Fingerprint Verification Terminal Dynamic Resolution Control
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Solution Overview
Problem
Existing fingerprint verification technologies lack flexibility in adjusting security levels and efficiency in fingerprint recognition, particularly in terminals with varying security requirements and usability needs.
Innovation Solution
A terminal and control method that utilize a fingerprint recognition sensor and controller to dynamically adjust fingerprint verification based on security request levels, acquiring low-resolution or small-area fingerprint images and feature information, and determining verification accuracy based on elapsed time and security levels, thereby optimizing verification speed and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution fingerprint images are acquired for all verification requests, then verification accuracy is improved, but processing time increases and usability deteriorates
Solution Approach 1:
The patent changes the resolution parameter of fingerprint image acquisition based on security request levels. For low security levels, low-resolution images are acquired to reduce processing time, while for high security levels, high-resolution images are acquired to ensure verification accuracy. This dynamic parameter adjustment resolves the contradiction between speed and accuracy.
Solution Approach 2:
The system dynamically adjusts verification procedures based on security request levels and time conditions. The controller selectively applies different verification modes (quick verification vs. accurate verification) depending on the situation, making the system adaptable rather than static. This dynamic approach allows the system to optimize between speed and accuracy in real-time.
2Reliability
If high security level verification is applied to all requests, then security is improved, but verification speed decreases and usability deteriorates
Solution Approach 1:
The patent applies different verification qualities to different security contexts. Low security requests receive quick verification with lower accuracy requirements, while high security requests receive accurate verification with strict accuracy requirements. This localized quality adjustment ensures that security is strengthened only where necessary, maintaining overall system productivity.
Solution Approach 2:
The system changes verification parameters (accuracy requirements, image resolution, feature extraction depth) based on security request levels. This allows the system to provide high security when needed while maintaining fast verification for low-security operations, resolving the contradiction between security and speed.
3Measurement precision
If full fingerprint verification procedures are performed, then verification accuracy is improved, but processing complexity and time increase
Solution Approach 1:
The patent segments the verification process into different modes (quick verification and accurate verification) based on security request levels. Each mode uses an appropriate level of complexity - quick verification uses simplified procedures while accurate verification uses full procedures. This segmentation reduces unnecessary complexity in low-security scenarios.
Solution Approach 2:
For low security requests, the system performs partial verification using only essential features and lower-resolution images, which is sufficient for the security level required. This partial action approach avoids the excessive complexity of full verification procedures while maintaining adequate accuracy for the given security context.
Data Source
AI summary
A terminal for checking a security request level of a fingerprint verification request is provided. The terminal includes a fingerprint recognition sensor configured to acquire a fingerprint image; and a controller configured to check a security request level of a fingerprint verification request when the fingerprint verification request is received, to determine an verification level depending on the security request level, and to perform fingerprint verification in a manner corresponding to the verification level by using the fingerprint image. The controller controls the fingerprint recognition sensor to acquire a fingerprint image of a first level when the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request, and an elapsed time from the previous verification request is within a threshold time.