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Existing contrastive language-image pre-training aims to learn a joint representation by matching abundant image-text pairs. However, the number of image-text pairs in medical datasets is usually orders of magnitude smaller than that in…

Computer Vision and Pattern Recognition · Computer Science 2024-01-04 Jiarun Liu , Hong-Yu Zhou , Cheng Li , Weijian Huang , Hao Yang , Yong Liang , Shanshan Wang

Multi-modal foundation models like OpenFlamingo, LLaVA, and GPT-4 are increasingly used for various real-world tasks. Prior work has shown that these models are highly vulnerable to adversarial attacks on the vision modality. These attacks…

Machine Learning · Computer Science 2024-06-06 Christian Schlarmann , Naman Deep Singh , Francesco Croce , Matthias Hein

Vision-language models like CLIP have demonstrated remarkable zero-shot capabilities in classification and retrieval. However, these models often struggle with compositional reasoning - the ability to understand the relationships between…

Machine Learning · Computer Science 2025-10-29 Amit Peleg , Naman Deep Singh , Matthias Hein

CLIP has shown a remarkable zero-shot capability on a wide range of vision tasks. Previously, CLIP is only regarded as a powerful visual encoder. However, after being pre-trained by language supervision from a large amount of image-caption…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Haoyu Song , Li Dong , Wei-Nan Zhang , Ting Liu , Furu Wei

Deep Learning (DL) is undergoing a paradigm shift with the emergence of foundation models. In this work, we focus on Contrastive Language-Image Pre-training (CLIP), a Vision-Language foundation model that achieves high accuracy across…

Computer Vision and Pattern Recognition · Computer Science 2025-07-21 Angelos Zavras , Dimitrios Michail , Begüm Demir , Ioannis Papoutsis

Contrastive Language-Image Pre-Training (CLIP) is a popular method for learning multimodal latent spaces with well-organized semantics. Despite its wide range of applications, CLIP's latent space is known to fail at handling complex…

Machine Learning · Computer Science 2026-03-17 Raphi Kang , Yue Song , Georgia Gkioxari , Pietro Perona

Recent deep learning-based methods for lossy image compression achieve competitive rate-distortion performance through extensive end-to-end training and advanced architectures. However, emerging applications increasingly prioritize semantic…

Computer Vision and Pattern Recognition · Computer Science 2025-09-09 Ruiqi Shen , Haotian Wu , Wenjing Zhang , Jiangjing Hu , Deniz Gunduz

Existing vision-text contrastive learning like CLIP aims to match the paired image and caption embeddings while pushing others apart, which improves representation transferability and supports zero-shot prediction. However, medical…

Computer Vision and Pattern Recognition · Computer Science 2022-10-20 Zifeng Wang , Zhenbang Wu , Dinesh Agarwal , Jimeng Sun

Labeling large image datasets with attributes such as facial age or object type is tedious and sometimes infeasible. Supervised machine learning methods provide a highly accurate solution, but require manual labels which are often…

Computer Vision and Pattern Recognition · Computer Science 2022-12-02 Jonathan Kahana , Niv Cohen , Yedid Hoshen

Pretrained large-scale vision-language models like CLIP have exhibited strong generalization over unseen tasks. Yet imperceptible adversarial perturbations can significantly reduce CLIP's performance on new tasks. In this work, we identify…

Computer Vision and Pattern Recognition · Computer Science 2023-04-24 Chengzhi Mao , Scott Geng , Junfeng Yang , Xin Wang , Carl Vondrick

Contrastive Language-Image Pretraining (CLIP) has demonstrated impressive zero-shot learning abilities for image understanding, yet limited effort has been made to investigate CLIP for zero-shot video recognition. We introduce Open-VCLIP, a…

Computer Vision and Pattern Recognition · Computer Science 2023-06-01 Zejia Weng , Xitong Yang , Ang Li , Zuxuan Wu , Yu-Gang Jiang

Despite significant results achieved by Contrastive Language-Image Pretraining (CLIP) in zero-shot image recognition, limited effort has been made exploring its potential for zero-shot video recognition. This paper presents Open-VCLIP++, a…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Zuxuan Wu , Zejia Weng , Wujian Peng , Xitong Yang , Ang Li , Larry S. Davis , Yu-Gang Jiang

Despite the recent success of image-text contrastive models like CLIP and SigLIP, these models often struggle with vision-centric tasks that demand high-fidelity image understanding, such as counting, depth estimation, and fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Zineng Tang , Long Lian , Seun Eisape , XuDong Wang , Roei Herzig , Adam Yala , Alane Suhr , Trevor Darrell , David M. Chan

We present Distill CLIP (DCLIP), a fine-tuned variant of the CLIP model that enhances multimodal image-text retrieval while preserving the original model's strong zero-shot classification capabilities. CLIP models are typically constrained…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Daniel Csizmadia , Andrei Codreanu , Victor Sim , Vighnesh Prabhu , Michael Lu , Kevin Zhu , Sean O'Brien , Vasu Sharma

Large pre-trained vision-language models such as CLIP provide compact and general-purpose representations of text and images that are demonstrably effective across multiple downstream zero-shot prediction tasks. However, owing to the nature…

Computer Vision and Pattern Recognition · Computer Science 2024-05-20 Sepehr Dehdashtian , Lan Wang , Vishnu Naresh Boddeti

Vision-language models (VLMs) such as CLIP have demonstrated remarkable zero-shot generalization, yet remain highly vulnerable to adversarial examples (AEs). While test-time defenses are promising, existing methods fail to provide…

Computer Vision and Pattern Recognition · Computer Science 2026-01-28 Sen Nie , Jie Zhang , Zhuo Wang , Shiguang Shan , Xilin Chen

Contrastive Language-Image Pre-trained (CLIP) models have zero-shot ability of classifying an image belonging to "[CLASS]" by using similarity between the image and the prompt sentence "a [CONTEXT] of [CLASS]". Based on exhaustive text cues…

Computer Vision and Pattern Recognition · Computer Science 2022-11-30 Xiaofeng Mao , Yuefeng Chen , Xiaojun Jia , Rong Zhang , Hui Xue , Zhao Li

Contrastive Language-Image Pre-training (CLIP) is an approach that has advanced research and applications in computer vision, fueling modern recognition systems and generative models. We believe that the main ingredient to the success of…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Hu Xu , Saining Xie , Xiaoqing Ellen Tan , Po-Yao Huang , Russell Howes , Vasu Sharma , Shang-Wen Li , Gargi Ghosh , Luke Zettlemoyer , Christoph Feichtenhofer

Multi-modal learning has become increasingly popular due to its ability to leverage information from different data sources (e.g., text and images) to improve the model performance. Recently, CLIP has emerged as an effective approach that…

Machine Learning · Computer Science 2024-07-12 Zixiang Chen , Yihe Deng , Yuanzhi Li , Quanquan Gu

Pre-trained large models for multimodal contrastive learning, such as CLIP, have been widely recognized in the industry as highly susceptible to data-poisoned backdoor attacks. This poses significant risks to downstream model training. In…

Computer Vision and Pattern Recognition · Computer Science 2024-11-18 Yuan Xun , Siyuan Liang , Xiaojun Jia , Xinwei Liu , Xiaochun Cao