Face Image Difference Guidance for Authentication Errors

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Solution Overview

Problem

Face authentication systems often fail to provide clear guidance to users when authentication errors occur, leading to confusion and prolonged authentication times due to unclear causes of failure.

Innovation Solution

A guidance acquisition device and method that includes a data acquisition unit, photographing unit, difference detection unit, guidance acquisition unit, and output control unit to detect and output personalized guidance for users based on detected differences between face images, using a correlation information storage to associate image differences with corrective actions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If face authentication is performed without providing guidance to users, then the authentication process is simpler, but user understanding of authentication errors deteriorates and authentication time increases

Engineering Contradiction:

Improveinformation about authentication error causesVSAvoidcomplexity of authentication system

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The system captures the user's face image, compares it with the registered face image, detects differences (such as lighting conditions, angle, expression), and provides feedback guidance to the user on how to improve the face image quality. This closed-loop feedback mechanism informs users of authentication error causes without significantly increasing system complexity.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system introduces an intermediary component that analyzes the difference between captured and registered face images and translates technical authentication failures into user-friendly guidance messages. This intermediary layer bridges the gap between complex authentication processes and simple user understanding.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If detailed analysis of face image differences is performed, then authentication accuracy is improved, but processing time increases

Engineering Contradiction:

Improveprecision of face image difference detectionVSAvoidauthentication processing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system extracts only the essential difference information between the captured face image and the registered face image (such as lighting conditions, angle, expression) rather than analyzing all image parameters. This selective extraction maintains authentication precision while reducing processing time.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system performs partial analysis by focusing on key difference factors that most commonly cause authentication failures, rather than conducting a complete exhaustive analysis of all image parameters. This partial action approach achieves sufficient precision for practical authentication while minimizing processing time.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12412423B2Guidance acquisition device for ascertaining cause of authentication error and providing guidance, guidance acquisition method, and storage medium

Publication Date: 2025.09.09 NEC CORP

AI summary

Face image data is acquired and a face image is captured, and a difference between a face image indicated by the face image data and the face image that is captured or a candidate of the difference is detected on the basis of at least one of the face image indicated by the face image data that is acquired, and the face image that is captured. Guidance is acquired on the basis of the difference or the candidate of the difference which is detected, and an output unit is controlled to output the guidance.