Biometric Authentication Using Surface Pattern Feature Points

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Solution Overview

Problem

Vein authentication in portable devices faces challenges in stabilizing the position of the body region against the sensor, leading to varying photographing ranges and points, making it difficult to efficiently compare vein patterns for authentication.

Innovation Solution

A biometric information processing device that extracts surface and blood vessel patterns from images, uses feature points to set local regions, and compares features within these regions for authentication, reducing the need to scan the entire pattern for partial authentication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the entire vein pattern is photographed and compared for authentication, then authentication accuracy is improved, but processing time increases and productivity decreases

Engineering Contradiction:

Improveauthentication accuracyVSAvoidprocessing speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent divides the vein pattern into multiple local regions based on surface pattern feature points. Instead of processing the entire vein pattern, the system segments it into manageable portions that can be independently extracted and compared, thereby reducing processing time while maintaining authentication accuracy through selective regional analysis

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts only the necessary local regions containing vein patterns corresponding to surface feature points, rather than processing the complete vein pattern. This extraction approach removes unnecessary data processing steps while preserving the essential authentication information contained in the extracted regions

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the photographing range is expanded to capture the whole body region, then complete vein pattern enrollment is achieved, but device portability and ease of operation are reduced

Engineering Contradiction:

Improvevein pattern enrollment completenessVSAvoiddevice portability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system segments the body region into multiple local areas that can be captured in smaller, more manageable photographing ranges. Each local region containing vein patterns is identified and processed independently, allowing portable devices to perform authentication without requiring capture of the entire body region

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different processing approaches to different regions: surface patterns are used to identify feature points that guide the extraction of corresponding local vein regions. This local quality approach allows the system to focus processing resources on specific regions of interest rather than uniformly processing the entire captured area

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10430678B2Biometric information processing device, biometric information processing method and non-transitory computer-readable recording medium

Publication Date: 2019.10.01 FUJITSU LTD

AI summary

A biometric information processing device including: a memory; a processor coupled to the memory and the processor configured to: extract a surface pattern and a blood vessel pattern of a living body from a biometric image; extract a feature point of the surface pattern; and extract a feature of the blood vessel pattern corresponding to a position of the feature point.