Biometric Authentication Stabilizing 3D Vein Pattern Comparison
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Solution Overview
Problem
Biometric authentication devices face challenges in maintaining accuracy due to fluctuations in user posture, which affect the measurement of three-dimensional vein patterns, leading to degradation in authentication accuracy.
Innovation Solution
A biometric authentication system that calculates and synthesizes three-dimensional shapes of a user's posture from detected biometric information, comparing the calculated shape with stored data to stabilize the authentication process, reducing the impact of posture variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-contact type device is used, then hygiene and user psychological resistance are improved, but posture fluctuation causes degradation of authentication accuracy
Solution Approach 1:
The patent changes the parameter of comparison from raw three-dimensional vein pattern data to normalized data that has been adjusted according to posture information. By transforming the data representation to account for posture variations, the system maintains authentication accuracy while preserving the non-contact operation benefits.
Solution Approach 2:
The patent introduces posture information as feedback to the authentication process. The posture detection unit continuously monitors user posture and provides this information to the authentication determination unit, which then adjusts the comparison process accordingly. This feedback mechanism enables the system to compensate for posture fluctuations in real-time.
2Reliability
If three-dimensional vein pattern is obtained, then authentication capability is enhanced, but posture fluctuation causes data variation and accuracy degradation
Solution Approach 1:
The patent performs preliminary normalization of the three-dimensional vein pattern data according to posture information before the authentication comparison. By preparing and adjusting the data in advance based on detected posture, the system ensures data consistency and eliminates posture-induced variations from affecting authentication results.
Solution Approach 2:
The patent introduces posture information as an intermediary element between the raw vein pattern data and the authentication decision. This intermediary posture data serves as a mediator that explains and compensates for variations in the vein pattern measurements, allowing for stable and reliable authentication despite physical posture changes.
Data Source
AI summary
A biometric authentication device includes: a storage unit configured to store a three-dimensional shape of a posture of a body of a user; a three-dimensional shape calculation unit configured to calculate a three-dimensional shape of a body from biometric information of the user detected by a biometric sensor; a posture calculation unit configured to calculate a posture of the body from the biometric information detected by the biometric sensor; a synthesis unit configured to synthesize a three-dimensional shape from the three-dimensional shape stored in the storage unit in accordance with the posture calculated by the posture calculation unit; and a comparison unit configured to compare the three-dimensional shape calculated by the three-dimensional shape calculation unit with the three-dimensional shape synthesized by the synthesis unit.