Only Train Once: Uncertainty-Aware One-Class Learning for Face Authenticity Detection

TL;DR

This paper introduces FADNet, a self-supervised, one-class classification framework for universal face forgery detection that leverages authentic data and uncertainty quantification to outperform existing methods.

Contribution

FADNet reformulates face forgery detection as a one-class classification problem using self-supervised learning and uncertainty estimation, enhancing generalization to unseen forgeries.

Findings

FADNet achieves 96.63% average accuracy on benchmarks.

FADNet outperforms state-of-the-art methods in forgery detection.

Incorporates Evidential Deep Learning for uncertainty quantification.

Abstract

The rapid evolution of generative paradigms has enabled the creation of highly realistic imagery, which escalating the risks of identity fraud and the dissemination of disinformation. Most existing approaches frame face forgery detection as a fully supervised binary classification problem. Consequently, these models typically exhibit significant performance decay when tasked with detecting forgeries from previously unseen generative paradigms. Furthermore, these methods focus exclusively on either DeepFakes or fully synthesized faces, thereby failing to provide a generalized framework for universal face forgery detection. In this paper, we address this challenge by introducing FADNet (Face Authenticity Detector Net), % a self-supervised framework that which reformulates face forgery detection as a one-class classification (OCC) task. By training exclusively on authentic facial data to capture their intrinsic representations, FADNet flags any image whose feature embedding deviates significantly from the learned distribution of real faces as a forgery. The framework incorporates Evidential Deep Learning (EDL) to quantify predictive uncertainty and utilizes a plug-and-play pseudo-forgery image generator (PFIG) to tighten decision boundaries around authentic data. Extensive experimental evaluations on the DF40 and ASFD benchmarks demonstrate that FADNet achieves superior performance and generalization capabilities. Specifically, FADNet substantially outperforms existing state-of-the-art (SOTA) methods, yielding a remarkable average accuracy of 96.63\% and an average precision of 98.83\%.