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We introduce a novel self-supervised contrastive learning method to learn representations from unlabelled videos. Existing approaches ignore the specifics of input distortions, e.g., by learning invariance to temporal transformations.…

Computer Vision and Pattern Recognition · Computer Science 2021-12-08 Simon Jenni , Hailin Jin

Contrastive learning is a representation learning method performed by contrasting a sample to other similar samples so that they are brought closely together, forming clusters in the feature space. The learning process is typically…

Machine Learning · Computer Science 2022-09-28 Valentino Vito , Lim Yohanes Stefanus

Attempt to fully discover the temporal diversity and chronological characteristics for self-supervised video representation learning, this work takes advantage of the temporal dependencies within videos and further proposes a novel…

Computer Vision and Pattern Recognition · Computer Science 2021-03-18 Yang Liu , Keze Wang , Haoyuan Lan , Liang Lin

Contrastive vision-language models such as CLIP have demonstrated strong performance across a wide range of multimodal tasks by learning from aligned image-text pairs. However, their ability to handle complex, real-world web documents…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Yiqi Lin , Alex Jinpeng Wang , Linjie Li , Zhengyuan Yang , Mike Zheng Shou

Weakly-supervised audio-visual video parsing (AVVP) seeks to detect audible, visible, and audio-visual events without temporal annotations. Previous work has emphasized refining global predictions through contrastive or collaborative…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Yaru Chen , Ruohao Guo , Liting Gao , Yang Xiang , Qingyu Luo , Zhenbo Li , Wenwu Wang

In this paper, we introduce audio-visual class-incremental learning, a class-incremental learning scenario for audio-visual video recognition. We demonstrate that joint audio-visual modeling can improve class-incremental learning, but…

Computer Vision and Pattern Recognition · Computer Science 2023-10-17 Weiguo Pian , Shentong Mo , Yunhui Guo , Yapeng Tian

Labeling data is often very time consuming and expensive, leaving us with a majority of unlabeled data. Self-supervised representation learning methods such as SimCLR (Chen et al., 2020) or BYOL (Grill et al., 2020) have been very…

Machine Learning · Computer Science 2025-04-24 Zhaohan Daniel Guo , Bernardo Avila Pires , Khimya Khetarpal , Dale Schuurmans , Bo Dai

In this paper we propose a strategy for semi-supervised image classification that leverages unsupervised representation learning and co-training. The strategy, that is called CURL from Co-trained Unsupervised Representation Learning,…

Machine Learning · Computer Science 2015-09-14 Simone Bianco , Gianluigi Ciocca , Claudio Cusano

Contrastive learning constitutes an emerging branch of self-supervised learning that leverages large amounts of unlabeled data, by learning a latent space, where pairs of different views of the same sample are associated. In this paper, we…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-12 Christos Garoufis , Athanasia Zlatintsi , Petros Maragos

Real-world federated learning faces two key challenges: limited access to labelled data and the presence of heterogeneous multi-modal inputs. This paper proposes TACTFL, a unified framework for semi-supervised multi-modal federated…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-23 Guanxiong Sun , Majid Mirmehdi , Zahraa Abdallah , Raul Santos-Rodriguez , Ian Craddock , Telmo de Menezes e Silva Filho

Unsupervised anomalous sound detection aims to detect unknown anomalous sounds by training a model using only normal audio data. Despite advancements in self-supervised methods, the issue of frequent false alarms when handling samples of…

Sound · Computer Science 2025-09-19 Shun Huang , Zhihua Fang , Liang He

In this work, we aim to consider the application of contrastive learning in the scenario of the recommendation system adequately, making it more suitable for recommendation task. We propose a learning paradigm called supervised contrastive…

Information Retrieval · Computer Science 2022-04-20 Chun Yang

We present Masked Audio-Video Learners (MAViL) to train audio-visual representations. Our approach learns with three complementary forms of self-supervision: (1) reconstruction of masked audio and video input data, (2) intra- and…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Po-Yao Huang , Vasu Sharma , Hu Xu , Chaitanya Ryali , Haoqi Fan , Yanghao Li , Shang-Wen Li , Gargi Ghosh , Jitendra Malik , Christoph Feichtenhofer

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…

Computer Vision and Pattern Recognition · Computer Science 2022-11-17 Yejia Zhang , Xinrong Hu , Nishchal Sapkota , Yiyu Shi , Danny Z. Chen

Contrastive learning has achieved remarkable success in representation learning via self-supervision in unsupervised settings. However, effectively adapting contrastive learning to supervised learning tasks remains as a challenge in…

Computation and Language · Computer Science 2022-01-24 Qianben Chen , Richong Zhang , Yaowei Zheng , Yongyi Mao

With large-scale well-labeled datasets, deep learning has shown significant success in medical image segmentation. However, it is challenging to acquire abundant annotations in clinical practice due to extensive expertise requirements and…

Image and Video Processing · Electrical Eng. & Systems 2022-10-20 Ziyuan Zhao , Jinxuan Hu , Zeng Zeng , Xulei Yang , Peisheng Qian , Bharadwaj Veeravalli , Cuntai Guan

Contrastive self-supervised learning (CSL) for speaker verification (SV) has drawn increasing interest recently due to its ability to exploit unlabeled data. Performing data augmentation on raw waveforms, such as adding noise or…

Audio and Speech Processing · Electrical Eng. & Systems 2024-03-12 Chong-Xin Gan , Man-Wai Mak , Weiwei Lin , Jen-Tzung Chien

Self supervised representation learning has recently attracted a lot of research interest for both the audio and visual modalities. However, most works typically focus on a particular modality or feature alone and there has been very…

Audio and Speech Processing · Electrical Eng. & Systems 2020-02-21 Abhinav Shukla , Konstantinos Vougioukas , Pingchuan Ma , Stavros Petridis , Maja Pantic

Machine unlearning offers effective solutions for revoking the influence of specific training data on pre-trained model parameters. While existing approaches address unlearning for classification and generative models, they overlook an…

Machine Learning · Computer Science 2025-08-19 Yihan Wang , Yiwei Lu , Guojun Zhang , Franziska Boenisch , Adam Dziedzic , Yaoliang Yu , Xiao-Shan Gao

Human Activity Recognition is a field of research where input data can take many forms. Each of the possible input modalities describes human behaviour in a different way, and each has its own strengths and weaknesses. We explore the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-07 Razvan Brinzea , Bulat Khaertdinov , Stylianos Asteriadis