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Test-time adaptation (TTA) has emerged as a viable solution to adapt pre-trained models to domain shifts using unlabeled test data. However, TTA faces challenges of adaptation failures due to its reliance on blind adaptation to unknown test…

Machine Learning · Computer Science 2024-04-03 Taeckyung Lee , Sorn Chottananurak , Taesik Gong , Sung-Ju Lee

Continual Test-Time Adaptation (CTTA) aims to adapt models to sequentially changing domains during testing, relying on pseudo-labels for self-adaptation. However, incorrect pseudo-labels can accumulate, leading to performance degradation.…

Machine Learning · Computer Science 2025-02-06 Fan Lyu , Hanyu Zhao , Ziqi Shi , Ye Liu , Fuyuan Hu , Zhang Zhang , Liang Wang

Continual Test-Time Adaptation (CTTA) enables pre-trained models to adapt to continuously evolving domains. Existing methods have improved robustness but typically rely on fixed or batch-level thresholds, which cannot account for varying…

Computer Vision and Pattern Recognition · Computer Science 2025-12-10 Seunghwan Lee , Inyoung Jung , Hojoon Lee , Eunil Park , Sungeun Hong

This paper introduces ReservoirTTA, a novel plug-in framework designed for prolonged test-time adaptation (TTA) in scenarios where the test domain continuously shifts over time, including cases where domains recur or evolve gradually. At…

Computer Vision and Pattern Recognition · Computer Science 2025-09-19 Guillaume Vray , Devavrat Tomar , Xufeng Gao , Jean-Philippe Thiran , Evan Shelhamer , Behzad Bozorgtabar

Continual Test-Time Adaptation (CTTA) involves adapting a pre-trained source model to continually changing unsupervised target domains. In this paper, we systematically analyze the challenges of this task: online environment, unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2024-07-19 Zhilin Zhu , Xiaopeng Hong , Zhiheng Ma , Weijun Zhuang , Yaohui Ma , Yong Dai , Yaowei Wang

Test-Time Adaptation (TTA) aims to enhance the generalization of deep learning models when faced with test data that exhibits distribution shifts from the training data. In this context, only a pre-trained model and unlabeled test data are…

Machine Learning · Computer Science 2025-05-19 Linjing You , Jiabao Lu , Xiayuan Huang , Xiangli Nie

Although open-vocabulary classification models like Contrastive Language Image Pretraining (CLIP) have demonstrated strong zero-shot learning capabilities, their robustness to common image corruptions remains poorly understood. Through…

Computer Vision and Pattern Recognition · Computer Science 2025-08-04 Sarthak Kumar Maharana , Baoming Zhang , Leonid Karlinsky , Rogerio Feris , Yunhui Guo

Test-time domain adaptation aims to adapt a source pre-trained model to a target domain without using any source data. Existing works mainly consider the case where the target domain is static. However, real-world machine perception systems…

Computer Vision and Pattern Recognition · Computer Science 2022-03-28 Qin Wang , Olga Fink , Luc Van Gool , Dengxin Dai

Fully-test-time adaptation (F-TTA) can mitigate performance loss due to distribution shifts between train and test data (1) without access to the training data, and (2) without knowledge of the model training procedure. In online F-TTA, a…

Machine Learning · Computer Science 2023-09-11 Skyler Seto , Barry-John Theobald , Federico Danieli , Navdeep Jaitly , Dan Busbridge

Test-time adaptation (TTA) is a technique aimed at enhancing the generalization performance of models by leveraging unlabeled samples solely during prediction. Given the need for robustness in neural network systems when faced with…

Machine Learning · Computer Science 2023-07-07 Yongcan Yu , Lijun Sheng , Ran He , Jian Liang

Continual Test Time Adaptation (CTTA) has emerged as a critical approach for bridging the domain gap between the controlled training environments and the real-world scenarios, enhancing model adaptability and robustness. Existing CTTA…

Computer Vision and Pattern Recognition · Computer Science 2025-08-11 Hyewon Park , Hyejin Park , Jueun Ko , Dongbo Min

Test-time adaptation (TTA) aims to boost the generalization capability of a trained model by conducting self-/unsupervised learning during the testing phase. While most existing TTA methods for video primarily utilize visual supervisory…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Runhao Zeng , Qi Deng , Ronghao Zhang , Shuaicheng Niu , Jian Chen , Xiping Hu , Victor C. M. Leung

Continual Test-Time Adaptation (CTA) is a challenging task that aims to adapt a source pre-trained model to continually changing target domains. In the CTA setting, a model does not know when the target domain changes, thus facing a drastic…

Machine Learning · Computer Science 2024-03-05 Inseop Chung , Kyomin Hwang , Jayeon Yoo , Nojun Kwak

Unsupervised tabular anomaly detection methods typically learn feature patterns from normal samples during training and subsequently identify samples that deviate from these patterns as anomalies during testing. However, in practical…

Machine Learning · Computer Science 2026-05-12 Wei Huang , Hezhe Qiao , Kailai Zhang , Zaisheng Ye , Yu-Ming Shang , Xiangling Fu

Test-Time Adaptation aims to adapt source domain model to testing data at inference stage with success demonstrated in adapting to unseen corruptions. However, these attempts may fail under more challenging real-world scenarios. Existing…

Machine Learning · Computer Science 2025-03-27 Yongyi Su , Xun Xu , Kui Jia

The performance of deep learning models depends heavily on test samples at runtime, and shifts from the training data distribution can significantly reduce accuracy. Test-time adaptation (TTA) addresses this by adapting models during…

Machine Learning · Computer Science 2026-02-03 Michal Danilowski , Soumyajit Chatterjee , Abhirup Ghosh

Test-Time Adaptation (TTA) aims to mitigate distributional shifts between training and test domains during inference time. However, existing TTA methods fall short in the realistic scenario where models face both continually changing…

Computer Vision and Pattern Recognition · Computer Science 2026-04-24 Yingkai Yang , Chaoqi Chen , Hui Huang

In real-world scenarios, tabular data often suffer from distribution shifts that threaten the performance of machine learning models. Despite its prevalence and importance, handling distribution shifts in the tabular domain remains…

Machine Learning · Computer Science 2025-02-13 Changhun Kim , Taewon Kim , Seungyeon Woo , June Yong Yang , Eunho Yang

Among the most insidious attacks on Reinforcement Learning (RL) solutions are training-time attacks (TTAs) that create loopholes and backdoors in the learned behaviour. Not limited to a simple disruption, constructive TTAs (C-TTAs) are now…

Machine Learning · Computer Science 2024-01-08 Ridhima Bector , Abhay Aradhya , Chai Quek , Zinovi Rabinovich

Visual-language models (VLMs) like CLIP exhibit strong generalization but struggle with distribution shifts at test time. Existing training-free test-time adaptation (TTA) methods operate strictly within CLIP's original feature space,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Jizhou Han , Chenhao Ding , SongLin Dong , Yuhang He , Xinyuan Gao , Yihong Gong