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Video temporal understanding is crucial for multimodal large language models (MLLMs) to reason over events in videos. Despite recent advances in general video understanding, current MLLMs still struggle with fine-grained temporal reasoning.…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Fuwen Luo , Shengfeng Lou , Chi Chen , Ziyue Wang , Chenliang Li , Weizhou Shen , Jiyue Guo , Peng Li , Ming Yan , Ji Zhang , Fei Huang , Yang Liu

While Video Large Language Models (Video-LLMs) have shown significant potential in multimodal understanding and reasoning tasks, how to efficiently select the most informative frames from videos remains a critical challenge. Existing…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Shihao Wang , Guo Chen , De-an Huang , Zhiqi Li , Minghan Li , Guilin Liu , Jose M. Alvarez , Lei Zhang , Zhiding Yu

Video Temporal Grounding (VTG) aims to identify visual frames in a video clip that match text queries. Recent studies in VTG employ cross-attention to correlate visual frames and text queries as individual token sequences. However, these…

Computer Vision and Pattern Recognition · Computer Science 2024-10-18 Jongbhin Woo , Hyeonggon Ryu , Youngjoon Jang , Jae Won Cho , Joon Son Chung

Temporal Video Grounding (TVG) aims to localize video segments corresponding to a given textual query, which often describes human actions. However, we observe that current methods, usually optimizing for high temporal…

Artificial Intelligence · Computer Science 2026-02-16 Zhaoyu Chen , Hongnan Lin , Yongwei Nie , Fei Ma , Xuemiao Xu , Fei Yu , Chengjiang Long

Video Temporal Grounding (VTG) aims to localize temporal segments in long, untrimmed videos that align with a given natural language query. This task typically comprises two subtasks: Moment Retrieval (MR) and Highlight Detection (HD).…

Computer Vision and Pattern Recognition · Computer Science 2025-10-24 Minseok Kang , Minhyeok Lee , Minjung Kim , Donghyeong Kim , Sangyoun Lee

Temporal sentence grounding in videos (TSGV), \aka natural language video localization (NLVL) or video moment retrieval (VMR), aims to retrieve a temporal moment that semantically corresponds to a language query from an untrimmed video.…

Computer Vision and Pattern Recognition · Computer Science 2023-04-26 Hao Zhang , Aixin Sun , Wei Jing , Joey Tianyi Zhou

Video temporal grounding (VTG) aims to locate specific temporal segments from an untrimmed video based on a linguistic query. Most existing VTG models are trained on extensive annotated video-text pairs, a process that not only introduces…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Yifang Xu , Yunzhuo Sun , Zien Xie , Benxiang Zhai , Sidan Du

Video Temporal Grounding (VTG), which aims to localize video clips corresponding to natural language queries, is a fundamental yet challenging task in video understanding. Existing Transformer-based methods often suffer from redundant…

Computer Vision and Pattern Recognition · Computer Science 2026-01-28 Zhiyi Zhu , Xiaoyu Wu , Zihao Liu , Linlin Yang

Video temporal grounding aims to localize relevant temporal boundaries in a video given a textual prompt. Recent work has focused on enabling Video LLMs to perform video temporal grounding via next-token prediction of temporal timestamps.…

Computer Vision and Pattern Recognition · Computer Science 2025-03-06 Xizi Wang , Feng Cheng , Ziyang Wang , Huiyu Wang , Md Mohaiminul Islam , Lorenzo Torresani , Mohit Bansal , Gedas Bertasius , David Crandall

Video Temporal Grounding (VTG) aims to localize the video segment that corresponds to a natural language query, which requires a comprehensive understanding of complex temporal dynamics. Existing Vision-LMMs typically perceive temporal…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Chaohong Guo , Yihan He , Yongwei Nie , Fei Ma , Xuemiao Xu , Chengjiang Long

Text-guided Video Temporal Grounding (VTG) aims to localize relevant segments in untrimmed videos based on textual descriptions, encompassing two subtasks: Moment Retrieval (MR) and Highlight Detection (HD). Although previous typical…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 Zhuo Cao , Bingqing Zhang , Heming Du , Xin Yu , Xue Li , Sen Wang

Video understanding is inherently intention-driven-humans naturally focus on relevant frames based on their goals. Recent advancements in multimodal large language models (MLLMs) have enabled flexible query-driven reasoning; however,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-22 Ziqiang Xu , Qi Dai , Tian Xie , Yifan Yang , Kai Qiu , DongDong Chen , Zuxuan Wu , Chong Luo

Understanding real-world videos with complex semantics and long temporal dependencies remains a fundamental challenge in computer vision. Recent progress in multimodal large language models (MLLMs) has demonstrated strong capabilities in…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Hongyu Li , Songhao Han , Yue Liao , Junfeng Luo , Jialin Gao , Shuicheng Yan , Si Liu

Video Temporal Grounding (VTG) is a crucial capability for video understanding models and plays a vital role in downstream tasks such as video browsing and editing. To effectively handle various tasks simultaneously and enable zero-shot…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Yongxin Guo , Jingyu Liu , Mingda Li , Qingbin Liu , Xi Chen , Xiaoying Tang

Video grounding aims to localize a spatio-temporal section in a video corresponding to an input text query. This paper addresses a critical limitation in current video grounding methodologies by introducing an Open-Vocabulary…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Syed Talal Wasim , Muzammal Naseer , Salman Khan , Ming-Hsuan Yang , Fahad Shahbaz Khan

Video Large Language Models (Video-LLMs) have demonstrated remarkable capabilities in coarse-grained video understanding, however, they struggle with fine-grained temporal grounding. In this paper, we introduce Grounded-VideoLLM, a novel…

Computer Vision and Pattern Recognition · Computer Science 2025-08-22 Haibo Wang , Zhiyang Xu , Yu Cheng , Shizhe Diao , Yufan Zhou , Yixin Cao , Qifan Wang , Weifeng Ge , Lifu Huang

Remote Sensing Visual Grounding (RSVG) aims to localize target objects in large-scale aerial imagery based on natural language descriptions. Owing to the vast spatial scale and high semantic ambiguity of remote sensing scenes, these…

Computer Vision and Pattern Recognition · Computer Science 2026-01-30 Shiqi Huang , Shuting He , Bihan Wen

Reinforcement Learning (RL) benefits Large Language Models (LLMs) for complex reasoning. Inspired by this, we explore integrating spatio-temporal specific rewards into Multimodal Large Language Models (MLLMs) to address the unique…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Xinhao Li , Ziang Yan , Desen Meng , Lu Dong , Xiangyu Zeng , Yinan He , Yali Wang , Yu Qiao , Yi Wang , Limin Wang

Current Video-LLM approaches for Video Temporal Grounding (VTG) typically rely on direct timestamp generation from an unstructured visual-token stream, often leading to brittle numerics and inconsistent boundaries. To address this, we…

Computer Vision and Pattern Recognition · Computer Science 2026-05-22 Zelin Zheng , Xinyan Liu , Ruixin Li , Antoni B. Chan , Guorong Li , Qingming Huang , Laiyun Qing

This paper explores the task of Temporal Video Grounding (TVG) where, given an untrimmed video and a natural language sentence query, the goal is to recognize and determine temporal boundaries of action instances in the video described by…

Computer Vision and Pattern Recognition · Computer Science 2023-05-26 Erica K. Shimomoto , Edison Marrese-Taylor , Hiroya Takamura , Ichiro Kobayashi , Hideki Nakayama , Yusuke Miyao