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Recent advancements in reasoning capability of Multimodal Large Language Models (MLLMs) demonstrate its effectiveness in tackling complex visual tasks. However, existing MLLM-based Video Anomaly Detection (VAD) methods remain limited to…

Computer Vision and Pattern Recognition · Computer Science 2025-05-27 Chao Huang , Benfeng Wang , Jie Wen , Chengliang Liu , Wei Wang , Li Shen , Xiaochun Cao

Visual Retrieval-Augmented Generation (VRAG) enhances Vision-Language Models (VLMs) by incorporating external visual documents to address a given query. Existing VRAG frameworks usually depend on rigid, pre-defined external tools to extend…

Artificial Intelligence · Computer Science 2026-04-10 Yuqi Xiong , Chunyi Peng , Zhipeng Xu , Zhenghao Liu , Zulong Chen , Yukun Yan , Shuo Wang , Yu Gu , Ge Yu

Large Language Models (LLMs) have demonstrated great potential in complex reasoning tasks, yet they fall short when tackling more sophisticated challenges, especially when interacting with environments through generating executable actions.…

Computation and Language · Computer Science 2025-02-25 Yuqi Zhu , Shuofei Qiao , Yixin Ou , Shumin Deng , Shiwei Lyu , Yue Shen , Lei Liang , Jinjie Gu , Huajun Chen , Ningyu Zhang

Recent Video-Language Models (VLMs) achieve promising results on long-video understanding, but their performance still lags behind that achieved on tasks involving images or short videos. This has led to great interest in improving the long…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Lars Doorenbos , Federico Spurio , Juergen Gall

Learning multimodal video understanding typically relies on datasets comprising video clips paired with manually annotated captions. However, this becomes even more challenging when dealing with long-form videos, lasting from minutes to…

Computer Vision and Pattern Recognition · Computer Science 2025-03-12 Soumya Shamarao Jahagirdar , Jayasree Saha , C V Jawahar

Long video understanding is challenging due to dense visual redundancy, long-range temporal dependencies, and the tendency of chain-of-thought and retrieval-based agents to accumulate semantic drift and correlation-driven errors. We argue…

Computer Vision and Pattern Recognition · Computer Science 2026-03-06 Zheng Wang , Haoran Chen , Haoxuan Qin , Zhipeng Wei , Tianwen Qian , Cong Bai

This paper introduces a multi-agent framework for comprehensive highway scene understanding, designed around a mixture-of-experts strategy. In this framework, a large generic vision-language model (VLM), such as GPT-4o, is contextualized…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Yunxiang Yang , Ningning Xu , Jidong J. Yang

Video understanding has seen significant progress in recent years, with models' performance on perception from short clips continuing to rise. Yet, multiple recent benchmarks, such as LVBench, Neptune, and ActivityNet-RTL, show performance…

Computer Vision and Pattern Recognition · Computer Science 2025-09-10 Sachit Menon , Ahmet Iscen , Arsha Nagrani , Tobias Weyand , Carl Vondrick , Cordelia Schmid

Large Multimodal Models (LMMs) have demonstrated impressive performance in short video understanding tasks but face great challenges when applied to long video understanding. In contrast, Large Language Models (LLMs) exhibit outstanding…

Computer Vision and Pattern Recognition · Computer Science 2024-10-03 Hongchen Wei , Zhenzhong Chen

Despite the remarkable capabilities of text-to-image (T2I) generation models, real-world applications often demand fine-grained, iterative image editing that existing methods struggle to provide. Key challenges include granular instruction…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Zihan Liang , Jiahao Sun , Haoran Ma

Multi-modal large language models (MLLMs) have demonstrated considerable potential across various downstream tasks that require cross-domain knowledge. MLLMs capable of processing videos, known as Video-MLLMs, have attracted broad interest…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Jiajun Fei , Dian Li , Zhidong Deng , Zekun Wang , Gang Liu , Hui Wang

Video content comprehension is essential for various applications, ranging from video analysis to interactive systems. Despite advancements in large-scale vision-language models (VLMs), these models often struggle to capture the nuanced,…

Computer Vision and Pattern Recognition · Computer Science 2025-06-13 Shuyi Zhang , Xiaoshuai Hao , Yingbo Tang , Lingfeng Zhang , Pengwei Wang , Zhongyuan Wang , Hongxuan Ma , Shanghang Zhang

While Reinforcement Learning with Verifiable Reward (RLVR) significantly advances image reasoning in Large Vision-Language Models (LVLMs), its application to complex video reasoning remains underdeveloped. This gap stems primarily from a…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Congzhi Zhang , Zhibin Wang , Yinchao Ma , Jiawei Peng , Yihan Wang , Qiang Zhou , Jun Song , Bo Zheng

Multimodal large language models (LLMs) have made rapid progress in visual understanding, yet their extension from images to videos often reduces to a naive concatenation of frame tokens. In this work, we investigate what video finetuning…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Ruiqi Yang , Tian Yun , Zihan Wang , Ellie Pavlick

Video understanding with multimodal large language models (MLLMs) remains challenging due to the long token sequences of videos, which contain extensive temporal dependencies and redundant frames. Existing approaches typically treat MLLMs…

Computer Vision and Pattern Recognition · Computer Science 2026-03-30 Yaolun Zhang , Ruohui Wang , Jiahao Wang , Yepeng Tang , Xuanyu Zheng , Haonan Duan , Hao Lu , Hanming Deng , Lewei Lu

The rise of short-form video platforms and the emergence of multimodal large language models (MLLMs) have amplified the need for scalable, effective, zero-shot text-to-video retrieval systems. While recent advances in large-scale…

Information Retrieval · Computer Science 2026-02-24 Jiaxin Wu , Xiao-Yong Wei , Qing Li

Long video understanding remains a formidable challenge for Multimodal Large Language Models (MLLMs) due to the prohibitive computational cost of processing dense frame sequences. Prevailing solutions, which select a keyframe subset,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Shaoguang Wang , Weiyu Guo , Ziyang Chen , Xuming Hu , Hui Xiong

Large Vision-Language Models (LVLMs) have demonstrated strong reasoning capabilities in geo-localization, yet they often struggle in real-world scenarios where visual cues are sparse, long-tailed, and highly ambiguous. Previous approaches,…

Artificial Intelligence · Computer Science 2026-03-03 Furong Jia , Ling Dai , Wenjin Deng , Fan Zhang , Chen Hu , Daxin Jiang , Yu Liu

Large vision-language models (VLMs) have advanced multimodal tasks such as video question answering (QA). However, VLMs face the challenge of selecting frames effectively and efficiently, as standard uniform sampling is expensive and…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Martin Q. Ma , Willis Guo , Aditya Agrawal , Ankit Gupta , Paul Pu Liang , Ruslan Salakhutdinov , Louis-Philippe Morency

Monitoring autonomous large language model (LLM) agents for covert malicious behavior is challenging due to delayed, context-dependent, and long-horizon attack patterns. Agents may pursue hidden objectives while maintaining superficially…

Machine Learning · Computer Science 2026-05-26 Nesreen K. Ahmed , Nima Nafisi