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We present VideoCLIP, a contrastive approach to pre-train a unified model for zero-shot video and text understanding, without using any labels on downstream tasks. VideoCLIP trains a transformer for video and text by contrasting temporally…

Computer Vision and Pattern Recognition · Computer Science 2021-10-04 Hu Xu , Gargi Ghosh , Po-Yao Huang , Dmytro Okhonko , Armen Aghajanyan , Florian Metze , Luke Zettlemoyer , Christoph Feichtenhofer

The performance of vision-language models (VLMs), such as CLIP, in visual classification tasks, has been enhanced by leveraging semantic knowledge from large language models (LLMs), including GPT. Recent studies have shown that in zero-shot…

Computer Vision and Pattern Recognition · Computer Science 2024-11-12 Hankyeol Lee , Gawon Seo , Wonseok Choi , Geunyoung Jung , Kyungwoo Song , Jiyoung Jung

Large-scale contrastive vision-language pre-training has shown significant progress in visual representation learning. Unlike traditional visual systems trained by a fixed set of discrete labels, a new paradigm was introduced in…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Peng Gao , Shijie Geng , Renrui Zhang , Teli Ma , Rongyao Fang , Yongfeng Zhang , Hongsheng Li , Yu Qiao

In the field of vision-language contrastive learning, models such as CLIP capitalize on matched image-caption pairs as positive examples and leverage within-batch non-matching pairs as negatives. This approach has led to remarkable outcomes…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Maxwell Aladago , Lorenzo Torresani , Soroush Vosoughi

Contrastive vision-language models continue to be the dominant approach for image and text retrieval. Contrastive Language-Image Pre-training (CLIP) trains two neural networks in contrastive manner to align their image and text embeddings…

Computer Vision and Pattern Recognition · Computer Science 2025-11-21 Kwun Ho Ngan , Saman Sadeghi Afgeh , Joe Townsend , Artur d'Avila Garcez

Large-scale pre-trained Vision-Language Models (VLMs), such as CLIP, establish the correlation between texts and images, achieving remarkable success on various downstream tasks with fine-tuning. In existing fine-tuning methods, the…

Computer Vision and Pattern Recognition · Computer Science 2023-07-31 Yi Zhang , Ce Zhang , Yushun Tang , Zhihai He

Contrastive cross-modal models such as CLIP and CLAP aid various vision-language (VL) and audio-language (AL) tasks. However, there has been limited investigation of and improvement in their language encoder, which is the central component…

Computation and Language · Computer Science 2023-10-23 Mengjie Zhao , Junya Ono , Zhi Zhong , Chieh-Hsin Lai , Yuhta Takida , Naoki Murata , Wei-Hsiang Liao , Takashi Shibuya , Hiromi Wakaki , Yuki Mitsufuji

Recent years have witnessed a significant increase in the performance of Vision and Language tasks. Foundational Vision-Language Models (VLMs), such as CLIP, have been leveraged in multiple settings and demonstrated remarkable performance…

Computer Vision and Pattern Recognition · Computer Science 2024-03-04 Santiago Castro , Amir Ziai , Avneesh Saluja , Zhuoning Yuan , Rada Mihalcea

Current vision-language foundation models, such as CLIP, have recently shown significant improvement in performance across various downstream tasks. However, whether such foundation models significantly improve more complex fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2024-10-23 Mahmoud Ali , Di Yang , François Brémond

Recent contrastive language image pre-training has led to learning highly transferable and robust image representations. However, adapting these models to video domains with minimal supervision remains an open problem. We explore a simple…

Computer Vision and Pattern Recognition · Computer Science 2023-10-27 Kanchana Ranasinghe , Michael Ryoo

Multimodal learning from document data has achieved great success lately as it allows to pre-train semantically meaningful features as a prior into a learnable downstream task. In this paper, we approach the document classification problem…

Computer Vision and Pattern Recognition · Computer Science 2023-05-12 Souhail Bakkali , Zuheng Ming , Mickael Coustaty , Marçal Rusiñol , Oriol Ramos Terrades

This thesis explores the central question of how to leverage temporal relations among video elements to advance video understanding. Addressing the limitations of existing methods, the work presents a five-fold contribution: (1) an…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Thong Thanh Nguyen

CLIP has demonstrated exceptional image-text matching capabilities due to its training on contrastive learning tasks. Past research has suggested that whereas CLIP effectively matches text to images when the matching can be achieved just by…

Computation and Language · Computer Science 2025-09-17 Omri Suissa , Muhiim Ali , Ariana Azarbal , Hui Shen , Shekhar Pradhan

Audio-visual segmentation (AVS) aims to segment objects in videos based on audio cues. Existing AVS methods are primarily designed to enhance interaction efficiency but pay limited attention to modality representation discrepancies and…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Mingfeng Zha , Tianyu Li , Guoqing Wang , Peng Wang , Yangyang Wu , Yang Yang , Heng Tao Shen

The application of Contrastive Language-Image Pre-training (CLIP) in Weakly Supervised Semantic Segmentation (WSSS) research powerful cross-modal semantic understanding capabilities. Existing methods attempt to optimize input text prompts…

Computer Vision and Pattern Recognition · Computer Science 2024-12-30 Zhongxing Xu , Feilong Tang , Zhe Chen , Yingxue Su , Zhiyi Zhao , Ge Zhang , Jionglong Su , Zongyuan Ge

Contrastive learning has recently narrowed the gap between self-supervised and supervised methods in image and video domain. State-of-the-art video contrastive learning methods such as CVRL and $\rho$-MoCo spatiotemporally augment two clips…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 David Fan , Deyu Yang , Xinyu Li , Vimal Bhat , Rohith MV

Training models to apply common-sense linguistic knowledge and visual concepts from 2D images to 3D scene understanding is a promising direction that researchers have only recently started to explore. However, it still remains understudied…

Computer Vision and Pattern Recognition · Computer Science 2023-06-12 Alexandros Delitzas , Maria Parelli , Nikolas Hars , Georgios Vlassis , Sotirios Anagnostidis , Gregor Bachmann , Thomas Hofmann

Recent CLIP-like Vision-Language Models (VLMs), pre-trained on large amounts of image-text pairs to align both modalities with a simple contrastive objective, have paved the way to open-vocabulary semantic segmentation. Given an arbitrary…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Monika Wysoczańska , Antonin Vobecky , Amaia Cardiel , Tomasz Trzciński , Renaud Marlet , Andrei Bursuc , Oriane Siméoni

Zero-shot action recognition is challenging due to the semantic gap between seen and unseen classes. We present a novel framework that enhances CLIP with disentangled embeddings and semantic-guided interaction. A Motion Separation Module…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Yiming Wang , Frederick W. B. Li , Jingyun Wang

Human action recognition plays a critical role in healthcare and medicine, supporting applications such as patient behavior monitoring, fall detection, surgical robot supervision, and procedural skill assessment. While traditional models…

Computer Vision and Pattern Recognition · Computer Science 2025-08-01 Utkarsh Shandilya , Marsha Mariya Kappan , Sanyam Jain , Vijeta Sharma