Liveness Detection via Multi-Region Screen Reflection Patterns

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing liveness detection technologies, such as those described in Patent Literature 1, are limited in their ability to accurately differentiate between living beings and non-living objects due to the simplicity of illumination patterns, leading to potential impersonation risks.

Innovation Solution

A liveness detection apparatus and method that employs a display control unit to display multiple screens with varying regions of different displays, capturing images with a camera, and analyzing these images to determine whether the target is a living being by exploiting differences in reflected light patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If simple illumination patterns are used in liveness detection, then the device complexity is reduced, but the measurement precision of liveness detection deteriorates

Engineering Contradiction:

Improveillumination pattern complexityVSAvoidliveness detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The display screen is divided into multiple regions (first region, second region, third region) that display different patterns independently. Each region can show distinct visual patterns (e.g., different colors, shapes, or moving elements) to create varied illumination patterns on the user's face, thereby improving liveness detection accuracy without requiring a completely complex illumination system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display screen are assigned different display characteristics. The first region may display a different pattern than the second and third regions, creating localized variations in illumination quality across the user's face. This local differentiation provides richer detection features while maintaining relatively simple overall system architecture.

Inventive Principle:

Principle #3Local quality

2Measurement precision

If multiple screens with different displays are shown, then the liveness detection accuracy is improved, but the duration of action increases

Engineering Contradiction:

Improveliveness detection accuracyVSAvoiddetection process duration

Core Design Contradiction:

Measurement precisionVSDuration of action of moving object

Solution Approach 1:

The system displays different patterns in the multiple regions periodically or in sequence. The display control unit can switch between different pattern combinations in the first, second, and third regions at different time points, creating a periodic variation in illumination patterns. This allows the system to gather sufficient detection information efficiently without requiring all patterns to be displayed simultaneously for extended periods.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system prepares multiple display patterns in advance and presents them in a structured sequence. By pre-defining the patterns for different regions and controlling their display timing, the system can efficiently guide the user through a detection workflow that collects necessary information without unnecessary delays, thus reducing the overall detection duration while maintaining accuracy.

Inventive Principle:

Principle #10Preliminary action

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 the accuracy of distinguishing between living and non-living objects by utilizing diverse light patterns, thereby reducing impersonation risks through improved liveness detection.

Implementation Method 1

a display control unit configured to cause a display apparatus to display a first screen including a display in each of a plurality of regions

Methodology Applied

Scientific EffectLight emission from display: Light Emitting Diode

Implementation Method 2

acquiring a plurality of captured images that are generated by capturing a target while each of the first screen and the second screen is displayed

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS20250363829A1Liveness detection apparatus, control method, and computer-readable medium

Publication Date: 2025.11.27 NEC CORP

AI summary

A liveness detection apparatus (2000) causes a display apparatus (20) to display a plurality of screens (30). At least one of the plurality of screens (30) has a plurality of regions (32). At least two of the plurality of regions (32) include different indications. The liveness detection apparatus (2000) acquires a plurality of captured images (40). The captured image (40) is generated by capturing an image of a target object (50) with a camera (10) while the screen (30) is displayed. The liveness detection apparatus (2000) determines whether or not the target object (50) is a living body by using the plurality of captured images (40).