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Active feature acquisition (AFA) is a sequential decision-making problem where the goal is to improve model performance for test instances by adaptively selecting which features to acquire. In practice, AFA methods often learn from…

Machine Learning · Computer Science 2025-10-15 Yuta Kobayashi , Zilin Jing , Jiayu Yao , Hongseok Namkoong , Shalmali Joshi

Active feature acquisition (AFA) agents, crucial in domains like healthcare where acquiring features is often costly or harmful, determine the optimal set of features for a subsequent classification task. As deploying an AFA agent…

Machine Learning · Statistics 2023-12-08 Henrik von Kleist , Alireza Zamanian , Ilya Shpitser , Narges Ahmidi

We develop novel methodology for active feature acquisition (AFA), the study of how to sequentially acquire a dynamic (on a per instance basis) subset of features that minimizes acquisition costs whilst still yielding accurate predictions.…

Machine Learning · Computer Science 2023-02-28 Michael Valancius , Max Lennon , Junier Oliva

Deep Learning for medical imaging faces challenges in adapting and generalizing to new contexts. Additionally, it often lacks sufficient labeled data for specific tasks requiring significant annotation effort. Continual Learning (CL)…

Computer Vision and Pattern Recognition · Computer Science 2025-01-15 Rui Daniel , M. Rita Verdelho , Catarina Barata , Carlos Santiago

In many critical domains, features are not freely available at inference time: each measurement may come with a cost of time, money, and risk. Longitudinal prediction further complicates this setting because both features and labels evolve…

Machine Learning · Computer Science 2026-02-10 Dzung Dinh , Boqi Chen , Yunni Qu , Marc Niethammer , Junier Oliva

Global contexts in images are quite valuable in image-to-image translation problems. Conventional attention-based and graph-based models capture the global context to a large extent, however, these are computationally expensive. Moreover,…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Ayush Singh , Yash Bhambhu , Himanshu Buckchash , Deepak K. Gupta , Dilip K. Prasad

Truly intelligent systems are expected to make critical decisions with incomplete and uncertain data. Active feature acquisition (AFA), where features are sequentially acquired to improve the prediction, is a step towards this goal.…

Machine Learning · Computer Science 2021-07-12 Yang Li , Siyuan Shan , Qin Liu , Junier B. Oliva

Recent proposed neural network-based Temporal Action Detection (TAD) models are inherently limited to extracting the discriminative representations and modeling action instances with various lengths from complex scenes by shared-weights…

Computer Vision and Pattern Recognition · Computer Science 2024-07-04 Le Yang , Ziwei Zheng , Yizeng Han , Hao Cheng , Shiji Song , Gao Huang , Fan Li

In many real-world scenarios, acquiring all features of a data instance can be expensive or impractical due to monetary cost, latency, or privacy concerns. Active Feature Acquisition (AFA) addresses this challenge by dynamically selecting a…

Machine Learning · Computer Science 2026-02-24 Valter Schütz , Han Wu , Reza Rezvan , Linus Aronsson , Morteza Haghir Chehreghani

Active feature acquisition (AFA) is an instance-adaptive paradigm in which, at inference time, a policy sequentially chooses which features to acquire (at a cost) before predicting. Existing approaches either train reinforcement learning…

Artificial Intelligence · Computer Science 2026-02-05 Hung-Tien Huang , Dzung Dinh , Junier B. Oliva

To enhance the interpretability of Reinforcement Learning (RL), we propose Revealing Evolutionary Action Consequence Trajectories (REACT). In contrast to the prevalent practice of validating RL models based on their optimal behavior learned…

Machine Learning · Computer Science 2024-04-05 Philipp Altmann , Céline Davignon , Maximilian Zorn , Fabian Ritz , Claudia Linnhoff-Popien , Thomas Gabor

Human agents routinely reason on instances with incomplete and muddied data (and weigh the cost of obtaining further features). In contrast, much of ML is devoted to the unrealistic, sterile environment where all features are observed and…

Machine Learning · Computer Science 2024-10-08 Yang Li , Junier Oliva

Active Feature Acquisition is an instance-wise, sequential decision making problem. The aim is to dynamically select which feature to measure based on current observations, independently for each test instance. Common approaches either use…

Machine Learning · Computer Science 2025-08-07 Alexander Norcliffe , Changhee Lee , Fergus Imrie , Mihaela van der Schaar , Pietro Lio

We introduce a challenging decision-making task that we call active acquisition for multimodal temporal data (A2MT). In many real-world scenarios, input features are not readily available at test time and must instead be acquired at…

This work aims at advancing temporal action detection (TAD) using an encoder-decoder framework with action queries, similar to DETR, which has shown great success in object detection. However, the framework suffers from several problems if…

Computer Vision and Pattern Recognition · Computer Science 2022-07-15 Dingfeng Shi , Yujie Zhong , Qiong Cao , Jing Zhang , Lin Ma , Jia Li , Dacheng Tao

Prefix-based methods have emerged as a promising paradigm for Controllable Text Generation (CTG) due to their parameter efficiency. However, while effective in short sequences, their controllability tends to diminish as the generated…

Computation and Language · Computer Science 2026-05-19 Jiabing Yang , Yixiang Chen , Zichen Wen , Chenhang Cui , Peiyan Li , Yuan Xu , Bowen Fang , Tao Yu , Ruikang Lin , Yan Huang , Liang Wang

Continual test-time domain adaptation (CTTA) aims to adjust models so that they can perform well over time across non-stationary environments. While previous methods have made considerable efforts to optimize the adaptation process, a…

Computer Vision and Pattern Recognition · Computer Science 2026-02-09 Yanshuo Wang , Jinguang Tong , Jun Lan , Weiqiang Wang , Huijia Zhu , Haoxing Chen , Xuesong Li , Jie Hong

Long-term action quality assessment (AQA) focuses on evaluating the quality of human activities in videos lasting up to several minutes. This task plays an important role in the automated evaluation of artistic sports such as rhythmic…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Xin Wang , Peng-Jie Li , Yuan-Yuan Shen

Active Domain Adaptation (ADA) queries the labels of a small number of selected target samples to help adapting a model from a source domain to a target domain. The local context of queried data is important, especially when the domain gap…

Machine Learning · Computer Science 2023-08-29 Tao Sun , Cheng Lu , Haibin Ling

While Large Audio Language Models (LALMs) achieve strong performance on short audio, they degrade on long-form inputs. This degradation is more severe in temporal awareness tasks, where temporal alignment becomes increasingly inaccurate as…

Audio and Speech Processing · Electrical Eng. & Systems 2026-04-27 Mingchen Shao , Hang Su , Wenjie Tian , Bingshen Mu , Zhennan Lin , Lichun Fan , Zhenbo Luo , Jian Luan , Lei Xie
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