WO2017213338A1

WO2017213338A1 - Device and method for msp-based horizontal-vertical biometric recognition

Info

Publication number: WO2017213338A1
Application number: PCT/KR2017/003397
Authority: WO
Inventors: 홍혁기; 조영창; 정석원; 최연식
Original assignee: 전자부품연구원
Priority date: 2016-06-10
Filing date: 2017-03-29
Publication date: 2017-12-14
Also published as: KR20170139887A; KR101842771B1

Abstract

Provided are a device and a method for MSP-based horizontal-vertical biometric recognition. The device for biometric recognition, according to an embodiment of the present invention, comprises: a light source array for irradiating lights on the wrist of a user; a detector array for detecting diffused reflective lights from the wrist; a controller for controlling the strength of light sources included in the light source array; and a processor for identifying a user using a detection result from the detector array. As a result, biometric information of varying depths of the same area in MSP-based biometric recognition can be collected, thereby increasing personal identification rates.

Description

MSP-based Horizontal-Vertical Biometric Devices and Methods

The present invention relates to biometric technology, and more particularly, to an apparatus and method for identifying an individual using biometric information.

As a personal identification technology using biometric information, the most widely used fingerprint recognition technology is presently used. Fingerprints identify individuals based on their uniqueness.

However, as you can see from the recent news that fingerprints were made on silicon and fake fingerprints were used, the fingerprint recognition has limitations.

This is why there is a need for an improved personal identification technique using biometric information in a more advanced manner, where unauthorized personal authentication is not possible.

The present invention has been made to solve the above problems, an object of the present invention is to provide a horizontal skin-vertical biometric apparatus and method based on MSP (Multispectral Skin Photomatrics).

According to an embodiment of the present invention, a biometric device includes: a light source array configured to irradiate light onto a wrist of a user; A detector array for detecting diffusely reflected lights of the wrist; A controller for controlling the intensity of the light sources included in the light source array; And a processor for identifying a user using the detection result in the detector array.

The controller may collectively control the intensity of a plurality of light sources constituting the light source array.

In addition, the controller may control the intensity of a plurality of light sources constituting the light source array to increase linearly.

The controller may control some of the intensities of the plurality of light sources constituting the light source array to a first intensity and another to a second intensity.

In addition, the controller may control only some of the plurality of light sources constituting the light source array to operate.

The light source array may include light sources that irradiate lights of different wavelengths.

In addition, the light source array may be provided inside the detector array.

In the detector array, a first detector that detects the first light and the second light that has diffusely reflected the wrist, and a second detector that detects the first light and the second light that have diffusely reflected the wrist are different positions. Can be installed on

The processor may identify the user by combining the intensity of the first light detected by the first detector and the intensity of the second light, and the intensity of the first light and the intensity of the second light detected by the second detector. .

On the other hand, a biometric method according to another embodiment of the present invention, the step of irradiating while controlling the intensity of the light to the wrist of the user; Detecting light that has diffusely reflected the wrist; And identifying the user by using the detection result.

On the other hand, a biometric device according to another embodiment of the present invention, the light source array for irradiating light to the wrist of the user; A detector array for detecting diffusely reflected lights of the wrist; A controller for controlling the intensity of the light sources included in the light source array; And a communication unit configured to transmit a detection result of the detector array.

On the other hand, a biometric method according to another embodiment of the present invention, the step of irradiating while controlling the intensity of the light to the wrist of the user; Detecting light that has diffusely reflected the wrist; And transmitting a detection result.

As described above, according to the embodiments of the present invention, in biometrics based on MSP (Multispectral Skin Photomatrics), it is possible to collect biometric information at various depths for the same area, thereby increasing personal identification rate. do.

1 to 4 are views provided to explain the concept of horizontal biometrics using a plurality of light sources,

5 to 8 is a view provided to explain the concept of the vertical biometrics by adjusting the intensity of the light source,

9 is a view provided to explain the MSP-based biometric device according to an embodiment of the present invention, and

10 is a diagram provided to explain an MSP-based biometric device according to another embodiment of the present invention.

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

1 is a view provided to explain the concept of biometrics applicable to an embodiment of the present invention.

As shown in FIG. 1, light emitting diode (LED) -arrays 120-1 and 120-2 are listed on the inside, and photo diode (PD)-arrays 130-1 and 130-on the outside. 2) is listed.

The LED-arrays 120-1 and 120-2 and the PD-arrays 130-1 and 130-2 are elements provided in the biometric device according to the embodiment of the present invention. The biometric device is attached to the skin of the human body, as shown in FIG. 2, the LEDs irradiate light onto the skin, and the PDs detect light that diffusely reflects off the skin. Specifically,

1) PD-1 detects the light irradiated by LED-1 and diffusely reflected the skin and the light irradiated by LED-2 and diffusely reflected the skin,

2) PD-2 also detects light irradiated by LED-1 to diffusely reflect the skin and light irradiated on LED-2 to diffusely reflect the skin.

The wavelength of the LED-array-1 120-1 and the wavelength of the LED-array-2 120-2 may be implemented differently. For example, the LEDs constituting the LED-array-1 120-1 may be implemented with red LEDs, and the LEDs constituting the LED-array-2 120-2 may be implemented with blue LEDs.

Furthermore, each of the LEDs constituting the LED-arrays 120-1 and 120-2 may be implemented with various wavelengths. For example, the LED-array-1 120-1 may be implemented as an IR-LED or a Red-LED. , Green-LED, Blue-LED can be repeatedly arranged, and this is also the case for the LED-array-2 (120-2). Such an implementation is illustrated in FIG. 3.

If the LED-arrays 120-1 and 120-2 are each composed of N LEDs, and the PD-arrays 130-1 and 130-2 are each composed of N PDs, In combination, M light detection patterns can be obtained. One light detection pattern includes 2N light detection data. Using M light detection patterns is more accurate in personal identification than using one light detection pattern.

In personal identification, the LED combination can be configured in various ways. E.g,

1) Only the IR-LED and Red-LED are turned on to generate the first light detection pattern.

2) Only the IR-LED and Green-LED are turned on to create a second light detection pattern.

3) Only the IR-LED and Blue-LED are turned on to generate a third light detection pattern.

4) Only the Red-LED and Green-LED are turned on to generate the fourth light detection pattern.

...

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

As a result, as shown in FIG. 4, M * 2N photodetection data can be obtained, which corresponds to M photodetection patterns. One light detection pattern is composed of 2N light detection data.

On the other hand, since different skin conditions (wrinkle, dry skin thickness / density, dermal thickness / density, etc.) and tissue state (vascular position / shape, muscle position / shape) are different for each user, M light detection patterns can be used for personal identification. Can be.

That is, a DB is stored by storing M light detection patterns for each individual, and personal identification is possible using the DB.

5 to 8 are diagrams provided to explain a concept of personal identification that extends the aforementioned biometric method. FIG. 5 illustrates a case in which the intensity of light emitted from the LED-1 included in the LED-array-1 120-1 is changed, and FIG. 6 illustrates the LED-2 included in the LED-array-2 120-2. The case where the intensity of light emitted is changed is shown, respectively, and these are also shown in FIG.

5 to 7, as the intensity of the LED increases, the depth of skin tissue to which light diffuses and reflects is different. Therefore, the light detection data is different depending on the light intensity.

By adjusting the light intensity of the LEDs, the combination of the LEDs can be further varied. For example, if the light intensity is equal to "L3> L2> L1"

1) Create the first light detection pattern with the red-LED intensity as "L1" and the blue-LED intensity as "L1".

2) Create a second photodetection pattern with Red-LED intensity "L2" and Blue-LED intensity "L1",

3) Create a third photodetection pattern with Red-LED intensity "L3" and Blue-LED intensity "L1".

...

9) The intensity of the red LED is set to "L3", and the intensity of the blue LED is set to "L3", thus generating the ninth light detection pattern. Also nine combinations are possible.

Generating a light detection pattern while simply increasing the intensity linearly from " L1 " to " L2 " " L3 " for M combined LEDs, as shown in FIG. 8, a total of 3 * M lights The detection pattern is generated. 3 times more than the light detection data shown in FIG. 4.

Increasing the light detection data makes it possible to specify the light detection pattern more, resulting in improved personal identification rate.

FIG. 9 is a diagram provided to explain a multi-spectral skin photomatrics (MPS) -based personal identification device according to an embodiment of the present invention. As shown in FIG. 9, the personal identification device 100 according to the embodiment of the present invention is implemented as a wrist worn device.

As shown in FIG. 9, the personal identification device 100 according to the embodiment of the present invention may include a power source 110, an LED array 120, a PD array 130, an LPF & 150, controller 160, processor 170, and DB 180.

The power source 110 is implemented as a constant voltage source or a constant current source, and supplies power required for light emission of the LED array 120.

Since the LED array 120 and the PD array 130 have been described above, a description thereof will be omitted to avoid duplication.

The LPF & Amp. 140 performs filtering to remove noise from the photocurrent resulting from the photodetection by the PD array 130, amplifies the filtered photocurrent, and applies it to the ADC 150.

The ADC 150 converts the analog optical current signal output from the LPF & 140 into a digital signal and applies it to the processor 170.

The processor 170 generates photodetection patterns using the photocurrent signal transmitted from the ADC 150, compares the generated photodetection patterns with the patterns stored in the DB 180, and performs personal identification.

The processor 170 may be incorporated into the controller 160, or may be implemented as a separate computing device.

The controller 160 controls the selective driving and intensity of the LED array 120 and the selective driving of the PD array 130.

That is, the controller 160 controls only some of the LEDs constituting the LED array 120 to operate. Furthermore, the controller 160 may control all of the intensities of the LEDs constituting the LED array 120 in the same batch, or some may be controlled by L1, some by L2, and others by L3.

In addition, the controller 160 may control to linearly increase and decrease the intensity of the LEDs linearly, as well as control for nonlinear increase / decrease.

The controller 160 sets the cutoff frequency of the LPF & 140 and controls the gain.

10 is a diagram provided to explain an MPS-based personal identification device according to another embodiment of the present invention. The personal identification device 100 according to the embodiment of the present invention is different from the personal identification device 100 illustrated in FIG. 10 in that the personal identification device 100 does not include the DB 180 but the communication unit 190.

The processor 170 of the personal identification device 100 illustrated in FIG. 10 generates photodetection patterns using the photocurrent signal transmitted from the ADC 150, and generates the generated photodetection patterns through the communication unit 190. Transfer to the smartphone 200.

Then, the smartphone 200 compares the light detection pattern received from the communication unit 190 with the patterns storing the personal identification.

While the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims

A light source array for irradiating lights on a wrist of a user;

A detector array for detecting diffusely reflected lights of the wrist;

A controller for controlling the intensity of the light sources included in the light source array; And

And a processor for identifying a user by using the detection result of the detector array.
The method according to claim 1,

The controller,

Biometric apparatus, characterized in that for collectively controlling the intensity of the plurality of light sources constituting the light source array.
The method according to claim 2,

The controller,

A biometric device according to claim 1, wherein the intensity of the plurality of light sources constituting the light source array increases linearly.
The method according to claim 1,

The controller,

The biometric apparatus of claim 1, wherein some of the intensities of the plurality of light sources constituting the light source array are controlled by the first intensity and the other by the second intensity.
The method according to claim 1,

The controller,

A biometric device, characterized in that for controlling only some of the plurality of light sources constituting the light source array.
The method according to claim 1,

The light source array,

A biometric device comprising light sources for irradiating light of different wavelengths.
The method according to claim 1,

The light source array,

Biometric apparatus, characterized in that provided on the inside of the detector array.
The method according to claim 1,

In the detector array,

A first detector for detecting the first and second light diffusely reflected on the wrist and a second detector for detecting the first and second light diffused and reflected on the wrist are provided at different positions. Biometric device.
The method according to claim 8,

The processor,

And identifying the user by combining the intensity of the first light and the intensity of the second light detected by the first detector and the intensity of the first light and the intensity of the second light detected by the second detector.
Irradiating the wrist of the user while controlling the intensity of the lights;

Detecting light that has diffusely reflected the wrist; And

And identifying a user using the detection result.
A light source array for irradiating lights on a wrist of a user;

A detector array for detecting diffusely reflected lights of the wrist;

A controller for controlling the intensity of the light sources included in the light source array; And

And a communicator configured to transmit the detection result of the detector array.
Irradiating the wrist of the user while controlling the intensity of the lights;

Detecting light that has diffusely reflected the wrist;

Transmitting a result of the detection; biometric method comprising a.