Fingerprint Sensing Circuit Concurrent Fake Detection
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Solution Overview
Problem
Fingerprint recognition systems face challenges in efficiently differentiating real and fake fingerprints, leading to increased time consumption and reduced user experience due to the need for additional fake fingerprint detection processes.
Innovation Solution
A method and circuit for fingerprint recognition that performs simultaneous first and second exposure and readout operations under different light spot settings, allowing for concurrent fake fingerprint detection during the initial recognition process, and utilizing a fingerprint sensing circuit to perform fake fingerprint recognition independently, reducing overall time consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fake fingerprint detection operations are performed in addition to fingerprint feature identification, then the ability to differentiate real and fake fingerprints is improved, but the overall time consumption increases
Solution Approach 1:
The patent merges the fake fingerprint detection process with the normal fingerprint recognition process by performing both operations simultaneously using the same captured image data. The host processor executes fake fingerprint detection algorithms alongside standard feature identification, combining multiple security checks into a single operational pass rather than sequential processing.
Solution Approach 2:
The system performs preliminary analysis of the captured fingerprint image to identify characteristics that indicate fake fingerprints during the initial image capture phase. By detecting suspicious patterns early in the recognition pipeline, the system can flag potential fakes before completing full feature extraction, reducing the time needed for comprehensive analysis.
2Measurement precision
If multiple fingerprint sensing processes are performed sequentially, then comprehensive fingerprint analysis is achieved, but the user experience deteriorates due to increased time consumption
Solution Approach 1:
The patent maintains continuous processing by overlapping the execution of normal fingerprint recognition and fake fingerprint detection operations. Both processes operate simultaneously on the captured image data without interrupting the user interaction, ensuring that security analysis continues uninterrupted while providing rapid authentication feedback.
Solution Approach 2:
The system dynamically adjusts the processing pipeline by prioritizing critical authentication steps while running fake fingerprint detection in parallel. The host processor dynamically allocates computational resources to maintain both recognition accuracy and fast response time, adapting the processing sequence based on real-time requirements.
Data Source
AI summary
A method of fingerprint recognition for a fingerprint sensing circuit includes steps of: performing a first fingerprint sensing process including a first exposure operation and a first readout operation under a first light spot setting; and performing a second fingerprint sensing process including a second exposure operation and a second readout operation under a second light spot setting. Wherein, a host performs a first fingerprint recognition in response to the first fingerprint sensing process; and wherein, the second light spot setting and the first fingerprint recognition are performed simultaneously.