Living body identification device, living body identification method and living body authentication system

• US 10,043,087 B2
• Filed: 01/05/2016
• Issued: 08/07/2018
• Est. Priority Date: 07/02/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhu, Lin
• Primary Examiner(s): Allison, Andrae S
• Application Number:
  US15/104,748
• Publication Number:
  US 20170193317A1
• Time in Patent Office: 945 Days
• Field of Search: None
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 3/00 Apparatus for testing the eyes; Instruments for examining the eyes eye inspection using ultrasonic, sonic or infrasonic waves A61B8/10; devices for treatment of the eyes A61F9/00; exercisers for the eyes A61H5/00; optical systems in general G02B
• CPC Class Codes: A61B 3/1216 for diagnostics of the iris
• CPC Class Codes: A61B 5/0044 for the heart
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/117 Identification of persons methods or arrangements for recognising patterns, e.g. fingerprints, G06F18/00, G06V40/00; identification of persons by analysing their voice or speech G10L17/00
• CPC Class Codes: A61B 5/1172 using fingerprinting
• CPC Class Codes: A61B 5/1176 Recognition of faces
• CPC Class Codes: A61B 5/489 Blood vessels
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06V 40/10 Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
• CPC Class Codes: G06V 40/12 Fingerprints or palmprints
• CPC Class Codes: G06V 40/1312 direct reading, e.g. contactless acquisition
• CPC Class Codes: G06V 40/15 Biometric patterns based on physiological signals, e.g. heartbeat, blood flow
• CPC Class Codes: G06V 40/40 Spoof detection, e.g. liveness detection
• CPC Class Codes: G06V 40/45 Detection of the body part being alive
• CPC Class Codes: G06V 40/70 Multimodal biometrics, e.g. combining information from different biometric modalities

Abstract

The present invention provides a living body identification device, a living body identification method and a living body authentication system. The living body identification device comprises an acquisition unit and a processing unit; the acquisition unit is configured for emitting light towards a characteristic position of the living body and receiving light reflected from the characteristic position, then converting the light into an electrical signal, and sending the electrical signal to the processing unit; the acquisition unit comprises at least one light source and a plurality of photosensitive elements which are disposed at intervals; the processing unit is configured for generating an image of the characteristic position according to the electrical signal, and processing the image of the characteristic position to eventually obtain the characteristic information of the characteristic position, the characteristic information being used for uniquely identifying the living body.

Claims

1. A living body identification device for identifying characteristic information of a living body, comprising an acquisition unit and a processing unit, wherein, the acquisition unit is configured for emitting light towards a characteristic position of the living body and receiving light reflected from the characteristic position, then converting the received light into an electrical signal, and sending the electrical signal to the processing unit;

and the acquisition unit comprises at least one light source and a plurality of photosensitive elements which are disposed at intervals; and

the processing unit is configured for generating an image of the characteristic position according to the electrical signal, and processing the image of the characteristic position to eventually obtain the characteristic information of the characteristic position, the characteristic information being used for uniquely identifying the living body,

wherein the acquisition unit comprises a transparent substrate and a plurality of light sources and a plurality of photosensitive elements arranged on a surface of the transparent substrate at one side, the light sources being configured for emitting light towards the characteristic position, the photosensitive elements being configured for receiving the light reflected from the characteristic position and converting the received light into an electrical signal; and

the plurality of light sources are distributed at intervals, and the plurality of photosensitive elements are arranged in spaces between the light sources, which can make sure that light with a larger angle emitted by the plurality of light sources to the characteristic position can be received by the plurality of photosensitive elements after being reflected by the characteristic position.

2. The living body identification device according to claim 1, wherein the plurality of light sources are uniformly distributed, and the plurality of photosensitive elements are uniformly distributed.

3. The living body identification device according to claim 2, wherein the plurality of light sources are arranged in a matrix, the plurality of photosensitive elements are each located in a space between any two light sources which are adjacent in row direction and/or column direction and/or diagonal direction, and the distances between the photosensitive elements and the light sources adjacent to the photosensitive elements are identical.

4. The living body identification device according to claim 3, wherein the distance between two light sources which are adjacent in row or column direction ranges from 50 μ

m to 100 μ

m, the shape of the light sources comprises rectangle, and the length of a side of the light sources ranges from 50 μ

m to 200 μ

m.

5. A living body authentication system, comprising the living body identification device of claim 4.

6. A living body authentication system, comprising the living body identification device of claim 3.

7. The living body identification device according to claim 2, wherein a resolution of the photosensitive elements is more than 500 dpi, and a resolution of the light sources is more than 500 dpi.

8. A living body authentication system, comprising the living body identification device of claim 7.

9. The living body identification device according to claim 2, wherein the light source comprises a light-emitting diode, and the light-emitting diode comprises a white light-emitting diode or a green light-emitting diode.

10. A living body authentication system, comprising the living body identification device of claim 2.

11. The living body identification device according to claim 1, wherein the distance between the acquisition unit and the characteristic position ranges from 1 mm to 10 cm.

12. The living body identification device according to claim 1, wherein the characteristic information comprises vein information, heart rate information, fingerprint information, iris information or face information;

and

the vein information, the heart rate information and the fingerprint information are acquired from a finger, the iris information is acquired from an eye, and the face information is acquired from a face.

13. The living body identification device according to claim 12, wherein an acquisition time duration of the heart rate information ranges from 20 seconds to 30 seconds, and acquisition time durations of the vein information, the fingerprint information, the iris information and the face information are less than 10 seconds.

14. The living body identification device according to claim 1, wherein the processing unit comprises an image generation module, an image processing module and a characteristic information extraction module;

the image generation module is configured for generating the image of the characteristic position according to the electrical signal, and sending the image of the characteristic position to the image processing module;

the image processing module is configured for performing fine calculation on the image of the characteristic position, and sending the processed image of the characteristic position to the characteristic information extraction module; and

the characteristic information extraction module is configured for extracting the characteristic information from the processed image of the characteristic position.

15. The living body identification device according to claim 1, further comprising a storage unit, which is connected to the processing unit and configured for storing the characteristic information which is eventually obtained after the processing of the processing unit.

16. A living body authentication system, comprising the living body identification device of claim 1.

17. The living body authentication system according to claim 16, further comprising a characteristic information database and a matching module;

the characteristic information database is configured for storing characteristic information of a plurality of living bodies; and

the matching module is configured for matching the characteristic information obtained by the living body identification device with characteristic information in the characteristic information database, and authenticating the living body with successful match.

18. A living body identification method using the living body identification device according to claim 1, comprising:

emitting light towards a characteristic position of a living body;

receiving light reflected from the characteristic position, and then converting the light into an electrical signal; and

generating an image of the characteristic position according to the electrical signal, and processing the image of the characteristic position to eventually obtain characteristic information of the characteristic position, the characteristic information being able to uniquely identify the living body.