KR102567390B1 - Apparatus and Method for Recognizing Fake Iris By Detecting Movements of the Pupil of User's Eye - Google Patents

Abstract

Disclosed is a fake iris discrimination device and method using pupil movement. The fake iris detection device of the present invention checks whether there is a movement and size change of the user's pupil within a predetermined time, and if both movement and size change of the pupil are recognized, the iris being attempted for authentication is determined as a living body.

Description

Apparatus and Method for Recognizing Fake Iris By Detecting Movements of the Pupil of User's Eye}

The present invention relates to a biometric recognition-related technology using an iris, and relates to a fake iris discrimination device and method capable of determining whether or not a fake iris is present by detecting a movement of a user's pupil.

Looking at the human eye, the pupil and the sclera surrounding the pupil are visible, and the pupil is again divided into the pupil and the iris surrounding the pupil. Among them, the iris is the most complex and sophisticated fibrous tissue in the human body as a tissue that forms the pupil of an animal by surrounding the pupil. Iris patterns are all different for each person, and since the patterns of the iris of the left and right eyes of the same person are different from each other, the iris is used as a personal authentication means. Like fingerprints, patterns on the iris do not change with age.

Iris recognition is a method of photographing an iris with a camera and comparing features of the iris part. On the other hand, since personal authentication is mainly used in areas where security is important, such as access control, e-commerce, financial transactions, personal computer (PC) security and office payment system, etc., fake iris rather than the registered user (Hereinafter referred to as 'false iris') is more important than anything else.

Until recently, it has been recognized that it is almost impossible not only to obtain an iris image of a specific person separately, but also to create a fake iris because it is not easy. Nevertheless, counterfeit irises, such as paper printed with an iris image by a high-performance printer, a mobile device displaying an iris image on a screen, or a prosthetic eye printed with an iris image, have been discovered. When a fake iris is input to a conventional iris recognition device, the device may process it as if it is a living iris while performing the same process of obtaining an iris image and extracting feature points.

The applicant is researching various methods to determine whether or not it is a fake iris in iris authentication, and has applied for Korean Patent Publication No. 10-2020-0079989 (Apparatus and Method for Identifying Fake Iris Using Feature Point Variation). According to this method, if there is a change in the position of a feature point of the iris in a continuously photographed image of the iris of a user subject to authentication or a feature point of the iris is not detected, a method of determining the iris under authentication request as a living body is proposed. .

In this method, the user may be requested to change the position of the iris or at least one operation to make the iris invisible, if necessary, and these processes are parts that users feel uncomfortable about iris authentication. In addition, the fact that it may take a certain amount of time to recognize the change in position of the feature point of the iris is also an area that can be improved.

1. KR 10-2020-0079989 (Apparatus and method for discriminating fake iris using feature point change)

An object of the present invention is to provide a fake iris discrimination device and method capable of determining whether a fake iris is present by detecting a movement of a user's pupil, as a technology related to biometrics using an iris.

In order to achieve the above object, a method for determining a fake iris according to the present invention includes generating a fake iris detection image by photographing a user at a first frame rate by a camera unit; measuring, by a forgery determination unit, pupil coordinates and pupil sizes of the user's eyes in the forgery determination image; Determining that the iris being attempted for authentication is a forgery when at least one of the movement and size change of the pupil is not confirmed by the counterfeit determination unit while the steps of generating and measuring the image for counterfeit determination are repeated a predetermined plurality of times. and; While the steps of generating and measuring the image for counterfeit determination are repeated a plurality of predetermined times, when the counterfeit determination unit recognizes both the movement and size change of the pupil, determining the iris under authentication attempt as a living body. include

According to an embodiment, the checking may include: extracting pupil information from the forgery-determining image by the forgery-determining unit whenever the camera unit generates the forgery-determining image at the first frame rate; Determining that there is movement of the pupil when the position of the central point of the pupil is different from previously measured, and determining that there is a change in size of the pupil when the maximum diameter of the pupil is different from previously measured. includes Here, the pupil information is the coordinates of the central point and the maximum diameter of the pupil in the forgery discrimination image.

According to another embodiment, the fake iris discrimination method according to the present invention includes the steps of generating and measuring the fake iris if the step of determining the iris as a living body has been performed before repeating the predetermined plurality of times. You can stop without repeating further.

Initiation of forgery judgment by user recognition

According to another embodiment, a method for determining a fake iris according to the present invention includes generating an image for user recognition by photographing a front of the camera unit to recognize a user attempting iris authentication; The method may further include confirming that there is a user authentication attempt when the user recognition unit recognizes the pupil, iris, and sclera of the user's eye for which iris authentication is attempted in the user recognition image. In this case, the generating of the forgery detection image starts when the authentication attempt is confirmed.

According to another embodiment, a method for determining a fake iris according to the present invention includes the steps of, by the forgery determining unit, storing a position of a user's eye in the image for user recognition as a reference position; The method may further include determining whether the position of the user's eyes in the forgery determination image is different from the reference position. In this case, when the position of the user's eye is different from the reference position, the step of determining the forgery and the step of determining the living body may not be performed.

Feature point extraction in case of biometric authentication

According to another embodiment, a method for determining a fake iris according to the present invention includes extracting, by a feature point extraction unit, a feature point of an iris from the forgery determination image for iris authentication when the forgery determination unit determines the iris as a living body. may further include.

fake iris detection device

The present invention also extends to a fake iris discrimination device. The fake iris determination device of the present invention includes a camera unit and a counterfeit determination unit. The camera unit photographs the user at a first frame rate to generate an image for counterfeit determination, and the counterfeit determination unit receives the forgery determination image from the camera unit a plurality of predetermined times and measures the coordinates of the pupils of the user's eyes and the size of the pupils. By performing image processing to determine whether the iris of the user attempting authentication is a living body or a forgery. If at least one of the movement and size change of the pupil is not confirmed while the image processing is repeated a predetermined number of times, the forgery determination unit determines that the iris being attempted for authentication is forged, and recognizes both the movement and size change of the pupil. If so, the iris under authentication attempt is determined as a living body.

The device for detecting a fake iris according to the present invention can determine whether a user has a fake iris by detecting the movement and size change of the user's pupil.

Above all, if it is a pupil of a living body that is not a fake, at least the change of the pupil for determining the fake iris proposed by the present invention must occur within a predetermined time, so that the user who attempts iris authentication according to the present invention can determine the location of the iris There is no need to request actions such as changing the color of the iris or making the iris invisible.

Of course, the method for determining fake iris of the present invention does not dazzle the user or cause discomfort to the user because there is no need to illuminate the user attempting authentication to blink. In addition, the fake iris detection method of the present invention has a very simple structure because it does not use a separate hardware device to determine the fake iris.

Above all, since image processing to the extent of capturing the movement of the pupil is very simple compared to extracting iris feature points or tracking changes in the feature points, software for detecting forgery can be implemented very simply. Naturally, when a user attempts iris authentication, forgery determination can be made in a very short time required to acquire several images.

1 is a block diagram of a device for determining a fake iris according to the present invention;
Figure 2 is a flow chart provided to explain the fake iris discrimination method of the present invention;
3 is a flowchart provided to explain a method for identifying a fake iris according to another embodiment of the present invention;
Figure 4 is an image showing the eye part for explanation of the counterfeit determination method, and
5 is a block diagram of an apparatus for determining a fake iris according to another embodiment of the present invention.

The present invention will be described in more detail with reference to the following drawings.

Referring to FIG. 1 , the fake iris determination device 100 of the present invention includes a camera unit 110 and a control module 130 .

The camera unit 110 includes a lens 111 and an image sensor 113 to acquire an image of a user's eye part attempting iris authentication. Depending on the angle of view of the camera unit 110 formed by the lens 111, the camera unit 110 may be configured to photograph one eye of the user or both eyes.

The camera unit 110 photographs the user's eye part at a predetermined frame rate for iris recognition, and provides the obtained plurality of eye part images to the control module 130 .

On the other hand, as described below, the camera unit 110 periodically photographs the front in order to confirm the user's authentication attempt. speed).

Depending on the embodiment, the fake iris determination device 100 may further include a light source 115 for illuminating the user so that the camera unit 110 can generate a good quality eye part image. However, the light source at this time is not for inducing movement of the user's eyes, and therefore is not an essential component of the device 100 for determining the fake iris of the present invention. The light source 115 emits a beam of light having a predetermined wavelength toward the user's eye in order to capture an image of the user's eye portion. The wavelength of light emitted from the light source 115 may be any band, and white light may be used, but infrared light is preferably used. When using the infrared light source 115, the camera unit 110 must use an infrared filter, so that the influence of external natural light can be excluded, and the light source 115 can provide sufficient illumination. When the light source 115 emits infrared rays, the camera unit 110 may further include a filter passing infrared rays.

The control module 130 includes a user recognition unit 131, a counterfeit determination unit 133, and a memory 135, and controls overall operations of the fake iris determination device 100 of the present invention.

The user recognition unit 131 is a means for confirming the user's iris authentication attempt to initiate the identification of the fake iris, and captures the user's eye portion attempting authentication in the image provided by the camera unit 110 at a preset frame rate. It checks whether or not, that is, the user's authentication attempt. Conventionally, in face authentication and iris authentication, which recognize a user using a camera, various methods for confirming a user's authentication attempt can be used for user recognition by the user recognition unit 131.

On the other hand, in the present invention, when the camera unit 110 recognizes the outline of an eye in an image provided at a preset frame rate, it is confirmed that there is an authentication attempt of the user, or more clearly the iris, pupil, and pupil of the user's eye. In the case of recognizing all, a method of confirming that there is an authentication attempt by the user is additionally proposed. Since counterfeit determination is started immediately upon confirming the user's authentication attempt, a method of recognizing all of the iris, pupil, and pupil of the user's eyes is preferable to confirm that the user's eyes are not closed.

The user recognition unit 131 checks the outline of the user's eyes through image processing for each image (hereinafter referred to as 'image for user recognition') provided by the camera unit 110 at a preset frame rate, or checks the iris, pupil, and pupil. If all recognized images are confirmed, it is determined that there is an authentication attempt. Therefore, the image processing of the user recognition unit 131 does not have to be the same as the processing for extracting iris feature points.

When the user recognition unit 131 recognizes a user attempting iris authentication, the forgery determination unit 133 counterfeits the iris during authentication by using a plurality of consecutively provided images from the camera unit 110. judge whether In order to be distinguished from the image for user recognition generated by the camera unit 110 for user recognition, an image generated by the camera unit 110 after user recognition for determination of forgery is referred to as an 'image for determination of forgery'. On the other hand, since the image for determining forgery and the image for user recognition are generated by the same camera unit 110, they have the same resolution and image characteristics, and since the sclera, pupil, and iris must all be captured in the image for user recognition, The image for user recognition is basically a photograph of a subject (user) in the same or similar location.

A counterfeit discrimination method is to determine a living body when a change in a user's pupil is captured during a predetermined time period, and to determine a forgery when a change in the user's pupil is not captured. Here, the predetermined time corresponds to a time for continuously photographing a predetermined number of forgery determination images.

Referring to (a) of FIG. 4, as described in [Background technology], a human pupil has a pupil (p) at the center and an iris (c) surrounds the pupil (p). there is. The part of the eye excluding the pupil (p) and the iris (i) is called the sclera (e). The applicant discovered that the position and size of a person's pupils change minutely even in a short period of time when the movement of the entire pupil cannot be recognized. Therefore, the user recognition unit 131 uses whether the movement of the pupil position is recognized and the change in size (diameter) of the pupil is recognized in the predetermined number of forgery determination images, and the camera unit 110 takes pictures for iris authentication. It is determined whether the applied pupil (or iris) is fake or living.

On the other hand, even when iris authentication is attempted using an eye image printed at high resolution on paper or displayed at high resolution on the screen of a mobile device, the position of the entire pupil on the image may be moved due to a slight vibration of the operator, and the movement of the pupil may movement can be recognized. In order to solve this problem, it is necessary to determine whether there is a change in the position and size of the pupil in a plurality of consecutive images in which the position and size of the user's pupil do not change.

Based on this point, the forgery determination unit 133 ① moves the pupil for a predetermined time in a state where there is no movement (position movement) of the entire pupil (that is, in a plurality of images for determining counterfeiting continuously photographed) ② movement of the pupil It is determined whether the pupil (or iris) photographed by the camera unit 110 for iris authentication is forged or a living body by using whether both the and pupil size changes are recognized. The fake iris detection method of the fake determination unit 133 will be described again below with reference to FIG. 2 .

How to detect fake iris (Fig. 2)

In the basic fake iris determination method of the present invention, the camera unit 110 photographs a user attempting authentication to generate an eye image, and the user recognition unit 131 uses the image for user recognition generated by the camera unit 110. This is performed when it is confirmed whether the user's eye part is captured, that is, the user's authentication attempt.

The counterfeit determination unit 133 determines whether the pupil is a fake iris by checking whether the pupil moves and the size changes during a preset time without movement (position movement) of the entire pupil. Here, the predetermined time means a time for obtaining a predetermined number of images for determining forgery.

Hereinafter, the fake iris detection method of the present invention will be described with reference to FIG. 2, focusing on the operation of the fake iris determination unit 133.

<Confirmation of iris authentication attempt: S201, S203>

The camera unit 110 photographs the front at a predetermined frame rate (second frame rate below), generates an image for user recognition, and provides the image to the control module 130 . At this time, the light source 115 may or may not illuminate the front (S201).

The user recognition unit 131 detects the user's eyes by performing image processing on the user recognition image captured by the camera unit 110 . Depending on the embodiment, the user recognition unit 131 determines that there is an attempt to authenticate the user's iris when recognizing all of the pupil (p), iris (c) and sclera (e) of the user's eye as shown in (a) of FIG. It does (S203).

<Image Acquisition for Counterfeit Detection: S205>

When the user recognition unit 131 recognizes the user's eyes in step S203, the counterfeit determination unit 133 controls the camera unit 110 to acquire 'a plurality of images' for counterfeit determination continuously photographed at a preset frame rate. do. Depending on the embodiment, the user recognition unit 131 may control the camera unit 110 to generate 'plural images' for forgery determination. Image acquisition of the camera unit 110 continues during steps S205 to S213.

If the camera unit 110 is generating an image at the same first frame rate regardless of the recognition of the user's eyes by the user recognition unit 131, no other control is required, but the user recognition unit 131 recognizes the user's eyes. If an image for user recognition was being generated at the second frame rate before, the counterfeit determination unit 133 or the user recognition unit 131 controls the camera unit 110 to generate an image at the first frame rate.

<Pupil Recognition for Counterfeit Detection: S207>

The forgery determination unit 133 recognizes the pupil in the forgery determination image acquired in step S205, extracts pupil information, and stores it in the memory 135. Pupil information includes the coordinates of the center of the pupil and the maximum diameter.

<Check pupil change for a preset number of images: S209 to S213>

The counterfeit determination unit 133 repeatedly performs steps S205 and S207 for a plurality of predetermined images for counterfeit determination, obtains pupil information and stores it in the memory 135, while changing the coordinates of the pupil center point and the maximum diameter of the pupil. (S209), and if the coordinates of the central point of the pupil and the maximum diameter of the pupil have changed among a plurality of forgery determination images, the iris for which authentication is attempted is determined as the living body (S211).

If the iris of the authentication attempt is not identified as a living body in step S209, the forgery determination unit 133 repeats steps S205 to S209 for a preset number of images, thereby determining the position of the pupil and the maximum diameter of the pupil for a plurality of preset images. It is cumulatively determined whether this has changed (S213).

In other words, in the determination of whether or not S209 is alive, while the forgery determination unit 133 repeats steps S205 to S209 by a preset number of times, if both the coordinate movement of the pupil center point and the size change of the maximum diameter are recognized, it is determined as a living body. am. Therefore, while repeating steps S205 to S209, if it is confirmed that the coordinates of the center point of the pupil are moved in one image and the maximum diameter of the pupil is reduced or increased in another image, the forgery determination unit 133 determines the iris requested for authentication as a living body. do.

The counterfeit determination unit 133 sets the pupil information of the counterfeit-determination image for the first time to confirm the pupil information as 'reference pupil information' in order to check whether the coordinates of the pupil center point and the maximum diameter of the pupil are different among the plurality of counterfeit-determination images. , and can be compared with the pupil information of the remaining forgery determination images.

For example, (b), (c) and (d) of FIG. 4 are examples of images selected from a plurality of forgery determination images. For convenience of description, it is assumed that the image of FIG. 4(b) is the first image generated by the camera unit 110 to determine forgery. In (b) of FIG. 4, a virtual plane (x-y virtual plane) having the origin p1 as the location on the image of the center point of the pupil identified in the first forgery determination image is displayed. The origin p1 of the x-y virtual plane is the coordinate of the center point of the pupil. The maximum diameter of the first pupil is indicated by z1. Since z1 is for displaying the diameter of the diameter together, the direction has no meaning and only its length (diameter of the diameter) is meaningful. 4(c) shows the pupil information of the second forgery-determining image together with the reference pupil information, in which the coordinates p2 of the second pupil are horizontally moved in the x-y plane set as the reference pupil information. , and the maximum diameter z2 of the second pupil is marked with the same size as z1. 4(d) shows the pupil information of the third forgery determination image together with the reference pupil information, and the coordinates p3 of the third pupil in the x-y plane set as the reference pupil information are restored to the origin point p1. , and the maximum diameter z3 of the third pupil is longer than z1. In the forgery determination image of FIG. 4(d), the pupil is enlarged. Since the pupils in (b) to (d) of FIG. 4 have different center point coordinates and maximum diameters, the forgery determination unit 133 determines the iris of FIG. 4 requested for authentication as the living body.

If the iris for which authentication has already been requested is determined to be the living body before steps S205 to S209 are completed for all of the predetermined number of forgery determination images, the forgery determination unit 133 does not confirm all of the predetermined number, but the rest of the forgery determination unit 133 Steps S205 to S209 may not be repeated for the forgery determination image.

<If there is no change in the pupil, it is judged as a forgery: S213, S215>

Conversely, even though all of the predetermined number of fake images are checked (that is, continuously checked for a predetermined period of time), either ① there is no change in either the pupil center point or the maximum diameter, ② only the coordinates of the pupil are moved, or ③ the maximum If only the diameter is reduced or increased, the counterfeit determination unit 133 determines that the iris requested for authentication is counterfeit.

In the above method, the false iris detection method of the present invention is performed. In the method of FIG. 2, the number of predetermined images for determining forgery should be set to a number that can be captured for a time period in which the eye position is not changed unless there is an artificial motion by the user. This is because the change in the position of the user's eyes should not be recognized as a change in the coordinates of the central point of the pupil. From the user's point of view, since the user makes an authentication attempt consisting of one action, all procedures from step S203 to step S211 or step S215 must be performed during the authentication attempt consisting of that one action.

Example: fake iris recognition method (FIG. 3)

As described above, since the change in the position of the user's eye should not be recognized as a change in the coordinates of the central point of the pupil, if the position of the user's eye is changed within the preset number of images, the fake iris determination procedure should be terminated. The central procedure of the false iris determination method of FIG. 3 is the same as that of the false iris determination method of FIG. 2, and several steps are added to recognize eye position changes.

<Recognize the position of the user's eyes on the image: S301>

When the user recognition unit 131 recognizes the user's eye (pupil, iris, sclera) in step S203, the user's eye position is recognized in the image and stored in the memory 135. After the user recognition unit 131 stores the eye position as the reference position, step S205 of the counterfeit determination unit 133 is performed. Therefore, this step is placed between steps S203 and S205.

<Checking the eye position of the image to determine forgery: S303>

When the counterfeit determination image is acquired in step S205, the counterfeit determination unit 133 recognizes the position of the eye in the corresponding counterfeit determination image and compares it with the reference position stored in the memory 135. Therefore, this step is placed between steps S205 and S207 or between steps S207 and S209.

<End of fake judgment according to eye position change: S305>

If the position of the eye recognized in the newly obtained image is different from the reference position, the counterfeit determination unit 133 generates information or status information indicating that the position of the eye has changed, terminates the counterfeit authentication procedure, or performs counterfeit authentication. The process may be reset and step S205 is newly started to newly create reference pupil information (S305).

In the above method, by recognizing that the eye position is moved during forgery determination, an error of recognizing that the coordinates of the center point of the pupil are changed according to the change of the eye position can be eliminated. For example, an attempt to shake a fake iris printed on paper so that it can be judged as a living body can be filtered out as an error.

Counterfeit iris discrimination device (Fig. 5)

Referring to FIG. 5, the fake iris determining device 500 can be implemented by including the fake iris determining device 100 of FIG. It may be that software that performs the function has been installed.

The fake iris determination device 500 includes a camera unit 110, a light source 115, a color camera 501 and a control module 510.

The camera unit 110 is the same as the camera unit 110 of FIG. 1 . The color camera 501 creates a color image for display to a user. The fake iris determination device 500 may transmit the color image generated by the color camera 501 to the outside or display it on its own display unit (not shown).

The light source 115 emits a beam of light having a predetermined wavelength toward the user's eye in order to capture an image of the user's eye portion. The wavelength of light emitted from the light source 115 may be any band, and white light may be used, but infrared light is preferably used. When using the infrared light source 115, the camera unit 110 must use an infrared filter, so that the influence of external natural light can be excluded, and the light source 115 can provide sufficient illumination. When the light source 115 emits infrared rays, the camera unit 110 may further include a filter passing infrared rays.

The control module 510 includes a user recognition unit 131, a counterfeit determination unit 133, a memory 135, and a feature point extraction unit 511. The user recognition unit 131 and the forgery determination unit 133 are for determining a fake iris and are the same as the user recognition unit 131 and the forgery determination unit 133 of FIG. 1 .

The feature point extraction unit 511 operates when the forgery determination unit 133 determines that the iris being attempted for authentication is a living body. The feature point extraction unit 511 extracts information for iris authentication by extracting feature point data from the iris portion of the image provided by the camera unit 110 . The feature point data extracted by the feature point extraction unit 511 includes the feature points of the iris pattern unique to the user. In addition, iris feature points can be extracted by applying various conventionally known information and extraction methods.

Meanwhile, the feature point extraction unit 511 may control the camera unit 110 to regenerate an image for feature point extraction, i.e., iris authentication, or may extract feature points using an image for forgery determination as it is.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and is common in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Of course, various modifications and implementations are possible by those with knowledge of, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims (12)

In the method for identifying a fake iris,
generating an image for user recognition by photographing the front of the camera unit to recognize a user attempting iris authentication;
confirming that there is a user authentication attempt when the user recognition unit recognizes the pupil, iris, and sclera of the user's eye for which iris authentication is attempted in the user recognition image;
storing the location of the user's eyes in the image for user recognition as a reference location;
generating, by the camera unit, an image for forgery determination by photographing the user at a first frame rate when the user's authentication attempt is confirmed;
determining whether the position of the user's eyes in the forgery determination image is different from the reference position by the counterfeit determination unit;
measuring, by the counterfeit determination unit, pupil coordinates and pupil sizes of the user's eyes in the forgery determination image when the position of the user's eye in the forgery determination image is the same as the reference position;
If at least one of the motion and size change of the pupil is not confirmed while the counterfeit determination unit repeats the steps of generating and measuring the image for counterfeit determination a predetermined number of times, determining that the iris being attempted for authentication is forged step; and
When the motion and size change of the pupil are both recognized while the counterfeit determination unit repeats the steps of generating and measuring the image for counterfeit determination a predetermined number of times, determining the iris under authentication attempt as a living body. include,
Wherein the fake iris determination unit does not perform the step of determining the forgery and the step of determining the living body when the position of the user's eye in the forgery determination image is different from the reference position.
According to claim 1,
The step of measuring
extracting pupil information from the forgery-determining image by the forgery-determining unit whenever the camera unit generates the forgery-determining image at the first frame rate. the pupil information is the coordinates of the central point and the maximum diameter of the pupil in the forgery discrimination image; and
Determining that there is movement of the pupil when the position of the central point of the pupil is different from previously measured, and determining that there is a change in size of the pupil when the maximum diameter of the pupil is different from previously measured. A method for identifying a fake iris comprising a.
According to claim 1,
The counterfeit iris discrimination method characterized in that, when the step of determining the iris as the living body is performed before repeating the predetermined plurality of times, the step of generating and measuring the fake iris is stopped without further repetition. .
delete delete According to claim 1,
When the forgery determination unit determines the iris as a living body, the feature point extracting unit further comprises extracting a feature point of the iris from the forgery determination image for iris authentication.
In the fake iris discrimination device,
a camera unit for generating a user recognition image by photographing a front side to recognize a user attempting iris authentication, and generating an image for forgery determination by photographing the user at a first frame rate according to confirmation of the user recognition unit's authentication attempt;
the user recognition unit recognizing the pupil, iris, and sclera of the user's eye for which iris authentication is attempted in the user recognition image, and confirming whether there is an authentication attempt by the user; and
A forgery determination unit for determining whether the iris of the user attempting authentication is a living body or a forgery by performing image processing of receiving the forgery determination image from the camera unit a plurality of preset times and measuring the coordinates and pupil size of the pupil of the user's eye. include,
If at least one of the movement and size change of the pupil is not confirmed while the image processing is repeated a predetermined plurality of times, the counterfeit determination unit determines that the iris being attempted for authentication is forged, and authentication is performed when both the movement and size change of the pupil are recognized. The iris being tried is determined as a living body,
The counterfeit determination unit stores the position of the user's eyes in the user recognition image as a reference position, and whenever the camera unit provides the counterfeit determination image, the position of the user's eyes in the counterfeit determination image is different from the reference position. If the position of the user's eye is different from the reference position by determining whether the iris is fake or not, the fake iris determination device is not performed.
According to claim 7,
The forgery judgment unit,
Whenever the camera unit generates the forgery-determining image at the first frame rate, the coordinates and maximum diameter of the central point of the pupil are extracted from the forgery-determining image, and the position of the central point of the pupil is previously measured. and determining that there is a movement of the pupil when it is different from the above, and determining that there is a change in size of the pupil when the maximum diameter of the pupil is different from a previously measured one.
According to claim 7,
The forgery judgment unit,
The fake iris discrimination device, characterized in that, before repeating the predetermined plurality of times, when the iris is determined as a living body, the camera unit controls not to generate the forgery discrimination image.
delete delete According to claim 7,
and a feature point extraction unit extracting feature points of the iris from the forgery determination image for iris authentication when the forgery determination unit determines that the iris is a living body.

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