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Machine learning surrogates are increasingly used in engineering to accelerate costly simulations, yet distribution shifts between training and deployment often cause severe performance degradation (e.g., unseen geometries or…

Machine Learning · Computer Science 2026-02-18 Anna Zimmel , Paul Setinek , Gianluca Galletti , Johannes Brandstetter , Werner Zellinger

Test-Time Adaptation (TTA) offers a practical solution for deploying image segmentation models under domain shift without accessing source data or retraining. Among existing TTA strategies, pseudo-label-based methods have shown promising…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Jianghao Wu , Xiangde Luo , Yubo Zhou , Lianming Wu , Guotai Wang , Shaoting Zhang

Test time Adaptation is a promising approach for mitigating domain shift in medical image segmentation; however, current evaluations remain limited in terms of modality coverage, task diversity, and methodological consistency. We present…

Computer Vision and Pattern Recognition · Computer Science 2025-12-03 Wenjing Yu , Shuo Jiang , Yifei Chen , Shuo Chang , Yuanhan Wang , Beining Wu , Jie Dong , Mingxuan Liu , Shenghao Zhu , Feiwei Qin , Changmiao Wang , Qiyuan Tian

Test-time Adaptation (TTA) aims to improve model performance when the model encounters domain changes after deployment. The standard TTA mainly considers the case where the target domain is static, while the continual TTA needs to undergo a…

Computer Vision and Pattern Recognition · Computer Science 2025-01-03 Xinru Meng , Han Sun , Jiamei Liu , Ningzhong Liu , Huiyu Zhou

Test-Time Adaptation (TTA) enables pre-trained models to bridge the gap between source and target datasets using unlabeled test data, addressing domain shifts caused by corruptions like weather changes, noise, or sensor malfunctions in test…

Machine Learning · Computer Science 2025-07-29 Yufei Zhang , Yicheng Xu , Hongxin Wei , Zhiping Lin , Xiaofeng Zou , Cen Chen , Huiping Zhuang

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

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

Test-time adaptation (TTA) methods, which generally rely on the model's predictions (e.g., entropy minimization) to adapt the source pretrained model to the unlabeled target domain, suffer from noisy signals originating from 1) incorrect or…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Jungsoo Lee , Debasmit Das , Jaegul Choo , Sungha Choi

Multi-modal test-time adaptation (MM-TTA) adapts models to an unlabeled target domain by leveraging the complementary multi-modal inputs in an online manner. While previous MM-TTA methods for 3D segmentation offer a promising solution by…

Computer Vision and Pattern Recognition · Computer Science 2025-10-07 Haozhi Cao , Yuecong Xu , Pengyu Yin , Xingyu Ji , Shenghai Yuan , Jianfei Yang , Lihua Xie

Continual Test-time adaptation (CTTA) continuously adapts the deployed model on every incoming batch of data. While achieving optimal accuracy, existing CTTA approaches present poor real-world applicability on resource-constrained edge…

Machine Learning · Computer Science 2026-04-21 Xiao Ma , Young D. Kwon , Dong Ma

Vision-language models (VLMs) exhibit remarkable zero-shot generalization but suffer performance degradation under distribution shifts in downstream tasks, particularly in the absence of labeled data. Test-Time Adaptation (TTA) addresses…

Computer Vision and Pattern Recognition · Computer Science 2025-11-17 Khanh-Binh Nguyen , Phuoc-Nguyen Bui , Hyunseung Choo , Duc Thanh Nguyen

Test-time adaptation aims to adapt pre-trained deep neural networks using solely online unlabelled test data during inference. Although TTA has shown promise in visual applications, its potential in time series contexts remains largely…

Machine Learning · Computer Science 2025-01-06 Peiliang Gong , Mohamed Ragab , Min Wu , Zhenghua Chen , Yongyi Su , Xiaoli Li , Daoqiang Zhang

Source-free test-time adaptation (TTA) is appealing for mobile and wearable sensing because it enables on-device personalization from unlabeled test streams without centralizing private data. However, sensor-based human activity recognition…

Artificial Intelligence · Computer Science 2026-04-29 Changyu Li , Lu Wang , Ming Lei , Jiashen Liu , Yichen Zhang , Kaishun Wu , Fei Luo

Existing trajectory prediction methods exhibit significant performance degradation under distribution shifts during test time. Although test-time training techniques have been explored to enable adaptation, current approaches rely on an…

Computer Vision and Pattern Recognition · Computer Science 2026-03-11 Yuning Wang , Pu Zhang , Yuan He , Ke Wang , Jianru Xue

Multimodal sentiment analysis (MSA) is an emerging research topic that aims to understand and recognize human sentiment or emotions through multiple modalities. However, in real-world dynamic scenarios, the distribution of target data is…

Machine Learning · Computer Science 2025-02-11 Zirun Guo , Tao Jin , Wenlong Xu , Wang Lin , Yangyang Wu

Domain adaptation (DA) techniques help deep learning models generalize across data shifts for point cloud semantic segmentation (PCSS). Test-time adaptation (TTA) allows direct adaptation of a pre-trained model to unlabeled data during…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Puzuo Wang , Wei Yao , Jie Shao , Zhiyi He

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

Test-time adaptation (TTA) enables efficient adaptation of deployed models, yet it often leads to poorly calibrated predictive uncertainty - a critical issue in high-stakes domains such as autonomous driving, finance, and healthcare.…

Machine Learning · Computer Science 2025-12-09 Gilhyun Nam , Taewon Kim , Joonhyun Jeong , Eunho Yang

Test-time adaptive (TTA) semantic segmentation adapts a source pre-trained image semantic segmentation model to unlabeled batches of target domain test images, different from real-world, where samples arrive one-by-one in an online fashion.…

Computer Vision and Pattern Recognition · Computer Science 2023-03-01 Debasmit Das , Shubhankar Borse , Hyojin Park , Kambiz Azarian , Hong Cai , Risheek Garrepalli , Fatih Porikli

Since distribution shifts are likely to occur after a model's deployment and can drastically decrease the model's performance, online test-time adaptation (TTA) continues to update the model during test-time, leveraging the current test…

Computer Vision and Pattern Recognition · Computer Science 2024-01-03 Mario Döbler , Florian Marencke , Robert A. Marsden , Bin Yang