Palm Authentication Surface Correction for Posture Tolerance
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Solution Overview
Problem
Biometric authentication systems often require users to maintain a precise posture, leading to user frustration and inconvenience due to frequent guidance needs, especially when determining whether guidance is necessary or not.
Innovation Solution
An authentication apparatus and method that includes a surface information correcting unit to analyze and correct surface information from image data, reducing the need for frequent posture guidance by stabilizing biometric information and accounting for environmental changes, using a sensor unit to extract and analyze palm vein patterns and provide appropriate guidance when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system frequently guides the user to adjust posture during authentication, then the authentication precision is improved, but the ease of operation deteriorates due to user frustration and inconvenience
Solution Approach 1:
The system performs preliminary analysis of the captured image to evaluate surface information (such as palm flatness, finger extension, and posture correctness) before triggering guidance. By pre-assessing whether the posture is adequate for authentication, the system avoids unnecessary guidance interruptions while ensuring precision when needed.
Solution Approach 2:
The system provides feedback to the user about their posture based on image analysis, guiding them to adjust only when necessary. This feedback mechanism balances precision requirements with user convenience by informing users of posture issues and offering corrective guidance only when the detected posture falls outside acceptable ranges.
2Measurement precision
If the system requires precise posture for authentication, then the authentication accuracy is improved, but the adaptability deteriorates as users cannot authenticate in natural positions
Solution Approach 1:
The system dynamically adjusts its posture requirements and guidance based on the analyzed image quality and surface information. Rather than enforcing a single rigid posture, the system adapts its acceptance criteria based on the detected conditions, allowing authentication in various natural positions while maintaining accuracy through intelligent evaluation.
Solution Approach 2:
The system changes evaluation parameters based on the detected posture and image quality. By adjusting the thresholds and criteria for acceptable authentication based on real-time image analysis, the system maintains high accuracy while accommodating natural variations in user positioning and posture.
3Measurement precision
If the system provides detailed posture guidance, then the authentication precision is improved, but the device complexity increases due to multiple analysis and evaluation components
Solution Approach 1:
The image processing unit serves multiple functions: capturing the authentication target, analyzing surface information, evaluating posture correctness, and providing guidance. By making the imaging system multi-functional, the patent avoids adding separate complex analysis devices while achieving high authentication precision through integrated processing.
Solution Approach 2:
The system uses its own captured image to perform self-analysis and self-evaluation of posture conditions. Rather than requiring external sensors or additional analysis equipment, the authentication device processes its own captured data to determine whether guidance is needed, reducing overall system complexity while maintaining precision.
Data Source
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AI summary
To extend tolerance of posture of a living body so as to reduce guidance frequency around the the boundary of whether guidance of the living body to a proper posture is needed or not. An authentication apparatus (1) performs identity authentication by comparing and matching image information of a palm captured by a sensor unit with a preliminarily registered template. A surface information correcting unit (4) corrects concavity/convexity of a palm surface for surface information that allows the concavity/convexity thereof to be evaluated. The surface information is extracted by a surface information extraction unit (2) from the image information obtained by capturing the palm. When the surface information is not corrected by the surface information correcting unit (4) or not used for authentication by an authentication unit (5) even after correction, the authentication apparatus (1) newly obtains image information of the palm. Correction by the surface information correcting unit (4) reduces opportunities for the authentication apparatus (1) to perform notification to guide the palm to a proper posture.