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When modeling class-imbalanced data, it is crucial to address the imbalance, as models trained on such data tend to be biased towards the majority classes. This problem is amplified under partial supervision, where pseudo-labels for…

Machine Learning · Statistics 2026-05-08 Heegeon Yoon , Heeyoung Kim

We design an active learning algorithm for cost-sensitive multiclass classification: problems where different errors have different costs. Our algorithm, COAL, makes predictions by regressing to each label's cost and predicting the…

Machine Learning · Computer Science 2021-10-13 Akshay Krishnamurthy , Alekh Agarwal , Tzu-Kuo Huang , Hal Daume , John Langford

Open-set active learning (OSAL) aims to identify informative samples for annotation when unlabeled data may contain previously unseen classes-a common challenge in safety-critical and open-world scenarios. Existing approaches typically rely…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Chen-Chen Zong , Yu-Qi Chi , Xie-Yang Wang , Yan Cui , Sheng-Jun Huang

Image segmentation is one of the most essential biomedical image processing problems for different imaging modalities, including microscopy and X-ray in the Internet-of-Medical-Things (IoMT) domain. However, annotating biomedical images is…

Computer Vision and Pattern Recognition · Computer Science 2021-01-25 Ziyuan Zhao , Zeng Zeng , Kaixin Xu , Cen Chen , Cuntai Guan

In this work, we address the problem of learning an ensemble of specialist networks using multimodal data, while considering the realistic and challenging scenario of possible missing modalities at test time. Our goal is to leverage the…

Computer Vision and Pattern Recognition · Computer Science 2019-12-24 Nuno C. Garcia , Sarah Adel Bargal , Vitaly Ablavsky , Pietro Morerio , Vittorio Murino , Stan Sclaroff

The online emergence of multi-modal sharing platforms (eg, TikTok, Youtube) is powering personalized recommender systems to incorporate various modalities (eg, visual, textual and acoustic) into the latent user representations. While…

Information Retrieval · Computer Science 2023-07-19 Wei Wei , Chao Huang , Lianghao Xia , Chuxu Zhang

Active Learning (AL) is a machine learning technique where the model selectively queries the most informative data points for labeling by human experts. Integrating AL with crowdsourcing leverages crowd diversity to enhance data labeling…

Cryptography and Security · Computer Science 2025-03-04 Shaojie Hou , Yuandou Wang , Zhiming Zhao

Central to active learning (AL) is what data should be selected for annotation. Existing works attempt to select highly uncertain or informative data for annotation. Nevertheless, it remains unclear how selected data impacts the test…

Machine Learning · Computer Science 2022-01-25 Tianyang Wang , Xingjian Li , Pengkun Yang , Guosheng Hu , Xiangrui Zeng , Siyu Huang , Cheng-Zhong Xu , Min Xu

Multimodal Emotion Recognition (MER) aims to accurately identify human emotional states by integrating heterogeneous modalities such as visual, auditory, and textual data. Existing approaches predominantly rely on unified emotion labels to…

Computer Vision and Pattern Recognition · Computer Science 2025-11-20 Wen Yin , Siyu Zhan , Cencen Liu , Xin Hu , Guiduo Duan , Xiurui Xie , Yuan-Fang Li , Tao He

Ultrasound (US) is a non-invasive yet effective medical diagnostic imaging technique for the COVID-19 global pandemic. However, due to complex feature behaviors and expensive annotations of US images, it is difficult to apply Artificial…

Computer Vision and Pattern Recognition · Computer Science 2021-03-02 Lei Liu , Wentao Lei , Yongfang Luo , Cheng Feng , Xiang Wan , Li Liu

Active learning (AL) seeks to reduce annotation costs by selecting the most informative samples for labeling, making it particularly valuable in resource-constrained settings. However, traditional evaluation methods, which focus solely on…

Machine Learning · Computer Science 2025-07-22 Julia Machnio , Mads Nielsen , Mostafa Mehdipour Ghazi

Active learning (AL) is a subfield of machine learning (ML) in which a learning algorithm could achieve good accuracy with less training samples by interactively querying a user/oracle to label new data points. Pool-based AL is…

Machine Learning · Computer Science 2020-10-19 Xueying Zhan , Antoni Bert Chan

Multimodal learning (MML) is significantly constrained by modality imbalance, leading to suboptimal performance in practice. While existing approaches primarily focus on balancing the learning of different modalities to address this issue,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-30 QingYuan Jiang , Longfei Huang , Yang Yang

Recently, the cross-modal pretraining model has been employed to produce meaningful pseudo-labels to supervise the training of an image clustering model. However, numerous erroneous alignments in a cross-modal pre-training model could…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Liping Qiu , Qin Zhang , Xiaojun Chen , Shaotian Cai

Improving performance in multiple domains is a challenging task, and often requires significant amounts of data to train and test models. Active learning techniques provide a promising solution by enabling models to select the most…

Machine Learning · Computer Science 2023-04-14 Anand Gokul Mahalingam , Aayush Shah , Akshay Gulati , Royston Mascarenhas , Rakshitha Panduranga

Active learning (AL) techniques reduce labeling costs for training neural machine translation (NMT) models by selecting smaller representative subsets from unlabeled data for annotation. Diversity sampling techniques select heterogeneous…

Computation and Language · Computer Science 2024-12-19 Abdul Hameed Azeemi , Ihsan Ayyub Qazi , Agha Ali Raza

In clinical practice, crossmodal information including medical images and tabular data is essential for disease diagnosis. There exists a significant modality gap between these data types, which obstructs advancements in crossmodal…

Computer Vision and Pattern Recognition · Computer Science 2026-03-23 Tianling Liu , Hongying Liu , Fanhua Shang , Lequan Yu , Tong Han , Liang Wan

Multimodal networks have demonstrated remarkable performance improvements over their unimodal counterparts. Existing multimodal networks are designed in a multi-branch fashion that, due to the reliance on fusion strategies, exhibit…

Multimodal learning seeks to utilize data from multiple sources to improve the overall performance of downstream tasks. It is desirable for redundancies in the data to make multimodal systems robust to missing or corrupted observations in…

Computer Vision and Pattern Recognition · Computer Science 2024-10-14 Md Kaykobad Reza , Ashley Prater-Bennette , M. Salman Asif

In many machine learning applications, labeling datasets can be an arduous and time-consuming task. Although research has shown that semi-supervised learning techniques can achieve high accuracy with very few labels within the field of…

Computer Vision and Pattern Recognition · Computer Science 2023-06-07 Evelyn J. Mannix , Howard D. Bondell