Method and device for verifying fingerprint

Patent metadata

Field	Value
Publication number	US-10133911-B2
Application number	US-201715444638-A
Country	US
Kind code	B2
Filing date	Feb 28, 2017
Priority date	Feb 29, 2016
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

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.

First claim

What is claimed is:

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,
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.

2. The method according to claim 1 , further comprising:
after sequencing the operation types according to pressing moments of the corresponding N pressing operations, recording a period of time for which each of the N pressing operations is performed to obtain the sequence of operations.

3. 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.

4. 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.

5. The method according to claim 1 , 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.

6. The method according to claim 5 , 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.

7. 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.

8. 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.

9. 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,
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 ver

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Hao Ning
• Wang Yanteng
• Liu Huanhuan

Classifications

• G06V40/1365

  Matching; Classification · CPC title

• G06F21/32 Primary

  using biometric data, e.g. fingerprints, iris scans or voiceprints · CPC title

• G06V10/75

  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 title

• G06K9/0012

  Physics · mapped topic

• G06K9/00006

  Physics · mapped topic