Fingerprint recognition methods and electronic device

• US 9,507,994 B1
• Filed: 08/12/2015
• Issued: 11/29/2016
• Est. Priority Date: 09/18/2014
• Status: Active Grant

• Current Assignee: Egis Technology Inc.
• Original Assignee: Egis Technology Inc.
• Inventors: Chiang, Yuan-Lin, Cheng, Yu-Chun
• Primary Examiner(s): Patel, Jayesh A
• Application Number:
  US14/825,086
• Time in Patent Office: 475 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06V 30/248 involving plural approaches, e.g. verification by template match; Resolving confusion among similar patterns, e.g. "O" versus "Q" G06V30/242 takes precedence
• CPC Class Codes: G06V 40/1365 Matching; Classification

Abstract

An electronic device and fingerprint-recognition method are provided. The method includes: transmitting first part registered fingerprint datasets to the first processing unit; obtaining second part registered fingerprint datasets; obtaining a verification fingerprint image; transmitting the verification fingerprint image to the first processing unit to generate verification fingerprint data; dividing the verification fingerprint data into first part and second part verification fingerprint data; comparing the verification fingerprint data with the registered fingerprint datasets to generate a first matching result and matching information; transmitting the first matching result, the first part verification fingerprint data and the matching information to the second processing unit; comparing the first part verification fingerprint data with one of the first part registered fingerprint datasets to generate a second matching result according to the matching information; and comparing the first matching result and the second matching result to verify the verification fingerprint data.

Claims

1. A fingerprint-recognition method, applied to an electronic device, the electronic device comprising a storage unit, a Trust-Zone comprising a first processing unit and a Security Element comprising a second processing unit, the fingerprint-recognition method comprising:

transmitting first part registered fingerprint datasets to the first processing unit by the second processing unit;

obtaining second part registered fingerprint datasets from the storage unit by the first processing unit;

obtaining complete registered fingerprint datasets according to the first part registered fingerprint datasets and the second part registered fingerprint datasets;

obtaining a verification fingerprint image;

transmitting the verification fingerprint image to the first processing unit;

generating verification fingerprint data according to the verification fingerprint image by the first processing unit;

dividing the verification fingerprint data into first part verification fingerprint data and second part verification fingerprint data;

comparing the verification fingerprint data with the complete registered fingerprint datasets to generate a first matching result and matching information by the first processing unit;

transmitting a first part of the first matching result, the first part verification fingerprint data and the matching information from the first processing unit to the second processing unit;

comparing the first part verification fingerprint data with one of the first part registered fingerprint datasets to generate a second matching result by the second processing unit according to the matching information; and

comparing the first part of the first matching result and the second matching result so as to verify the verification fingerprint data by the second processing unit.

2. The fingerprint recognition method of claim 1, further comprising:

obtaining a plurality of fingerprint images;

generating the complete registered fingerprint datasets according to the fingerprint images by the first processing unit;

dividing each of the complete registered fingerprint datasets into the first part registered fingerprint datasets and the second part registered fingerprint datasets;

storing the first part registered fingerprint datasets in the Security Element; and

storing the second part registered fingerprint datasets in the storage unit.

3. The fingerprint recognition method of claim 1, further comprising:

obtaining a matching fingerprint template from the plurality of registered fingerprint datasets by the first processing unit.

4. The fingerprint recognition method of claim 3, wherein the matching information comprises an index corresponding to the matching fingerprint template included in the complete registered fingerprint datasets.

5. The fingerprint recognition method of claim 3, wherein the matching information comprises matching details between the verification fingerprint data and the matching fingerprint template, wherein the matching details comprise offset information and rotation information between the verification fingerprint data and the matching fingerprint template.

6. The fingerprint recognition method of claim 1, further comprising:

storing the first part verification fingerprint data of the verification fingerprint data in the Security Element and storing the second part verification fingerprint data of the verification fingerprint data in the storage unit after the verification fingerprint data is verified.

7. An electronic device, comprising:

a fingerprint sensor, configured to obtain a verification fingerprint image;

a Trust-Zone, comprising;

a first processing unit, configured to receive the verification fingerprint image from the fingerprint sensor, generate verification fingerprint data according to the verification fingerprint image, and divide the verification fingerprint data into a first part verification fingerprint data and a second part verification fingerprint data;

a first storage unit, configured to store second part registered fingerprint datasets and provide the second part registered fingerprint datasets to the first processing unit; and

a Security Element, comprising;

a second storage unit, configured to store first part registered fingerprint datasets; and

a second processing unit, configured to transmit the first part registered fingerprint datasets to the first processing unit,

wherein the first processing unit further obtains complete registered fingerprint datasets according to the first part registered fingerprint datasets and the second part registered fingerprint datasets

wherein the first processing unit compares the verification fingerprint data with the complete registered fingerprint datasets to generate a first matching result and matching information and transmits a first part of the first matching result, the first part verification fingerprint and the matching information to the second processing unit,

wherein the second processing unit compares the first part verification fingerprint data with one of the first part registered fingerprint datasets to generate a second matching result according to the matching information and compares the first part of the first matching result and the second matching result so as to verify the verification fingerprint data by the second processing unit.

8. The electronic device of claim 7, wherein the first processing unit further obtains a plurality of fingerprint images, generates the complete registered fingerprint datasets according to the fingerprint images, divides each of the complete registered fingerprint datasets into the first part registered fingerprint datasets and the second part registered fingerprint datasets, and stores the first part registered fingerprint datasets in the second storage unit, and stores the second part registered fingerprint datasets in the first storage unit.

9. The electronic device of claim 7, wherein the first processing unit further obtains a matching fingerprint template from the plurality of registered fingerprint datasets by the first processing unit.

10. The electronic device of claim 9, wherein the matching information comprises an index corresponding to the matching fingerprint template included in the complete registered fingerprint datasets.

11. The electronic device of claim 9, wherein the matching information comprises matching details between the verification fingerprint data and the matching fingerprint template, wherein the matching details comprise offset information and rotation information between the verification fingerprint data and the matching fingerprint template.

12. The electronic device of claim 7, wherein the first processing unit further stores the first part verification fingerprint data of the verification fingerprint data in the second storage unit and store the second part verification fingerprint data of the verification fingerprint data in the first storage unit after the verification fingerprint data is verified.