Biometric Authentication Device Quality Judgment and Candidate Selection
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Solution Overview
Problem
Biometric authentication devices face inefficiencies due to prolonged processing times when multiple registered biometric images are stored, especially when the input biometric image is unsuitable, leading to increased user inconvenience and wait times.
Innovation Solution
A biometric authentication device that includes a quality judgment unit to assess the suitability of the input biometric image, a selection function to choose similar registered biometric information, and a matching process unit to compare the reacquired biometric information with the selected registered information, reducing the number of comparisons needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the biometric authentication device compares the input biometric information with all registered biometric information, then the authentication comprehensiveness is improved, but the authentication time becomes excessively long
Solution Approach 1:
The system performs preliminary quality judgment on the input biometric image to assess its suitability before proceeding with full authentication. This preliminary assessment allows the system to prepare in advance by identifying potentially matching registered biometric information, so that when full authentication is needed, the comparison can be focused and efficient.
Solution Approach 2:
The authentication process is divided into distinct segments: quality judgment phase, candidate selection phase, and detailed matching phase. By segmenting the process, the system can perform quick quality assessments first, then selectively perform comprehensive comparisons only on promising candidates, rather than comparing with all registered biometric information uniformly.
2Measurement precision
If the input biometric image quality is poor or incomplete, then the biometric information capture is reduced, but requiring reinput increases user inconvenience and wait time
Solution Approach 1:
The system performs self-diagnosis by automatically judging the quality of the captured biometric image. Instead of requiring user intervention to assess image quality, the system autonomously evaluates whether the captured biometric information is sufficient for authentication, and only requests reinput when necessary.
Solution Approach 2:
The system provides feedback to the user about the quality of the captured biometric image through the quality judgment result. This feedback mechanism allows the system to inform users when reinput is needed and when the current input is sufficient, reducing unnecessary reinput requests and improving user experience.
3Measurement precision
If the biometric image is recaptured when the first image is unsuitable, then the authentication accuracy is improved, but the overall processing time increases significantly
Solution Approach 1:
The system performs preliminary quality judgment on the first biometric image to determine suitability before committing to full authentication processing. This preliminary check allows the system to avoid unnecessary full authentication cycles when the image quality is insufficient, and to prepare in advance for potential recapture needs.
Solution Approach 2:
The authentication process is made dynamic and adaptive based on the quality judgment result. When the first image quality is sufficient, the system proceeds directly to authentication without recapture. When quality is insufficient, the system adaptively triggers recapture. This dynamic adjustment optimizes the balance between accuracy and processing time for each individual authentication attempt.
Data Source
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AI summary
A biometric authentication device includes: a biometric information acquisition unit which acquires biometric information of a user and generates a first input biometric image representing the biometric information, a storage unit which stores data relating to registered biometric information of at least one registered user registered in advance, and a processing unit. The processing unit realizes a quality judgment function which judges if the first input biometric image is suitable or not for use for comparison of the biometric information represented in the first input biometric image with the registered biometric information, a selection function which selects registered biometric information which is similar to biometric information represented in the first input biometric image among registered biometric information when the first input biometric image is judged unsuitable, and a matching process function which compares the biometric information represented in a second input biometric image which is generated by reacquisition of the biometric information of the user by the biometric information acquisition unit with the selected registered biometric information.