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Vision language models (VLMs) demonstrate impressive capabilities in visual question answering and image captioning, acting as a crucial link between visual and language models. However, existing open-source VLMs heavily rely on pretrained…

Computer Vision and Pattern Recognition · Computer Science 2024-07-24 Aristeidis Panos , Rahaf Aljundi , Daniel Olmeda Reino , Richard E Turner

Machine-learning models demand periodic updates to improve their average accuracy, exploiting novel architectures and additional data. However, a newly updated model may commit mistakes the previous model did not make. Such…

Machine Learning · Computer Science 2025-05-30 Daniele Angioni , Luca Demetrio , Maura Pintor , Luca Oneto , Davide Anguita , Battista Biggio , Fabio Roli

The vulnerability of Deep Neural Networks (DNNs) to adversarial attacks poses a significant challenge to their deployment in safety-critical applications. While extensive research has addressed various attack scenarios, the no-box attack…

Machine Learning · Computer Science 2025-03-25 Jiaming Zhang , Lingyu Qiu , Qi Yi , Yige Li , Jitao Sang , Changsheng Xu , Dit-Yan Yeung

Pre-trained vision-language models (VLMs) like CLIP have demonstrated impressive zero-shot performance on a wide range of downstream computer vision tasks. However, there still exists a considerable performance gap between these models and…

Computer Vision and Pattern Recognition · Computer Science 2024-10-30 Bardia Safaei , Vishal M. Patel

Vision-Language Models (VLMs) can perform zero-shot classification but are susceptible to adversarial attacks. While robust fine-tuning improves their robustness, existing approaches align fixed text embeddings with an image embedding,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Junhao Dong , Yifei Zhang , Hao Zhu , Yew-Soon Ong , Piotr Koniusz

As a pivotal technique for improving the defense of deep models, adversarial robustness transfer via distillation has demonstrated remarkable success in conventional image classification tasks. However, this paradigm encounters critical…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Xiaowei Fu , Fuxiang Huang , Lei Zhang

Vision-language models, which integrate computer vision and natural language processing capabilities, have demonstrated significant advancements in tasks such as image captioning and visual question and answering. However, similar to…

Computer Vision and Pattern Recognition · Computer Science 2025-06-09 Ashwin Ramesh Babu , Sajad Mousavi , Vineet Gundecha , Sahand Ghorbanpour , Avisek Naug , Antonio Guillen , Ricardo Luna Gutierrez , Soumyendu Sarkar

Understanding the vulnerability of large-scale pre-trained vision-language models like CLIP against adversarial attacks is key to ensuring zero-shot generalization capacity on various downstream tasks. State-of-the-art defense mechanisms…

Computer Vision and Pattern Recognition · Computer Science 2024-05-21 Fan Yang , Mingxuan Xia , Sangzhou Xia , Chicheng Ma , Hui Hui

Decision making and learning in the presence of uncertainty has attracted significant attention in view of the increasing need to achieve robust and reliable operations. In the case where uncertainty stems from the presence of adversarial…

Machine Learning · Computer Science 2024-03-25 André Bertolace , Konstatinos Gatsis , Kostas Margellos

Vision-Language Models (VLMs) face significant safety vulnerabilities from malicious prompt attacks due to weakened alignment during visual integration. Existing defenses suffer from efficiency and robustness. To address these challenges,…

Machine Learning · Computer Science 2026-04-09 Peigui Qi , Kunsheng Tang , Yanpu Yu , Jialin Wu , Yide Song , Wenbo Zhou , Zhicong Huang , Cheng Hong , Weiming Zhang , Nenghai Yu

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

Contrastive Language-Image Pre-training (CLIP) models have demonstrated remarkable generalization capabilities across multiple challenging distribution shifts. However, there is still much to be explored in terms of their robustness to the…

Computer Vision and Pattern Recognition · Computer Science 2024-02-13 Weijie Tu , Weijian Deng , Tom Gedeon

Vision-language models (VLMs) like CLIP enable zero-shot classification by aligning images and text in a shared embedding space, offering advantages for defense applications with scarce labeled data. However, CLIP's robustness in…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Jan Erik van Woerden , Gertjan Burghouts , Lotte Nijskens , Alma M. Liezenga , Sabina van Rooij , Frank Ruis , Hugo J. Kuijf

Adversarial input attacks can cause a significant shift of CLIP embeddings. This can affect the downstream robustness of models incorporating CLIP in the pipeline, such as text-to-image generative models or large vision language models.…

Machine Learning · Computer Science 2025-10-13 Elias Abad Rocamora , Christian Schlarmann , Naman Deep Singh , Yongtao Wu , Matthias Hein , Volkan Cevher

Vision-Language Models (VLMs), such as CLIP, exhibit strong image-text comprehension abilities, facilitating advances in several downstream tasks such as zero-shot image classification, image-text retrieval, and text-to-image generation.…

Computer Vision and Pattern Recognition · Computer Science 2024-04-26 Le Zhang , Rabiul Awal , Aishwarya Agrawal

In this paper, we introduce a novel neural network training framework that increases model's adversarial robustness to adversarial attacks while maintaining high clean accuracy by combining contrastive learning (CL) with adversarial…

Machine Learning · Computer Science 2022-09-13 Adir Rahamim , Itay Naeh

Adversarial attacks constitute a notable threat to machine learning systems, given their potential to induce erroneous predictions and classifications. However, within real-world contexts, the essential specifics of the deployed model are…

Computer Vision and Pattern Recognition · Computer Science 2023-12-21 Jingwen Ye , Ruonan Yu , Songhua Liu , Xinchao Wang

The integration of visual and textual data in Vision-Language Pre-training (VLP) models is crucial for enhancing vision-language understanding. However, the adversarial robustness of these models, especially in the alignment of image-text…

Multimedia · Computer Science 2025-06-03 Youze Wang , Wenbo Hu , Yinpeng Dong , Hanwang Zhang , Hang Su , Richang Hong

Pre-training image representations from the raw text about images enables zero-shot vision transfer to downstream tasks. Through pre-training on millions of samples collected from the internet, multimodal foundation models, such as CLIP,…

Machine Learning · Computer Science 2024-03-18 Chenguang Wang , Ruoxi Jia , Xin Liu , Dawn Song

Efficient fine-tuning of vision-language models (VLMs) like CLIP for specific downstream tasks is gaining significant attention. Previous works primarily focus on prompt learning to adapt the CLIP into a variety of downstream tasks,…

Computer Vision and Pattern Recognition · Computer Science 2024-10-17 Jinlong Li , Dong Zhao , Zequn Jie , Elisa Ricci , Lin Ma , Nicu Sebe