Method and Device for Verifying Fingerprint

• US 20170249497A1
• Filed: 02/28/2017
• Published: 08/31/2017
• Est. Priority Date: 02/29/2016
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Inventors: HAO, Ning, WANG, Yanteng, LIU, Huanhuan
• Granted Patent: US 10,133,911 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06V 10/75 Organisation of the matching processes, e.g. simultaneous or sequential comparisons of image or video features; Coarse-fine approaches, e.g. multi-scale approaches; using context analysis; Selection of dictionaries
• CPC Class Codes: G06V 40/12 Fingerprints or palmprints
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/1394 using acquisition arrangements

Abstract

Methods and devices are provided for verifying a fingerprint in the field of computer technology. The method includes: N pressing operations successively performed by a finger of a user within an area for acquiring the fingerprint are acquired; a sequence of fingerprints to be verified is generated according to fingerprints and pressing intensities of the N pressing operations; the sequence of fingerprints to be verified is compared with a reference sequence of fingerprints; and when the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints, it is determined that the fingerprint of the user is successfully verified.

Claims

1. A method for verifying a fingerprint, comprising:

acquiring N pressing operations successively performed by a finger of a user within an area for acquiring the fingerprint, wherein N>

1;

generating a sequence of fingerprints to be verified according to fingerprints and pressing intensities of the N pressing operations;

comparing the sequence of fingerprints to be verified with a reference sequence of fingerprints; and

determining that the fingerprint of the user is successfully verified when the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints.

2. The method according to claim 1, wherein generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations further comprises:

classifying operation types of the N pressing operations, wherein the pressing operations of which the pressing intensities exceed a preset threshold value belong to a first operation type and the pressing operations of which the pressing intensities do not exceed the preset threshold value belong to a second operation type;

sequencing the operation types according to pressing moments of the corresponding N pressing operations to obtain a sequence of operations; and

generating the sequence of fingerprints to be verified according to the sequence of operations and the fingerprints.

3. The method according to claim 1, wherein generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations further comprises:

classifying operation types of the N pressing operations, wherein the pressing operations of which the pressing intensities exceed a preset threshold value belong to a first operation type and the pressing operations of which the pressing intensities do not exceed the preset threshold value belong to a second operation type;

sequencing the operation types according to pressing moments of the corresponding N pressing operations and recording a period of time for which each of the N pressing operations is performed to obtain a sequence of operations; and

generating the sequence of fingerprints to be verified according to the sequence of operations and the fingerprints.

4. The method according to claim 2, wherein comparing the sequence of fingerprints to be verified with the reference sequence of fingerprints comprises:

comparing the sequence of operations with a sequence of operations corresponding to the reference sequence of fingerprints to determine whether they are the same, and comparing the fingerprints with fingerprints corresponding to the reference sequence of fingerprints to determine whether they are the same; and

determining that the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints when the sequence of operations is the same as the sequence of operations corresponding to the reference sequence of fingerprints and the fingerprints are the same as the fingerprints corresponding to the reference sequence of fingerprints.

5. The method according to claim 1, further comprising:

detecting whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determining that the fingerprint of the user is failed to be verified; and

when the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, triggering the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

6. The method according to claim 3, wherein comparing the sequence of fingerprints to be verified with the reference sequence of fingerprints comprises:

comparing the sequence of operations with a sequence of operations corresponding to the reference sequence of fingerprints to determine whether they are the same, and comparing the fingerprints with fingerprints corresponding to the reference sequence of fingerprints to determine whether they are the same; and

determining that the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints when the sequence of operations is the same as the sequence of operations corresponding to the reference sequence of fingerprints and the fingerprints are the same as the fingerprints corresponding to the reference sequence of fingerprints.

7. The method according to claim 2, further comprising:

detecting whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determining that the fingerprint of the user is failed to be verified; and

when the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, triggering the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

8. The method according to claim 3, further comprising:

detecting whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determining that the fingerprint of the user is failed to be verified; and

when the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, triggering the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

9. The method according to claim 4, further comprising:

detecting whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determining that the fingerprint of the user is failed to be verified; and

when the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, triggering the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

10. A device for verifying a fingerprint, comprising:

a processor; and

a memory configured to store instructions executable by the processor, wherein the processor is configured to;

acquire N pressing operations successively performed by a finger of a user within an area for acquiring the fingerprint, wherein N>

1;

generate a sequence of fingerprints to be verified according to fingerprints and pressing intensities of the N pressing operations;

compare the sequence of fingerprints to be verified with a reference sequence of fingerprints; and

determine that the fingerprint of the user is successfully verified when the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints.

11. The device according to claim 10, wherein the processor is further configured to:

classify operation types of the N pressing operations, wherein the pressing operations of which the pressing intensities exceed a preset threshold value belong to a first operation type and the pressing operations of which the pressing intensities do not exceed the preset threshold value belong to a second operation type;

sequence the operation types according to pressing moments of the corresponding N pressing operations to obtain a sequence of operations; and

generate the sequence of fingerprints to be verified according to the sequence of operations and the fingerprints.

12. The device according to claim 10, wherein the processor is further configured to:

classify operation types of the N pressing operations, wherein the pressing operations of which the pressing intensities exceed a preset threshold value belong to a first operation type and the pressing operations of which the pressing intensities do not exceed the preset threshold value belong to a second operation type;

sequence the operation types according to pressing moments of the corresponding N pressing operations and record a period of time for which each of the N pressing operations is performed to obtain a sequence of operations; and

generate the sequence of fingerprints to be verified according to the sequence of operations and the fingerprints.

13. The device according to claim 11, wherein the processor is further configured to:

compare the sequence of operations with a sequence of operations corresponding to the reference sequence of fingerprints to determine whether they are the same, and compare the fingerprints and fingerprints corresponding to the reference sequence of fingerprints to determine whether they are the same; and

determine that the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints when it is determined that the sequence of operations is the same as the sequence of operations corresponding to the reference sequence of fingerprints and the fingerprints are the same as the fingerprints corresponding to the reference sequence of fingerprints.

14. The device according to claim 10, wherein the processor is further configured to:

detect whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when a result of the detection indicates that the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determine that the fingerprint of the user is failed to be verified; and

when the result of the detection indicates that the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, trigger the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

15. The device according to claim 12, wherein the processor is further configured to:

compare the sequence of operations with a sequence of operations corresponding to the reference sequence of fingerprints to determine whether they are the same, and compare the fingerprints and fingerprints corresponding to the reference sequence of fingerprints to determine whether they are the same; and

determine that the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints when it is determined that the sequence of operations is the same as the sequence of operations corresponding to the reference sequence of fingerprints and the fingerprints are the same as the fingerprints corresponding to the reference sequence of fingerprints.

16. The device according to claim 11, wherein the processor is further configured to:

detect whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when a result of the detection indicates that the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determine that the fingerprint of the user is failed to be verified; and

when the result of the detection indicates that the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, trigger the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

17. The device according to claim 12, wherein the processor is further configured to:

detect whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when a result of the detection indicates that the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determine that the fingerprint of the user is failed to be verified; and

when the result of the detection indicates that the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, trigger the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

18. The device according to claim 13, wherein the processor is further configured to:

detect whether a number of the N pressing operations is the same as a number of pressing operations performed for generating the reference sequence of fingerprints;

when a result of the detection indicates that the number of the N pressing operations is different from the number of pressing operations performed for generating the reference sequence of fingerprints, determine that the fingerprint of the user is failed to be verified; and

when the result of the detection indicates that the number of the N pressing operations is the same as the number of pressing operations performed for generating the reference sequence of fingerprints, trigger the step of generating the sequence of fingerprints to be verified according to the fingerprints and the pressing intensities of the N pressing operations.

19. A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a mobile terminal, cause the mobile terminal to perform:

acquiring N pressing operations successively performed by a finger of a user within an area for acquiring a fingerprint, wherein N>

1;

generating a sequence of fingerprints to be verified according to fingerprints and pressing intensities of the N pressing operations;

comparing the sequence of fingerprints to be verified with a reference sequence of fingerprints; and

determining that the fingerprint of the user is successfully verified when the sequence of fingerprints to be verified is the same as the reference sequence of fingerprints.