METHOD AND APPARATUS FOR IDENTIFYING FINGERPRINT LOGO AND ELECTRONIC DEVICE

• US 20200134289A1
• Filed: 12/06/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Shenzhen Goodix Technology Co., Ltd.
• Original Assignee: Shenzhen Goodix Technology Co., Ltd.
• Inventors: LI, Yong
• Granted Patent: US 10,997,393 B2
• Time in Patent Office: Days
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1353 Extracting features related to minutiae or pores
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/63 by static guides

Abstract

Provided are a method and apparatus for identifying a fingerprint logo and an electronic device. The method for identifying the fingerprint logo includes: acquiring, before an optical sensor captures a fingerprint image, first optical signals captured by the optical sensor in at least one first region respectively, where the first optical signals captured in the at least one first region form a first image, and the at least one first region corresponds to a partial region of a photosensitive surface of the optical sensor; and identifying whether there is a fingerprint logo for guiding a user to perform pressing in the first image according to the first optical signals captured in the at least one first region.

Claims

1. A method for identifying a fingerprint logo, comprising:

acquiring, before an optical sensor captures a fingerprint image, first optical signals captured by the optical sensor in at least one first region respectively, wherein the first optical signals captured in the at least one first region form a first image, and the at least one first region corresponds to a partial region of a photosensitive surface of the optical sensor; and

identifying whether there is a fingerprint logo for guiding a user to perform pressing in the first image according to the first optical signals captured in the at least one first region.

2. The method according to claim 1, wherein the identifying whether there is the fingerprint logo for guiding the user to perform pressing in the first image according to the first optical signals captured in the at least one first region comprises:

determining light intensity information of the at least one first region respectively according to the first optical signals captured in the at least one first region; and

determining that there is the fingerprint logo in the first image if there is light intensity information greater than a first threshold in the light intensity information of the at least one first region;

or

determining that there is not the fingerprint logo in the first image if there is not light intensity information greater than a first threshold in the light intensity information of the at least one first region.

3. The method according to claim 2, wherein before determining the light intensity information of the at least one first region respectively, the method further comprises:

performing consistency and/or binarization processing on the first optical signals captured in the at least one first region.

4. The method according to claim 2, wherein the light intensity information is at least one of optical signal mean, optical signal standard deviation, optical signal variance, and optical signal weight ratio.

5. The method according to claim 2, wherein the method further comprises:

configuring the first threshold.

6. The method according to claim 1, wherein the method further comprises:

dividing each first region into a plurality of sub-regions, wherein each of the sub-regions corresponds to a plurality of pixel points of the optical sensor; and

the identifying whether there is the fingerprint logo for guiding the user to perform pressing in the first image according to the first optical signals captured in the at least one first region comprises;

determining difference information between different sub-regions of the plurality of sub-regions according to the first optical signals of each of the sub-regions; and

identifying whether there is the fingerprint logo in the first image according to the difference information between the different sub-regions of the plurality of sub-regions.

7. The method according to claim 6, wherein the determining the difference information between the different sub-regions of the plurality of sub-regions according to the first optical signals of each of the sub-regions comprises:

determining light intensity information of each of the sub-regions according to the first optical signals of each of the sub-regions; and

determining the difference information between the different sub-regions of the plurality of sub-regions according to the light intensity information of each of the sub-regions.

8. The method according to claim 7, wherein before determining the light intensity information of each of the sub-regions, the method further comprises:

performing consistency and/or binarization processing on the first optical signals captured in the plurality of sub-regions.

9. The method according to claim 7, wherein the light intensity information is at least one of optical signal mean, optical signal standard deviation, optical signal variance, and optical signal weight ratio.

10. The method according to claim 6, wherein the plurality of sub-regions have different locations and/or shapes.

11. The method according to claim 1, wherein the fingerprint logo comprises at least one type of fingerprint logo.

12. The method according to claim 11, wherein the method further comprises:

determining the at least one first region according to location information of the fingerprint logo and current type of the fingerprint logo.

13. The method according to claim 1, wherein if there is not the fingerprint logo in the first image, the method further comprises:

controlling the optical sensor to capture a fingerprint image.

14. The method according to claim 1, wherein if there is the fingerprint logo in the first image, the method further comprises:

acquiring second optical signals captured by the optical sensor in the at least one first region respectively, wherein the second optical signals captured in the at least one first region form a second image; and

identifying whether there is the fingerprint logo in the second image according to the second optical signals captured in the at least one first region.

15. An apparatus for identifying a fingerprint logo, comprising:

an acquiring unit, configured to acquire, before an optical sensor captures a fingerprint image, first optical signals captured by the optical sensor in at least one first region respectively, wherein the first optical signals captured in the at least one first region form a first image, and the at least one first region corresponds to a partial region of a photosensitive surface of the optical sensor; and

a processing unit, configured to identify whether there is a fingerprint logo for guiding a user to perform pressing in the first image according to the first optical signals captured in the at least one first region.

16. The apparatus according to claim 15, wherein the processing unit is configured to:

determine light intensity information of the at least one first region respectively according to the first optical signals captured in the at least one first region; and

determine that there is the fingerprint logo in the first image if there is light intensity information greater than a first threshold in the light intensity information of the at least one first region;

or

determine that there is not the fingerprint logo in the first image if there is not light intensity information greater than a first threshold in the light intensity information of the at least one first region.

17. The apparatus according to claim 15, wherein the processing unit is further configured to divide each first region into a plurality of sub-regions, wherein each of the sub-regions corresponds to a plurality of pixel points of the optical sensor;

and

the processing unit is configured to;

determine difference information between different sub-regions of the plurality of sub-regions according to the first optical signals of each of the sub-regions; and

identify whether there is the fingerprint logo in the first image according to the difference information between the different sub-regions of the plurality of sub-regions.

18. The apparatus according to claim 17, wherein the processing unit is configured to:

determine light intensity information of each of the sub-regions according to the first optical signals of each of the sub-regions; and

determine the difference information between the different sub-regions of the plurality of sub-regions according to the light intensity information of each of the sub-regions.

19. The apparatus according to claim 15, wherein the processing unit is further configured to:

determine the at least one first region according to location information of the fingerprint logo and current type of the fingerprint logo.

20. The apparatus according to claim 15, wherein if there is not the fingerprint logo in the first image, the processing unit is further configured to control the optical sensor to capture a fingerprint image.