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To improve performance in visual feature representation from photos or videos for practical applications, we generally require large-scale human-annotated labeled data while training deep neural networks. However, the cost of gathering and…

计算机视觉与模式识别 · 计算机科学 2022-10-10 Zhenyuan Lu

Contrastive learning has recently shown immense potential in unsupervised visual representation learning. Existing studies in this track mainly focus on intra-image invariance learning. The learning typically uses rich intra-image…

计算机视觉与模式识别 · 计算机科学 2022-09-16 Jiahao Xie , Xiaohang Zhan , Ziwei Liu , Yew Soon Ong , Chen Change Loy

In computational pathology, we often face a scarcity of annotations and a large amount of unlabeled data. One method for dealing with this is semi-supervised learning which is commonly split into a self-supervised pretext task and a…

计算机视觉与模式识别 · 计算机科学 2022-03-15 Manuel Tran , Sophia J. Wagner , Melanie Boxberg , Tingying Peng

It is well known that the success of deep neural networks is greatly attributed to large-scale labeled datasets. However, it can be extremely time-consuming and laborious to collect sufficient high-quality labeled data in most practical…

计算机视觉与模式识别 · 计算机科学 2022-02-18 Yao Yao , Junyi Shen , Jin Xu , Bin Zhong , Li Xiao

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…

计算机视觉与模式识别 · 计算机科学 2021-03-31 Junnan Li , Pan Zhou , Caiming Xiong , Steven C. H. Hoi

We propose a framework using contrastive learning as a pre-training task to perform image classification in the presence of noisy labels. Recent strategies such as pseudo-labeling, sample selection with Gaussian Mixture models, weighted…

计算机视觉与模式识别 · 计算机科学 2021-04-21 Madalina Ciortan , Romain Dupuis , Thomas Peel

One paradigm for learning from few labeled examples while making best use of a large amount of unlabeled data is unsupervised pretraining followed by supervised fine-tuning. Although this paradigm uses unlabeled data in a task-agnostic way,…

机器学习 · 计算机科学 2020-10-27 Ting Chen , Simon Kornblith , Kevin Swersky , Mohammad Norouzi , Geoffrey Hinton

In unsupervised feature learning, sample specificity based methods ignore the inter-class information, which deteriorates the discriminative capability of representation models. Clustering based methods are error-prone to explore the…

计算机视觉与模式识别 · 计算机科学 2020-07-16 Yifei Zhang , Chang Liu , Yu Zhou , Wei Wang , Weiping Wang , Qixiang Ye

Recent literature in self-supervised has demonstrated significant progress in closing the gap between supervised and unsupervised methods in the image and text domains. These methods rely on domain-specific augmentations that are not…

机器学习 · 计算机科学 2021-09-02 Sajad Darabi , Shayan Fazeli , Ali Pazoki , Sriram Sankararaman , Majid Sarrafzadeh

Recently, contrastive learning has largely advanced the progress of unsupervised visual representation learning. Pre-trained on ImageNet, some self-supervised algorithms reported higher transfer learning performance compared to…

计算机视觉与模式识别 · 计算机科学 2020-11-18 Longhui Wei , Lingxi Xie , Jianzhong He , Jianlong Chang , Xiaopeng Zhang , Wengang Zhou , Houqiang Li , Qi Tian

Image clustering is an important and open-challenging task in computer vision. Although many methods have been proposed to solve the image clustering task, they only explore images and uncover clusters according to the image features, thus…

计算机视觉与模式识别 · 计算机科学 2023-04-11 Shaotian Cai , Liping Qiu , Xiaojun Chen , Qin Zhang , Longteng Chen

Self-supervised learning holds promise in leveraging large numbers of unlabeled data. However, its success heavily relies on the highly-curated dataset, e.g., ImageNet, which still needs human cleaning. Directly learning representations…

计算机视觉与模式识别 · 计算机科学 2023-02-24 Meilin Chen , Yizhou Wang , Shixiang Tang , Feng Zhu , Haiyang Yang , Lei Bai , Rui Zhao , Donglian Qi , Wanli Ouyang

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…

机器学习 · 计算机科学 2021-10-05 Ramakrishnan Sundareswaran , Jansel Herrera-Gerena , John Just , Ali Jannesari

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…

计算机视觉与模式识别 · 计算机科学 2023-03-14 Ziqi He , Mengjia Xue , Yunhao Du , Zhicheng Zhao , Fei Su

Image classification datasets exhibit a non-negligible fraction of mislabeled examples, often due to human error when one class superficially resembles another. This issue poses challenges in supervised contrastive learning (SCL), where the…

计算机视觉与模式识别 · 计算机科学 2023-11-29 Zijun Long , George Killick , Lipeng Zhuang , Richard McCreadie , Gerardo Aragon Camarasa , Paul Henderson

Current 3D semi-supervised segmentation methods face significant challenges such as limited consideration of contextual information and the inability to generate reliable pseudo-labels for effective unsupervised data use. To address these…

计算机视觉与模式识别 · 计算机科学 2023-11-22 Sanaz Karimijafarbigloo , Reza Azad , Yury Velichko , Ulas Bagci , Dorit Merhof

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…

机器学习 · 计算机科学 2024-10-10 Zi-Hao Zhou , Siyuan Fang , Zi-Jing Zhou , Tong Wei , Yuanyu Wan , Min-Ling Zhang

In the 21st-century information age, with the development of big data technology, effectively extracting valuable information from massive data has become a key issue. Traditional data mining methods are inadequate when faced with…

计算机视觉与模式识别 · 计算机科学 2024-11-28 Aoran Shen , Minghao Dai , Jiacheng Hu , Yingbin Liang , Shiru Wang , Junliang Du

Annotating large-scale point clouds is highly time-consuming and often infeasible for many complex real-world tasks. Point cloud pre-training has therefore become a promising strategy for learning discriminative representations without…

计算机视觉与模式识别 · 计算机科学 2026-03-17 Guofeng Mei , Xiaoshui Huang , Juan Liu , Jian Zhang , Qiang Wu

Existing adversarial learning approaches mostly use class labels to generate adversarial samples that lead to incorrect predictions, which are then used to augment the training of the model for improved robustness. While some recent works…

机器学习 · 计算机科学 2020-10-27 Minseon Kim , Jihoon Tack , Sung Ju Hwang