scene S1a. On the other hand, as shown in scene S2, when the brightness of the backlight of the display unit 14 of the information processing device 10 is increased and the eye E of the human P is included in the irradiation range L, the pupil E2 shrinks and becomes smaller. That is, before and after the luminance change of the display unit 14, the eye E is imaged by the first imaging unit 20a, and when the captured images before and after are compared, the change in the pupil E2 (contraction when the luminance is increased, or ), it can be estimated that the imaged eye E is a living organism. As a result, it can be determined that iris authentication is being performed in vivo.

As in scene S2a, the pupil E2 contracts due to the high-luminance light emission of the display unit 14. As a result, the area of the iris E1 becomes larger than in the case where the pupil E2 does not contract as in scene S1a. In other words, the range in which the iris pattern to be compared when performing iris authentication is present is widened. As a result, the system of iris authentication can be improved.

FIG. 3 is an exemplary and schematic block diagram for explaining the configuration of the information processing device 10. As shown in FIG. As described above, the information processing apparatus 10 includes the display section 14 and the imaging unit 18 as shown in FIG. Further, the information processing apparatus 10 includes, as a processing unit, a CPU (Central Processing Unit) 24, a ROM (Read Only Memory) 26, a RAM (Random Access Memory) 28, an SSD (Solid State Drive) 30 and a flash memory. etc., and an interface 32 for communication and input/output.

The display unit 14 includes an information display unit 14a, a backlight unit 14b, an operation input unit 16, and the like. The information display unit 14a is an LCD, an OELD, or the like, as described above, and displays various image information under the control of the CPU 24. FIG. The backlight unit 14b may have an edge light type structure or a direct type type structure. In any structure, the luminance can be adjusted by using a well-known technique and by varying the current or voltage. Further, as described above, the transparent operation input section 16 is arranged on the upper surface of the information display section 14a, and can transmit an image displayed on the information display section 14a. Therefore, by operating the operation input unit 16 by touching, pushing, or moving it with a finger or the like at a position corresponding to the image displayed on the information display unit 14a, the operation input is accepted and the information is provided to the CPU 24. , causing the CPU 24 to execute various processes in accordance with the input operation.

The CPU 24 functions as a control unit in this embodiment, reads a program installed and stored in a non-volatile storage device such as the ROM 26, and can execute arithmetic processing according to the program. The CPU 24, for example, controls the imaging unit 18 and the display unit 14, and implements authentication processing, display processing after authentication, communication processing, and the like.

The ROM 26 stores various programs and parameters necessary for executing the programs. The RAM 28 temporarily stores various data used in calculations by the CPU 24 . The SSD 30 is a rewritable non-volatile storage unit, and continues to store data acquired from the CPU 24 even when the power of the information processing apparatus 10 is turned off. The CPU 24, ROM 26, RAM 28, etc. can be integrated in the same package. Also, an HDD (Hard Disk Drive) may be provided instead of the SSD 30 .

The CPU 24 realizes various detailed modules by executing programs stored in the ROM 26 in order to control the imaging unit 18, control the display section 14, pupil determination processing, authentication processing, and the like. Detailed modules implemented by the CPU 24 include, for example, a near-infrared irradiation control unit 34, a first imaging control unit 36, a second imaging control unit 38, a pupil comparison unit 40, an authentication unit 42, a display switching unit 44, and an information display control unit. 46 and the like.

The near-infrared irradiation control unit 34 starts light emission of the near-infrared irradiation unit 20b (for example, an infrared LED) at the timing of capturing the near-infrared image by the first imaging unit 20a or at a timing a predetermined period before that, and continues for a predetermined period. Control to turn off the light after the passage of time.

The first image capturing control unit 36 captures a near-infrared image for the first time before the information processing apparatus 10 is activated, and captures a near-infrared image for the second time after the luminance of the display unit 14 is increased. For example, when the information processing device 10 is in a sleep state, the first near-infrared image is captured based on the detection result of an acceleration sensor or the like incorporated in the information processing device 10 when the information processing device 10 is lifted or displayed. Executed when part 14 is considered to be turned face up. In addition, the second near-infrared image is captured after a predetermined period of time has elapsed after the brightness of the display unit 14 has been increased after the first capturing (after the time has elapsed in consideration of the delay in contraction reaction of the pupil E2). is executed. Note that the first imaging control unit 36 may continuously capture a moving image from the imaging timing of the first near-infrared image to acquire the second near-infrared image.

The second imaging control unit 38 causes the second imaging unit 22 to capture a visible light image based on the operation of the operation input unit 16 after the information processing apparatus 10 is activated (after the authorized user is authenticated). Also, the second imaging control unit 38 performs various settings for imaging a visible light image, such as exposure, shutter speed, and imaging mode settings. Further, when iris authentication is performed using a near-infrared image captured by the first imaging unit 20a, the probability of authentication failure (authentication accuracy being lowered) increases when the surrounding brightness is brighter than a predetermined brightness. It has been known. Therefore, the second image capturing control unit 38 captures a visible light image indicating the brightness of the surroundings where the information processing device 10 exists prior to executing the authentication process. If the brightness around the information processing apparatus 10 is not suitable for iris authentication, that is, if it is too bright, the iris authentication processing by the authentication unit 42, the forgery determination by the pupil comparison unit 40 to confirm the contraction of the pupil E2, etc. can be made non-executable. In this case, the information processing apparatus 10 may execute other authentication processing such as fingerprint authentication processing, voiceprint authentication processing, and authentication processing by inputting a passcode.

Under the control of the first imaging control unit 36, the pupil comparison unit 40 compares a near-infrared image (first image) captured by the first imaging unit 20a for the first time and a near-infrared image (second image) captured for the second time by the first imaging unit 20a. image), and it is determined whether or not the size of the pupil E2 has changed. Note that the first image is an image captured when the luminance of the backlight portion 14b of the display portion 14 has a value corresponding to the brightness of the surroundings of the information processing device 10, and the second image is This image is taken when the brightness of the display unit 14 is intentionally increased for the purpose of forgery determination. As a result of comparing the first image and the second image using a technique such as image analysis, the pupil comparison unit 40 determines that the size of the pupil E2 of the second image is larger than the size of the pupil E2 of the first image. If the eye E has shrunk (becomes smaller) than a predetermined determination threshold value, it is determined that the imaged eye E to be authenticated is a living body, and the authentication unit 42 is notified of the result. Similarly, when the size of the pupil E2 of the second image and the size of the pupil E2 of the first image do not change (substantially the same), it is determined that the imaged eye E to be authenticated is forged, The authentication unit 42 is notified of the result.

The authentication unit 42 executes iris authentication processing when it receives from the pupil comparison unit 40 a notification that the eye E (pupil E2) to be authenticated is not a forgery but a living body. A well-known technique can be used for the iris authentication processing, and detailed description thereof will be omitted. is successively compared with the pattern of the pupil E2, and if the degree of matching is equal to or greater than a predetermined threshold value, it is determined that the authentication is successful. When the authentication is successful, the CPU 24 can execute the process of starting the information processing device 10 .

The display switching unit 44 switches the brightness of the backlight unit 14b. For example, switching is made between a first brightness state that is a predetermined low brightness and a second brightness state that is temporarily higher than the first brightness state.

FIG. 4 is an exemplary and schematic diagram illustrating transition S of luminance of the display unit 14 (backlight unit 14b) by the display switching unit 44 when the information processing apparatus 10 executes the forgery determination process.

As shown in FIG. 4, the brightness of the backlight unit 14b when executing the forgery determination process is the reference brightness state S0 (scene S0), the first brightness state S1 (scene S1), and the second brightness state S2 (scene S1). Transition between scenes S2).

The reference luminance state S0 is the luminance determined according to the ambient brightness, and is the luminance determined in advance by, for example, a test or the like according to the ambient brightness so that the image displayed by the display unit 14 can be easily seen. be. For example, when the surroundings are dark, if the backlight section 14b of the display section 14 is too bright compared to the brightness of the surroundings, the images become difficult to see and the user who views the images tends to get fatigued. Therefore, the backlight unit 14b is set to a dark luminance. On the other hand, when the surroundings are bright, if the backlight portion 14b of the display unit 14 is darker than the surrounding brightness, the contrast of the image is difficult to obtain, and the visibility is lowered. Therefore, the backlight unit 14b is set to a bright luminance. By setting the brightness of the backlight portion 14b according to the ambient brightness, the visibility of the content H1, icons, etc. displayed on the information display portion 14a can be maintained at a certain level or higher.

The first luminance state S1 is a luminance state when the first imaging unit 20a captures a near-infrared image (first image) for the first time, and is a predetermined low luminance state darker than the reference luminance state S0. be. As shown in FIG. 4, the low brightness of the backlight section 14b makes the entire information display section 14a dark and reduces the visibility of the displayed content H1, icons, and the like. As a result, the pupil E2, which has contracted to some extent, expands due to the brightness in the reference luminance state S0. In addition, the pupil E2 widens in an attempt to gather more light in order to visually recognize the content H1, icons, etc., which have become difficult to visually recognize. The predetermined low luminance state that is darker than the reference luminance state S0, which is the first luminance state S1, is, for example, 10% of the maximum luminance of the backlight section 14b. It should be noted that this low-luminance state can be selected as appropriate.

The second luminance state S2 is a luminance state when the second near-infrared image (second image) is captured by the first imaging unit 20a, and the luminance is temporarily higher than that of the first luminance state S1. state. Also, at this time, the information display control unit 46 sets the display content of the information display unit 14a to, for example, "plain white". By making the information display section 14a plain, it is possible to emphasize the increase in brightness more than when the content H1, icons, etc. are displayed on the information display section 14a. In addition, by using white as the display color, compared to the case of colors such as red, blue, green, etc., the person viewing the display unit 14 is more likely to feel dazzling. That is, it is possible to more efficiently irradiate the person to be authenticated with the light of the backlight unit 14b switched to high luminance, and make it easier to contract the pupil E2. As a result, it is possible to further improve the accuracy of the forgery determination of the eye E by contraction of the pupil E2. The second luminance state S2 can be, for example, the maximum luminance of the backlight section 14b. Also, in another embodiment, the brightness may be adjusted according to the brightness around the information processing device 10 . For example, if the surroundings are dark, the brightness may be set to 80% of the maximum brightness.

It is not desirable to continue the high luminance second luminance state S2 for a long period of time so as to cause discomfort to the person viewing the display section 14 . Since the human pupil E2 reflexively reacts to changes in light, the high luminance second luminance state S2 can be momentary, for example, on the order of 0.1 seconds. In this way, if it is only for a moment, it is possible to make it difficult for the object to be authenticated to feel discomfort such as glare, and to make it difficult for the object to recognize that the brightness has become high. Therefore, the display switching unit 44 changes the second luminance state S2 of high luminance for a moment, and the information display control unit 46 immediately changes the display content of the information display unit 14a from the state of "plain white" to the content H1, icons, etc. is returned to the state of displaying , and the state is returned to the reference luminance state S0. As a result, it is difficult for a person (person to be authenticated) who intends to use the information processing apparatus 10 to recognize that the iris authentication processing by capturing the near-infrared image and the iris forgery determination processing by high-brightness illumination are being performed. can do.

Returning to FIG. 3, the information display control section 46 controls the display contents of the information display section 14a. For example, as described above, when performing iris forgery determination processing using high-brightness illumination, the display content of the information display unit 14a is switched to, for example, "plain white" to promote high brightness of the backlight unit 14b. do. Further, when the iris authentication process is performed and the authentication is established, the display associated with normal startup of the information processing apparatus 10 and the display based on the user's operation using the operation input unit 16 are performed.

FIG. 5 is an exemplary flowchart showing the flow of processing including the eye E forgery determination processing of the information processing apparatus 10 configured as described above.

As described above, when the information processing apparatus 10 requires authentication processing, for example, when the information processing apparatus 10 is lifted or the display unit 14 is turned up while the information processing apparatus 10 is in a sleep state, this flow is started. . That is, the display switching unit 44 of the CPU 24 records the brightness of the backlight unit 14b in the initial state (the brightness of the backlight unit 14b determined according to the ambient brightness: the reference brightness state S0) in the RAM 28 or the like ( S100).

Subsequently, the display switching unit 44 determines whether or not the brightness of the backlight unit 14b exceeds the first brightness state S1 (for example, 10% of the maximum brightness of the backlight unit 14b) (S102). If it exceeds the first luminance state S1 (Yes in S102), the display switching unit 44 changes the luminance of the backlight unit 14b to the first luminance state S1 (S104). When the luminance is changed in S104, or when the luminance of the backlight unit 14b is equal to or lower than the first luminance state S1 in S102 (No in S102), the first image pickup control unit 36 controls the first image pickup unit 20a. A near-infrared image (first image) of the person to be authenticated is captured for the first time (S106). For example, as in the scene S1a in FIG. 2, a near-infrared image can be captured with the pupil E2 dilated.

Subsequently, the second imaging control unit 38 captures a visible light image around the information processing device 10 using the second imaging unit 22, and the authentication unit 42 detects that the brightness around the information processing device 10 (housing 12) is , is equal to or greater than a predetermined threshold (S108). That is, it is determined whether or not the brightness around the information processing device 10 is suitable for iris authentication. In S108, when the brightness around the information processing apparatus 10 (housing 12) is equal to or higher than the predetermined threshold value (Yes in S108), the iris authentication process is not executed because the accuracy of iris authentication may decrease. A notification process is executed (S110). In this case, the information display control unit 46 displays, on the information display unit 14a, a message or the like indicating that iris authentication cannot be performed because the surroundings are too bright. The message in this case can be, for example, a content that prompts the user to move to the shade and then perform the activation operation (authentication operation) again. Note that in another embodiment, this flow for performing iris authentication may be ended, and other biometric authentication or authentication by inputting a passcode may be prompted.

In S108, when the brightness around the information processing apparatus 10 (housing 12) is less than the predetermined threshold value (No in S108), the information display control unit 46 changes the display content of the information display unit 14a to "plain white". , and the display switching unit 44 temporarily increases the brightness of the operation input unit 16 (for example, for 0.1 seconds) (eg, sets it to the maximum brightness). That is, it is turned on in the second luminance state S2 shown in FIG. 4 to irradiate the person to be authenticated with strong light. Then, the first image capturing control unit 36 captures a second near-infrared image (second image) of the person to be authenticated by the first image capturing unit 20a (S112).

Subsequently, the display switching unit 44 restores the luminance of the backlight unit 14b to the initial state (the reference luminance state S0 according to the ambient brightness) stored in S100 (S114).

Then, the pupil comparison unit 40 compares the first image captured in S106 and the second image captured in S112, and determines whether or not there is constriction of the pupil E2 (S116). It should be noted that the pupil E2 may have a time lag until it actually contracts, even when it reacts with strong light. Therefore, the pupil comparison unit 40 waits for a predetermined period of time (for example, 0.2 seconds after the backlight unit 14b has finished emitting strong light) (No in S118). If a predetermined period of time has passed without any change (contraction) in the pupil E2 (No in S116) (Yes in S118), the pupil comparison unit 40 determines that the imaged eye is a forgery, and continues this flow. It ends once (S120). In other words, the information processing apparatus 10 cannot be activated without performing the iris authentication process.

On the other hand, in S116, if contraction of the pupil E2 at a predetermined ratio or more can be confirmed (Yes in S116), the pupil comparison unit 40 determines that the imaged eye is a living body, and provides the information to the authentication unit 42. . The authentication unit 42 executes the iris authentication process and temporarily ends this flow (S122). In this case, the authentication unit 42, for example, compares the pattern of the iris E1 appearing in the second image captured in S112 with the pattern of the iris E1 of the authorized user pre-registered in the SSD 30 or the like, and performs authentication. Run. If the authentication is successful, the CPU 24 normally activates the information processing device 10 to make it operable.

In this way, by temporarily increasing the brightness of the display unit 14 that is normally installed in the information processing apparatus 10, strong light that causes a contraction change in the pupil E2 of the person to be authenticated is emitted, thereby determining forgery of the eye. It can be performed. Therefore, it is not necessary to provide a dedicated light source for contracting and changing the pupil E2, that is, for detecting a false iris. As a result, it is possible to obtain the information processing apparatus 10 capable of suppressing a reduction in the degree of freedom in design, an increase in cost, and a deterioration in designability due to the installation of the dedicated light source. In addition, for existing information processing devices including the display unit 14 (backlight unit 14b), the near-infrared imaging unit 20, the second imaging unit 22, etc., the eye forgery determination process can be added simply by adding an application. be able to.

Note that the flowchart shown in FIG. 5 shows an example in which the first near-infrared image (first image) is captured in S106, and the second near-infrared image (second image) is captured in S112. rice field. In another embodiment, between the processing of S106 and the processing of S112, a moving image is captured by the first imaging unit 20a as described above. Forgery determination may be performed, and similar effects can be obtained.

FIG. 6 is an exemplary and schematic diagram showing a register M1 (cash register) as an application system using the information processing apparatus 10 described above.

The register M1 includes a large information processing device 10, a cash storage section 48 at the bottom, and a receipt printing device 50 on the side.

In the register M1, the above-described pupil determination processing and iris authentication processing can be executed when the register M1 is activated or each time the register M1 is used. The forgery determination process and the iris authentication process of the eye E are performed by the imaging unit 18 (near-infrared imaging unit 20 (first imaging section 20a, near-infrared irradiation section 20b), second imaging section 20) provided in the frame portion 12a of the housing 12. 22) can be performed in the same manner as the example described above. Also, the cash registration operation can be performed via the operation input unit 16 after authentication.

In the case of the register M1 as well, by changing (temporarily increasing) the brightness of the backlight section 14b of the display section 14, it is possible to detect forgery by the human eye trying to use the register M1 without providing a dedicated light source. can be realized. As a result, it is possible to suppress the decrease in the degree of freedom of design, the increase in cost, and the decrease in designability due to the installation of the dedicated light source, and the security that can realize the forgery determination process of the eye E and the iris authentication process. can obtain a resistor M1 with a high .

FIG. 7 is an exemplary and schematic diagram showing a cash dispenser M2 as another application system using the information processing apparatus 10 described above.

The cash dispenser M2 has a large information processing device 10 in the upper part, a main body display part 52 for cash deposit/withdrawal operations, and a telephone set 54 for making inquiries etc. in the interruption part. In addition, a cash deposit/withdrawal port 56, a keypad 58, and the like are provided on the lower portion.

In the cash dispenser M2, the above-described pupil determination processing and iris authentication processing can be executed each time the cash dispenser M2 is used. The forgery determination process and the iris authentication process of the eye E are performed by the imaging unit 18 (near-infrared imaging unit 20 (first imaging section 20a, near-infrared irradiation section 20b), second imaging section 20) provided in the frame portion 12a of the housing 12. 22) can be performed in the same manner as the example described above. In addition, the display unit 14 can display, for example, a service guide, and can interact with a person in charge at a remote location or a pseudo-person in charge composed of CG (Computer Graphics). Input/output can be performed via the operation input unit 16 at that time.

In the case of the cash dispenser M2 as well, by changing (temporarily increasing) the luminance of the backlight section 14b of the display section 14, the human eye who tries to use the cash dispenser M2 does not need to provide a dedicated light source. Counterfeit determination can be realized. As a result, it is possible to suppress the decrease in the degree of freedom of design, the increase in cost, and the decrease in designability due to the installation of the dedicated light source, and the security that can realize the forgery determination process of the eye E and the iris authentication process. can obtain a cash dispenser M2 with a high .

As described above, according to the information processing apparatus 10 of the present embodiment, the display unit 14 (operation input unit 16) that is arranged on the surface of the housing 12 and whose brightness can be adjusted and the display unit 14 that is the same as the display unit 14 of the housing 12 A first imaging unit 20a (imaging unit 18) arranged on the surface and capable of imaging the eyes of the person to be authenticated facing the display unit 14, and the luminance of the display unit 14 is set to a predetermined low luminance first luminance state. a display switching unit 44 for switching to a second brightness state in which the brightness is temporarily higher than the first brightness state; The obtained first image is compared with the second image obtained by imaging the eye E with the first imaging unit 20a in the second brightness state, and the contraction change of the pupil E2 of the eye E is compared. and a CPU 24 (control unit) that performs authentication processing using the iris E1 based on the above. As a result, by temporarily increasing the luminance of the display unit 14 that is normally installed in the information processing apparatus 10, strong light that causes a contraction change is emitted to the pupil E2 of the person to be authenticated, thereby making it possible to judge forgery of the eye. It can be carried out. Therefore, it is not necessary to provide a dedicated light source for contracting and changing the pupil E2, that is, for detecting a false iris. As a result, it is possible to obtain the information processing apparatus 10 capable of suppressing a reduction in the degree of freedom in design, an increase in cost, and a deterioration in designability due to the installation of the dedicated light source.

Further, the display switching unit 44 of the information processing apparatus 10 of the present embodiment may switch the display content of the display unit 14 to plain white to switch to the second luminance state. According to this configuration, it is possible to more efficiently irradiate the person to be authenticated with the light of the backlight unit 14b switched to high luminance, and encourage the contraction of the pupil E2. As a result, the accuracy of the forgery determination of the eye E can be further improved.

The CPU 24 (control unit, authentication unit 42) of the information processing apparatus 10 of the present embodiment may not execute authentication processing when the brightness around the housing 12 is equal to or higher than a predetermined threshold. According to this configuration, it is possible to omit processing when authentication accuracy cannot be expected, and reduce the load on the CPU 24 .

The CPU 24 (control unit, authentication unit 42) of the information processing apparatus 10 of the present embodiment executes a notification process for notifying that the authentication process is not executed due to the brightness of the surroundings when the authentication process is not executed. You may According to this configuration, it is possible to make the person to be authenticated quickly recognize the cause of the failure of authentication, thereby speeding up the startup process of the information processing apparatus 10 and contributing to improvement in usability. Also, by switching to another authentication method, security can be kept constant.

The imaging unit 18 of the information processing apparatus 10 of the present embodiment includes a first imaging unit 20a capable of capturing an infrared image of the eye E, a second imaging unit 22 capable of capturing a visible light image around the housing 12, may be provided. According to this configuration, highly accurate iris authentication processing and eye E forgery determination processing can be performed by the first imaging unit 20a. In the above-described embodiment, an example of performing iris authentication processing and eye E forgery determination processing using a near-infrared image captured by the first imaging unit 20a has been described. In another embodiment, the iris authentication process and the eye E forgery determination process may be performed using a visible light image captured by the second imaging unit 22 . In this case, the near-infrared imaging unit 20 can be omitted, contributing to cost reduction.

In addition, in the above-described embodiment, a mobile terminal is shown as the information processing device 10, but an information processing device having an iris authentication function and a display unit whose brightness can be changed can be used for similar temporary high-intensity light emission. It is possible to perform eye forgery determination processing. For example, it can be applied to notebook-type and desktop-type personal computers, and similar effects can be obtained. Also, the above-described technology can be applied to an iris authentication dedicated device installed at a doorway or used together with other systems, and the same effects can be obtained.

Although the embodiment of the present invention has been illustrated above, the above embodiment is an example and is not intended to limit the scope of the invention. The above embodiments can be implemented in various other forms, and various omissions, replacements, combinations, and modifications can be made without departing from the scope of the invention. In addition, specifications such as each configuration and shape (structure, type, direction, format, size, length, width, thickness, height, number, arrangement, position, material, etc.) may be changed as appropriate. can be implemented.

DESCRIPTION OF SYMBOLS 10... Information processing apparatus, 12... Housing, 14... Display part, 14a... Information display part, 14b... Backlight part, 18... Imaging unit, 20... Near-infrared imaging unit, 20a... First imaging part, 20b... Near Infrared irradiation unit 22 Second imaging unit 24 CPU (control unit) 26 ROM 34 Near-infrared irradiation control unit 36 First imaging control unit 38 Second imaging control unit 40 Pupil Comparison unit 42... Authentication unit 44... Display switching unit 46... Information display control unit E... Eye E1... Iris E2... Pupil.

Claims (4)

A display unit that is arranged on the surface of the housing and whose brightness can be adjusted,
an imaging unit arranged on the same surface as the display unit of the housing and capable of imaging the eyes of an authentication subject facing the display unit;
a display switching unit that switches the brightness of the display unit between a first brightness state that is a predetermined low brightness and a second brightness state that is temporarily higher than the first brightness state;
a first image obtained by capturing an image of the eye with the imaging unit when an image is displayed on the display unit in the first luminance state , and a display content of the display unit in the second luminance state; a control unit that compares a second image obtained by imaging the eye with the imaging unit when the image is solid white, and performs authentication processing using the iris based on changes in contraction of the pupil of the eye;
An information processing device. 2. The information processing apparatus according to claim 1 , wherein said control unit does not execute said authentication processing when brightness around said housing is equal to or greater than a predetermined threshold. 3. The information processing apparatus according to claim 2 , wherein, when said authentication processing is not executed, said control unit executes notification processing for notifying that said authentication processing is not executed due to ambient brightness. 1 to 3, wherein the imaging unit includes a first imaging unit capable of capturing an infrared image of the eye, and a second imaging unit capable of capturing a visible light image around the housing . 4. The information processing device according to any one of 3 .

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