Biometric Scanner Presentation Attack Detection via Targeted OCT Scanning
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Solution Overview
Problem
Existing biometric security systems face challenges in efficiently detecting presentation attacks across the entire field of view, as current technologies like optical coherence tomography (OCT) are slow and costly, making it impractical to implement them across a large field-of-view for biometric scanners.
Innovation Solution
The system directs a presentation attack detection (PAD) system to specific locations within the biometric scanner's field of view where biometric features are detected, using OCT or other modalities like spectral sensing to determine the presence of fake or real biometric presentations, thereby reducing the need to scan the entire field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If presentation attack detection is performed across the entire field of view of the biometric scanner, then detection coverage is improved, but detection time and system resources are excessively consumed
Solution Approach 1:
The patent divides the field of view into multiple regions and performs presentation attack detection only on selected regions rather than the entire field of view. The system identifies regions containing biometric features and directs the PAD system to scan only those specific locations, thereby segmenting the detection process to reduce time and resource consumption while maintaining detection coverage.
Solution Approach 2:
The patent applies different detection strategies to different regions of the field of view. High-resolution PAD is applied locally to regions where biometric features are detected, while other regions receive minimal or no scanning. This local quality approach ensures that detection resources are concentrated where they are most needed, improving efficiency without sacrificing reliability.
2Measurement precision
If optical coherence tomography (OCT) is used for presentation attack detection, then detection accuracy is improved, but system cost and processing speed deteriorate
Solution Approach 1:
The patent applies OCT-based PAD only partially to specific regions of interest rather than performing exhaustive scanning of the entire field of view. By directing the OCT scanner to focus only on locations where biometric features are present, the system achieves high detection accuracy where needed while significantly reducing overall processing time and resource consumption.
3Reliability
If the PAD system scans the entire field of view, then detection thoroughness is improved, but system complexity and resource requirements increase
Solution Approach 1:
The patent performs preliminary scanning to identify regions containing biometric features before directing the PAD system to conduct detailed analysis. This preliminary action allows the system to pre-select regions of interest, thereby simplifying the subsequent PAD process and reducing the computational complexity and resource requirements of the overall system.
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
This approach significantly reduces the time and resources required for presentation attack detection by focusing on specific locations, enhancing the efficiency of biometric security systems without compromising detection accuracy.
Implementation Method 1
using OCT or other modalities like spectral sensing to determine the presence of fake or real biometric presentations
Implementation Method 2
Another finger PAD technology is the use of optical scatter off of an object that touches the platen of a fingerprint scanner
Data Source
AI summary
An apparatus for biometric security having a biometric scanner for capturing over a first field of view image data representative of one or more biometric objects associated with a subject, and a presentation attack detection system for capturing over a second field at one or more locations along the subject information indicative of presence of the one or more biometric objects. One or more processers utilizes the image data received from the biometric scanner to select such one or more locations, and to direct the second field of view of the presentation attack detection system to obtain the information along one or more of the selected one or more locations, and to determine in accordance with the information when the first field of view contains a true or fake presentation to the biometric scanner.