Screen Unlocking Method for Electronic Terminal, Image Acquiring Method and Electronic Terminal

• US 20180082048A1
• Filed: 11/28/2017
• Published: 03/22/2018
• Est. Priority Date: 03/16/2016
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Inventors: Yang, Le, Zhou, Yibao
• Granted Patent: US 10,289,818 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04W 12/06 Authentication

Abstract

A screen unlocking method of an electronic terminal is provided as follows. Recorded debug parameters used for selecting target fingerprint images in the most recent N instances are counted, to determine a most frequently used debug parameter, where N is a natural number. Current debug parameters are adjusted based on the most frequently used debug parameter, to debug fingerprint images currently acquired. A target fingerprint image is selected from the fingerprint images debugged. Whether the target fingerprint image satisfies an unlocking condition is identified and a screen of the electronic terminal is unlocked when the unlocking condition is satisfied. Accordingly, an image acquiring method and an electronic terminal are also provided.

Claims

1. A method for screen unlocking of an electronic terminal, comprising:

counting recorded debug parameters used for selecting target images in the most recent N instances to determine a most frequently used debug parameter, wherein N is a natural number;

adjusting current debug parameters based on the most frequently used debug parameter to debug images currently acquired;

selecting a target image from the debugged images; and

identifying whether the target image satisfies an unlocking condition, and when the unlocking condition is satisfied, unlocking a screen of the electronic terminal.

2. The method of claim 1, wherein selecting the target image from the debugged images comprises:

comparing signal-to-noise ratios of the debugged images; and

selecting an image with the largest signal-to-noise ratio as the target image.

3. The method of claim 1, wherein the electronic terminal is provided with a dome button and screen unlocking is triggered by pressing the dome button with a finger of a user;

and the method further comprises;

triggering the operation of counting the recorded debug parameters used for selecting the target images in the most recent N instances to determine the most frequently used debug parameter, when a finger-touch is detected by the dome button before receiving an operation instruction of pressing the dome button.

4. The method of claim 3, wherein identifying whether the target image satisfies the unlocking condition and when the unlocking condition is satisfied, unlocking the screen of the electronic terminal comprises:

identifying whether the target image matches with a preset image for unlocking authentication; and

unlocking and lighting up the screen of the electronic terminal, when the target image is matched and the operation instruction of pressing the dome button is received.

5. The method of claim 1, wherein the debug parameters comprise at least one of a gain parameter, an analog-to-digital converter (ADC) parameter, and a pixel gain parameter.

6. The method of claim 1, wherein counting recorded debug parameters used for selecting the target images in the most recent N instances comprises:

counting the recorded debug parameters used for selecting the target images in the most recent N instances and ranking the recorded debug parameters in a descending order according to the frequency of use.

7. The method of claim 6, further comprising:

prior to selecting the target image from the debugged images and after adjusting current debug parameters based on the most frequently used debug parameter;

adjusting the current debug parameters by using other debug parameters except the most frequently used parameter of the ranked recorded debug parameters sequentially.

8. The method of claim 1, wherein the target image is an image having the highest clarity or having a clarity greater than a threshold.

9. A method for image acquiring, comprising:

acquiring images through a fingerprint identification sensor;

counting recorded debug parameters used for selecting target images in the most recent N instances to determine a most frequently used debug parameter, wherein N is a natural number;

adjusting debug parameters for acquiring the images, based on the most frequently used debug parameter to debug the images acquired; and

selecting a target image from the debugged images.

10. The method of claim 9, wherein selecting the target image from the debugged images comprises:

comparing signal-to-noise ratios of the debugged images; and

selecting an image with the largest signal-to-noise ratio as the target image.

11. An electronic terminal, comprising

a memory, configured to store executable program codes;

and

a processor, coupled to the memory, wherein the processor is configured to invoke the executable program codes stored in the memory to perform;

a counting unit, configured to count recorded debug parameters used for selecting target images in the most recent N instances, to determine a most frequently used debug parameter, wherein N is a natural number;

an adjusting and debugging unit, configured to adjust debug parameters currently used for acquiring images, based on the most frequently used debug parameter, to debug the images currently acquired;

a selecting unit, configured to select a target image from the debugged images; and

an identifying and unlocking unit, configured to identify whether the target image satisfies an unlocking condition, and to unlock a screen of the electronic terminal when the unlocking condition is satisfied.

12. The electronic terminal of claim 11, wherein the selecting unit comprises:

a comparing unit, configured to compare signal-to-noise ratios of the debugged images; and

an image selecting unit, configured to select an image with the largest signal-to-noise ratio as the target image.

13. The electronic terminal of claim 11, wherein the electronic terminal further comprises:

a dome button, configured to receive at least one of a touch operation and a press operation of a finger of a user.

14. The electronic terminal of claim 13, further comprising:

a triggering unit, configured to trigger the counting unit to count the recorded debug parameters used for selecting the target images in the most recent N instances to determine the most frequently used debug parameter, when a touch-operation is detected by the dome button before a press-operation is received.

15. The electronic terminal of claim 13, wherein the identifying and unlocking unit comprises:

an identifying and matching unit, configured to identify whether the target image matches with a preset image for unlocking authentication; and

an unlocking and lighting up unit, configured to unlock and light up the screen of the electronic terminal when the target image is matched and an operation instruction of pressing the dome button is received.

16. The electronic terminal of claim 11, wherein the debug parameters comprise at least one of a gain parameter, an ADC parameter, and a pixel gain parameter.

17. The electronic terminal of claim 11, wherein the counting unit is further configured to rank the recorded debug parameters in a descending order according to the frequency of use.

18. The electronic terminal of claim 17, wherein the adjusting and debugging unit is further configured to adjust debug parameters currently used for acquiring images by using other debug parameters except the most frequently used parameter of the ranked recorded debug parameters sequentially.