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An Attention-Guided Framework for Explainable Biometric Presentation Attack Detection

Pan, Shi, Hoque, Sanaul, Deravi, Farzin (2022) An Attention-Guided Framework for Explainable Biometric Presentation Attack Detection. Sensors, 22 (9). Article Number 3365. ISSN 1424-8220. (doi:10.3390/s22093365) (KAR id:94750)

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Official URL:
https://doi.org/10.3390/s22093365

Abstract

Despite the high performances achieved using deep learning techniques in biometric systems, the inability to rationalise the decisions reached by such approaches is a significant drawback for the usability and security requirements of many applications. For Facial Biometric Presentation Attack Detection (PAD), deep learning approaches can provide good classification results but cannot answer the questions such as “Why did the system make this decision”? To overcome this limitation, an explainable deep neural architecture for Facial Biometric Presentation Attack Detection is introduced in this paper. Both visual and verbal explanations are produced using the saliency maps from a Grad-CAM approach and the gradient from a Long-Short-Term-Memory (LSTM) network with a modified gate function. These explanations have also been used in the proposed framework as additional information to further improve the classification performance. The proposed framework utilises both spatial and temporal information to help the model focus on anomalous visual characteristics that indicate spoofing attacks. The performance of the proposed approach is evaluated using the CASIA-FA, Replay Attack, MSU-MFSD, and HKBU MARs datasets and indicates the effectiveness of the proposed method for improving performance and producing usable explanations.

Item Type: Article
DOI/Identification number: 10.3390/s22093365
Uncontrolled keywords: Biometrics; Presentation Attack Detection; Deep Learning; Explainable Artificial Intelligence
Subjects: Q Science > Q Science (General) > Q335 Artificial intelligence
Q Science > QA Mathematics (inc Computing science) > QA 76 Software, computer programming, > QA76.87 Neural computers, neural networks
T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK7800 Electronics > TK7880 Applications of electronics > TK7882.B56 Biometric identification
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Sanaul Hoque
Date Deposited: 29 Apr 2022 09:08 UTC
Last Modified: 03 May 2022 12:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/94750 (The current URI for this page, for reference purposes)
Hoque, Sanaul: https://orcid.org/0000-0001-8627-3429
Deravi, Farzin: https://orcid.org/0000-0003-0885-437X
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