Search Results for author: Lijun Sheng

Found 8 papers, 6 papers with code

Learning Spatiotemporal Inconsistency via Thumbnail Layout for Face Deepfake Detection

1 code implementation15 Mar 2024 Yuting Xu, Jian Liang, Lijun Sheng, Xiao-Yu Zhang

The deepfake threats to society and cybersecurity have provoked significant public apprehension, driving intensified efforts within the realm of deepfake video detection.

DeepFake Detection Face Swapping

A Hard-to-Beat Baseline for Training-free CLIP-based Adaptation

1 code implementation6 Feb 2024 Zhengbo Wang, Jian Liang, Lijun Sheng, Ran He, Zilei Wang, Tieniu Tan

Extensive results on 17 datasets validate that our method surpasses or achieves comparable results with state-of-the-art methods on few-shot classification, imbalanced learning, and out-of-distribution generalization.

Out-of-Distribution Generalization

Self-training solutions for the ICCV 2023 GeoNet Challenge

1 code implementation28 Nov 2023 Lijun Sheng, Zhengbo Wang, Jian Liang

Our solution adopts a two-stage source-free domain adaptation framework with a Swin Transformer backbone to achieve knowledge transfer from the USA (source) domain to Asia (target) domain.

Source-Free Domain Adaptation Transfer Learning

Unleashing the power of Neural Collapse for Transferability Estimation

no code implementations9 Oct 2023 Yuhe Ding, Bo Jiang, Lijun Sheng, Aihua Zheng, Jian Liang

Transferability estimation aims to provide heuristics for quantifying how suitable a pre-trained model is for a specific downstream task, without fine-tuning them all.

Fairness Image Classification +3

Towards Realistic Unsupervised Fine-tuning with CLIP

no code implementations24 Aug 2023 Jian Liang, Lijun Sheng, Zhengbo Wang, Ran He, Tieniu Tan

The emergence of vision-language models (VLMs), such as CLIP, has spurred a significant research effort towards their application for downstream supervised learning tasks.

Out-of-Distribution Detection

Benchmarking Test-Time Adaptation against Distribution Shifts in Image Classification

1 code implementation6 Jul 2023 Yongcan Yu, Lijun Sheng, Ran He, Jian Liang

To implement this benchmark, we have developed a unified framework in PyTorch, which allows for consistent evaluation and comparison of the TTA methods across the different datasets and network architectures.

Benchmarking Image Classification +1

AdaptGuard: Defending Against Universal Attacks for Model Adaptation

1 code implementation ICCV 2023 Lijun Sheng, Jian Liang, Ran He, Zilei Wang, Tieniu Tan

To address this issue, we propose a model preprocessing framework, named AdaptGuard, to improve the security of model adaptation algorithms.

Knowledge Distillation Transfer Learning

ProxyMix: Proxy-based Mixup Training with Label Refinery for Source-Free Domain Adaptation

2 code implementations29 May 2022 Yuhe Ding, Lijun Sheng, Jian Liang, Aihua Zheng, Ran He

First of all, to avoid additional parameters and explore the information in the source model, ProxyMix defines the weights of the classifier as the class prototypes and then constructs a class-balanced proxy source domain by the nearest neighbors of the prototypes to bridge the unseen source domain and the target domain.

Object Recognition Source-Free Domain Adaptation +1

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