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Contrastive learning, especially self-supervised contrastive learning (SSCL), has achieved great success in extracting powerful features from unlabeled data. In this work, we contribute to the theoretical understanding of SSCL and uncover…

机器学习 · 计算机科学 2023-06-05 Tianyang Hu , Zhili Liu , Fengwei Zhou , Wenjia Wang , Weiran Huang

Metric learning seeks perceptual embeddings where visually similar instances are close and dissimilar instances are apart, but learned representations can be sub-optimal when the distribution of intra-class samples is diverse and distinct…

机器学习 · 计算机科学 2021-08-30 Elad Levi , Tete Xiao , Xiaolong Wang , Trevor Darrell

In Self-Supervised Learning (SSL), various pretext tasks are designed for learning feature representations through contrastive loss. However, previous studies have shown that this loss is less tolerant to semantically similar samples due to…

音频与语音处理 · 电气工程与系统科学 2023-03-07 Shanshan Wang , Soumya Tripathy , Annamaria Mesaros

We explore the value of weak labels in learning transferable representations for medical images. Compared to hand-labeled datasets, weak or inexact labels can be acquired in large quantities at significantly lower cost and can provide…

计算机视觉与模式识别 · 计算机科学 2021-08-05 Boon Peng Yap , Beng Koon Ng

Semi-supervised learning has been an effective paradigm for leveraging unlabeled data to reduce the reliance on labeled data. We propose CoMatch, a new semi-supervised learning method that unifies dominant approaches and addresses their…

机器学习 · 计算机科学 2021-03-04 Junnan Li , Caiming Xiong , Steven Hoi

An effective framework for learning 3D representations for perception tasks is distilling rich self-supervised image features via contrastive learning. However, image-to point representation learning for autonomous driving datasets faces…

计算机视觉与模式识别 · 计算机科学 2023-03-27 Anas Mahmoud , Jordan S. K. Hu , Tianshu Kuai , Ali Harakeh , Liam Paull , Steven L. Waslander

We propose a framework for sequence-to-sequence contrastive learning (SeqCLR) of visual representations, which we apply to text recognition. To account for the sequence-to-sequence structure, each feature map is divided into different…

计算机视觉与模式识别 · 计算机科学 2020-12-22 Aviad Aberdam , Ron Litman , Shahar Tsiper , Oron Anschel , Ron Slossberg , Shai Mazor , R. Manmatha , Pietro Perona

Task-incremental continual learning refers to continually training a model in a sequence of tasks while overcoming the problem of catastrophic forgetting (CF). The issue arrives for the reason that the learned representations are forgotten…

机器学习 · 计算机科学 2023-05-23 Yun Luo , Xiaotian Lin , Zhen Yang , Fandong Meng , Jie Zhou , Yue Zhang

Recommender systems are widely deployed in various web environments, and self-supervised learning (SSL) has recently attracted significant attention in this field. Contrastive learning (CL) stands out as a major SSL paradigm due to its…

信息检索 · 计算机科学 2025-01-17 Yu Zhang , Lei Sang , Yi Zhang , Yiwen Zhang , Yun Yang

Self-supervised learning enables networks to learn discriminative features from massive data itself. Most state-of-the-art methods maximize the similarity between two augmentations of one image based on contrastive learning. By utilizing…

计算机视觉与模式识别 · 计算机科学 2023-07-05 Jidong Ge , Yuxiang Liu , Jie Gui , Lanting Fang , Ming Lin , James Tin-Yau Kwok , LiGuo Huang , Bin Luo

Contrastive learning has been frequently investigated to learn effective representations for text clustering tasks. While existing contrastive learning-based text clustering methods only focus on modeling instance-wise semantic similarity…

计算与语言 · 计算机科学 2024-08-27 Qian Yong , Chen Chen , Xiabing Zhou

Self-supervised learning (SSL), in particular contrastive learning, has made great progress in recent years. However, a common theme in these methods is that they inherit the learning paradigm from the supervised deep learning scenario.…

计算机视觉与模式识别 · 计算机科学 2021-03-26 Yun-Hao Cao , Jianxin Wu

State-of-the-art natural language understanding classification models follow two-stages: pre-training a large language model on an auxiliary task, and then fine-tuning the model on a task-specific labeled dataset using cross-entropy loss.…

计算与语言 · 计算机科学 2021-04-06 Beliz Gunel , Jingfei Du , Alexis Conneau , Ves Stoyanov

Self-supervised instance discrimination is an effective contrastive pretext task to learn feature representations and address limited medical image annotations. The idea is to make features of transformed versions of the same images similar…

计算机视觉与模式识别 · 计算机科学 2022-11-17 Yejia Zhang , Xinrong Hu , Nishchal Sapkota , Yiyu Shi , Danny Z. Chen

Contrastive learning allows us to flexibly define powerful losses by contrasting positive pairs from sets of negative samples. Recently, the principle has also been used to learn cross-modal embeddings for video and text, yet without…

计算机视觉与模式识别 · 计算机科学 2021-10-01 Mohammadreza Zolfaghari , Yi Zhu , Peter Gehler , Thomas Brox

Cross-modal image-text retrieval is challenging because of the diverse possible associations between content from different modalities. Traditional methods learn a single-vector embedding to represent semantics of each sample, but struggle…

计算机视觉与模式识别 · 计算机科学 2025-06-27 Hani Alomari , Anushka Sivakumar , Andrew Zhang , Chris Thomas

Pseudo supervision is regarded as the core idea in semi-supervised learning for semantic segmentation, and there is always a tradeoff between utilizing only the high-quality pseudo labels and leveraging all the pseudo labels. Addressing…

计算机视觉与模式识别 · 计算机科学 2023-02-20 Siqi Fan , Fenghua Zhu , Zunlei Feng , Yisheng Lv , Mingli Song , Fei-Yue Wang

Recent breakthroughs in semi-supervised semantic segmentation have been developed through contrastive learning. In prevalent pixel-wise contrastive learning solutions, the model maps pixels to deterministic representations and regularizes…

计算机视觉与模式识别 · 计算机科学 2022-12-19 Haoyu Xie , Changqi Wang , Mingkai Zheng , Minjing Dong , Shan You , Chong Fu , Chang Xu

Recent multimodal models such as Contrastive Language-Image Pre-training (CLIP) have shown remarkable ability to align visual and linguistic representations. However, domains where small visual differences carry large semantic significance,…

计算机视觉与模式识别 · 计算机科学 2026-03-03 Hiroshi Sasaki

Vision transformers combined with self-supervised learning have enabled the development of models which scale across large datasets for several downstream tasks like classification, segmentation and detection. The low-shot learning…

计算机视觉与模式识别 · 计算机科学 2024-06-26 Srinivasa Rao Nandam , Sara Atito , Zhenhua Feng , Josef Kittler , Muhammad Awais