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State-of-the-art pre-trained image models predominantly adopt a two-stage approach: initial unsupervised pre-training on large-scale datasets followed by task-specific fine-tuning using Cross-Entropy loss~(CE). However, it has been…

Computer Vision and Pattern Recognition · Computer Science 2024-11-18 Zijun Long , George Killick , Lipeng Zhuang , Gerardo Aragon-Camarasa , Zaiqiao Meng , Richard Mccreadie

Real-scene image super-resolution aims to restore real-world low-resolution images into their high-quality versions. A typical RealSR framework usually includes the optimization of multiple criteria which are designed for different image…

Computer Vision and Pattern Recognition · Computer Science 2022-07-27 Yukai Shi , Hao Li , Sen Zhang , Zhijing Yang , Xiao Wang

With the recent promising results of contrastive learning in the self-supervised learning paradigm, supervised contrastive learning has successfully extended these contrastive approaches to supervised contexts, outperforming cross-entropy…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Jaewon Kim , Hyukjong Lee , Jooyoung Chang , Sang Min Park

Deep neural network-based classifiers trained with the categorical cross-entropy (CCE) loss are sensitive to label noise in the training data. One common type of method that can mitigate the impact of label noise can be viewed as supervised…

Computer Vision and Pattern Recognition · Computer Science 2021-04-20 Aritra Ghosh , Andrew Lan

Semi-supervised learning (SSL) has achieved great success in leveraging a large amount of unlabeled data to learn a promising classifier. A popular approach is pseudo-labeling that generates pseudo labels only for those unlabeled data with…

Computer Vision and Pattern Recognition · Computer Science 2022-12-29 Qinyi Deng , Yong Guo , Zhibang Yang , Haolin Pan , Jian Chen

Clustering of hyperspectral images is a fundamental but challenging task. The recent development of hyperspectral image clustering has evolved from shallow models to deep and achieved promising results in many benchmark datasets. However,…

Computer Vision and Pattern Recognition · Computer Science 2021-11-16 Yaoming Cai , Zijia Zhang , Yan Liu , Pedram Ghamisi , Kun Li , Xiaobo Liu , Zhihua Cai

Contrastive learning has recently established itself as a powerful self-supervised learning framework for extracting rich and versatile data representations. Broadly speaking, contrastive learning relies on a data augmentation scheme to…

Machine Learning · Computer Science 2023-05-02 Ilgee Hong , Huy Tran , Claire Donnat

Contrastive learning is a well-established paradigm in representation learning. The standard framework of contrastive learning minimizes the distance between "similar" instances and maximizes the distance between dissimilar ones in the…

Machine Learning · Computer Science 2025-02-06 Naghmeh Ghanooni , Barbod Pajoum , Harshit Rawal , Sophie Fellenz , Vo Nguyen Le Duy , Marius Kloft

This paper is concerned with contrastive learning (CL) for low-level image restoration and enhancement tasks. We propose a new label-efficient learning paradigm based on residuals, residual contrastive learning (RCL), and derive an…

Computer Vision and Pattern Recognition · Computer Science 2022-04-28 Nanqing Dong , Matteo Maggioni , Yongxin Yang , Eduardo Pérez-Pellitero , Ales Leonardis , Steven McDonagh

Contrastive learning applied to self-supervised representation learning has seen a resurgence in recent years, leading to state of the art performance in the unsupervised training of deep image models. Modern batch contrastive approaches…

Machine Learning · Computer Science 2021-03-12 Prannay Khosla , Piotr Teterwak , Chen Wang , Aaron Sarna , Yonglong Tian , Phillip Isola , Aaron Maschinot , Ce Liu , Dilip Krishnan

The learn-to-compare paradigm of contrastive representation learning (CRL), which compares positive samples with negative ones for representation learning, has achieved great success in a wide range of domains, including natural language…

Information Retrieval · Computer Science 2022-06-02 Lanling Xu , Jianxun Lian , Wayne Xin Zhao , Ming Gong , Linjun Shou , Daxin Jiang , Xing Xie , Ji-Rong Wen

Collecting labeled data for the task of semantic segmentation is expensive and time-consuming, as it requires dense pixel-level annotations. While recent Convolutional Neural Network (CNN) based semantic segmentation approaches have…

Computer Vision and Pattern Recognition · Computer Science 2021-08-20 Xiangyun Zhao , Raviteja Vemulapalli , Philip Mansfield , Boqing Gong , Bradley Green , Lior Shapira , Ying Wu

Despite its empirical success, the theoretical foundations of self-supervised contrastive learning (CL) are not yet fully established. In this work, we address this gap by showing that standard CL objectives implicitly approximate a…

Machine Learning · Computer Science 2025-11-12 Achleshwar Luthra , Tianbao Yang , Tomer Galanti

Contrastive learning has emerged as an essential approach for self-supervised learning in visual representation learning. The central objective of contrastive learning is to maximize the similarities between two augmented versions of an…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Hengkui Dong , Xianzhong Long , Yun Li , Lei Chen

While contrastive learning is proven to be an effective training strategy in computer vision, Natural Language Processing (NLP) is only recently adopting it as a self-supervised alternative to Masked Language Modeling (MLM) for improving…

Computation and Language · Computer Science 2021-09-16 Hooman Sedghamiz , Shivam Raval , Enrico Santus , Tuka Alhanai , Mohammad Ghassemi

Self-supervised learning has gained popularity because of its ability to avoid the cost of annotating large-scale datasets. It is capable of adopting self-defined pseudo labels as supervision and use the learned representations for several…

Computer Vision and Pattern Recognition · Computer Science 2021-02-09 Ashish Jaiswal , Ashwin Ramesh Babu , Mohammad Zaki Zadeh , Debapriya Banerjee , Fillia Makedon

Long-tailed semi-supervised learning poses a significant challenge in training models with limited labeled data exhibiting a long-tailed label distribution. Current state-of-the-art LTSSL approaches heavily rely on high-quality…

Machine Learning · Computer Science 2024-10-10 Zi-Hao Zhou , Siyuan Fang , Zi-Jing Zhou , Tong Wei , Yuanyu Wan , Min-Ling Zhang

This paper presents Prototypical Contrastive Learning (PCL), an unsupervised representation learning method that addresses the fundamental limitations of instance-wise contrastive learning. PCL not only learns low-level features for the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 Junnan Li , Pan Zhou , Caiming Xiong , Steven C. H. Hoi

Detecting lane markings in road scenes poses a challenge due to their intricate nature, which is susceptible to unfavorable conditions. While lane markings have strong shape priors, their visibility is easily compromised by lighting…

Computer Vision and Pattern Recognition · Computer Science 2024-08-21 Ali Zoljodi , Sadegh Abadijou , Mina Alibeigi , Masoud Daneshtalab

While effective in recommendation tasks, collaborative filtering (CF) techniques face the challenge of data sparsity. Researchers have begun leveraging contrastive learning to introduce additional self-supervised signals to address this.…

Information Retrieval · Computer Science 2024-02-20 Peijie Sun , Le Wu , Kun Zhang , Xiangzhi Chen , Meng Wang