Fingerprint Sensor Background Image Subtraction Authentication
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Solution Overview
Problem
Existing fingerprint sensor systems often require multiple attempts and unnecessary fingerprint scans, leading to user frustration and increased power consumption, as they fail to optimally handle changing background conditions and do not provide timely feedback for unsuccessful authentication attempts.
Innovation Solution
The system performs a first authentication process on current fingerprint image data and, if unsuccessful, obtains non-digit image data after the digit is removed, using this data for a second authentication process without requiring additional fingerprint scans, and provides visual or haptic feedback to the user accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system performs multiple fingerprint scans after an unsuccessful authentication attempt, then the authentication reliability is improved, but the power consumption increases and user experience deteriorates
Solution Approach 1:
The system performs a preliminary action by capturing a background image before the fingerprint scan. This background image is stored and later used to process the fingerprint image data, eliminating the need for additional fingerprint scans after failed authentication attempts. The preliminary capture of background data enables subsequent authentication to be completed using only the originally captured fingerprint image, thereby reducing power consumption while maintaining authentication reliability.
2Reliability
If the system requires multiple fingerprint scans for authentication, then the authentication accuracy is improved, but the time required for authentication increases
Solution Approach 1:
The system performs a preliminary action by capturing and storing a background image before the fingerprint scan. This pre-captured background image is then used to process the fingerprint image data through image subtraction, enabling accurate authentication without requiring additional fingerprint scans. This approach maintains high authentication accuracy while significantly reducing the time required for the authentication process.
3Ease of operation
If the system provides immediate feedback for unsuccessful authentication, then the user experience is improved, but the system complexity increases
Solution Approach 1:
The system implements a feedback mechanism that provides users with information about authentication status. After processing the fingerprint image data using the pre-captured background image, the system determines authentication success or failure and communicates this to the user through appropriate interface elements. This feedback approach improves user experience by providing timely information while managing system complexity through efficient use of existing system components.
Data Source
AI summary
Some disclosed methods may involve receiving an indication of a digit touching a surface of an apparatus in an active fingerprint sensor area, obtaining current fingerprint image data from the digit and performing a first authentication process based, at least in part, on the current fingerprint image data. Responsive to determining that the first authentication process is an unsuccessful authentication process, some methods may involve obtaining non-digit image data after the digit has been removed from the surface, performing a second authentication process based, at least in part, on the non-digit image data and providing a notification regarding the outcome of the second authentication process. In some examples, the non-digit image data may be obtained and the second authentication process may be performed without providing a notification regarding the unsuccessful outcome of the first authentication process.