KR102072168B1 - Iris recognition method capable of biometric classification and system using the same - Google Patents

Abstract

The present invention relates to a method for iris recognition among face recognition, fingerprint recognition, vein recognition, and iris recognition represented by a bio recognition system, and more particularly, to a method for determining the authenticity of an iris.
In the present invention, the method for determining the authenticity of the iris comprises the steps of providing an image for inducing the movement of the pupil on the display; Photographing the movement of the pupil moving along the image; And determining whether the eyes are real by using data regarding eye movements from the photographing data.

Description

Iris recognition method capable of biometric classification and system using the same

The present invention relates to a method for iris recognition among face recognition, fingerprint recognition, vein recognition, and iris recognition represented by a bio recognition system, and more particularly, to a method for determining the authenticity of an iris.

The iris is located between the cornea and the lens of the eye, and as it is stretched or shrunk, it controls the amount of light by adjusting the size of the pupil, like the aperture of a camera. It is produced around 6 months of age, and after 18 months of completion, it does not change for a lifetime, the iris patterns of the right and left eyes are also different, and the probability of the same iris is 1 in 1 billion. For this reason, iris recognition is the most secure in the entire bio-recognition system, and is currently used in various fields such as smartphones, computers, access control, and banking. Iris recognition, first developed in 1994 by Professor John Dougman of the United Kingdom, is becoming increasingly popular, solving time, size and security issues.

Iris recognition is divided into four stages: segmentation, normalization, encoding, and matching. In Segmentation, a mask is created to accurately define the iris and pupil and not to compare non-iris parts. As shown in FIG. 1, when the iris undergoes a segmentation process, the red part shown in the picture after the segmentation is a masked part and the eyebrow part is removed. The green part allows the pupil and iris to be separated to extract their location, size and shape.

However, as a method of passing the segmentation process of the iris using an iris photograph output to the pattern of the iris through an elaborate printer is known, there is a growing concern about using iris verification as an authentication means. If you copy someone else's iris and pass it through the system, you have a big problem that makes your one-in-one-probability blind. In particular, as smart phones having authentication means using iris are hacked, there is a continuing demand for further security in using iris recognition as an authentication means.

The problem to be solved in the present invention is to provide a method that can prevent the iris authentication using the iris picture.

Another problem to be solved by the present invention is to provide a new method that can distinguish between the real eye and the iris picture.

Another object of the present invention is to provide an apparatus capable of preventing iris authentication using an iris picture.

In order to solve the above problems, the present invention

Providing an image for inducing movement of the pupil on the display;

Photographing the movement of the pupil moving along the image; And

A method of recognizing an iris, the method comprising determining whether the eye is real using data on eye movement from the photographing data.

In the present invention, the display may be a display of an electronic device capable of showing an image. In the practice of the present invention, the display may be a display of a smartphone, a TV, or an electronic sign. The display can be a 2D or 3D display.

In the present invention, the image of inducing the movement of the pupil may be an image of inducing movement of the left and right and / or up and down of the pupil. For example, the image for inducing the movement of the pupil may be a two-dimensional moving point on the display.

In the present invention, the image of inducing the movement of the pupil may be an image of inducing expansion and / or reduction of the pupil. For example, the image inducing the movement of the pupil may be an image in which the brightness and / or the color of the screen changes. For example, the brightness and / or color of the same screen may be an image that changes with time.

In the present invention, the shooting may be made with a camera. The camera may be a digital camera. In the practice of the present invention, the photographing may be a front camera attached to the smartphone.

In the present invention, the theoretical eye is not limited, but in the case of a real eye, it reacts according to the change of the screen appearing in the image, whereas in the case of a fake eye, it does not react according to the change of the screen appearing in the image. If you see the movement of the real eye can see that.

In one embodiment of the present invention, when a point moves in an arbitrary direction in the image, and the subject looks at the moving point according to the guidance of the smartphone, the pupil moves together according to the movement of the point. Therefore, the motion of the eye is detected along the movement of the point in the captured data. When the movement of the eye is detected according to the movement of the point, it can be confirmed that it is the actual human eye.

In another embodiment of the present invention, when the brightness of the still screen in the image changes, when the subject looks at the screen of the brightness changes according to the guidance of the smartphone, the size of the pupil is changed according to the brightness of the screen. Therefore, in the photographed data, it is detected that the size of the pupil changes in accordance with the brightness of the screen. When a change in the size of the pupil is detected according to the change in the brightness of the screen of the photographed data, it can be confirmed that the eyes of the real person.

In another embodiment of the present invention, when the color of the still picture changes in the image, when the subject looks at the screen of the brightness according to the guidance of the smartphone, the active area of the pupil is changed according to the color change of the screen. Therefore, in the photographed data, it is detected that the active area of the pupil changes according to the color change of the screen. If a change is detected in the active area of the pupil according to the change of the screen color of the photographed data, it may be confirmed that the eye is a real human eye.

In the present invention, the iris recognition method may be performed simultaneously or separately from a method of authenticating the user by comparing the iris data and the photographed iris data.

In one embodiment of the present invention, if it is made separately from the identity verification using the iris, it is possible to confirm only the movement of the photographed eye can determine only whether the actual eye.

In another embodiment of the present invention, when the authentication is performed at the same time as the identity using the iris, the iris data is acquired along with eye movement from the photographed data, and the acquired iris data is compared with the iris data of the user registered in the smartphone. You can check whether your eyes are real.

The present invention in one aspect,

Display that provides an image that induces eye movement:

A camera for photographing the movement of the pupil moving along the image of the display; And

The controller provides an image to a display, photographs a pupil using a camera, and determines whether the photograph is a real eye using data about the movement of the pupil from the photographed data.

In the present invention, the device may be a smartphone using the iris as an authentication means. In the present invention, the device may further include a self-light source suitable for iris recognition, for example, an infrared LED. In the present invention, the smart phone may be a commercially available smart phone such as the Galaxy Note 7.

In another aspect of the present invention,

Providing an image for inducing movement of the pupil on the display;

Photographing the movement of the pupil moving along the image;

Determining whether the image is a real eye by using data regarding eye movement from the photographing data; And

It provides an authentication method comprising the step of comparing the iris data obtained from the photographed data with the stored iris data.

When the iris is used as an authentication means, the present invention can solve the problem of passing through the authentication means by using a sophisticated photograph by checking whether it is an actual eye. Through this, the present invention improved the security of the device or system using the iris as an authentication means.

1 shows the iris before and after the segmentation process. (a) A picture showing the state before the segmentation process, (b) is a picture showing the state after the segmentation process.
2 is a view showing the front of the smart phone using the iris as an authentication means.
3 is a diagram illustrating a state in which a screen for inducing movement of a pupil is provided.
4 is a diagram illustrating a state in which a pupil moves according to a screen for inducing movement of the pupil.
5 is a diagram illustrating a state in which pupils move according to a screen for adjusting brightness.

Hereinafter, the present invention will be described in detail through examples. The following examples illustrate the invention and are not intended to limit the invention.

As illustrated in FIG. 2, the smartphone 100 using the iris as an authentication means captures the LED light 110 and the pupil that irradiate infrared light for iris photographing, and extracts the iris data from the photographed data. The camera 120 and a display 130 provided with an image for inducing the movement of the pupil. The inside of the smart phone 100 provides an image for inducing the movement of the pupil on the display, photographing the movement of the eye through the camera 120, and confirms the movement of the eye from the photographed data to determine whether the actual eye A data storage unit (not shown) is built in.

Example 1.

When looking at the smartphone 100 in order to use the smartphone 100, first the camera 120 of the smartphone 100 to take an eye, extract the iris data from the picture taken, the stored authentication Contrast with iris data. When the captured iris data and the stored iris data match, the controller of the smartphone provides an image on which the red dot 131 moves along the screen as shown in FIG. 3. This red dot can be any color or shape. Move at high speed or slow speed. People who are the subject of iris recognition should follow this point with their eyes. Because it moves irregularly, not in a predetermined pattern, it determines the position of the pupil that shows fine movement in the segmentation according to the situation, and determines whether the actual eye is chasing a point, and identifies the static eye and the dynamic eye.

The control unit of the smartphone 100 transmits a message to move the eyes along the red dot 131 as text through the display.

Looking at the eye moving along the moving point in the image provided by the user who wants to authenticate, as shown in Figure 3, when the red dot 131 is positioned as the top 131a of the display 130, the eyes of the user In 140, the pupil 141 is also positioned upwards to have the same shape as 141a. In addition, when the red dot 131 is positioned as the lower end 131b of the display 130, the pupil 141 is also positioned downward in the user's eye 140 to have the same shape as that of 141b. This process is taken by the camera 120 in real time, and checks whether the pupil 141 moves in accordance with the movement of the red dot 131.

If the pupil 141 moves according to the movement of the red dot 131, the eye is judged to be authenticated by the actual eye, and if the pupil 141 does not move according to the movement of the red dot 131, it is judged as not the actual eye and not authenticated. do.

Example 2

As in Example 1, when looking at the smartphone 100 to use the smartphone 100, the camera 120 of the smartphone 100 first photographs the eyes, and extracts the iris data from the photographed picture By contrast, the stored iris data is stored. When the captured iris data and the stored iris data match, the controller of the smartphone provides an image for adjusting the brightness of the screen on which the red dot 131 is stopped, as shown in FIG. 3. The controller of the smartphone 100 transmits a message for viewing the red dot 131 on the screen as text through the display.

When a user who wants to authenticate looks at a screen with a red dot whose brightness changes, as shown in FIG. 4, when the screen becomes dark, the size of the pupil 141 increases in the user's eye 140. If it is brightened, the size of the pupil 141 in the user's eyes 140 is reduced. This process is taken in real time with the camera 120 to determine whether the size of the pupil 141 changes in accordance with the movement of the screen on which the red dot 131 is displayed.

When the size of the pupil 141 is adjusted according to the brightness of the screen on which the red dot 131 is displayed, it is judged to be recognized as the actual eye, and the size of the pupil 141 is not adjusted according to the brightness of the screen on which the red dot 131 is displayed. If not, it is judged that it is not the real eye and will not authenticate.

Example 3.

Looking at the smartphone 100 to use the smartphone 100, the controller of the smartphone 100 transmits a message to the text to move the eyes along the red dot 131 through the display.

Looking at the eye moving along the moving point in the image provided by the user who wants to authenticate, as shown in Figure 3, when the red dot 131 is positioned as the top 131a of the display 130, the eyes of the user In 140, the pupil 141 is also positioned upwards to have the same shape as 141a. In addition, when the red dot 131 is positioned as the lower end 131b of the display 130, the pupil 141 is also positioned downward in the user's eye 140 to have the same shape as that of 141b. This process is taken by the camera 120 in real time, and checks whether the pupil 141 moves in accordance with the movement of the red dot 131.

When the pupil 141 moves according to the movement of the red dot 131, the eye 141 is judged to be the actual eye, and the eye movement is authenticated when the iris data extracted from the photographed data matches the stored iris data.

If the pupil 141 does not move according to the movement of the red dot 131, or if the pupil movement does not match the iris data extracted from the photographed data with the stored iris data, the authentication is not performed.

100: smartphone
110: LED lighting
120: camera
130: display

Claims (9)

In the user identification method using the iris information on the smartphone,
Photographing, by the smartphone camera, the iris of the user;
Determining whether the user's iris matches the iris data stored in the smartphone;
If the iris data match, providing an image for inducing the movement of the pupil on the smartphone display using the iris information as an authentication means;
Photographing the movement of the pupil moving along the image; And
Using the data on the movement of the eyes in the photographing data, judging by the actual human eye when the pupil moves in accordance with the provided image, and judging as a fake eye when not moving according to the provided image; Smartphone user authentication comprising a Way. The method of claim 1, wherein the image of inducing the movement of the pupil is a smartphone user authentication method, characterized in that the image of inducing the movement of any one of the left, right, up, down, left and right of the pupil. The method of claim 1, wherein the image inducing movement of the pupil is an image inducing expansion or contraction of the pupil. delete The method of claim 1, wherein the message is delivered to the display to look at the image. delete In a smartphone device as an authentication means using iris information,
Display that provides an image that induces eye movement:
A camera for photographing the movement of the pupil moving along the image of the display; And
Providing an image on the display, capturing the pupil using the camera, and using the data on the eye movement from the photographed data, if the pupil moves according to the provided image, it is judged as the real human eye and does not move according to the provided image. If not, the control unit to determine a fake eye; comprising a smartphone. delete delete

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