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Despite considerable advances in deep reinforcement learning, it has been shown to be highly vulnerable to adversarial perturbations to state observations. Recent efforts that have attempted to improve adversarial robustness of…

Machine Learning · Computer Science 2023-01-11 Junlin Wu , Yevgeniy Vorobeychik

Multimodal alignment between language and vision is the fundamental topic in current vision-language model research. Contrastive Captioners (CoCa), as a representative method, integrates Contrastive Language-Image Pretraining (CLIP) and…

Computer Vision and Pattern Recognition · Computer Science 2024-01-05 Ziping Ma , Furong Xu , Jian Liu , Ming Yang , Qingpei Guo

Large pre-trained vision-language models (VLMs) offer a promising approach to leveraging human language for enhancing downstream tasks. However, VLMs such as CLIP face significant limitation: its performance is highly sensitive to prompt…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Ao Li , Zongfang Liu , Xinhua Li , Jinghui Zhang , Pengwei Wang , Hu Wang

While Multimodal Large Language Models (MLLMs) have achieved remarkable progress in open-ended visual question answering, they remain vulnerable to hallucinations. These are outputs that contradict or misrepresent input semantics, posing a…

Computer Vision and Pattern Recognition · Computer Science 2025-10-01 Jianjiang Yang , Yanshu li , Ziyan Huang

Adversarial behavior plays a central role in aligning large language models with human values. However, existing alignment methods largely rely on static adversarial settings, which fundamentally limit robustness, particularly in multimodal…

Cryptography and Security · Computer Science 2026-03-03 Guoxin Shi , Haoyu Wang , Zaihui Yang , Yuxing Wang , Yongzhe Chang

Large Language Models (LLMs) are increasingly vulnerable to adversarial prompts that exploit semantic ambiguities to bypass safety mechanisms, resulting in harmful or inappropriate outputs. Such attacks, including jailbreaking and prompt…

Cryptography and Security · Computer Science 2026-05-28 Xiang Fang , Wanlong Fang

We investigate the efficacy of visual prompting to adapt large-scale models in vision. Following the recent approach from prompt tuning and adversarial reprogramming, we learn a single image perturbation such that a frozen model prompted…

Computer Vision and Pattern Recognition · Computer Science 2022-06-06 Hyojin Bahng , Ali Jahanian , Swami Sankaranarayanan , Phillip Isola

The choice of input text prompt plays a critical role in the performance of Vision-Language Pretrained (VLP) models such as CLIP. We present APoLLo, a unified multi-modal approach that combines Adapter and Prompt learning for…

Machine Learning · Computer Science 2023-12-05 Sanjoy Chowdhury , Sayan Nag , Dinesh Manocha

Existing prompt learning methods, which are built upon CLIP models, leverage textual tokens as anchors to guide the learnable soft tokens. This guidance improves CLIP generalizations. However, these anchors-static in both value and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-27 Zheng Li , Yibing Song , Xin Zhang , Lei Luo , Xiang Li , Jian Yang

Over the past decade, there has been extensive research aimed at enhancing the robustness of neural networks, yet this problem remains vastly unsolved. Here, one major impediment has been the overestimation of the robustness of new defense…

Artificial Intelligence · Computer Science 2023-10-31 Leo Schwinn , David Dobre , Stephan Günnemann , Gauthier Gidel

As powerful pre-trained vision-language models (VLMs) like CLIP gain prominence, numerous studies have attempted to combine VLMs for downstream tasks. Among these, prompt learning has been validated as an effective method for adapting to…

Computer Vision and Pattern Recognition · Computer Science 2024-09-19 Yu Du , Tong Niu , Rong Zhao

Vision-language pretraining (VLP) with transformers has demonstrated exceptional performance across numerous multimodal tasks. However, the adversarial robustness of these models has not been thoroughly investigated. Existing multimodal…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Jiwei Guan , Tianyu Ding , Longbing Cao , Lei Pan , Chen Wang , Xi Zheng

Vision-language models (VLMs) have exhibited remarkable generalization capabilities, and prompt learning for VLMs has attracted great attention for the ability to adapt pre-trained VLMs to specific downstream tasks. However, existing…

Machine Learning · Computer Science 2025-01-15 Song-Lin Lv , Yu-Yang Chen , Zhi Zhou , Ming Yang , Lan-Zhe Guo

Deep Neural Networks are vulnerable to adversarial examples, i.e., carefully crafted input samples that can cause models to make incorrect predictions with high confidence. To mitigate these vulnerabilities, adversarial training and…

Computer Vision and Pattern Recognition · Computer Science 2025-04-21 Francesco Villani , Igor Maljkovic , Dario Lazzaro , Angelo Sotgiu , Antonio Emanuele Cinà , Fabio Roli

Vision-language models (VLMs) such as CLIP demonstrate strong generalization in zero-shot classification but remain highly vulnerable to adversarial perturbations. Existing methods primarily focus on adversarial fine-tuning or prompt…

Computer Vision and Pattern Recognition · Computer Science 2026-03-02 Xingyu Zhu , Beier Zhu , Shuo Wang , Kesen Zhao , Hanwang Zhang

Vision-Language Models (VLMs) rely heavily on pretrained vision encoders to support downstream tasks such as image captioning, visual question answering, and zero-shot classification. Despite their strong performance, these encoders remain…

Computer Vision and Pattern Recognition · Computer Science 2026-04-08 Md Zarif Hossain , Ahmed Imteaj

Vision-Language-Action models (VLAs) have recently demonstrated remarkable progress in embodied environments, enabling robots to perceive, reason, and act through unified multimodal understanding. Despite their impressive capabilities, the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-12 Yuping Yan , Yuhan Xie , Yixin Zhang , Lingjuan Lyu , Handing Wang , Yaochu Jin

Robustness of huge Transformer-based models for natural language processing is an important issue due to their capabilities and wide adoption. One way to understand and improve robustness of these models is an exploration of an adversarial…

While existing text-to-speech (TTS) models exhibit high expressiveness, fine-grained control over composite instructions remains challenging due to the structural mismatch between discrete textual intents and continuous acoustic…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Bin Kang , Shaoguo Wen , Yang Fan , Shunlong Wu , Junjie Wang , Yulin Li , Junzhi Zhao , Junle Wang , Zhuotao Tian

Deep neural networks are found to be vulnerable to adversarial perturbations. The prompt-based defense has been increasingly studied due to its high efficiency. However, existing prompt-based defenses mainly exploited mixed prompt patterns,…

Computer Vision and Pattern Recognition · Computer Science 2025-06-02 Yibo Xu , Dawei Zhou , Decheng Liu , Nannan Wang