Fingerprint Authentication via Segmented Region Allocation
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Solution Overview
Problem
Existing personal authentication systems face challenges in achieving both security reinforcement and authentication accuracy improvement without compromising user convenience, particularly in scenarios where password input is combined with fingerprint authentication.
Innovation Solution
A personal authentication system that includes a detection device with a sensor configured to detect a detection target body and allocate segmented regions for fingerprint image acquisition based on priorities set according to the number of feature points, allowing for accurate fingerprint image synthesis during password input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If password authentication is combined with fingerprint authentication to reinforce security, then security level is improved, but user convenience is degraded due to multiple authentication methods
Solution Approach 1:
The patent combines password authentication and fingerprint authentication into a single integrated system. The detection device detects both the touch position for password input and the fingerprint simultaneously on the same input surface, merging two authentication methods into one unified interface rather than requiring separate authentication devices or steps.
Solution Approach 2:
The input surface serves multiple functions: it acts as both the password input key surface and the fingerprint detection surface. The same physical surface where users press keys for password entry also captures fingerprint images, eliminating the need for separate authentication surfaces and improving user convenience.
2Productivity
If fingerprint detection is performed during password inputting with extremely short touch duration, then authentication speed is improved, but fingerprint reading accuracy deteriorates
Solution Approach 1:
The system performs preliminary actions by continuously capturing fingerprint images during the password input process, even before the user completes the authentication sequence. The detection device captures multiple fingerprint images throughout the typing process, ensuring that sufficient fingerprint data is collected regardless of when the user completes their input.
Solution Approach 2:
The fingerprint detection operates continuously throughout the password inputting process rather than requiring a separate, discrete fingerprint capture step. The detection device continuously captures fingerprint images while the user types their password, ensuring uninterrupted and comprehensive fingerprint data collection without adding extra time to the authentication process.
3Measurement precision
If multiple segmented regions are created for fingerprint image acquisition based on touch position, then authentication accuracy is improved, but device complexity increases
Solution Approach 1:
The detection device divides the input surface into multiple segmented regions based on the detected touch position. When a user touches a specific key area, the system segments the fingerprint detection area accordingly and captures only the relevant portion of the fingerprint image, improving accuracy by focusing on the correct region rather than capturing the entire fingerprint.
Solution Approach 2:
The system applies different detection parameters and processing methods to different segmented regions of the fingerprint image based on where the user touched. Each segmented region is processed according to its specific location and characteristics, allowing optimized fingerprint analysis for each key area while maintaining overall system simplicity through automated region-based processing.
Data Source
AI summary
A first period when detection of a detection target body in contact with or proximity to a sensor is performed and a second period when detection of asperities on a surface of the detection target body is performed are set. First regions are set in a detection region of the sensor as input keys for a password. In the first period, one of segmented regions obtained by dividing a second region the center of which corresponds to coordinates of a touch detection position when the touch detection position for inputting of the password is detected in one of the first regions. In the second period, based on priorities set in advance according to the number of feature points of the detection target body, a segmented image detected in the segmented region for the inputting is output, and a certain number of segmented images are synthesized to generate a fingerprint image.