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CLIP (Contrastive Language-Image Pre-training) uses contrastive learning from noise image-text pairs to excel at recognizing a wide array of candidates, yet its focus on broad associations hinders the precision in distinguishing subtle…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Ziyu Liu , Zeyi Sun , Yuhang Zang , Wei Li , Pan Zhang , Xiaoyi Dong , Yuanjun Xiong , Dahua Lin , Jiaqi Wang

In this paper, we introduce a novel regularization scheme on contrastive language-image pre-trained (CLIP) medical vision models. Our approach is based on the observation that on many medical imaging tasks text tokens should only describe a…

Machine Learning · Computer Science 2023-03-01 Anil Palepu , Andrew L. Beam

Domain adaptation is crucial in aerial imagery, as the visual representation of these images can significantly vary based on factors such as geographic location, time, and weather conditions. Additionally, high-resolution aerial images…

Computer Vision and Pattern Recognition · Computer Science 2024-05-31 Nanqing Liu , Xun Xu , Yongyi Su , Chengxin Liu , Peiliang Gong , Heng-Chao Li

The rapid advancement of generative models, particularly diffusion-based methods, has significantly improved the realism of synthetic images. As new generative models continuously emerge, detecting generated images remains a critical…

Image and Video Processing · Electrical Eng. & Systems 2025-12-09 Roy Betser , Omer Hofman , Roman Vainshtein , Guy Gilboa

Large-scale foundation models, such as CLIP, have demonstrated remarkable success in visual recognition tasks by embedding images in a semantically rich space. Self-supervised learning (SSL) has also shown promise in improving visual…

Computer Vision and Pattern Recognition · Computer Science 2023-08-23 Mainak Singha , Ankit Jha , Biplab Banerjee

Large-scale contrastive vision-language pre-trained models provide the zero-shot model achieving competitive performance across a range of image classification tasks without requiring training on downstream data. Recent works have confirmed…

Machine Learning · Computer Science 2024-04-02 Giung Nam , Byeongho Heo , Juho Lee

Foundation image-text models such as CLIP with zero-shot capabilities enable a wide array of applications. MobileCLIP is a recent family of image-text models at 3-15ms latency and 50-150M parameters with state-of-the-art zero-shot accuracy.…

Computer Vision and Pattern Recognition · Computer Science 2025-08-29 Fartash Faghri , Pavan Kumar Anasosalu Vasu , Cem Koc , Vaishaal Shankar , Alexander Toshev , Oncel Tuzel , Hadi Pouransari

We introduce a novel, closed-form approach for selective unlearning in multimodal models, specifically targeting pretrained models such as CLIP. Our method leverages nullspace projection to erase the target class information embedded in the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-17 Ashish Mishra , Tarun Kumar , Gyanaranjan Nayak , Arpit Shah , Suparna Bhattacharya , Martin Foltin

Multi-modal foundation models such as CLIP have showcased impressive zero-shot capabilities. However, their applicability in resource-constrained environments is limited due to their large number of parameters and high inference time. While…

Computer Vision and Pattern Recognition · Computer Science 2024-04-26 Niclas Popp , Jan Hendrik Metzen , Matthias Hein

Adversarial attacks meticulously generate minuscule, imperceptible perturbations to images to deceive neural networks. Counteracting these, adversarial purification methods seek to transform adversarial input samples into clean output…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Sitong Liu , Zhichao Lian , Shuangquan Zhang , Liang Xiao

This paper considers zero-shot Anomaly Detection (AD), performing AD without reference images of the test objects. We propose a framework called CLIP-AD to leverage the zero-shot capabilities of the large vision-language model CLIP.…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Xuhai Chen , Jiangning Zhang , Guanzhong Tian , Haoyang He , Wuhao Zhang , Yabiao Wang , Chengjie Wang , Yong Liu

This paper investigates the robustness of vision-language models against adversarial visual perturbations and introduces a novel ``double visual defense" to enhance this robustness. Unlike previous approaches that resort to lightweight…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Zeyu Wang , Cihang Xie , Brian Bartoldson , Bhavya Kailkhura

This report synthesizes eight seminal papers on the zero-shot adversarial robustness of vision-language models (VLMs) like CLIP. A central challenge in this domain is the inherent trade-off between enhancing adversarial robustness and…

Computer Vision and Pattern Recognition · Computer Science 2025-08-08 Zane Xu , Jason Sun

Contrastive Language-Image Pre-training (CLIP) models have shown promising performance on zero-shot visual recognition tasks by learning visual representations under natural language supervision. Recent studies attempt the use of CLIP to…

Computer Vision and Pattern Recognition · Computer Science 2024-02-28 Hanqiu Deng , Zhaoxiang Zhang , Jinan Bao , Xingyu Li

Pre-trained vision-language models such as contrastive language-image pre-training (CLIP) have demonstrated a remarkable generalizability, which has enabled a wide range of applications represented by zero-shot classification. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Kazuki Adachi , Shin'ya Yamaguchi , Tomoki Hamagami

Recent studies have shown that Contrastive Language-Image Pre-training (CLIP) models are threatened by targeted data poisoning and backdoor attacks due to massive training image-caption pairs crawled from the Internet. Previous defense…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Tong Zhang , Kuofeng Gao , Jiawang Bai , Leo Yu Zhang , Xin Yin , Zonghui Wang , Shouling Ji , Wenzhi Chen

Multimodal contrastive learning models (e.g., CLIP) can learn high-quality representations from large-scale image-text datasets, while they exhibit significant vulnerabilities to backdoor attacks, raising serious safety concerns. In this…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Zhifang Zhang , Shuo He , Haobo Wang , Bingquan Shen , Lei Feng

A key benefit of deep vision-language models such as CLIP is that they enable zero-shot open vocabulary classification; the user has the ability to define novel class labels via natural language prompts at inference time. However, while…

Computer Vision and Pattern Recognition · Computer Science 2024-01-05 A K Nirala , A Joshi , C Hegde , S Sarkar

Online Lifelong Learning (OLL) addresses the challenge of learning from continuous and non-stationary data streams. Existing online lifelong learning methods based on image classification models often require preset conditions such as the…

Computer Vision and Pattern Recognition · Computer Science 2024-05-27 Leyuan Wang , Liuyu Xiang , Yujie Wei , Yunlong Wang , Zhaofeng He

CLIP achieves strong zero-shot image-text retrieval by aligning global vision and text representations, yet it falls behind on fine-grained tasks even when fine-tuned on long, detailed captions. In this work, we propose $\beta$-CLIP, a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Fatimah Zohra , Chen Zhao , Hani Itani , Bernard Ghanem
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