DADM: Dual Alignment of Domain and Modality for Face Anti-spoofing

• URL: http://arxiv.org/abs/2503.00429v2
• Date: Tue, 27 May 2025 16:28:52 GMT
• Title: DADM: Dual Alignment of Domain and Modality for Face Anti-spoofing
• Authors: Jingyi Yang, Xun Lin, Zitong Yu, Liepiao Zhang, Xin Liu, Hui Li, Xiaochen Yuan, Xiaochun Cao,
• Abstract summary: Multi-modal face anti-spoofing (FAS) has emerged as a prominent research focus.<n>We propose a alignment module between modalities based on mutual information.<n>We employ a dual alignment optimization method that aligns both sub-domain hyperplanes and modality angle margins.
• Score: 58.62312400472865
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: With the availability of diverse sensor modalities (i.e., RGB, Depth, Infrared) and the success of multi-modal learning, multi-modal face anti-spoofing (FAS) has emerged as a prominent research focus. The intuition behind it is that leveraging multiple modalities can uncover more intrinsic spoofing traces. However, this approach presents more risk of misalignment. We identify two main types of misalignment: (1) \textbf{Intra-domain modality misalignment}, where the importance of each modality varies across different attacks. For instance, certain modalities (e.g., Depth) may be non-defensive against specific attacks (e.g., 3D mask), indicating that each modality has unique strengths and weaknesses in countering particular attacks. Consequently, simple fusion strategies may fall short. (2) \textbf{Inter-domain modality misalignment}, where the introduction of additional modalities exacerbates domain shifts, potentially overshadowing the benefits of complementary fusion. To tackle (1), we propose a alignment module between modalities based on mutual information, which adaptively enhances favorable modalities while suppressing unfavorable ones. To address (2), we employ a dual alignment optimization method that aligns both sub-domain hyperplanes and modality angle margins, thereby mitigating domain gaps. Our method, dubbed \textbf{D}ual \textbf{A}lignment of \textbf{D}omain and \textbf{M}odality (DADM), achieves state-of-the-art performance in extensive experiments across four challenging protocols demonstrating its robustness in multi-modal domain generalization scenarios. The codes will be released soon.

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