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Recent advances in generative world models have enabled classical safe control methods, such as Hamilton-Jacobi (HJ) reachability, to generalize to complex robotic systems operating directly from high-dimensional sensor observations.…

Robotics · Computer Science 2025-09-25 Junwon Seo , Kensuke Nakamura , Andrea Bajcsy

Out-of-distribution (OOD) detection has emerged as a popular technique to enhance the reliability of machine learning models by identifying unexpected inputs from unknown classes. Recent progress in pre-trained vision-language models (VLMs)…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Yuanwei Hu , Bo Peng , Yadan Luo , Zhen Fang , Ling Chen , Jie Lu

Existing vision-language models exhibit strong generalization on a variety of visual domains and tasks. However, such models mainly perform zero-shot recognition in a closed-set manner, and thus struggle to handle open-domain visual…

Computer Vision and Pattern Recognition · Computer Science 2024-04-17 Yuhang Zang , Hanlin Goh , Josh Susskind , Chen Huang

Detecting out-of-distribution (OOD) data is crucial in real-world machine learning applications, particularly in safety-critical domains. Existing methods often leverage language information from vision-language models (VLMs) to enhance OOD…

Computer Vision and Pattern Recognition · Computer Science 2025-01-22 Shu Zou , Xinyu Tian , Qinyu Zhao , Zhaoyuan Yang , Jing Zhang

Video generation models (VGMs) have demonstrated the capability to synthesize high-quality output. It is important to understand their potential to produce unsafe content, such as violent or terrifying videos. In this work, we provide a…

Cryptography and Security · Computer Science 2024-07-18 Yan Pang , Aiping Xiong , Yang Zhang , Tianhao Wang

As LLMs become widespread across diverse applications, concerns about the security and safety of LLM interactions have intensified. Numerous guardrail models and benchmarks have been developed to ensure LLM content safety. However, existing…

Cryptography and Security · Computer Science 2026-02-13 Mintong Kang , Zhaorun Chen , Chejian Xu , Jiawei Zhang , Chengquan Guo , Minzhou Pan , Ivan Revilla , Yu Sun , Bo Li

The emergence of Large Reasoning Models (LRMs) introduces a new paradigm of explicit reasoning, enabling remarkable advances yet posing unique risks such as reasoning manipulation and information leakage. To mitigate these risks, current…

Artificial Intelligence · Computer Science 2026-02-03 Jingnan Zheng , Jingjun Xu , Yanzhen Luo , Chenhang Cui , Gelei Deng , Zhenkai Liang , Xiang Wang , An Zhang , Tat-Seng Chua

Recent text-to-image (T2I) models have exhibited remarkable performance in generating high-quality images from text descriptions. However, these models are vulnerable to misuse, particularly generating not-safe-for-work (NSFW) content, such…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Lingzhi Yuan , Xinfeng Li , Chejian Xu , Guanhong Tao , Xiaojun Jia , Yihao Huang , Wei Dong , Yang Liu , Bo Li

Out-of-distribution (OOD) detection is essential to prevent anomalous inputs from causing a model to fail during deployment. While improved OOD detection methods have emerged, they often rely on the final layer outputs and require a full…

Computer Vision and Pattern Recognition · Computer Science 2021-05-03 Ziqian Lin , Sreya Dutta Roy , Yixuan Li

Out-of-distribution (OOD) detection is committed to delineating the classification boundaries between in-distribution (ID) and OOD images. Recent advances in vision-language models (VLMs) have demonstrated remarkable OOD detection…

Computer Vision and Pattern Recognition · Computer Science 2025-11-17 Zhixia He , Chen Zhao , Minglai Shao , Xintao Wu , Xujiang Zhao , Dong Li , Qin Tian , Linlin Yu

Open-Vocabulary Object Detection (OVOD) aims to enable detectors to generalize across categories by leveraging semantic information. Although existing methods are pretrained on large vision-language datasets, their inference is still…

Artificial Intelligence · Computer Science 2026-04-21 Chujie Wang , Jianyu Lu , Zhiyuan Luo , Xi Chen , Chu He

Guard models are a critical component of LLM safety, but their sensitivity to superficial linguistic variations remains a key vulnerability. We show that even meaning-preserving paraphrases can cause large fluctuations in safety scores,…

Computation and Language · Computer Science 2025-11-17 Cristina Pinneri , Christos Louizos

Backdoor detection is currently the mainstream defense against backdoor attacks in federated learning (FL), where a small number of malicious clients can upload poisoned updates to compromise the federated global model. Existing backdoor…

Cryptography and Security · Computer Science 2026-05-07 Wenjie Li , Siying Gu , Yiming Li , Shuxin Li , Zhili Chen , Tianwei Zhang , Shu-Tao Xia

Out-of-distribution (OOD) detection remains challenging for deep learning models, particularly when test-time OOD samples differ significantly from training outliers. We propose OODD, a novel test-time OOD detection method that dynamically…

Computer Vision and Pattern Recognition · Computer Science 2025-03-14 Yifeng Yang , Lin Zhu , Zewen Sun , Hengyu Liu , Qinying Gu , Nanyang Ye

Current language model safety paradigms often fall short in emotionally charged or high-stakes settings, where refusal-only approaches may alienate users and naive compliance can amplify risk. We propose ProSocialAlign, a test-time,…

Computation and Language · Computer Science 2025-12-09 Somnath Banerjee , Sayan Layek , Sayantan Adak , Mykola Pechenizkiy , Animesh Mukherjee , Rima Hazra

Large vision-language models (LVLMs) have witnessed significant progress on visual understanding tasks. However, they often prioritize language knowledge over image information on visual reasoning tasks, incurring performance degradation.…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Jingqi Zhou , Sheng Wang , Jingwei Dong , Kai Liu , Lei Li , Jiahui Gao , Jiyue Jiang , Lingpeng Kong , Chuan Wu

This paper introduces LlavaGuard, a suite of VLM-based vision safeguards that address the critical need for reliable guardrails in the era of large-scale data and models. To this end, we establish a novel open framework, describing a…

Computer Vision and Pattern Recognition · Computer Science 2025-06-09 Lukas Helff , Felix Friedrich , Manuel Brack , Kristian Kersting , Patrick Schramowski

The safety of learning-enabled cyber-physical systems is compromised by the well-known vulnerabilities of deep neural networks to out-of-distribution (OOD) inputs. Existing literature has sought to monitor the safety of such systems by…

Machine Learning · Computer Science 2025-04-21 Vivian Lin , Ramneet Kaur , Yahan Yang , Souradeep Dutta , Yiannis Kantaros , Anirban Roy , Susmit Jha , Oleg Sokolsky , Insup Lee

Multimodal large language models (MLLMs) are widely used in vision-language reasoning tasks. However, their vulnerability to adversarial prompts remains a serious concern, as safety mechanisms often fail to prevent the generation of harmful…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Zuoou Li , Weitong Zhang , Jingyuan Wang , Shuyuan Zhang , Wenjia Bai , Bernhard Kainz , Mengyun Qiao

The expansion of Multimodal Large Language Models (MLLMs) and their integration into autonomous agentic workflows has introduced a non-stationary attack surface. Empirical observations indicate that adversaries employ progressive,…

Cryptography and Security · Computer Science 2026-05-20 Doohee You