KR20180129133A - 3D MSP-based Biometric Device and Method - Google Patents

Abstract

Provided are a 3D MSP-based biometric apparatus and a method thereof. The biometric apparatus according to the present invention comprises: a light source irradiating light on a wrist of a user; an image sensor detecting light diffused and reflected from the wrist to generate an optical detection pattern; a lens placing a focus of the image sensor at a specific depth in the wrist; and a control part controlling the lens and the image sensor so that the focus of the image sensor moves sequentially to different depths inside the wrist to generate the light detection patterns, thereby significantly increasing an identification rate by increasing resolution for individual identification according to biometric identification based on 3D MSP.

Description

TECHNICAL FIELD [0001] The present invention relates to a 3D MSP-based biometric device and method,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to biometrics technology, and more particularly, to an apparatus and method for identifying an individual using biometrics information.

As a biometric technology using biometric information, fingerprint recognition technology is currently widely used. The fingerprint identifies an individual based on the fact that each person is unique.

However, fingerprint recognition has limitations, as we can see from recent reports that fingerprints were taken on silicon to create fake fingers and using them to detect unauthorized fingerprints.

This is why biometric techniques using biometric information that is more improbable and which can not be corrupted by personal authentication are necessary.

Accordingly, a biometric technology based on Multispectral Skin Photometrics (MSP) has been developed. To do this, the biometric device should be worn on the wrist to acquire biometric information and compare it with the registered biometric information.

One of the major challenges faced by MSP-based biometrics is to increase the resolution of individual identification by biometrics to increase identification rates.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a three-dimensional MSP-based biometric device and method for increasing the resolution of personal identification according to biometric identification, .

According to an aspect of the present invention, there is provided a biometric device including: a light source for irradiating light on a wrist of a user; An image sensor for detecting light diffused and reflected from the wrist and generating an optical detection pattern; A lens for positioning the focus of the image sensor at a specific depth within the wrist; And a control unit for controlling the lens and the image sensor so that the focus of the image sensor sequentially moves to different depths inside the wrist to generate the light detection patterns.

The lens may be a liquid lens that can change the focal distance by an electric drive.

The biometric device according to the present invention may further include a spacer for separating the position of the image sensor from the skin of the wrist by a predetermined distance.

The light source is provided at the lower portion of the spacer and can be brought into close contact with the skin of the wrist.

The light source may be provided on the upper portion of the spacer and may be spaced a certain distance from the epidermis of the wrist.

And a translucent layer formed in a space forming a path from the light source to the epidermis of the wrist in the spacer.

The light source includes a light source array in a first axial direction; And a light source array in a second axial direction.

The first axis and the second axis may be perpendicular.

The light source may include light source elements that emit light of different wavelengths.

According to another aspect of the present invention, there is provided a method of illuminating a user's wrist, Controlling the lens so that the focal point of the image sensor for detecting the light diffused and reflected from the wrist and generating the light detection pattern sequentially moves to different depths in the wrist; And generating a three-dimensional photodetection pattern by laminating photodetecting patterns generated while the focus is sequentially moved.

According to another aspect of the present invention, there is provided a light source device comprising: a light source for irradiating light on a wrist of a user; An image sensor for detecting light diffused and reflected from the wrist and generating an optical detection pattern; A lens for positioning the focus of the image sensor at a specific depth within the wrist; And a controller for controlling the lens and the image sensor to generate the photodetection patterns while sequentially moving the focal point of the image sensor to different depths in the wrist and comparing the generated photodetection patterns with the registered photodetection patterns, And a controller for performing the biometric authentication using the biometric information.

According to still another aspect of the present invention, there is provided a method of illuminating a user's wrist, Controlling the lens so that the focal point of the image sensor for detecting the light diffused and reflected from the wrist and generating the light detection pattern sequentially moves to different depths in the wrist; Forming a three-dimensional photodetection pattern by laminating photodetection patterns generated while the focus is sequentially moved; And comparing the generated three-dimensional photodetection pattern with a registered three-dimensional photodetection pattern to perform biometric identification.

As described above, according to the embodiments of the present invention, the resolution for individual identification based on biometrics can be increased based on the three-dimensional MSP, and the identification rate can be dramatically increased.

FIG. 1 and FIG. 2 are diagrams provided in a conceptual description of a three-dimensional MSP module according to an embodiment of the present invention,
3 is a diagram illustrating a three-dimensional photodetection pattern,
FIG. 4 is a view illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.
5 is a view illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.
6 is a view illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.
7 is a view illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.
FIG. 8 is a view for explaining a three-dimensional MPS-based personal authentication system according to another embodiment of the present invention,
9 is a block diagram showing an internal configuration of the three-dimensional MSP module shown in FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 and FIG. 2 are diagrams provided in a conceptual description of a three-dimensional multispectral skin photometrics (MSP) module according to an embodiment of the present invention.

1 is a cross-sectional view of a three-dimensional MSP module according to an exemplary embodiment of the present invention, and FIG. 2 is a view illustrating a three-dimensional MSP module according to an exemplary embodiment of the present invention while looking from above .

A three-dimensional MSP module according to an embodiment of the present invention generates an optical detection pattern in the user's wrist three-dimensionally. Generating the photodetection pattern in three dimensions means that the photodetection patterns are generated by scanning while changing the depth sequentially / continuously in the wrist of the user, and are arranged according to the depth.

As shown in FIGS. 1 and 2, the three-dimensional MSP module according to the embodiment of the present invention includes an image sensor 110, a liquid lens 120, A spacer 130, and a light source 140.

The light source 140 is a device that emits light to the user's wrist, and is usually implemented by an LED (Light Emitting Diode) array. As shown in FIG. 1, the light source 140 is provided at a lower portion of the spacer 130, which is a position where the light source 140 can adhere to the skin of the user's wrist.

Also, as shown in FIG. 2, the light source 140 is implemented as four light source arrays. Specifically, one light source array is provided on the upper side, the lower side, the left side, and the right side of the image sensor 110, respectively. That is, the image sensor 110 is surrounded by the light source arrays.

The light source arrays are arranged in the same direction between the light source arrays provided on the upper side and the lower side of the image sensor 110. In addition, the light source arrays are arranged in the same direction between the light source arrays provided on the left and right sides of the image sensor 110.

The light source arrays on the upper and lower sides of the image sensor 110 and the light source arrays on the left and right sides are perpendicular to each other.

The image sensor 110 is irradiated to the user's wrist from the light source 140 and detects light diffused and reflected inside the wrist of the user to generate a light detection pattern. Since the image sensor 110 is in the form of a two-dimensional matrix, an optical detection pattern formed by the image sensor 110 is also two-dimensional data in which optical detection data are arranged in a matrix form.

The spacer 130 is configured to separate the position of the image sensor 110 from the skin of the user's wrist by a predetermined distance or more. The light source 140 described above is provided on the spacer 130. [

The liquid lens 120 is a non-driving optical system capable of electrically changing the focal distance. The liquid lens 120 is not mechanically driven to change the position of the lens, and is free from vibration or noise, and it is also possible to change the focus rapidly, intermittently, not continuously.

The liquid lens 120 is located at the front end of the image sensor 110 and positions the focus of the image sensor 110 at a specific depth inside the wrist. Accordingly, the image sensor 110 can generate an optical detection pattern for a specific depth in the wrist.

The three-dimensional MSP module according to the exemplary embodiment of the present invention includes a control unit (not shown) which controls the focus of the image formed on the image sensor 110 in order to move sequentially to different depths in the wrist. The lens 120 is driven.

Sequential movement of the focal point is possible both in a manner from the deep part of the wrist to the shallow part and a method of moving from the shallow part to the deep part of the wrist.

Further, the control unit controls the image sensor 110 to generate the light detection patterns while the focus of the image sensor 110 is sequentially moved. Accordingly, the image of the user's wrist is scanned in the depth direction by the image sensor 110 to generate the light detection patterns.

A three-dimensional photodetection pattern is generated by sequentially laminating the photodetection patterns generated by the image sensor 110 according to depths. A three-dimensional photodetection pattern is illustrated in Fig.

4 is a view illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.

Dimensional MSP module shown in FIG. 4 is different from the three-dimensional MSP module shown in FIG. 1 in that the light source 140 is located at the upper portion of the spacer 130 and is not closely attached to the user's wrist skin, .

In the case where it is technically impossible or difficult to keep the light source 140 away from the user's wrist skin and it is difficult to bring the light source 140 into close contact with the user's wrist skin, The structure shown in Fig.

5 is a view illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.

The three-dimensional MSP module shown in FIG. 5 has a structure in which a light transmission layer is formed in a space that constitutes a path from the light source 140 to the user's wrist skin at the spacer 130, There is a difference from the 3D MSP module.

The light-transmitting layer can be realized by not only an optical fiber but also other materials.

FIG. 6 is a diagram illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention. As shown in FIG. 6, the number of light sources constituting the light source array and the interval between the light sources in the three-dimensional MSP module can be variously modified.

7 is a diagram illustrating a conceptual description of a three-dimensional MSP module according to another embodiment of the present invention.

The three-dimensional MSP module shown in FIG. 7 differs from the three-dimensional MSP module shown in FIG. 2 in that the wavelengths emitted from the light sources constituting the light source array are different from each other.

That is, as shown in FIG. 7, the light sources constituting the light source array can be implemented by various combinations of IR-LED, Red-LED, Green-LED, and Blue-LED.

Furthermore, M LEDs constituting the light source array are combined into M types through the control unit, so that M light detection patterns can be obtained for one depth. For example, at the same depth,

1) Turn on only the IR-LED and Red-LED to generate the first light detection pattern,

2) turn on only the IR-LED and Green-LED, generate a second light detection pattern,

3) Turn on only the IR-LED and Blue-LED to generate the third light detection pattern,

4) Turn on only Red-LED and Green-LED to generate fourth optical detection pattern,

...

M) It is possible to generate the M-th light detection pattern by turning ON only the IR-LED, the Red-LED and the Green-LED.

In this case, three-dimensional light detection patterns as illustrated in FIG. 3 are generated for M number of light source combinations, so that the biometric recognition rate can be further increased.

8 is a view for explaining a three-dimensional MPS-based personal authentication system according to another embodiment of the present invention. 8, the personal authentication system according to the embodiment of the present invention is constructed by including a three-dimensional MSP module 100, a smart phone 200, and an authentication server 300. As shown in FIG.

As described above, the three-dimensional MSP module 100 can generate a three-dimensional photodetection pattern based on MSP, perform personal authentication through biometric identification using the generated three-dimensional photodetection pattern, A three-dimensional photodetection pattern may be transmitted to the smartphone 200.

The smartphone 200 can perform personal authentication through biometric identification using the three-dimensional photodetection pattern received from the three-dimensional MSP module 100, and can also perform a three-dimensional photodetection pattern to the authentication server 300 It can also be delivered.

The authentication server 300 performs personal authentication through biometric identification using the three-dimensional photodetection pattern received from the smartphone 200.

FIG. 9 is a block diagram showing an internal configuration of the three-dimensional MSP module 100 shown in FIG.

The three-dimensional MSP module 100 includes an image sensor 110, a liquid lens 120, a light source 140, a control unit 150, a storage unit 160, and a communication unit 170, as shown in FIG. .

The image sensor 110, the liquid lens 120, and the light source 140 have been described in detail with reference to FIGS. 1 to 7, so that a detailed description thereof will be omitted.

The control unit 150 controls the liquid lens 120 and the image sensor 110 to generate a three dimensional light detection pattern and transmits the generated three dimensional light detection pattern to the smart phone 200 through the communication unit 170 .

When the three-dimensional MSP module 100 includes a personal authentication function, the controller 150 controls the three-dimensional photodetection pattern generated through the image sensor 110 to be displayed on the three- In comparison with the pattern, personal authentication through biometric identification is possible.

To display the authentication result, the three-dimensional MSP module 100 may further include a display and / or a speaker.

It goes without saying that the technical idea of the present invention can also be applied to a computer-readable recording medium having a computer program for performing the functions of the apparatus and method according to the present embodiment. In addition, the technical idea according to various embodiments of the present invention may be embodied in computer-readable code form recorded on a computer-readable recording medium. The computer-readable recording medium is any data storage device that can be read by a computer and can store data. For example, the computer-readable recording medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical disk, a hard disk drive, or the like. In addition, the computer readable code or program stored in the computer readable recording medium may be transmitted through a network connected between the computers.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

110: Image Sensor
120: Liquid Lens
130: Spacer
140: Light Source

Claims (12)

A light source for irradiating light to the user's wrist;
An image sensor for detecting light diffused and reflected from the wrist and generating an optical detection pattern;
A lens for positioning the focus of the image sensor at a specific depth within the wrist; And
And a control unit for controlling the lens and the image sensor so as to generate light detection patterns while sequentially moving the focus of the image sensor to different depths in the wrist.
The method according to claim 1,
The lens,
And is a liquid lens capable of changing a focal distance by an electric drive.
The method according to claim 1,
And a spacer for spacing a position of the image sensor from a skin of the wrist by a predetermined distance.
The method of claim 3,
The light source includes:
And is provided at a lower portion of the spacer so as to come into close contact with the skin of the wrist.
The method of claim 3,
The light source includes:
And is provided at an upper portion of the spacer and spaced apart from the epidermis of the wrist by a certain distance.
The method of claim 5,
And a translucent layer formed in a space constituting a path from the light source to the epidermis of the wrist in the spacer.
The method according to claim 1,
The light source includes:
A light source array in a first axial direction; And
And a second light source array in the second axial direction.
The method of claim 7,
Wherein the first axis and the second axis are perpendicular to each other.
The method according to claim 1,
The light source includes:
And light source elements that emit light of different wavelengths.
Irradiating light to a user's wrist with a light source;
Controlling the lens so that the focal point of the image sensor for detecting the light diffused and reflected from the wrist and generating the light detection pattern sequentially moves to different depths in the wrist; And
And generating a three-dimensional photodetection pattern by stacking the photodetection patterns generated while the focus is sequentially moved.
A light source for irradiating light to the user's wrist;
An image sensor for detecting light diffused and reflected from the wrist and generating an optical detection pattern;
A lens for positioning the focus of the image sensor at a specific depth within the wrist; And
The focus of the image sensor is sequentially moved to different depths in the wrist to control the lens and the image sensor to generate the photodetection patterns, and the generated photodetection patterns are compared with the registered photodetection patterns to perform biometrics And a control unit for controlling the biometric device.
Irradiating light to a user's wrist with a light source;
Controlling the lens so that the focal point of the image sensor for detecting the light diffused and reflected from the wrist and generating the light detection pattern sequentially moves to different depths in the wrist;
Forming a three-dimensional photodetection pattern by laminating photodetection patterns generated while the focus is sequentially moved;
And comparing the generated three-dimensional photodetection pattern with the registered three-dimensional photodetection pattern to perform biometric identification.

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