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Self-supervised contrastive learning offers a means of learning informative features from a pool of unlabeled data. In this paper, we delve into another useful approach -- providing a way of selecting a core-set that is entirely unlabeled.…

Machine Learning · Computer Science 2021-04-08 Jeongwoo Ju , Heechul Jung , Yoonju Oh , Junmo Kim

A label-efficient paradigm in computer vision is based on self-supervised contrastive pre-training on unlabeled data followed by fine-tuning with a small number of labels. Making practical use of a federated computing environment in the…

Machine Learning · Computer Science 2021-09-17 Nanqing Dong , Irina Voiculescu

Existed pre-training methods either focus on single-modal tasks or multi-modal tasks, and cannot effectively adapt to each other. They can only utilize single-modal data (i.e. text or image) or limited multi-modal data (i.e. image-text…

Computation and Language · Computer Science 2022-03-15 Wei Li , Can Gao , Guocheng Niu , Xinyan Xiao , Hao Liu , Jiachen Liu , Hua Wu , Haifeng Wang

We introduce Cluster Contrast (CueCo), a novel approach to unsupervised visual representation learning that effectively combines the strengths of contrastive learning and clustering methods. Inspired by recent advancements, CueCo is…

Computer Vision and Pattern Recognition · Computer Science 2025-07-17 Nikolaos Giakoumoglou , Tania Stathaki

Self-training methods have proven to be effective in exploiting abundant unlabeled data in semi-supervised learning, particularly when labeled data is scarce. While many of these approaches rely on a cross-entropy loss function (CE), recent…

Machine Learning · Computer Science 2024-09-12 Aurelien Gauffre , Julien Horvat , Massih-Reza Amini

A steady momentum of innovations and breakthroughs has convincingly pushed the limits of unsupervised image representation learning. Compared to static 2D images, video has one more dimension (time). The inherent supervision existing in…

Computer Vision and Pattern Recognition · Computer Science 2021-01-28 Ting Yao , Yiheng Zhang , Zhaofan Qiu , Yingwei Pan , Tao Mei

Supervised deep learning methods require a large repository of annotated data; hence, label noise is inevitable. Training with such noisy data negatively impacts the generalization performance of deep neural networks. To combat label noise,…

Computer Vision and Pattern Recognition · Computer Science 2022-04-28 Nazmul Karim , Mamshad Nayeem Rizve , Nazanin Rahnavard , Ajmal Mian , Mubarak Shah

Current vision-language models have been explored for multi-modal embedding tasks like information retrieval. However, they face significant challenges in real-world queries and targets involving diverse modality combinations, as existing…

Computer Vision and Pattern Recognition · Computer Science 2026-05-07 Jiajun Qin , Yuan Pu , Zhuolun He , Seunggeun Kim , David Z. Pan , Bei Yu

Automated animal censuses with aerial imagery are a vital ingredient towards wildlife conservation. Recent models are generally based on supervised learning and thus require vast amounts of training data. Due to their scarcity and minuscule…

Computer Vision and Pattern Recognition · Computer Science 2022-11-11 Xiaochen Zheng

We study Online Continual Learning with missing labels and propose SemiCon, a new contrastive loss designed for partly labeled data. We demonstrate its efficiency by devising a memory-based method trained on an unlabeled data stream, where…

Machine Learning · Computer Science 2022-11-23 Nicolas Michel , Romain Negrel , Giovanni Chierchia , Jean-François Bercher

Contrastive language-image Pre-training (CLIP) [13] can leverage large datasets of unlabeled Image-Text pairs, which have demonstrated impressive performance in various downstream tasks. Given that annotating medical data is time-consuming…

Image and Video Processing · Electrical Eng. & Systems 2023-07-13 Yuhao Wang

Limited availability of labeled physiological data often prohibits the use of powerful supervised deep learning models in the biomedical machine intelligence domain. We approach this problem and propose a novel encoding framework that…

Machine Learning · Computer Science 2023-06-13 Philipp Hallgarten , David Bethge , Ozan Özdenizci , Tobias Grosse-Puppendahl , Enkelejda Kasneci

Contrastive-based self-supervised learning methods achieved great success in recent years. However, self-supervision requires extremely long training epochs (e.g., 800 epochs for MoCo v3) to achieve promising results, which is unacceptable…

Computer Vision and Pattern Recognition · Computer Science 2022-07-20 Yuanzheng Ci , Chen Lin , Lei Bai , Wanli Ouyang

Universal Multimodal embedding models built on Multimodal Large Language Models (MLLMs) have traditionally employed contrastive learning, which aligns representations of query-target pairs across different modalities. Yet, despite its…

Information Retrieval · Computer Science 2026-04-03 Geonmo Gu , Byeongho Heo , Jaemyung Yu , Jaehui Hwang , Taekyung Kim , Sangmin Lee , HeeJae Jun , Yoohoon Kang , Sangdoo Yun , Dongyoon Han

Large-scale joint training of multimodal models, e.g., CLIP, have demonstrated great performance in many vision-language tasks. However, image-text pairs for pre-training are restricted to the intersection of images and texts, limiting…

Computer Vision and Pattern Recognition · Computer Science 2023-06-09 Yanan Sun , Zihan Zhong , Qi Fan , Chi-Keung Tang , Yu-Wing Tai

The self-supervised ultrasound (US) video model pretraining can use a small amount of labeled data to achieve one of the most promising results on US diagnosis. However, it does not take full advantage of multi-level knowledge for learning…

Computer Vision and Pattern Recognition · Computer Science 2022-10-14 Chunhui Zhang , Yixiong Chen , Li Liu , Qiong Liu , Xi Zhou

Unsupervised representation learning has shown remarkable achievement by reducing the performance gap with supervised feature learning, especially in the image domain. In this study, to extend the technique of unsupervised learning to the…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-23 Jangho Lee , Jaihyun Koh , Sungroh Yoon

Multimodal representation learning is a challenging task in which previous work mostly focus on either uni-modality pre-training or cross-modality fusion. In fact, we regard modeling multimodal representation as building a skyscraper, where…

Computation and Language · Computer Science 2024-08-15 Ronghao Lin , Haifeng Hu

Effective code retrieval is indispensable and it has become an important paradigm to search code in hybrid mode using both natural language and code snippets. Nevertheless, it remains unclear whether existing approaches can effectively…

Software Engineering · Computer Science 2026-03-09 Yang Yang , Li Kuang , Jiakun Liu , Zhongxin Liu , Yingjie Xia , David Lo

Unsupervised neural combinatorial optimization (NCO) offers an appealing alternative to supervised approaches by training learning-based solvers without ground-truth solutions, directly minimizing instance objectives and constraint…

Machine Learning · Computer Science 2026-03-13 Kien X. Nguyen , Ilya Safro