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Video Multimodal Large Language Models (V-MLLMs) have shown impressive capabilities in temporal reasoning and cross-modal understanding, yet their vulnerability to adversarial attacks remains underexplored due to unique challenges: complex…

Computer Vision and Pattern Recognition · Computer Science 2025-07-02 Jiaming Zhang , Rui Hu , Qing Guo , Wei Yang Bryan Lim

Vision-language pre-training (VLP) models are vulnerable to adversarial examples, particularly in black-box scenarios. Existing multimodal attacks often suffer from limited perturbation diversity and unstable multi-stage pipelines. To…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Wutao Chen , Huaqin Zou , Chen Wan , Lifeng Huang

In the past few years, the emergence of pre-training models has brought uni-modal fields such as computer vision (CV) and natural language processing (NLP) to a new era. Substantial works have shown they are beneficial for downstream…

Computer Vision and Pattern Recognition · Computer Science 2024-04-19 Feilong Chen , Duzhen Zhang , Minglun Han , Xiuyi Chen , Jing Shi , Shuang Xu , Bo Xu

Vision-Language Pretraining (VLP) has shown impressive results on diverse downstream tasks by offline training on large-scale datasets. Regarding the growing nature of real-world data, such an offline training paradigm on ever-expanding…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Hongguang Zhu , Yunchao Wei , Xiaodan Liang , Chunjie Zhang , Yao Zhao

Neural networks are known to be vulnerable to adversarial examples, inputs that have been intentionally perturbed to remain visually similar to the source input, but cause a misclassification. It was recently shown that given a dataset and…

Cryptography and Security · Computer Science 2018-01-08 Jamie Hayes , George Danezis

Multimodal contrastive learning aims to train a general-purpose feature extractor, such as CLIP, on vast amounts of raw, unlabeled paired image-text data. This can greatly benefit various complex downstream tasks, including cross-modal…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Ziqi Zhou , Shengshan Hu , Minghui Li , Hangtao Zhang , Yechao Zhang , Hai Jin

In this work, we leverage visual prompting (VP) to improve adversarial robustness of a fixed, pre-trained model at testing time. Compared to conventional adversarial defenses, VP allows us to design universal (i.e., data-agnostic) input…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Aochuan Chen , Peter Lorenz , Yuguang Yao , Pin-Yu Chen , Sijia Liu

Large pre-trained Vision Language Models (VLMs) demonstrate excellent generalization capabilities but remain highly susceptible to adversarial examples, posing potential security risks. To improve the robustness of VLMs against adversarial…

Computer Vision and Pattern Recognition · Computer Science 2025-12-19 Shiji Zhao , Qihui Zhu , Shukun Xiong , Shouwei Ruan , Maoxun Yuan , Jialing Tao , Jiexi Liu , Ranjie Duan , Jie Zhang , Jie Zhang , Xingxing Wei

With the rapid advancement and widespread application of vision-language pre-training (VLP) models, their vulnerability to adversarial attacks has become a critical concern. In general, the adversarial examples can typically be designed to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Yuanbo Li , Tianyang Xu , Cong Hu , Tao Zhou , Xiao-Jun Wu , Josef Kittler

Large pre-trained Vision-Language Models (VLMs) like CLIP, despite having remarkable generalization ability, are highly vulnerable to adversarial examples. This work studies the adversarial robustness of VLMs from the novel perspective of…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Lin Li , Haoyan Guan , Jianing Qiu , Michael Spratling

Adversarial examples are perturbed inputs which can cause a serious threat for machine learning models. Finding these perturbations is such a hard task that we can only use the iterative methods to traverse. For computational efficiency,…

Computer Vision and Pattern Recognition · Computer Science 2020-06-11 Xiaofeng Mao , Yuefeng Chen , Yuhong Li , Yuan He , Hui Xue

In this paper, we propose novel generative models for creating adversarial examples, slightly perturbed images resembling natural images but maliciously crafted to fool pre-trained models. We present trainable deep neural networks for…

Computer Vision and Pattern Recognition · Computer Science 2018-07-09 Omid Poursaeed , Isay Katsman , Bicheng Gao , Serge Belongie

Visual Question Answering (VQA) is a fundamental task in computer vision and natural language process fields. Although the ``pre-training & finetuning'' learning paradigm significantly improves the VQA performance, the adversarial…

Computer Vision and Pattern Recognition · Computer Science 2024-02-20 Ziyi Yin , Muchao Ye , Tianrong Zhang , Jiaqi Wang , Han Liu , Jinghui Chen , Ting Wang , Fenglong Ma

Infrared vision-language models (IR-VLMs) have emerged as a promising paradigm for multimodal perception in low-visibility environments, yet their robustness to adversarial attacks remains largely unexplored. Existing adversarial patch…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Chengyin Hu , Yuxian Dong , Yikun Guo , Xiang Chen , Junqi Wu , Jiahuan Long , Yiwei Wei , Tingsong Jiang , Wen Yao

Pretrained vision-language models (VLMs) like CLIP exhibit exceptional generalization across diverse downstream tasks. While recent studies reveal their vulnerability to adversarial attacks, research to date has primarily focused on…

Computer Vision and Pattern Recognition · Computer Science 2024-11-13 Wanqi Zhou , Shuanghao Bai , Danilo P. Mandic , Qibin Zhao , Badong Chen

Vision-and-Language (V+L) pre-training models have achieved tremendous success in recent years on various multi-modal benchmarks. However, the majority of existing models require pre-training on a large set of parallel image-text data,…

Computer Vision and Pattern Recognition · Computer Science 2022-03-02 Mingyang Zhou , Licheng Yu , Amanpreet Singh , Mengjiao Wang , Zhou Yu , Ning Zhang

Universal adversarial perturbations (UAPs) have garnered significant attention due to their ability to undermine deep neural networks across multiple inputs using a single noise pattern. Evolutionary algorithms offer a promising approach to…

Machine Learning · Computer Science 2026-01-21 Shiqi Wang , Mahdi Khosravy , Neeraj Gupta , Olaf Witkowski

Deep neural network image classifiers are reported to be susceptible to adversarial evasion attacks, which use carefully crafted images created to mislead a classifier. Recently, various kinds of adversarial attack methods have been…

Machine Learning · Computer Science 2019-10-04 He Zhao , Trung Le , Paul Montague , Olivier De Vel , Tamas Abraham , Dinh Phung

Self-supervised pre-training has drawn increasing attention in recent years due to its superior performance on numerous downstream tasks after fine-tuning. However, it is well-known that deep learning models lack the robustness to…

Computer Vision and Pattern Recognition · Computer Science 2022-10-17 Yuanhao Ban , Yinpeng Dong

Vision-language pre-training (VLP) models exhibit remarkable capabilities in comprehending both images and text, yet they remain susceptible to multimodal adversarial examples (AEs). Strengthening attacks and uncovering vulnerabilities,…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Sensen Gao , Xiaojun Jia , Xuhong Ren , Ivor Tsang , Qing Guo