Method For Screen Unlocking, Method For Image Acquiring, And Electronic Terminal

• US 20180268117A1
• Filed: 05/24/2018
• Published: 09/20/2018
• 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 10,346,597 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 method for screen unlocking, a method for image acquiring, and an electronic terminal are provided. In the method for screen unlocking, a most frequently used debug parameter is counted according to recorded debug parameters used for image selection in the most recent N instances. Auto-adjustment is performed on the debug parameters from the most frequently used debug parameter, and an image current acquired is debugged with the debug parameters adjusted, to obtain debugged images. A target fingerprint image is selected from the debugged images. Whether the target image satisfies an unlocking condition is identified and a screen of the electronic terminal is unlocked when the unlocking condition is satisfied. Accordingly, a method for image acquiring and an electronic terminal are also provided.

Claims

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

counting a most frequently used debug parameter according to recorded debug parameters used for image selection in the most recent N instances, wherein N is a natural number and the debug parameters comprise capacity auto control (CAC) parameters;

wherein the debug parameters are adjusted for several times when the electronic terminal acquires a fingerprint image entered by a user through an acquiring module, to process the fingerprint image acquired with the debug parameters adjusted each time, to select a target fingerprint image;

wherein the CAC parameters comprise at least one of a gain parameter, an analog-to-digital converter (ADC) parameter, and a pixel gain parameter;

performing auto-adjustment on the debug parameters from the most frequently used debug parameter, and debugging an image current acquired with the debug parameters adjusted, to obtain debugged images;

selecting a target image from the debugged images; and

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

2. The method of claim 1, wherein the selecting a 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;

wherein the method further comprises the follows when the electronic terminal is in a screen-off lock-screen state;

triggering the counting a most frequently used debug parameter according to recorded debug parameters used for image selection in the most recent N instances, when a finger-touch is detected through the dome button before receiving an operation instruction of pressing the dome button.

4. The method of claim 3, wherein the identifying whether the target image satisfies an unlocking condition, and the unlocking a screen of the electronic terminal when the unlocking condition is satisfied 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. A method for image acquiring, comprising:

acquiring images through an acquiring module;

counting a most frequently used debug parameter according to recorded debug parameters used for image selection in the most recent N instances, wherein N is a natural number and the debug parameters comprise CAC parameters;

wherein the debug parameters are adjusted for several times when the electronic terminal acquires a fingerprint image entered by a user through an acquiring module, to process the fingerprint image acquired with the debug parameters adjusted each time, to select a target fingerprint image;

wherein the CAC parameters comprise at least one of a gain parameter, an ADC parameter, and a pixel gain parameter;

performing auto-adjustment on the debug parameters from the most frequently used debug parameter, and debugging an image current acquired with the debug parameters adjusted, to obtain debugged images; and

selecting a target image from the debugged images.

6. The method of claim 5, wherein the selecting a 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.

7. An electronic terminal, comprising:

a first counting module, configured to count a most frequently used debug parameter according to recorded debug parameters used for image selection in the most recent N instances, wherein N is a natural number and the debug parameters comprise CAC parameters;

wherein the debug parameters are adjusted for several times when the electronic terminal acquires a fingerprint image entered by a user through an acquiring module, to process the fingerprint image acquired with the debug parameters adjusted each time, to select a target fingerprint image;

wherein the CAC parameters comprise at least one of a gain parameter, an ADC parameter, and a pixel gain parameter;

a first adjusting and debugging module, configured to perform auto-adjustment on the debug parameters from the most frequently used debug parameter, and debugging an image current acquired with the debug parameters adjusted, to obtain debugged images;

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

an identifying and unlocking module, 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.

8. The electronic terminal of claim 7, wherein the first selecting module comprises:

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

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

9. The electronic terminal of claim 7, wherein the electronic terminal is provided with a dome button and screen unlocking may be triggered by pressing the dome button with a finger of a user;

wherein the electronic terminal further comprises the follows when the electronic terminal is in a screen-off lock-screen state;

a triggering module, configured to trigger counting the most frequently used debug parameter according to recorded debug parameters used for image selection in the most recent N instances, when a finger-touch is detected through the dome button before receiving an operation instruction of pressing the dome button.

10. The electronic terminal of claim 9, wherein the identifying and unlocking module comprises:

an identifying and comparing 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 identifying and comparing unit identifies that the target image is matched and the operation instruction of pressing the dome button is received.