Liveness Detection Using Multi-Region Display Light Patterns
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 distinguish between living beings and non-living objects due to the simplicity of illumination patterns used, leading to potential impersonation risks.
Innovation Solution
A liveness detection apparatus and method that employs a display apparatus to show multiple screens with differently configured regions, capturing images under these varied displays to analyze reflected light patterns for accurate determination of a living target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single illumination source is used for liveness detection, then the device complexity is reduced, but the measurement precision and reliability of liveness detection deteriorate
Solution Approach 1:
The illumination system is segmented into multiple independent light sources (first illumination light and second illumination light) that emit different wavelengths. This segmentation allows the system to capture multiple images under different illumination conditions, enabling more accurate differentiation between living bodies and non-living objects by analyzing wavelength-specific reflected light characteristics.
Solution Approach 2:
Different regions of the illumination system provide different quality characteristics (different wavelengths). The first illumination light provides one wavelength range while the second illumination light provides another wavelength range, allowing localized optimization for detecting different physical properties of the target object.
2Measurement precision
If multiple screens with different illumination patterns are displayed sequentially, then the liveness detection accuracy is improved, but the detection time increases
Solution Approach 1:
The system employs periodic display of multiple screens with different illumination patterns (first screen with first illumination light, second screen with second illumination light). This periodic action allows the capture of multiple images under varying illumination conditions, enabling accurate liveness detection through comparison of reflected light characteristics across different wavelengths and patterns.
3Ease of operation
If the illumination environment is not controlled, then the ease of operation is improved, but the reliability of liveness detection deteriorates
Solution Approach 1:
The system preemptively counteracts the negative effects of uncontrolled ambient illumination by introducing controlled illumination sources that emit specific wavelengths. The first and second illumination lights create known illumination patterns that allow the system to distinguish between light reflected from the target object and ambient light interference, thereby maintaining detection reliability without requiring strict environmental control.
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, reducing the likelihood of 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 and a second screen including a display different from the display of the first screen
Implementation Method 2
an acquisition unit configured to acquire a plurality of captured images generated when a target is captured by a camera 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).