Fingerprint Feature Point Slide Path Access Control

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Solution Overview

Problem

Current access controlling methods, such as slide operations, are not suitable for electronic devices requiring higher security levels.

Innovation Solution

An electronic device uses a fingerprint scanning system to identify feature points, sets a slide path based on these points as a password for unlocking, and verifies matching slide paths to control access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a slide operation is used for access control, then the ease of operation is improved, but the security level deteriorates

Engineering Contradiction:

Improveease of operationVSAvoidsecurity level

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent segments the fingerprint image into multiple feature points (ridge endpoints and bifurcation points) and uses these discrete points to define the slide path. This segmentation transforms the continuous fingerprint pattern into discrete control points that guide the sliding operation, thereby enhancing security while maintaining ease of use.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter used for access control from a simple slide gesture to a slide path defined by multiple fingerprint feature points. By transforming the access control parameter from a coarse gesture to a fine-grained path based on ridge endpoints and bifurcation points, the system achieves higher security without sacrificing user convenience.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If fingerprint feature points are used to create slide paths, then the security level is improved, but the device complexity increases

Engineering Contradiction:

Improvesecurity levelVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent creates a simplified copy or representation of the fingerprint by extracting only the essential feature points (ridge endpoints and bifurcation points) rather than using the entire fingerprint image. This copied feature point set is then used to define the slide path, reducing the complexity of the authentication process while maintaining high security levels.

Inventive Principle:

Principle #26Copying

3Measurement precision

If multiple feature points are extracted and processed, then the measurement precision is improved, but the loss of time increases

Engineering Contradiction:

Improvemeasurement precisionVSAvoidloss of time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary extraction and identification of fingerprint feature points (ridge endpoints and bifurcation points) during the enrollment phase. These pre-identified feature points are stored and later used to quickly verify the slide path during authentication, reducing the time required for actual access control while maintaining high measurement precision.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9785762B2Electronic device and method for controlling access to same

Publication Date: 2017.10.10 CHIUN MAI COMM SYST INC

AI summary

A method of controlling access to an electronic device includes scanning a fingerprint of a user and obtaining a first image of the fingerprint. A preset number of feature points of the fingerprint from the first image are extracted. A distance value between each of the extracted feature points is adjusted to obtain a new image. A first slide path according to touch signals corresponding to the extracted feature points in the new image is identified. The first slide path is set as a password for unlocking the electronic device.