Liveness Detection With Multi-Region Display Illumination
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Solution Overview
Problem
Existing liveness detection technologies, such as those described in Patent Literature 1, rely on simple illumination changes that are not sufficient to accurately distinguish between living beings and non-living objects, leading to potential impersonation issues.
Innovation Solution
A liveness detection apparatus and method that utilizes a display apparatus to show multiple screens with differently configured regions, capturing images under these varying displays to analyze reflected light patterns for accurate determination of a living target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple illumination changes are used for liveness detection, then the device complexity is reduced, but the measurement precision and reliability of distinguishing living beings from non-living objects deteriorates
Solution Approach 1:
The display screen is divided into multiple regions (first region, second region, third region) with different display states. The first region displays a first pattern, the second region displays a second pattern, and the third region displays a third pattern. This segmentation creates spatially distributed illumination variations that cast distinct shadows on the target's face, enabling more precise liveness detection while maintaining relatively simple device structure.
Solution Approach 2:
Different regions of the display screen are assigned different display patterns and illumination characteristics. The first region has first illumination characteristics, the second region has second illumination characteristics, and the third region has third illumination characteristics. This local differentiation creates varied lighting conditions across the target's face, making it difficult for non-living objects to replicate the natural response patterns.
2Measurement precision
If multiple display patterns are shown to create diverse light patterns, then the liveness detection accuracy is improved, but the duration of action increases due to multiple capturing steps
Solution Approach 1:
The display control unit sequentially displays different patterns in the first region (first pattern, second pattern, third pattern) in a periodic manner. The camera captures images at corresponding time points when each pattern is displayed. This periodic action allows the system to acquire multiple illumination-conditioned images efficiently, improving detection accuracy while controlling the overall detection time through structured temporal arrangement.
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 employing diverse light patterns, thereby improving security against impersonation.
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
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
Data Source
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).