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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

Traditional semi-supervised learning (SSL) assumes that the feature distributions of labeled and unlabeled data are consistent which rarely holds in realistic scenarios. In this paper, we propose a novel SSL setting, where unlabeled samples…

Computer Vision and Pattern Recognition · Computer Science 2024-06-03 Jiachen Liang , Ruibing Hou , Hong Chang , Bingpeng Ma , Shiguang Shan , Xilin Chen

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

Conventional semi-supervised contrastive learning methods assign pseudo-labels only to samples whose highest predicted class probability exceeds a predefined threshold, and then perform supervised contrastive learning using those selected…

Machine Learning · Computer Science 2026-01-09 Shogo Nakayama , Masahiro Okuda

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

We present Point-TTA, a novel test-time adaptation framework for point cloud registration (PCR) that improves the generalization and the performance of registration models. While learning-based approaches have achieved impressive progress,…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Ahmed Hatem , Yiming Qian , Yang Wang

Vision-language models (VLMs), despite their extraordinary zero-shot capabilities, are vulnerable to distribution shifts. Test-time adaptation (TTA) emerges as a predominant strategy to adapt VLMs to unlabeled test data on the fly. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-14 Zhichen Zeng , Wenxuan Bao , Xiao Lin , Ruizhong Qiu , Tianxin Wei , Xuying Ning , Yuchen Yan , Chen Luo , Monica Xiao Cheng , Jingrui He , Hanghang Tong

Prior to the deployment of robotic systems, pre-training the deep-recognition models on all potential visual cases is infeasible in practice. Hence, test-time adaptation (TTA) allows the model to adapt itself to novel environments and…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Junha Song , Kwanyong Park , InKyu Shin , Sanghyun Woo , Chaoning Zhang , In So Kweon

Test-time adaptation is a promising research direction that allows the source model to adapt itself to changes in data distribution without any supervision. Yet, current methods are usually evaluated on benchmarks that are only a…

Computer Vision and Pattern Recognition · Computer Science 2024-10-15 Damian Sójka , Sebastian Cygert , Bartłomiej Twardowski , Tomasz Trzciński

Fully test-time adaptation aims at adapting a pre-trained model to the test stream during real-time inference, which is urgently required when the test distribution differs from the training distribution. Several efforts have been devoted…

Machine Learning · Computer Science 2023-01-31 Bowen Zhao , Chen Chen , Shu-Tao Xia

Personalized federated learning algorithms have shown promising results in adapting models to various distribution shifts. However, most of these methods require labeled data on testing clients for personalization, which is usually…

Machine Learning · Computer Science 2023-10-31 Wenxuan Bao , Tianxin Wei , Haohan Wang , Jingrui He

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

A weakly-supervised learning framework named as complementary-label learning has been proposed recently, where each sample is equipped with a single complementary label that denotes one of the classes the sample does not belong to. However,…

Machine Learning · Statistics 2020-07-24 Yuzhou Cao , Shuqi Liu , Yitian Xu

The issue of source-free time-series domain adaptations still gains scarce research attentions. On the other hand, existing approaches rely solely on time-domain features ignoring frequency components providing complementary information.…

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

Surface defect detection is significant in industrial production. However, detecting defects with varying textures and anomaly classes during the test time is challenging. This arises due to the differences in data distributions between…

Computer Vision and Pattern Recognition · Computer Science 2024-08-20 Yiran Song , Qianyu Zhou , Lizhuang Ma

Domain shift is a significant challenge in machine learning, particularly in medical applications where data distributions differ across institutions due to variations in data collection practices, equipment, and procedures. This can…

Machine Learning · Computer Science 2025-06-30 Takumi Okuo , Shinnosuke Matsuo , Shota Harada , Kiyohito Tanaka , Ryoma Bise

Tabular data plays a vital role in various real-world scenarios and finds extensive applications. Although recent deep tabular models have shown remarkable success, they still struggle to handle data distribution shifts, leading to…

Machine Learning · Computer Science 2024-12-17 Zhi Zhou , Kun-Yang Yu , Lan-Zhe Guo , Yu-Feng Li

Alleviating noisy pseudo labels remains a key challenge in Semi-Supervised Temporal Action Localization (SS-TAL). Existing methods often filter pseudo labels based on strict conditions, but they typically assess classification and…

Computer Vision and Pattern Recognition · Computer Science 2024-07-26 Feixiang Zhou , Bryan Williams , Hossein Rahmani

This paper proposes a novel online evaluation protocol for Test Time Adaptation (TTA) methods, which penalizes slower methods by providing them with fewer samples for adaptation. TTA methods leverage unlabeled data at test time to adapt to…

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