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Medical image segmentation is a pivotal step in diagnostic and therapeutic processes, relying on high-quality annotated data that is often challenging and costly to obtain. Semi-supervised learning offers a promising approach to enhance…

Image and Video Processing · Electrical Eng. & Systems 2025-07-08 Yuxuan Cheng , Chenxi Shao , Jie Ma , Yunfei Xie , Guoliang Li

We target at the task of weakly-supervised action localization (WSAL), where only video-level action labels are available during model training. Despite the recent progress, existing methods mainly embrace a localization-by-classification…

Computer Vision and Pattern Recognition · Computer Science 2022-04-01 Junyu Gao , Mengyuan Chen , Changsheng Xu

Weakly Supervised Semantic Segmentation (WSSS) using only image-level labels has gained significant attention due to its cost-effectiveness. The typical framework involves using image-level labels as training data to generate pixel-level…

Computer Vision and Pattern Recognition · Computer Science 2024-11-28 Wangyu Wu , Tianhong Dai , Zhenhong Chen , Xiaowei Huang , Jimin Xiao , Fei Ma , Renrong Ouyang

Recent studies of large-scale contrastive pretraining in the text embedding domain show that using single-source minibatches, rather than mixed-source minibatches, can substantially improve overall model accuracy. In this work, we explore…

Machine Learning · Computer Science 2024-07-29 Luke Merrick

Few-shot text classification has recently been promoted by the meta-learning paradigm which aims to identify target classes with knowledge transferred from source classes with sets of small tasks named episodes. Despite their success,…

Computation and Language · Computer Science 2023-05-17 Junfan Chen , Richong Zhang , Yongyi Mao , Jie Xu

Distance-based anomaly detection methods rely on compact in-distribution (ID) embeddings that are well separated from anomalies. However, conventional contrastive learning strategies often struggle to achieve this balance, either promoting…

Machine Learning · Computer Science 2026-02-02 Willian T. Lunardi , Abdulrahman Banabila , Dania Herzalla , Martin Andreoni

Self-supervised contrastive representation learning has proved incredibly successful in the vision and natural language domains, enabling state-of-the-art performance with orders of magnitude less labeled data. However, such methods are…

Machine Learning · Computer Science 2022-03-17 Dara Bahri , Heinrich Jiang , Yi Tay , Donald Metzler

Unsupervised disentangled representation learning is a long-standing problem in computer vision. This work proposes a novel framework for performing image clustering from deep embeddings by combining instance-level contrastive learning with…

Machine Learning · Computer Science 2021-10-05 Ramakrishnan Sundareswaran , Jansel Herrera-Gerena , John Just , Ali Jannesari

We propose Few-Example Clustering (FEC), a novel algorithm that performs contrastive learning to cluster few examples. Our method is composed of the following three steps: (1) generation of candidate cluster assignments, (2) contrastive…

Machine Learning · Computer Science 2022-07-12 Minguk Jang , Sae-Young Chung

Although deep learning-based methods have achieved excellent performance on SAR ATR, the fact that it is difficult to acquire and label a lot of SAR images makes these methods, which originally performed well, perform weakly. This may be…

Image and Video Processing · Electrical Eng. & Systems 2023-08-23 Chenwei Wang , Siyi Luo , Jifang Pei , Yulin Huang , Yin Zhang , Jianyu Yang

The deep neural networks (DNNs) have freed the synthetic aperture radar automatic target recognition (SAR ATR) from expertise-based feature designing and demonstrated superiority over conventional solutions. There has been shown the unique…

Computer Vision and Pattern Recognition · Computer Science 2023-04-05 Bowen Peng , Jianyue Xie , Bo Peng , Li Liu

Few-shot classification tends to struggle when it needs to adapt to diverse domains. Due to the non-overlapping label space between domains, the performance of conventional domain adaptation is limited. Previous work tackles the problem in…

Computation and Language · Computer Science 2020-06-24 Xin Cong , Bowen Yu , Tingwen Liu , Shiyao Cui , Hengzhu Tang , Bin Wang

Recently, many unsupervised deep learning methods have been proposed to learn clustering with unlabelled data. By introducing data augmentation, most of the latest methods look into deep clustering from the perspective that the original…

Computer Vision and Pattern Recognition · Computer Science 2020-08-28 Huasong Zhong , Chong Chen , Zhongming Jin , Xian-Sheng Hua

The memory dictionary-based contrastive learning method has achieved remarkable results in the field of unsupervised person Re-ID. However, The method of updating memory based on all samples does not fully utilize the hardest sample to…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Lingzhi Liu , Haiyang Zhang , Chengwei Tang , Tiantian Zhang

Detecting small targets in sea clutter is challenging due to dynamic maritime conditions. Existing solutions either model sea clutter for detection or extract target features based on clutter-target echo differences, including statistical…

Computer Vision and Pattern Recognition · Computer Science 2025-01-10 Junjie Wang , Yuze Gao , Dongying Li , Wenxian Yu

Small area change detection from synthetic aperture radar (SAR) is a highly challenging task. In this paper, a robust unsupervised approach is proposed for small area change detection from multi-temporal SAR images using deep learning.…

Computer Vision and Pattern Recognition · Computer Science 2020-11-24 Xinzheng Zhang , Hang Su , Ce Zhang , Xiaowei Gu , Xiaoheng Tan , Peter M. Atkinson

Achieving both efficiency and strong discriminative ability in lightweight visual tracking is a challenge, especially on mobile and edge devices with limited computational resources. Conventional lightweight trackers often struggle with…

Computer Vision and Pattern Recognition · Computer Science 2025-02-28 Juntao Liang , Jun Hou , Weijun Zhang , Yong Wang

Learning with few labeled data is a key challenge for visual recognition, as deep neural networks tend to overfit using a few samples only. One of the Few-shot learning methods called metric learning addresses this challenge by first…

Computer Vision and Pattern Recognition · Computer Science 2022-03-28 Li Ke , Meng Pan , Weigao Wen , Dong Li

Unsupervised Re-ID methods aim at learning robust and discriminative features from unlabeled data. However, existing methods often ignore the relationship between module parameters of Re-ID framework and feature distributions, which may…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Ziqi He , Mengjia Xue , Yunhao Du , Zhicheng Zhao , Fei Su

In modern advertising and recommender systems, multi-task learning (MTL) paradigm has been widely employed to jointly predict diverse user feedbacks (e.g. click and purchase). While, existing MTL approaches are either rigid to adapt to…

Information Retrieval · Computer Science 2023-02-07 Zihan Lin , Xuanhua Yang , Xiaoyu Peng , Wayne Xin Zhao , Shaoguo Liu , Liang Wang , Bo Zheng