Venus-DefakerOne2: A Vision-Forensics Foundation Model with Broader Coverage

Chenfan Qu; Yachao Liang; Mingqi Fang; Jiangwei Xie; Zhenming Wang; Baoyue Zhang; Changjiang Jiang; Zheng Chang; Fanli Jin; Xuekang Zhu; Kaiwen Feng; Junchi Li; Weihong Zhang; Haoyue Wang; Chenfeng Zhang; Yinan Xia; Fangming Cui; Dong Fan; Jingjing Liu; Tianyi Zhang; Luobin Chen; Ji-Zhe Zhou; Sheng Li; Wei Wang; Bin Li; Ran He; Xinpeng Zhang; Linna Zhou; Jian Liu; Weiqiang Wang

arXiv · 2610.37918

Venus-DefakerOne2: A Vision-Forensics Foundation Model with Broader Coverage

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Abstract

Real-world forgery is inherently heterogeneous: it manifests not only as digital manipulation but also as physical spoofing, and is carried not only by images but also by videos. Despite substantial progress, a unified anti-forgery foundation model covering such a broad threat spectrum remains absent. In this paper, we present Venus-DefakerOne2, which substantially extends the forensic capability boundary along both the forgery-form and media-type dimensions. Trained on tens of millions of open-source and in-house samples, it incorporates two key designs. Tide-Style-Tuning alternates LoRA and full-parameter fine-tuning to balance computational efficiency, generalization, and hard-sample fitting while mitigating catastrophic forgetting. Entropy-based Test Adaptation determines the optimal prediction modality by analyzing prediction entropy. Venus-DefakerOne2 achieves new state-of-the-art performance across a comprehensive suite of benchmarks, including DeepFake faces (96.7%), AI-generated images (93.3%), tampered documents (87.6%), manipulated natural images (89.6%), physical spoofs (93.1%), and AI-generated videos (96.0%). It significantly outperforms both specialized expert models and its predecessor, DefakerOne, establishing itself as a powerful and versatile foundation model for binary-decision forensic tasks.

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Chenfan Qu, Yachao Liang, Mingqi Fang, Jiangwei Xie, Zhenming Wang, Baoyue Zhang, Changjiang Jiang, Zheng Chang, Fanli Jin, Xuekang Zhu, Kaiwen Feng, Junchi Li, Weihong Zhang, Haoyue Wang, Chenfeng Zhang, Yinan Xia, Fangming Cui, Dong Fan, Jingjing Liu, Tianyi Zhang, Luobin Chen, Ji-Zhe Zhou, Sheng Li, Wei Wang, Bin Li, Ran He, Xinpeng Zhang, Linna Zhou, Jian Liu, Weiqiang Wang. 2026-10-27. Venus-DefakerOne2: A Vision-Forensics Foundation Model with Broader Coverage. https://arxiv.org/abs/2610.37918

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