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Self-supervised skeleton-based action recognition with contrastive learning has attracted much attention. Recent literature shows that data augmentation and large sets of contrastive pairs are crucial in learning such representations. In…

Computer Vision and Pattern Recognition · Computer Science 2022-07-08 Zhan Chen , Hong Liu , Tianyu Guo , Zhengyan Chen , Pinhao Song , Hao Tang

Contrastive Language-Image Pre-training (CLIP) delivers strong cross modal generalization by aligning images and texts in a shared embedding space, yet it persistently fails at compositional reasoning over objects, attributes, and relations…

Machine Learning · Computer Science 2025-10-31 Ziliang Chen , Tianang Xiao , Jusheng Zhang , Yongsen Zheng , Xipeng Chen

Given a similarity metric, contrastive methods learn a representation in which examples that are similar are pushed together and examples that are dissimilar are pulled apart. Contrastive learning techniques have been utilized extensively…

Machine Learning · Computer Science 2023-07-07 Emily Mu , John Guttag , Maggie Makar

Self-supervised contrastive learning models, such as CLIP, have set new benchmarks for vision-language models in many downstream tasks. However, their dependency on rigid one-to-one mappings overlooks the complex and often multifaceted…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Yiming Zhang , Zhuokai Zhao , Zhaorun Chen , Zhili Feng , Zenghui Ding , Yining Sun

Semantic overlap among land-cover categories, highly imbalanced label distributions, and complex inter-class co-occurrence patterns constitute significant challenges for multi-label remote-sensing image retrieval. In this article,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Amna Amir , Erchan Aptoula

Advanced self-supervised visual representation learning methods rely on the instance discrimination (ID) pretext task. We point out that the ID task has an implicit semantic consistency (SC) assumption, which may not hold in unconstrained…

Computer Vision and Pattern Recognition · Computer Science 2021-08-19 Yucheng Zhao , Guangting Wang , Chong Luo , Wenjun Zeng , Zheng-Jun Zha

The surge in multimodal AI's success has sparked concerns over data privacy in vision-and-language tasks. While CLIP has revolutionized multimodal learning through joint training on images and text, its potential to unintentionally disclose…

Machine Learning · Computer Science 2024-03-04 Alyssa Huang , Peihan Liu , Ryumei Nakada , Linjun Zhang , Wanrong Zhang

Multi-modal contrastive representation (MCR) of more than three modalities is critical in multi-modal learning. Although recent methods showcase impressive achievements, the high dependence on large-scale, high-quality paired data and the…

Computer Vision and Pattern Recognition · Computer Science 2023-10-16 Zehan Wang , Ziang Zhang , Luping Liu , Yang Zhao , Haifeng Huang , Tao Jin , Zhou Zhao

There are a thousand ways to caption an image. Contrastive Language Pretraining (CLIP) on the other hand, works by mapping an image and its caption to a single vector -- limiting how well CLIP-like models can represent the diverse ways to…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Samuel Lavoie , Polina Kirichenko , Mark Ibrahim , Mahmoud Assran , Andrew Gordon Wilson , Aaron Courville , Nicolas Ballas

As medical diagnoses increasingly leverage multimodal data, machine learning models are expected to effectively fuse heterogeneous information while remaining robust to missing modalities. In this work, we propose a novel multimodal…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Yi Gu , Kuniaki Saito , Jiaxin Ma

Recently, contrastive learning has been shown to be effective in improving pre-trained language models (PLM) to derive high-quality sentence representations. It aims to pull close positive examples to enhance the alignment while push apart…

Computation and Language · Computer Science 2022-05-03 Kun Zhou , Beichen Zhang , Wayne Xin Zhao , Ji-Rong Wen

This paper explores useful modifications of the recent development in contrastive learning via novel probabilistic modeling. We derive a particular form of contrastive loss named Joint Contrastive Learning (JCL). JCL implicitly involves the…

Computer Vision and Pattern Recognition · Computer Science 2020-10-13 Qi Cai , Yu Wang , Yingwei Pan , Ting Yao , Tao Mei

Spatial understanding remains a key challenge in vision-language models. Yet it is still unclear whether such understanding is truly acquired, and if so, through what mechanisms. We present a controllable 1D image-text testbed to probe how…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Takaki Yamamoto , Chihiro Noguchi , Toshihiro Tanizawa

Estimating correspondences between pairs of non-rigid deformable 3D shapes remains a significant challenge in computer vision and graphics. While deep functional map methods have become the go-to solution for addressing this problem, they…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Feifan Luo , Hongyang Chen

Contrastive Language-Image Pre-training (CLIP)~\citep{radford2021learning} has emerged as a pivotal model in computer vision and multimodal learning, achieving state-of-the-art performance at aligning visual and textual representations…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Shaoan Xie , Lingjing Kong , Yujia Zheng , Yu Yao , Zeyu Tang , Eric P. Xing , Guangyi Chen , Kun Zhang

Disease diagnosis from medical images via supervised learning is usually dependent on tedious, error-prone, and costly image labeling by medical experts. Alternatively, semi-supervised learning and self-supervised learning offer…

Computer Vision and Pattern Recognition · Computer Science 2023-06-14 Attiano Purpura-Pontoniere , Demetri Terzopoulos , Adam Wang , Abdullah-Al-Zubaer Imran

Previous Online Knowledge Distillation (OKD) often carries out mutually exchanging probability distributions, but neglects the useful representational knowledge. We therefore propose Multi-view Contrastive Learning (MCL) for OKD to…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Chuanguang Yang , Zhulin An , Yongjun Xu

Cross-modal retrieval is the task of retrieving samples of a given modality by using queries of a different one. Due to the wide range of practical applications, the problem has been mainly focused on the vision and language case, e.g. text…

Computer Vision and Pattern Recognition · Computer Science 2024-01-30 Jorge Sánchez , Rodrigo Laguna

Multimodal contrastive learning (MCL) has shown remarkable advances in zero-shot classification by learning from millions of image-caption pairs crawled from the Internet. However, this reliance poses privacy risks, as hackers may…

Multimedia · Computer Science 2024-07-29 Xinwei Liu , Xiaojun Jia , Yuan Xun , Siyuan Liang , Xiaochun Cao

Learning semantic-rich representations from raw unlabeled time series data is critical for downstream tasks such as classification and forecasting. Contrastive learning has recently shown its promising representation learning capability in…

Machine Learning · Computer Science 2023-03-31 Qianwen Meng , Hangwei Qian , Yong Liu , Lizhen Cui , Yonghui Xu , Zhiqi Shen