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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

This paper studies continual test-time adaptation (CTTA), the task of adapting a model to constantly changing unseen domains in testing while preserving previously learned knowledge. Existing CTTA methods mostly focus on adaptation to the…

Computer Vision and Pattern Recognition · Computer Science 2025-06-04 Sohyun Lee , Nayeong Kim , Juwon Kang , Seong Joon Oh , Suha Kwak

Real-world application models are commonly deployed in dynamic environments, where the target domain distribution undergoes temporal changes. Continual Test-Time Adaptation (CTTA) has recently emerged as a promising technique to gradually…

Computer Vision and Pattern Recognition · Computer Science 2025-06-12 Shilei Cao , Juepeng Zheng , Yan Liu , Baoquan Zhao , Ziqi Yuan , Weijia Li , Runmin Dong , Haohuan Fu

Active Test-Time Adaptation (ATTA) improves model robustness under domain shift by selectively querying human annotations at deployment, but existing methods use heuristic uncertainty measures and suffer from low data selection efficiency,…

Machine Learning · Computer Science 2025-10-01 Tingyu Shi , Fan Lyu , Shaoliang Peng

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

We introduce Ev-TTA, a simple, effective test-time adaptation algorithm for event-based object recognition. While event cameras are proposed to provide measurements of scenes with fast motions or drastic illumination changes, many existing…

Computer Vision and Pattern Recognition · Computer Science 2022-03-29 Junho Kim , Inwoo Hwang , Young Min Kim

Real-world vision models in dynamic environments face rapid shifts in domain distributions, leading to decreased recognition performance. Using unlabeled test data, continuous test-time adaptation (CTTA) directly adjusts a pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2025-01-28 Sarthak Kumar Maharana , Baoming Zhang , Yunhui Guo

Models should be able to adapt to unseen data during test-time to avoid performance drops caused by inevitable distribution shifts in real-world deployment scenarios. In this work, we tackle the practical yet challenging test-time…

Computer Vision and Pattern Recognition · Computer Science 2022-12-02 Yunhe Gao , Xingjian Shi , Yi Zhu , Hao Wang , Zhiqiang Tang , Xiong Zhou , Mu Li , Dimitris N. Metaxas

Given a model trained on source data, Test-Time Adaptation (TTA) enables adaptation and inference in test data streams with domain shifts from the source. Current methods predominantly optimize the model for each incoming test data batch…

Machine Learning · Computer Science 2024-07-18 Ziqiang Wang , Zhixiang Chi , Yanan Wu , Li Gu , Zhi Liu , Konstantinos Plataniotis , Yang Wang

Continual Test-Time Adaptation (CTTA) is crucial for deploying models in real-world applications with unseen, evolving target domains. Existing CTTA methods, however, often rely on source data or prototypes, limiting their applicability in…

Test-time adaptation (TTA) allows a model to be adapted to an unseen domain without accessing the source data. Due to the nature of practical environments, TTA has a limited amount of data for adaptation. Recent TTA methods further restrict…

Computer Vision and Pattern Recognition · Computer Science 2024-10-21 Younggeol Cho , Youngrae Kim , Junho Yoon , Seunghoon Hong , Dongman Lee

Test-time adaptation (TTA) is a technique used to reduce distribution gaps between the training and testing sets by leveraging unlabeled test data during inference. In this work, we expand TTA to a more practical scenario, where the test…

Machine Learning · Computer Science 2023-03-06 Chenyan Wu , Yimu Pan , Yandong Li , James Z. Wang

On-device adapting to continual, unpredictable domain shifts is essential for mobile applications like autonomous driving and augmented reality to deliver seamless user experiences in evolving environments. Test-time adaptation (TTA)…

Machine Learning · Computer Science 2024-10-14 Cheng Fang , Sicong Liu , Zimu Zhou , Bin Guo , Jiaqi Tang , Ke Ma , Zhiwen Yu

Continual Test Time Adaptation (CTTA) is required to adapt efficiently to continuous unseen domains while retaining previously learned knowledge. However, despite the progress of CTTA, it is still challenging to deploy the model with…

Machine Learning · Computer Science 2024-06-04 Daeun Lee , Jaehong Yoon , Sung Ju Hwang

While there are many advantages to deploying machine learning models on edge devices, the resource constraints of mobile platforms, the dynamic nature of the environment, and differences between the distribution of training versus…

Machine Learning · Computer Science 2025-03-21 Cynthia Dong , Hong Jia , Young D. Kwon , Georgios Rizos , Cecilia Mascolo

Deep neural networks often encounter significant performance drops while facing with domain shifts between training (source) and test (target) data. To address this issue, Test Time Adaptation (TTA) methods have been proposed to adapt…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Siqi Luo , Yi Xin , Yuntao Du , Tao Tan , Guangtao Zhai , Xiaohong Liu

Continual Test-Time Adaptation (CTTA) seeks to adapt source pre-trained models to continually changing, unseen target domains. While existing CTTA methods assume structured domain changes with uniform durations, real-world environments…

Machine Learning · Computer Science 2025-06-09 Yunbei Zhang , Akshay Mehra , Shuaicheng Niu , Jihun Hamm

Domain shift is a common problem in the realistic world, where training data and test data follow different data distributions. To deal with this problem, fully test-time adaptation (TTA) leverages the unlabeled data encountered during test…

Artificial Intelligence · Computer Science 2024-04-29 Guoliang Lin , Hanjiang Lai , Yan Pan , Jian Yin

Continual Test-Time Adaptation (CTTA) aims to empower perception systems to handle dynamic distribution shifts encountered after deployment. Existing methods predominantly follow a backward-alignment paradigm, which rigidly aligns incoming…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Zhilin Zhu , Yabin Wang , Zhiheng Ma , Yaguang Song , Yaowei Wang , Xiaopeng Hong

Test-time adaptation (TTA) is an emerging paradigm that addresses distributional shifts between training and testing phases without additional data acquisition or labeling cost; only unlabeled test data streams are used for continual model…

Machine Learning · Computer Science 2023-01-12 Taesik Gong , Jongheon Jeong , Taewon Kim , Yewon Kim , Jinwoo Shin , Sung-Ju Lee