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Test-Time Adaptation (TTA) enables pre-trained models to adjust to distribution shift by learning from unlabeled test-time streams. However, existing methods typically treat these streams as independent samples, overlooking the supervisory…

Machine Learning · Computer Science 2026-01-30 Young Kyung Kim , Oded Schlesinger , Qiangqiang Wu , J. Matías Di Martino , Guillermo Sapiro

Encountering shifted data at test time is a ubiquitous challenge when deploying predictive models. Test-time adaptation (TTA) methods address this issue by continuously adapting a deployed model using only unlabeled test data. While TTA can…

Machine Learning · Computer Science 2025-11-11 Mona Schirmer , Metod Jazbec , Christian A. Naesseth , Eric Nalisnick

Test-Time Adaptation (TTA) for black-box models accessible only via APIs remains a largely unexplored challenge. Existing approaches such as post-hoc output refinement offer limited adaptive capacity, while Zeroth-Order Optimization (ZOO)…

Machine Learning · Computer Science 2026-04-20 Yunbei Zhang , Shuaicheng Niu , Chengyi Cai , Feng Liu , Jihun Hamm

Convolutional Neural Networks (ConvNets) are trained offline using the few available data and may therefore suffer from substantial accuracy loss when ported on the field, where unseen input patterns received under unpredictable external…

Computer Vision and Pattern Recognition · Computer Science 2021-05-14 Luca Mocerino , Roberto G. Rizzo , Valentino Peluso , Andrea Calimera , Enrico Macii

State Space Models (SSMs) have emerged as efficient alternatives to Vision Transformers (ViTs), with VMamba standing out as a pioneering architecture designed for vision tasks. However, their generalization performance degrades…

Recently, Automatic Speech Recognition (ASR) systems (e.g., Whisper) have achieved remarkable accuracy improvements but remain highly sensitive to real-world unseen data (data with large distribution shifts), including noisy environments…

Sound · Computer Science 2026-03-06 Linghan Fang , Tianxin Xie , Li Liu

Mainstream Test-Time Adaptation (TTA) methods for adapting vision-language models, e.g., CLIP, typically rely on Shannon Entropy (SE) at test time to measure prediction uncertainty and inconsistency. However, since CLIP has a built-in bias…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Xiangyu Wu , Dongming Jiang , Feng Yu , Yueying Tian , Jiaqi Tang , Qing-Guo Chen , Yang Yang , Jianfeng Lu

Test-time adaptation (TTA) aims to adapt models to maintain reliable performance on non-stationary test streams without requiring labeled data. Despite its empirical success, the learnability of TTA under non-stationary streams remains…

Machine Learning · Computer Science 2026-05-28 Zhi Zhou , Ming Yang , Shi-Yu Tian , Kun-Yang Yu , Lan-Zhe Guo , Yu-Feng Li

Online Test-Time Adaptation (OTTA) has emerged as an effective strategy to handle distributional shifts, allowing on-the-fly adaptation of pre-trained models to new target domains during inference, without the need for source data. We…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 WeiQin Chuah , Ruwan Tennakoon , Alireza Bab-Hadiashar

Current test-time adaptation (TTA) approaches aim to adapt a machine learning model to environments that change continuously. Yet, it is unclear whether TTA methods can maintain their adaptability over prolonged periods. To answer this…

Computer Vision and Pattern Recognition · Computer Science 2024-11-05 Trung-Hieu Hoang , Duc Minh Vo , Minh N. Do

Test-time adaptation (TTA) of visual language models has recently attracted significant attention as a solution to the performance degradation caused by distribution shifts in downstream tasks. However, existing cache-based TTA methods have…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Haotian Zhai , Xinyu Chen , Can Zhang , Tianming Sha , Ruirui Li

Automated patent claim validation demands low error tolerance. However, existing approaches face a rigidity-resource dilemma: lightweight encoders cannot track long-range legal dependencies, while exhaustive LLM verification incurs 4-5X…

Computation and Language · Computer Science 2026-05-28 Yongmin Yoo , Qiongkai Xu , Longbing Cao

This paper introduces a robust zero-trust architecture (ZTA) tailored for the decentralized system that empowers efficient remote work and collaboration within IoT networks. Using blockchain-based federated learning principles, our proposed…

Cryptography and Security · Computer Science 2024-06-26 Shiva Raj Pokhrel , Luxing Yang , Sutharshan Rajasegarar , Gang Li

Test-Time Prompt Tuning (TPT) adapts vision-language models using augmented views, but its effectiveness is hindered by the challenge of determining which views are beneficial. Standard entropy-based filtering relies on the internal…

Computer Vision and Pattern Recognition · Computer Science 2026-04-15 Jungwon Choi , Eunwoo Kim

Supervised Fine-Tuning (SFT) is the standard paradigm for domain adaptation, yet it frequently incurs the cost of catastrophic forgetting. In sharp contrast, on-policy Reinforcement Learning (RL) effectively preserves general capabilities.…

Machine Learning · Computer Science 2026-01-06 Muxi Diao , Lele Yang , Wuxuan Gong , Yutong Zhang , Zhonghao Yan , Yufei Han , Kongming Liang , Weiran Xu , Zhanyu Ma

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

Mainstream test-time adaptation (TTA) techniques endeavor to mitigate distribution shifts via entropy minimization for multi-class classification, inherently increasing the probability of the most confident class. However, when encountering…

Computer Vision and Pattern Recognition · Computer Science 2025-02-07 Xiangyu Wu , Feng Yu , Qing-Guo Chen , Yang Yang , Jianfeng Lu

Real-world deployment often exposes models to distribution shifts, making test-time adaptation (TTA) critical for robustness. Yet most TTA methods are unfriendly to edge deployment, as they rely on backpropagation, activation buffering, or…

Machine Learning · Computer Science 2026-05-08 Xinyu Luo , Jie Liu , Kecheng Chen , Junyi Yang , Bo Ding , Arindam Basu , Haoliang Li

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

Computer Vision and Pattern Recognition · Computer Science 2023-10-27 Robert A. Marsden , Mario Döbler , Bin Yang

Test-time adaptation (TTA) has been widely explored to prevent performance degradation when test data differ from the training distribution. However, fully leveraging the rich representations of large pretrained models with minimal…

Computer Vision and Pattern Recognition · Computer Science 2026-04-15 Sunghyun Baek , Jaemyung Yu , Seunghee Koh , Minsu Kim , Hyeonseong Jeon , Junmo Kim