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Active learning (AL) has emerged as a crucial strategy for reducing the prohibitive costs associated with medical image segmentation. However, standard uncertainty-based AL methods typically focus on maximizing performance metrics, ignoring…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Ghazal Danaee , Mélanie Gaillochet , Christian Desrosiers , Herve Lombaert , Sylvain Bouix

In this paper, we study asynchronous federated learning (FL) in a wireless distributed learning network (WDLN). To allow each edge device to use its local data more efficiently via asynchronous FL, transmission scheduling in the WDLN for…

Information Theory · Computer Science 2021-08-31 Hyun-Suk Lee , Jang-Won Lee

Pretrained on web-scale open data, VLMs offer powerful capabilities for solving downstream tasks after being adapted to task-specific labeled data. Yet, data labeling can be expensive and may demand domain expertise. Active Learning (AL)…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Tong Wang , Jiaqi Wang , Shu Kong

In multi-domain learning (MDL) scenarios, high labeling effort is required due to the complexity of collecting data from various domains. Active Learning (AL) presents an encouraging solution to this issue by annotating a smaller number of…

Machine Learning · Computer Science 2023-06-21 Rui He , Zeyu Dai , Shan He , Ke Tang

Delay-and-sum (DAS) algorithms are widely used for beamforming in linear array photoacoustic imaging systems and are characterized by fast execution. However, these algorithms suffer from various drawbacks like low resolution, low contrast,…

Medical Physics · Physics 2021-07-29 Souradip Paul , Subhamoy Mandal , Mayanglambam Suheshkumar Singh

Accurate automatic medical image segmentation relies on high-quality, dense annotations, which are costly and time-consuming. Weakly supervised learning provides a more efficient alternative by leveraging sparse and coarse annotations…

Computer Vision and Pattern Recognition · Computer Science 2025-06-24 Dongdong Meng , Sheng Li , Hao Wu , Suqing Tian , Wenjun Ma , Guoping Wang , Xueqing Yan

Supervised machine learning-based medical image computing applications necessitate expert label curation, while unlabelled image data might be relatively abundant. Active learning methods aim to prioritise a subset of available image data…

Annotating the right set of data amongst all available data points is a key challenge in many machine learning applications. Batch active learning is a popular approach to address this, in which batches of unlabeled data points are selected…

Machine Learning · Statistics 2021-04-20 Amirata Ghorbani , James Zou , Andre Esteva

Active learning (AL) is a training paradigm for selecting unlabeled samples for annotation to improve model performance on a test set, which is useful when only a limited number of samples can be annotated. These algorithms often work by…

Computation and Language · Computer Science 2026-04-13 Lorenzo Jaime Yu Flores , Cesare Spinoso di-Piano , Ori Ernst , David Ifeoluwa Adelani , Jackie Chi Kit Cheung

Fine-tuning is widely applied in image classification tasks as a transfer learning approach. It re-uses the knowledge from a source task to learn and obtain a high performance in target tasks. Fine-tuning is able to alleviate the challenge…

Computer Vision and Pattern Recognition · Computer Science 2022-07-27 Xuyang Shen , Jo Plested , Sabrina Caldwell , Yiran Zhong , Tom Gedeon

Automatic medical image segmentation plays a critical role in scientific research and medical care. Existing high-performance deep learning methods typically rely on large training datasets with high-quality manual annotations, which are…

Image and Video Processing · Electrical Eng. & Systems 2021-11-17 Shanshan Wang , Cheng Li , Rongpin Wang , Zaiyi Liu , Meiyun Wang , Hongna Tan , Yaping Wu , Xinfeng Liu , Hui Sun , Rui Yang , Xin Liu , Jie Chen , Huihui Zhou , Ismail Ben Ayed , Hairong Zheng

Image segmentation is a fundamental problem in biomedical image analysis. Recent advances in deep learning have achieved promising results on many biomedical image segmentation benchmarks. However, due to large variations in biomedical…

Computer Vision and Pattern Recognition · Computer Science 2017-06-16 Lin Yang , Yizhe Zhang , Jianxu Chen , Siyuan Zhang , Danny Z. Chen

Medical image segmentation faces critical challenges in semi-supervised learning scenarios due to severe annotation scarcity requiring expert radiological knowledge, significant inter-annotator variability across different viewpoints and…

Image and Video Processing · Electrical Eng. & Systems 2026-01-06 Zihan Li , Dandan Shan , Yunxiang Li , Paul E. Kinahan , Qingqi Hong

Active learning (AL) is an effective approach to select the most informative samples to label so as to reduce the annotation cost. Existing AL methods typically work under the closed-set assumption, i.e., all classes existing in the…

Computer Vision and Pattern Recognition · Computer Science 2023-07-12 Linhao Qu , Yingfan Ma , Zhiwei Yang , Manning Wang , Zhijian Song

Despite that deep learning has achieved state-of-the-art performance for medical image segmentation, its success relies on a large set of manually annotated images for training that are expensive to acquire. In this paper, we propose an…

Image and Video Processing · Electrical Eng. & Systems 2021-01-01 Lu Wang , Dong Guo , Guotai Wang , Shaoting Zhang

Supervised neural approaches are hindered by their dependence on large, meticulously annotated datasets, a requirement that is particularly cumbersome for sequential tasks. The quality of annotations tends to deteriorate with the transition…

Purpose: Echocardiography with point-of-care ultrasound (POCUS) must support clinical decision-making under tight bedside time and operator-effort constraints. We introduce a personalized data acquisition strategy in which an RL agent,…

Computer Vision and Pattern Recognition · Computer Science 2026-02-17 Armin Saadat , Nima Hashemi , Bahar Khodabakhshian , Michael Y. Tsang , Christina Luong , Teresa S. M. Tsang , Purang Abolmaesumi

Flow matching has recently emerged as a principled framework for learning continuous-time transport maps, enabling efficient ODE-based sampling without relying on stochastic diffusion processes. While generative modeling has shown promise…

Computer Vision and Pattern Recognition · Computer Science 2026-05-08 Zhi Chen , Runze Hu , Le Zhang

Existing self-supervised learning methods based on contrastive learning and masked image modeling have demonstrated impressive performances. However, current masked image modeling methods are mainly utilized in natural images, and their…

Computer Vision and Pattern Recognition · Computer Science 2023-02-28 Xiangtao Wang , Ruizhi Wang , Biao Tian , Jiaojiao Zhang , Shuo Zhang , Junyang Chen , Thomas Lukasiewicz , Zhenghua Xu

Biomedical audio signals, such as phonocardiograms (PCG), are inherently rhythmic and contain diagnostic information in both their spectral (tonal) and temporal domains. Standard 2D spectrograms provide rich spectral features but compromise…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-30 Md. Saiful Bari Siddiqui , Utsab Saha