Fingerprint Authentication Partial Data Selection
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Solution Overview
Problem
Fingerprint authentication systems with small-size sensors face high false rejection rates due to reduced fingerprint information, leading to increased authentication processing time and manufacturing costs when multiple partial fingerprint data are registered for authentication.
Innovation Solution
A method and device for rapidly selecting optimal reference comparison data among partial fingerprint registration data, using a predetermined threshold to determine matching rates and selecting new reference data based on these rates to improve authentication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple partial fingerprint data are registered for authentication, then authentication performance is improved, but authentication processing time increases
Solution Approach 1:
The patent divides fingerprint data into multiple partial fingerprint data segments (first partial fingerprint data, second partial fingerprint data, etc.) corresponding to different regions of the fingerprint. By segmenting the authentication process and comparing measurement data with corresponding partial registration data, the system achieves accurate authentication without processing the entire fingerprint dataset, thus reducing processing time while maintaining authentication performance.
Solution Approach 2:
The patent extracts and uses only the necessary partial fingerprint data for authentication comparison. Instead of processing all registered fingerprint data, the system identifies and compares only the relevant partial fingerprint data that corresponds to the measured fingerprint region, extracting the essential information needed for authentication while discarding unnecessary data processing.
2Area of stationary object
If a small-size fingerprint sensor is used, then manufacturing cost and space are reduced, but false rejection rate increases
Solution Approach 1:
The patent segments the fingerprint authentication process into multiple partial fingerprint comparisons. By dividing the fingerprint data into regions and comparing measurement data with corresponding partial registration data from different regions, the system compensates for the limited sensing area of small sensors, reducing false rejections while maintaining small sensor size.
Solution Approach 2:
The patent transitions from comparing complete fingerprint data in a single dimension to comparing multiple partial fingerprint data segments across different regions. This dimensional approach allows the system to accumulate sufficient authentication information even when each individual sensor capture is limited, thereby reducing false rejection rates with small sensors.
3Reliability
If multiple partial fingerprint data are registered, then authentication accuracy is improved, but device complexity increases
Solution Approach 1:
The patent simplifies device complexity by segmenting the authentication process into structured partial fingerprint comparisons. The control unit is designed to systematically compare measurement data with corresponding partial registration data from different regions, creating a manageable and organized processing framework that maintains accuracy without excessive complexity.
Solution Approach 2:
The patent applies preliminary action by pre-registering and organizing multiple partial fingerprint data segments in structured regions during the registration phase. This preliminary organization of data allows the authentication process to proceed efficiently by simply comparing measurement data with the pre-arranged partial registration data, reducing real-time processing complexity while maintaining high accuracy.
Data Source
AI summary
A fingerprint authentication method includes a first step of acquiring partial fingerprint measurement data for a part of a fingerprint, and a second step of calculating a matching rate by comparing the partial fingerprint measurement data with reference comparison data selected among a plurality of partial fingerprint registration data, each partial fingerprint registration data corresponding to a part of a fingerprint. The method further includes a third step of determining whether the matching rate is equal to or greater than an authentication threshold and a fourth step of determining, based on a result in the third step, a success of the authentication, or repeating the second and third steps by selecting new reference comparison data based on whether or not the matching rate is equal to or greater than a preset threshold smaller than the authentication threshold.