Face Comparison Device Blocking Object Detection

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Solution Overview

Problem

Existing face comparison devices inconveniently suspend processing when a blocking object, such as eyeglasses or a mask, is detected, leading to unnecessary authentication failures and user annoyance.

Innovation Solution

A comparison device and method that determine the presence of blocking objects in face images and only urge the user to remove them when the object significantly affects the comparison score, avoiding immediate suspension and enhancing user experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If blocking object detection is applied to suspend comparison processing, then authentication accuracy is improved, but user convenience deteriorates

Engineering Contradiction:

Improveauthentication accuracyVSAvoiduser convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system changes the parameter of blocking object detection by not suspending comparison processing even when blocking objects are detected. Instead, it allows the comparison to proceed and uses the detection result to provide guidance information to the user, thereby maintaining user convenience while still improving authentication accuracy through selective re-imaging.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If blocking object detection is applied to cancel financial transactions, then authentication reliability is improved, but processing efficiency deteriorates

Engineering Contradiction:

Improveauthentication reliabilityVSAvoidprocessing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system changes the parameter of blocking object detection outcome by not canceling or suspending processing when blocking objects are detected. Instead, it allows the comparison to complete and uses the detection information to guide users for re-imaging only when necessary, thereby maintaining authentication reliability while avoiding unnecessary processing interruptions that would reduce efficiency.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If immediate suspension of comparison processing is implemented when blocking objects are detected, then measurement precision is improved, but loss of time increases

Engineering Contradiction:

Improveface comparison precisionVSAvoidauthentication time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system changes the parameter of blocking object detection response by not immediately suspending comparison processing. Instead, it allows the comparison to proceed and uses the detection result to provide guidance information, thereby avoiding unnecessary time loss from immediate suspension while still maintaining measurement precision through selective re-imaging when blocking objects are present.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3471055B1Comparison device and comparison method

Publication Date: 2022.10.05 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

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AI summary

There are provided a comparison device and a comparison method including a step (S3) of determining whether or not a comparison target person is a subject of a registered face image by comparing an imaged face image to the registered face image, a step (S7) of determining whether or not a blocking object is provided in the imaged face image, a step (S8) of determining whether or not removing the blocking object is required, by calculating a partial similarity score between the imaged face image and the registered face image in a partial area corresponding to the blocking object, and a step (S10) of urging the blocking object to be detached based on the partial similarity score.