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arXiv 2409.03501cs.CV
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迈向以数据为中心的人脸活体检测:通过基于物理的数据合成提升跨域泛化能力

Towards Data-Centric Face Anti-Spoofing: Improving Cross-domain Generalization via Physics-based Data Synthesis

Nanyang Technological University(南洋理工大学);Great Bay University(大湾区大学);City University of Hong Kong(香港城市大学);Pengcheng Laboratory(鹏城实验室)

Rizhao Cai, Cecelia Soh, Zitong Yu, Haoliang Li, Wenhan Yang, Alex Kot

AI总结:

本文从数据视角出发,提出基于物理合成伪影的数据增强方法FAS-Aug和欺骗攻击风险均衡化SARE,以提升人脸活体检测模型的跨域泛化能力,并结合Vision Transformer取得最先进性能。

摘要:

人脸活体检测(FAS)研究面临跨域问题的挑战,即训练数据与测试数据之间存在域差距。近期的人脸活体检测工作主要以模型为中心,专注于开发域泛化算法以提升跨域性能,而以数据为中心的人脸活体检测研究——即从数据质量和数量角度提升泛化能力——在很大程度上被忽视。因此,我们的工作从以数据为中心的人脸活体检测入手,从数据视角进行全面研究,以提升人脸活体检测模型的跨域泛化能力。具体而言,首先,基于拍摄与翻拍的物理过程,我们提出了任务特定的人脸活体检测数据增强方法(FAS-Aug),通过合成伪影数据(如打印噪声、颜色失真、摩尔纹等)来增加数据多样性。我们的实验表明,使用所提出的FAS增强方法训练人脸活体检测模型,可以超越传统图像增强方法,取得更好的跨域性能。然而,我们观察到模型可能依赖于增强生成的伪影,而这些伪影并非环境不变的,因此使用FAS-Aug可能产生负面影响。为此,我们提出了欺骗攻击风险均衡化(SARE)方法,以防止模型依赖特定类型的伪影,并提升泛化性能。最后,我们提出的FAS-Aug和SARE结合最新的Vision Transformer骨干网络,在人脸活体检测跨域泛化协议上取得了最先进的性能。实现代码可在 https://github.com/RizhaoCai/FAS_Aug 获取。

英文摘要:

Face Anti-Spoofing (FAS) research is challenged by the cross-domain problem, where there is a domain gap between the training and testing data. While recent FAS works are mainly model-centric, focusing on developing domain generalization algorithms for improving cross-domain performance, data-centric research for face anti-spoofing, improving generalization from data quality and quantity, is largely ignored. Therefore, our work starts with data-centric FAS by conducting a comprehensive investigation from the data perspective for improving cross-domain generalization of FAS models. More specifically, at first, based on physical procedures of capturing and recapturing, we propose task-specific FAS data augmentation (FAS-Aug), which increases data diversity by synthesizing data of artifacts, such as printing noise, color distortion, moiré pattern, \textit{etc}. Our experiments show that using our FAS augmentation can surpass traditional image augmentation in training FAS models to achieve better cross-domain performance. Nevertheless, we observe that models may rely on the augmented artifacts, which are not environment-invariant, and using FAS-Aug may have a negative effect. As such, we propose Spoofing Attack Risk Equalization (SARE) to prevent models from relying on certain types of artifacts and improve the generalization performance. Last but not least, our proposed FAS-Aug and SARE with recent Vision Transformer backbones can achieve state-of-the-art performance on the FAS cross-domain generalization protocols. The implementation is available at https://github.com/RizhaoCai/FAS_Aug.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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