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Visual grounding (VG) tasks involve explicit cross-modal alignment, as semantically corresponding image regions are to be located for the language phrases provided. Existing approaches complete such visual-text reasoning in a single-step…

Computer Vision and Pattern Recognition · Computer Science 2025-02-26 Sijia Chen , Baochun Li

This paper addresses the challenging task of weakly-supervised video temporal grounding. Existing approaches are generally based on the moment proposal selection framework that utilizes contrastive learning and reconstruction paradigm for…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Xiang Fang , Zeyu Xiong , Wanlong Fang , Xiaoye Qu , Chen Chen , Jianfeng Dong , Keke Tang , Pan Zhou , Yu Cheng , Daizong Liu

Large vision-language models have revolutionized cross-modal object retrieval, but text-based person search (TBPS) remains a challenging task due to limited data and fine-grained nature of the task. Existing methods primarily focus on…

Computer Vision and Pattern Recognition · Computer Science 2025-01-31 Akshay Modi , Ashhar Aziz , Nilanjana Chatterjee , A V Subramanyam

This paper addresses the problem of temporal sentence grounding (TSG), which aims to identify the temporal boundary of a specific segment from an untrimmed video by a sentence query. Previous works either compare pre-defined candidate…

Computer Vision and Pattern Recognition · Computer Science 2021-03-23 Daizong Liu , Xiaoye Qu , Jianfeng Dong , Pan Zhou , Yu Cheng , Wei Wei , Zichuan Xu , Yulai Xie

Temporal language grounding (TLG) aims to localize a video segment in an untrimmed video based on a natural language description. To alleviate the expensive cost of manual annotations for temporal boundary labels, we are dedicated to the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-24 Yuechen Wang , Wengang Zhou , Houqiang Li

Temporal grounding in videos aims to localize one target video segment that semantically corresponds to a given query sentence. Thanks to the semantic diversity of natural language descriptions, temporal grounding allows activity grounding…

Computer Vision and Pattern Recognition · Computer Science 2022-03-29 Juncheng Li , Junlin Xie , Long Qian , Linchao Zhu , Siliang Tang , Fei Wu , Yi Yang , Yueting Zhuang , Xin Eric Wang

Motivated by the success of coarse-grained or fine-grained contrast in text-video retrieval, there emerge multi-grained contrastive learning methods which focus on the integration of contrasts with different granularity. However, due to the…

Information Retrieval · Computer Science 2025-04-08 Xiaolun Jing , Genke Yang , Jian Chu

Temporal grounding aims to retrieve moments of the described event within an untrimmed video by a language query. Typically, existing methods assume annotations are precise and unique, yet one query may describe multiple moments in many…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Hao Zhou , Chongyang Zhang , Yanjun Chen , Chuanping Hu

Temporal Video Grounding (TVG), which requires pinpointing relevant temporal segments from video based on language query, has always been a highly challenging task in the field of video understanding. Videos often have a larger volume of…

Computer Vision and Pattern Recognition · Computer Science 2025-07-08 Feng Yue , Zhaoxing Zhang , Junming Jiao , Zhengyu Liang , Shiwen Cao , Feifei Zhang , Rong Shen

Temporal sentence grounding in videos aims to detect and localize one target video segment, which semantically corresponds to a given sentence. Existing methods mainly tackle this task via matching and aligning semantics between a sentence…

Computer Vision and Pattern Recognition · Computer Science 2019-11-01 Yitian Yuan , Lin Ma , Jingwen Wang , Wei Liu , Wenwu Zhu

Video grounding aims to localize a moment from an untrimmed video for a given textual query. Existing approaches focus more on the alignment of visual and language stimuli with various likelihood-based matching or regression strategies,…

Computer Vision and Pattern Recognition · Computer Science 2021-07-08 Guoshun Nan , Rui Qiao , Yao Xiao , Jun Liu , Sicong Leng , Hao Zhang , Wei Lu

Temporal Video Grounding (TVG) aims to localize temporal moments in an untrimmed video that semantically correspond to given natural language queries. Recently, Graph Convolutional Networks (GCN) have been widely adopted in TVG to model…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Zhanjie Hu , Bolin Zhang , Jianhua Wang , Jianbo Zheng , Chenchen Yan , Takahiro Komamizu , Ichiro Ide , Jiangbo Qian

We introduce ED-VTG, a method for fine-grained video temporal grounding utilizing multi-modal large language models. Our approach harnesses the capabilities of multimodal LLMs to jointly process text and video, in order to effectively…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Shraman Pramanick , Effrosyni Mavroudi , Yale Song , Rama Chellappa , Lorenzo Torresani , Triantafyllos Afouras

Video Temporal Grounding (VTG) aims to extract relevant video segments based on a given natural language query. Recently, zero-shot VTG methods have gained attention by leveraging pretrained vision-language models (VLMs) to localize target…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Jin-Seop Lee , SungJoon Lee , Jaehan Ahn , YunSeok Choi , Jee-Hyong Lee

Video Temporal Grounding (VTG), which aims to ground target clips from videos (such as consecutive intervals or disjoint shots) according to custom language queries (e.g., sentences or words), is key for video browsing on social media. Most…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Kevin Qinghong Lin , Pengchuan Zhang , Joya Chen , Shraman Pramanick , Difei Gao , Alex Jinpeng Wang , Rui Yan , Mike Zheng Shou

Weakly supervised phrase grounding aims at learning region-phrase correspondences using only image-sentence pairs. A major challenge thus lies in the missing links between image regions and sentence phrases during training. To address this…

Computer Vision and Pattern Recognition · Computer Science 2021-04-27 Liwei Wang , Jing Huang , Yin Li , Kun Xu , Zhengyuan Yang , Dong Yu

Today's most accurate language models are trained on orders of magnitude more language data than human language learners receive - but with no supervision from other sensory modalities that play a crucial role in human learning. Can we make…

Computation and Language · Computer Science 2024-03-22 Chengxu Zhuang , Evelina Fedorenko , Jacob Andreas

Despite progress in multimodal large language models (MLLMs), the challenge of interpreting long-form videos in response to linguistic queries persists, largely due to the inefficiency in temporal grounding and limited pre-trained context…

Computer Vision and Pattern Recognition · Computer Science 2024-10-04 Yuxuan Wang , Yueqian Wang , Pengfei Wu , Jianxin Liang , Dongyan Zhao , Yang Liu , Zilong Zheng

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

Temporal sentence grounding in videos (TSGV) aims to localize a temporal segment that semantically corresponds to a sentence query from an untrimmed video. Most current methods adopt pre-trained query-agnostic visual encoders for offline…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Allen He , Qi Liu , Kun Liu , Xinchen Liu , Wu Liu