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Continual Test-Time Adaptation (CTTA) is an emerging and challenging task where a model trained in a source domain must adapt to continuously changing conditions during testing, without access to the original source data. CTTA is prone to…

Machine Learning · Computer Science 2024-05-29 Ziqi Shi , Fan Lyu , Ye Liu , Fanhua Shang , Fuyuan Hu , Wei Feng , Zhang Zhang , Liang Wang

Conventional test-time adaptation (TTA) approaches typically adapt the model using only a small fraction of test samples, often those with low-entropy predictions, thereby failing to fully leverage the available information in the test…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Nam Nguyen Phuong , Duc Nguyen The Minh , Phi Le Nguyen , Ehsan Abbasnejad , Minh Hoai

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

A deployed question answering (QA) model can easily fail when the test data has a distribution shift compared to the training data. Robustness tuning (RT) methods have been widely studied to enhance model robustness against distribution…

Computation and Language · Computer Science 2023-02-10 Hai Ye , Yuyang Ding , Juntao Li , Hwee Tou Ng

Deep neural networks demonstrate strong performance under aligned training-test distributions. However, real-world test data often exhibit domain shifts. Test-Time Adaptation (TTA) addresses this challenge by adapting the model to test data…

Artificial Intelligence · Computer Science 2025-08-27 Byung-Joon Lee , Jin-Seop Lee , Jee-Hyong Lee

Adapting models to dynamic, real-world environments characterized by shifting data distributions and unseen test scenarios is a critical challenge in deep learning. In this paper, we consider a realistic and challenging Test-Time Adaptation…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Manogna Sreenivas , Soma Biswas

When continual test-time adaptation (TTA) persists over the long term, errors accumulate in the model and further cause it to predict only a few classes for all inputs, a phenomenon known as model collapse. Recent studies have explored…

Machine Learning · Computer Science 2026-03-05 Taejun Lim , Joong-Won Hwang , Kibok Lee

Audio-visual continual test-time adaptation involves continually adapting a source audio-visual model at test-time, to unlabeled non-stationary domains, where either or both modalities can be distributionally shifted, which hampers online…

Machine Learning · Computer Science 2026-02-24 Sarthak Kumar Maharana , Akshay Mehra , Bhavya Ramakrishna , Yunhui Guo , Guan-Ming Su

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

Recently, Miller et al. (2021) and Baek et al. (2022) empirically demonstrated strong linear correlations between in-distribution (ID) versus out-of-distribution (OOD) accuracy and agreement. These trends, coined accuracy-on-the-line (ACL)…

Machine Learning · Computer Science 2024-11-11 Eungyeup Kim , Mingjie Sun , Christina Baek , Aditi Raghunathan , J. Zico Kolter

Test-time adaptation (TTA) adapts the pre-trained models during inference using unlabeled test data and has received a lot of research attention due to its potential practical value. Unfortunately, without any label supervision, existing…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Longhui Yuan , Shuang Li , Zhuo He , Binhui Xie

Test-time adaptation (TTA) addresses the unforeseen distribution shifts occurring during test time. In TTA, performance, memory consumption, and time consumption are crucial considerations. A recent diffusion-based TTA approach for…

Computer Vision and Pattern Recognition · Computer Science 2024-07-12 Yeongtak Oh , Jonghyun Lee , Jooyoung Choi , Dahuin Jung , Uiwon Hwang , Sungroh Yoon

It is a well-known fact that the performance of deep learning models deteriorates when they encounter a distribution shift at test time. Test-time adaptation (TTA) algorithms have been proposed to adapt the model online while inferring test…

Computer Vision and Pattern Recognition · Computer Science 2023-12-15 Jayeon Yoo , Dongkwan Lee , Inseop Chung , Donghyun Kim , Nojun Kwak

Text-based person search faces inherent limitations due to data scarcity, driven by stringent privacy constraints and the high cost of manual annotation. To mitigate this, existing methods usually rely on a Pretrain-then-Finetune paradigm,…

Information Retrieval · Computer Science 2026-04-28 Jiahao Zhang , Shaofei Huang , Yaxiong Wang , Zhedong Zheng

Test-time adaptation (TTA) aims to address the distribution shift between the training and test data with only unlabeled data at test time. Existing TTA methods often focus on improving recognition performance specifically for test data…

Machine Learning · Computer Science 2024-08-28 Yongcan Yu , Lijun Sheng , Ran He , Jian Liang

Test-time alignment (TTA) aims to adapt models to specific rewards during inference. However, existing methods tend to either under-optimise or over-optimise (reward hack) the target reward function. We propose Null-Text Test-Time Alignment…

Computer Vision and Pattern Recognition · Computer Science 2025-11-27 Taehoon Kim , Henry Gouk , Timothy Hospedales

Drowsy driving is a growing cause of traffic accidents, prompting recent exploration of electroencephalography (EEG)-based drowsiness detection systems. However, the inherent variability of EEG signals due to psychological and physical…

Machine Learning · Computer Science 2025-12-01 Geun-Deok Jang , Dong-Kyun Han , Seo-Hyeon Park , Seong-Whan Lee

Test-Time Adaptation (TTA) enhances model robustness to out-of-distribution (OOD) data by updating the model online during inference, yet existing methods lack theoretical insights into the fundamental causes of performance degradation…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Xiao Chen , Zhongjing Du , Jiazhen Huang , Xu Jiang , Li Lu , Jingyan Jiang , Zhi Wang

Domain adaptation is to transfer the shared knowledge learned from the source domain to a new environment, i.e., target domain. One common practice is to train the model on both labeled source-domain data and unlabeled target-domain data.…

Computer Vision and Pattern Recognition · Computer Science 2022-12-13 Zhedong Zheng , Yi Yang

Test-time adaptation (TTA) aims to improve model robustness under distribution shifts by adapting to unlabeled test data, but most existing methods rely on backpropagation (BP), which is computationally costly and incompatible with…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Ronghao Zhang , Shuaicheng Niu , Qi Deng , Yanjie Dong , Jian Chen , Runhao Zeng