Composite Fingerprint Authentication via Thermal Scanner
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Solution Overview
Problem
Conventional fingerprint authentication methods are limited in securely authenticating composite fingerprints, which are more difficult to duplicate and observe, as they involve thermal impressions that naturally disappear as the body re-establishes homeostasis, and existing systems struggle to efficiently process and match the unique thermal images of combined finger prints.
Innovation Solution
A computer-implemented method and system that utilizes a thermal scanner to generate and authenticate composite fingerprints by processing thermal images of a reference finger with a thermal impression of another finger, employing pre-processing techniques like ridge thinning and minutiae extraction to convert gray scale values into binary representations for secure authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal scanning is used to capture composite fingerprints, then security is improved by creating unique thermal impressions that naturally disappear, but device complexity increases due to the need for thermal scanning capabilities and specialized processing
Solution Approach 1:
The patent combines multiple fingerprint images (reference fingerprint and thermal impression) into a single composite fingerprint image. This merging approach creates a more secure authentication mechanism by requiring both fingerprints to be present simultaneously, while the composite image is processed as a unified data structure rather than separate components.
Solution Approach 2:
The system captures thermal parameters (temperature differences) in addition to visual fingerprint parameters. By incorporating thermal imaging capabilities that detect temperature variations between ridges and valleys, the system transforms ordinary visual fingerprint data into enhanced composite data that includes thermal characteristics, thereby improving security without requiring entirely new hardware paradigms.
2Measurement precision
If composite fingerprints are processed and matched, then authentication accuracy is improved by verifying multiple finger characteristics, but processing time increases due to the complexity of thermal image analysis and minutiae extraction
Solution Approach 1:
The system performs preliminary processing of the composite fingerprint image by extracting minutiae points (ridge endings, bifurcations) and creating a standardized representation before comparison. This pre-processing step converts the complex thermal image into a simplified feature set that can be rapidly matched against stored templates, reducing the time required for actual authentication while maintaining high accuracy.
Solution Approach 2:
The authentication process is divided into distinct segments: image acquisition, pre-processing, minutiae extraction, and matching. By segmenting the complex task of composite fingerprint verification into manageable stages, the system can optimize each step independently and parallelize certain operations, thereby reducing overall processing time while maintaining comprehensive verification accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances security by creating a unique composite fingerprint that is harder to duplicate, reduces security risks through local processing of extracted information, and provides efficient authentication by matching thermal impressions of combined fingers, ensuring accurate and reliable access control.
Implementation Method 1
Thermal scanning uses temperature differences between the scanned ridges and valleys of a finger to generate the fingerprint. The scanning device includes a thermal resolution sufficient to sense the differences between temperatures of the ridges and temperatures of the valleys.
Data Source
AI summary
A computer-implemented method for authenticating a composite fingerprint includes executing on a computer processor the step of receiving the composite fingerprint, wherein the composite fingerprint is a thermal image of a reference finger with a thermal impression of another finger from a thermal scanner. The composite fingerprint is authenticated according to a known fingerprint of the reference finger and a known fingerprint of the other finger. A result of the authentication is returned.