Interpretable Face Anti-Spoofing: Enhancing Generalization with Multimodal Large Language Models

• URL: http://arxiv.org/abs/2501.01720v2
• Date: Fri, 24 Jan 2025 03:46:28 GMT
• Title: Interpretable Face Anti-Spoofing: Enhancing Generalization with Multimodal Large Language Models
• Authors: Guosheng Zhang, Keyao Wang, Haixiao Yue, Ajian Liu, Gang Zhang, Kun Yao, Errui Ding, Jingdong Wang,
• Abstract summary: Face Anti-Spoofing (FAS) is essential for ensuring the security and reliability of facial recognition systems. We introduce a multimodal large language model framework for FAS, termed Interpretable Face Anti-Spoofing (I-FAS) We propose a Spoof-aware Captioning and Filtering (SCF) strategy to generate high-quality captions for FAS images.
• Score: 58.936893810674896
• License:
• Abstract: Face Anti-Spoofing (FAS) is essential for ensuring the security and reliability of facial recognition systems. Most existing FAS methods are formulated as binary classification tasks, providing confidence scores without interpretation. They exhibit limited generalization in out-of-domain scenarios, such as new environments or unseen spoofing types. In this work, we introduce a multimodal large language model (MLLM) framework for FAS, termed Interpretable Face Anti-Spoofing (I-FAS), which transforms the FAS task into an interpretable visual question answering (VQA) paradigm. Specifically, we propose a Spoof-aware Captioning and Filtering (SCF) strategy to generate high-quality captions for FAS images, enriching the model's supervision with natural language interpretations. To mitigate the impact of noisy captions during training, we develop a Lopsided Language Model (L-LM) loss function that separates loss calculations for judgment and interpretation, prioritizing the optimization of the former. Furthermore, to enhance the model's perception of global visual features, we design a Globally Aware Connector (GAC) to align multi-level visual representations with the language model. Extensive experiments on standard and newly devised One to Eleven cross-domain benchmarks, comprising 12 public datasets, demonstrate that our method significantly outperforms state-of-the-art methods.

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