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Owing to powerful natural language processing and generative capabilities, large language model (LLM) agents have emerged as a promising solution for enhancing recommendation systems via user simulation. However, in the realm of video…

Multimedia · Computer Science 2025-07-04 Siran Chen , Boyu Chen , Chenyun Yu , Yuxiao Luo , Ouyang Yi , Lei Cheng , Chengxiang Zhuo , Zang Li , Yali Wang

Long-form video understanding remains a fundamental challenge for current Video Large Language Models. Most existing models rely on static reasoning over uniformly sampled frames, which weakens temporal localization and leads to substantial…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Chenglin Li , Qianglong Chen , Feng Han , Yikun Wang , Xingxi Yin , Yan Gong , Ruilin Li , Yin Zhang , Jiaqi Wang

Temporal sentence grounding (TSG) aims to locate a specific moment from an untrimmed video with a given natural language query. Recently, weakly supervised methods still have a large performance gap compared to fully supervised ones, while…

Computer Vision and Pattern Recognition · Computer Science 2023-08-09 Hanjun Li , Xiujun Shu , Sunan He , Ruizhi Qiao , Wei Wen , Taian Guo , Bei Gan , Xing Sun

Identifying key temporal intervals within long videos, known as temporal grounding (TG), is important to video understanding and reasoning tasks. In this paper, we introduce a new form of the temporal grounding problem,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Xiangrui Liu , Minghao Qin , Yan Shu , Zhengyang Liang , Yang Tian , Chen Jason Zhang , Bo Zhao , Zheng Liu

Natural language can offer a concise and human-interpretable means of specifying reinforcement learning (RL) tasks. The ability to extract rewards from a language instruction can enable the development of robotic systems that can learn from…

Machine Learning · Computer Science 2025-12-15 Alexey Zakharov , Shimon Whiteson

Video large language models (Video-LLMs) can temporally ground language queries and retrieve video moments. Yet, such temporal comprehension capabilities are neither well-studied nor understood. So we conduct a study on prediction…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Minjoon Jung , Junbin Xiao , Byoung-Tak Zhang , Angela Yao

Temporal search aims to identify a minimal set of relevant frames from tens of thousands based on a given query, serving as a foundation for accurate long-form video understanding. Existing works attempt to progressively narrow the search…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Junwen Pan , Qizhe Zhang , Rui Zhang , Ming Lu , Xin Wan , Yuan Zhang , Chang Liu , Qi She

Video Large Language Models (Video LLMs) have achieved impressive performance on video-and-language tasks, such as video question answering. However, most existing Video LLMs neglect temporal information in video data, leading to struggles…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Zi-Yuan Hu , Yiwu Zhong , Shijia Huang , Michael R. Lyu , Liwei Wang

Reinforcement learning (RL) has recently shown strong potential in improving the reasoning capabilities of large language models and is now being actively extended to vision-language models (VLMs). However, existing RL applications in VLMs…

Machine Learning · Computer Science 2025-04-07 Yan Ma , Steffi Chern , Xuyang Shen , Yiran Zhong , Pengfei Liu

Large language models (LLMs) have demonstrated exceptional capabilities in text understanding, which has paved the way for their expansion into video LLMs (Vid-LLMs) to analyze video data. However, current Vid-LLMs struggle to…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Ming Nie , Dan Ding , Chunwei Wang , Yuanfan Guo , Jianhua Han , Hang Xu , Li Zhang

Cross-modal (e.g. image-text, video-text) retrieval is an important task in information retrieval and multimodal vision-language understanding field. Temporal understanding makes video-text retrieval more challenging than image-text…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Yang Du , Yuqi Liu , Qin Jin

Video Anomaly Detection (VAD) aims to identify anomalous events in videos and accurately determine their time intervals. Current VAD methods mainly fall into two categories: traditional DNN-based approaches that focus on temporal…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Shibo Gao , Peipei Yang , Yangyang Liu , Yi Chen , Han Zhu , Xuyao Zhang , Linlin Huang

Partially Relevant Video Retrieval~(PRVR) aims to retrieve a video where a specific segment is relevant to a given text query. Typical training processes of PRVR assume a one-to-one relationship where each text query is relevant to only one…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 CH Cho , WJ Moon , W Jun , MS Jung , JP Heo

Spatio-Temporal Video Grounding (STVG) aims to localize target objects in videos based on natural language descriptions. Despite recent advances in Multimodal Large Language Models, a significant gap remains between current models and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Hong Gao , Jingyu Wu , Xiangkai Xu , Kangni Xie , Yunchen Zhang , Bin Zhong , Xurui Gao , Min-Ling Zhang

Reinforcement learning-based retrieval-augmented generation (RAG) methods enhance the reasoning abilities of large language models (LLMs). However, most rely only on final-answer rewards, overlooking intermediate reasoning quality. This…

Computation and Language · Computer Science 2025-08-07 Jie He , Victor Gutiérrez-Basulto , Jeff Z. Pan

Prevailing joint prediction transformers for Video Highlight Detection and Moment Retrieval (HD/MR) exhibit deficiencies in handling cross-task dynamics, achieving robust video-text alignment, and utilizing effective attention mechanisms,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Dhiman Paul , Md Rizwan Parvez , Nabeel Mohammed , Shafin Rahman

Video-language alignment is a crucial multi-modal task that benefits various downstream applications, e.g., video-text retrieval and video question answering. Existing methods either utilize multi-modal information in video-text pairs or…

Computer Vision and Pattern Recognition · Computer Science 2024-07-25 Shi-Xue Zhang , Hongfa Wang , Xiaobin Zhu , Weibo Gu , Tianjin Zhang , Chun Yang , Wei Liu , Xu-Cheng Yin

Long-context reasoning has significantly empowered large language models (LLMs) to tackle complex tasks, yet it introduces severe efficiency bottlenecks due to the computational complexity. Existing efficient approaches often rely on…

Computation and Language · Computer Science 2026-02-03 Yibo Wang , Yongcheng Jing , Shunyu Liu , Hao Guan , Rong-cheng Tu , Chengyu Wang , Jun Huang , Dacheng Tao

There has been growing sentiment recently that modern large multimodal models (LMMs) have addressed most of the key challenges related to short video comprehension. As a result, both academia and industry are gradually shifting their…

Computer Vision and Pattern Recognition · Computer Science 2024-10-04 Jianrui Zhang , Mu Cai , Yong Jae Lee

Recent video reasoning models have shown strong results on temporal and multimodal understanding, yet they depend on large-scale supervised data and multi-stage training pipelines, making them costly to train and difficult to adapt to new…